PM6690 SM Ed4 sharp 3 - Fluke Corporationassets.fluke.com/manuals/6690____smeng0000.pdf · 2006-06-27 · GENERAL INFORMATION Method of Notation ThismanualcontainsdirectionsandinformationthatapplytothePM6690Timer/Counter/Analyzer.Inordertosimplifythereferences,

Timer/Counter/AnalyzerPM6690

Service Manual

II

4822 872 20306May 2006 - Fourth Edition

© Fluke Corporation. All rights reserved.

Printed in Sweden.

GENERAL INFORMATION

Method of Notation

This manual contains directions and information that apply to the PM6690 Timer/Counter/Analyzer. In order to simplify the references,

the following designation system is used throughout the manual:

– PM6690 is abbreviated to '90'.

Warranty

The Warranty Statement is included in the Getting Started Manual.

Declaration of Conformity

The complete text with formal statements concerning product identification, manufacturer and standards used for type testing is avail-

able on request.

Hardware Versions

This Service Manual provides Source of Supply information for the Fluke Model PM6690 Timer/Counter/Analyzer, which may con-

tain an OLD version of the Main CCA, called Version A, or a NEW version of the Main CCA, called Version B. Both the old and the

new version of the Main CCAhave the same part number. All orders for the old version of the Main CCAwill be filled with the new ver-

sion of the Main CCA. When the old version of the Main CCA is returned to the factory for repair, the new version of the Main CCA

will be returned in place of the old version of the Main CCA, if the microprocessor has to be replaced.

Devices with serial numbers up to and including 916779 are equipped with a Triscend microprocessor, whereas devices with higher se-

rial numbers have a Sharp microprocessor. Both are based on an ARM7 core, and from the operator’s point of view the behavior is not

affected. However, essential parts of the main PCB differ, and the corresponding sections of the service manual are consequently af-

fected. Even though large parts of the hardware are common to both versions, we have preferred to divide the pertinent chapters into

separate sections, where certain parts are repeated, all in order to improve legibility and simplify troubleshooting.

Version A refers to devices equipped with the Triscend microprocessor.

Version B refers to devices equipped with the Sharp microprocessor.

The chapters that need special attention are:

Chapter 4, Circuit Descriptions

Chapter 6, Repair

Chapter 8, Replacement Parts

Chapter 9, Schematic Diagrams

� Firmware Compatibility

Despite the relatively large hardware differences, we have managed to integrate the firmware, so that future upgrades can be applied to

both versions by means of the same hex file. Thus there is no need to check the serial number or else find out which processor is inside

the cover. Just proceed according to the instructions given in Chapter 5, Corrective & Preventive Maintenance.

III

This page is intentionally left blank.

IV

Contents

GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . III

1 Safety Instructions

Caution and Warning Statements . . . . . . . . . . . . . . . 1-2

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Line Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2 Performance Check

General Information . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Test Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Preparations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Short Form Specification Test. . . . . . . . . . . . . . . . . . 2-4

Rear Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Measuring Functions. . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Check of HOLD OFF Function . . . . . . . . . . . . . . . . . 2-7

RF Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

3 Disassembly

Removing the Cover . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Prescaler Options . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

OCXO Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

4 Circuit Descriptions

Version A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Block Diagram Description . . . . . . . . . . . . . . . . . . . . 4-4

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Hardware Functional Description . . . . . . . . . . . . . . . 4-6

Front Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Test Routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Version B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Block Diagram Description . . . . . . . . . . . . . . . . . . . 4-12

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Hardware Functional Description . . . . . . . . . . . . . . 4-14

Front Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Test Routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

5 Corrective & Preventive Maintenance

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Instructions for Firmware Upgrade . . . . . . . . . . . . . . 5-2

Utility Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Fan Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Other Important Information . . . . . . . . . . . . . . . . . . . 5-3

6 Repair

Version A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Input Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Timebase Reference Circuits . . . . . . . . . . . . . . . . . 6-12

Prescalers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

Microprocessor & Memories . . . . . . . . . . . . . . . . . . 6-15

Microprocessor Bus & Interfaces . . . . . . . . . . . . . . 6-21

Measuring Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

Version B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32

Input Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36

Timebase Reference Circuits . . . . . . . . . . . . . . . . . 6-40

Prescaler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43

Microprocessor & Memories . . . . . . . . . . . . . . . . . . 6-43

Microprocessor Bus & Interfaces . . . . . . . . . . . . . . 6-49

Measuring Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-55

Safety Inspection and Test After Repair. . . . . . . . . 6-59

General Directives . . . . . . . . . . . . . . . . . . . . . . . . . 6-59

7 Calibration Adjustments

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

General Principles. . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

The Calibration Submenu . . . . . . . . . . . . . . . . . . . . . 7-3

Frequency Reference . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Voltage Reference . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

Calibration SubsystemCommand Reference . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

Preparations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

Input Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13

V

External Reference Input . . . . . . . . . . . . . . . . . . . . 7-13

Internal Reference Oscillators. . . . . . . . . . . . . . . . . 7-14

RF Input 3 GHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14

8 Replacement Parts

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Mechanical Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

Main Board, Version A . . . . . . . . . . . . . . . . . . . . . . . 8-5

Front Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14

Main Board, Version B . . . . . . . . . . . . . . . . . . . . . . 8-16

Parts Unique to Version A. . . . . . . . . . . . . . . . . . . . 8-26

Parts Unique to Version B. . . . . . . . . . . . . . . . . . . . 8-26

Parts Common to Version A and Version B . . . . . . 8-26

9 Schematic Diagrams

How to Read the Diagrams. . . . . . . . . . . . . . . . . . . . 9-2

Version A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

Version B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-25

10 Appendix

How to Replace Surface Mounted Devices. . . . . . . 10-2

Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . 10-3

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

11 Index

VI

Chapter 1

Safety Instructions

WARNING: These servicing instructions are

for use by qualified personnel only. To re-

duce the risk of electric shock, do not

perform any servicing other than that

specified in the Operators Manual unless

you are fully qualified to do so.

Caution and WarningStatements

Introduction

Read this chapter carefully before you check, adjust or repair

the instrument.

It is essential for your own safety to know the restrictions that

are applicable to all equipment that can be connected to line

power. Therefore, read the section on Safety Precautions be-

low.

In addition to the general statements given in this chapter you

will find specific caution and warning statements where nec-

essary throughout the manual.

Safety Precautions

This instrument has been designed and tested for Measurement Cate-

gory I, Pollution Degree 2, in accordance with EN/IEC

61010-1:2001 and CAN/CSA-C22.2 No. 61010-1-04 (including ap-

proval). It has been supplied in a safe condition.

This manual contains information and instructions that should

be followed by the user and the service technician to ensure

safe operation and repair in order to keep the instrument in a

safe condition. It is essential that you follow generally ac-

cepted safety procedures in addition to the safety precautions

specified in this manual.

The instrument is designed to be used by trained personnel

only. Removing the cover for repair, maintenance, and adjust-

ment of the instrument must be done by qualified personnel

who are aware of the hazards involved.

The warranty commitments are rendered void if unautho-

rized access to the interior of the instrument has taken

place during the given warranty period.

CAUTION: Indicates where incorrect proce-

dures can cause damage to, or destruction

of equipment or other property.

WARNING: Indicates a potential danger that

requires correct procedures or practices

to prevent personal injury.

Symbols

Shows where the protective ground terminal is con-

nected inside the instrument. Never remove or

loosen this screw.

Indicates that the operator should consult the manual.

You can, for instance, find such a symbol on the front

panel below the A and B inputs. It points out that the

damage level for the input voltage decreases from 350 Vp to

12 Vrms when you switch the input impedance from 1 M� to

50 �.

If in Doubt about Safety

Whenever you suspect that it is unsafe to use the instrument,

you must make it inoperative by doing the following:

– Disconnecting the line cord

– Clearly marking the instrument to prevent its further op-

eration by unauthorized personnel

For example, the instrument is likely to be unsafe if it is visi-

bly damaged.

Grounding

Grounding faults in the line voltage supply will make any in-

strument connected to it dangerous. Before connecting any

unit to the power line, you must ensure that the protective

ground functions correctly. Only then can a unit be connected

to the power line and only by using a three-wire line cord. No

other method of grounding is permitted. Extension cords must

always have a protective ground conductor.

CAUTION: If a unit is moved from a cold to

a warm environment, condensation may

cause a shock hazard. Ensure, therefore,

that the grounding requirements are

strictly met.

WARNING: Never interrupt the grounding

cord. Any interruption of the protective

ground connection inside or outside the

instrument or disconnection of the protec-

tive ground terminal is likely to make the

instrument dangerous.

Operation

Orientation and Cooling

The instrument can be operated in any position desired. Make

sure that the air flow through the ventilation slots at the top,

1-2 Safety Instructions

and side panels is not obstructed. Leave 5 centimeters (2

inches) of space around the counter.

Fold-Down Support

For bench-top use, a fold-down support is available for use

underneath the counter. This support can also be used as a

handle to carry the instrument.

Rackmount Adapter

If you have ordered a 19-inch rack-mount kit for your instru-

ment, it has to be assembled after delivery of the instrument.

The rackmount kit consists of the following:

– 2 brackets, (short, left; long, right)

– 4 screws, M5 x 8

– 4 screws, M6 x 8

WARNING: Do not perform any internal ser-

vice or adjustment of this instrument

unless you are qualified to do so.

Before you remove the cover, disconnect

mains cord and wait for one minute.

Capacitors inside the instrument can hold

their charge even if the instrument has

been separated from all voltage sources.

� Assembling the Rackmount Kit

– Make sure the power cord is disconnected from the in-

strument.

– Turn the instrument upside down.

See Fig. 1-3.

– Undo the two screws (A) and remove them from the

cover.

– Remove the rear feet by undoing the two screws (B).

– Remove the four decorative plugs (C) that cover the

screw holes on the right and left side of the front panel.

– Grip the front panel and gently push at the rear.

– Pull the instrument out of the cover.

– Remove the four feet from the cover.

Use a screwdriver as shown in the following illustration or a

pair of pliers to remove the springs holding each foot, then

push out the feet.

– Push the instrument back into the cover. See Fig. 1-3.

– Mount the two rear feet with the screws (B) to the rear

panel.

– Put the two screws (A) back.

– Fasten the brackets at the left and right side with the

screws included as illustrated in Fig. 1-1.

– Fasten the instrument in the rack via screws in the four

rack-mounting holes

Safety Instructions 1-3

Fig. 1-1 Dimensions for rackmounting hardware.

Fig. 1-2 Fitting the rack mount brackets on the counter.

Fig. 1-3 Remove the screws and push the counter out of the

cover.

Fig. 1-4 Removing feet from the cover.

The long bracket has an opening so that cables for Input A, B,

and C can be routed inside the rack.

� Reversing the Rackmount Kit

The instrument may also be mounted to the right in the rack.

To do so, first remove the plate on the long bracket and fasten

it on the short one, then perform the preceding steps.

Line Voltage

� Setting

The Counter may be connected to any AC supply with a volt-

age rating of 90 to 265 Vrms, 45 to 440 Hz. The counter auto-

matically adjusts itself to the input line voltage.

� Fuse

The secondary supply voltages are electronically protected

against overload or short circuit. The primary line voltage side

is protected by a fuse located on the power supply unit. The

fuse rating covers the full voltage range. Consequently there

is no need for the user to replace the fuse under any operating

conditions, nor is it accessible from the outside.

CAUTION: If this fuse is blown, it is likely

that the power supply is badly damaged.

Replace the complete power supply unit.

Do not replace the fuse.

1-4 Safety Instructions

Chapter 2

Performance Check

General Information

WARNING: Before turning on the instru-

ment, ensure that it has been installed in

accordance with the Installation Instruc-

tions outlined in Chapter 1 of the

Operators Manual.

This performance procedure is intended for:

– checking the instrument’s specification.

– incoming inspection to determine the acceptability of

newly purchased instruments and recently recalibrated

instruments.

– checking the necessity of recalibration after the specified

recalibration intervals.

NOTE: The procedure does not check every facet of the in-

strument’s calibration; rather, it is concerned primarily

with those parts of the instrument which are essential

for determining the function of the instrument.

It is not necessary to remove the instrument cover to perform

this procedure.

Test Equipment

Preparations

Power up your instrument at least 30 minutes

before checking to let it reach normal operating

temperature. Failure to do so may result in cer-

tain test steps not meeting equipment specifications.

Front Panel Controls

Internal Self-Tests

The test programs forming the self-diagnosis can be activated

from the front panel as follows:

– Press USER OPT

– Press Test.

– Press Test Mode.

– Select one of the six tests available by pressing the

softkey below the label with the name of the test func-

tion. Five of the tests (RAM, ROM, Logic, Display, and

Interface) are individual. They are briefly described be-

low. The sixth, named All, performs all five individual

tests in sequence.

• All - all tests performed in sequence

• RAM - test of RAM memory

• ROM - test of ROM memory

• Logic - test of counter ASIC and other logic circuits.

• Display - test of graphic displaymodule

• Interface - test of GPIB and USB

– Press Start Test.

– If a fault is detected, an error message appears on the

display and the program halts. Note any error messages.

– If no faults are detected, the instrument returns to the

normal measurement mode.

Keyboard Test

See Table 2-3. This test verifies that the timer/counter re-

sponds when you press any key. It is not a functional test.

Such tests are performed later in this chapter. The important

thing here is that something changes on the display when you

press a key. Consequently you can press the keys in almost

any order without paying attention to the exact response, but

for those who want to be more systematic there is a table over-

leaf, where all keys are exercised at least once.

Press the keys as described in the first column and look at the

display for the text in the second column. Some keys change

more text on the display than described here. The display text

mentioned here is the one mostly associated with the selected

key.

NOTE: For the instrument to respond correctly, this test

must be carried out in sequence and you must start

with the DEFAULT setting. Do as follows:

– Press USER OPT.– Press Save/Recall.– Press Recall Setup.– Press Default.

See Table 2-2 for the complete list of default settings.

2-2 Performance Check, General Information

Type of Equipment Required Specifications

Reference Oscillator

10 MHz, 1*10–8

(e.g. 908) for calibrat-ing PM6690/_1_

10 MHz, 1*10–9

(e.g. 909) for calibrat-ing PM6690/_5_ & PM6690/_6_

Voltage Calibrator

DC -50 V to +50 V (e.g. 5500A) forcalibrating the built-in voltage refer-ence, alternatively corresponding DCpower supply + DVM with uncertainty<0.1 %

LF Synthesizer Square/ Sine up to 10 MHz, 10 VRMS

Pulse Generator2 ns rise time, 5 V peak, >10 MHz,continuous & one-shot trigger

Oscilloscope 350 MHz, <3% voltage uncertainty

RF Signal Generator10 MHz to 3 or 8 GHz dep. onprescaler option, 10 MHz ext.ref.

Power Splitter 50 � 6 dB BNC

T Adapter (F-M-F) BNC

Termination 50 � feedthrough BNC

Lowpass Filter 50 kHz (for 1 M� load)

BNC Cables 5 to 7 pcs of suitable lengths

Table 2-1 Recommended equipment for calibration and per-

formance check.

Performance Check, Front Panel Controls 2-3

PARAMETER VALUE/SETTING

Input A & B

Trigger Level AUTO

Trigger Slope POS

Impedance 1 M�

Attenuator 1x

Coupling AC

Filter OFF

Arming

Start OFF

Start Slope POS

Start Arm Delay 200 �s

Stop OFF

Stop Slope POS

Hold-Off

Hold-Off State OFF

Hold-Off Time 200 �s

Time-Out

Time-Out State OFF

Time-Out Time 100 ms

Statistics

Statistics OFF

No. of Samples 100

No. of Bins 20

Pacing State OFF

Pacing Time 20 ms

Mathematics

Mathematics OFF

Math Constants K=1, L=0, M=1

Limits

Limit State OFF

Limit Mode ABOVE

Lower Limit 0

Upper Limit 0

Burst

Sync Delay 200 �s

Start Delay 200 �s

Meas. Time 200 �s

Freq. Limit 300 MHz

Miscellaneous

Function FREQ A

Meas. Time 200 ms

Smart Time Interval OFF

Auto Trig Low Freq 100 Hz

Timebase Reference INT

Table 2-2 Default settings for functions and parameters.

KEY(S) DISPLAY NOTES P/F

STANDBY Off Red standby LED On(Key common to ON)

ON Backlight On Red standby LED Off(Key common to

STANDBY)

INPUT A Input A: Menu for setting Slope,Coupling, Impedance

etc.

Man Trig xx mV

Trig Trig: xx mV Menu for entering nu-meric values

0.123V Trig: 0.123 V

� (5 times) Trig: _ V

4.567 Trig: 4.567 V

� (5 times) Trig: _ V

8.9 Trig: 8.9 V

± Trig: -8.9 V

mV Trig: -8.9 mV

V Trig: -8.9 V

AUTOSET Menu disappears

INPUT B Input B: Menu for setting Slope,Coupling, Impedance

etc.

SETTINGS Settings: Menu for setting MeasTime, Hold-Off, Ref.

Source etc.

ENTER Meas Time: 200 ms

� Meas Time: 500 ms

� Meas Time: 200 ms

EXIT/OK Settings: Menu for setting MeasTime, Hold-Off, Ref.

Source etc.

EXIT/OK Menu disappears

MATH/LIM Math/Limit: Menu for selectingpost-processing for-mula and alarm limit

USER OPT User options: Menu for Calibration,Memory Management,

Interface etc.

CANCEL Menu disappears

HOLD/RUN Hold At upper right corner

HOLD/RUN Hold disappears

MEAS FUNC Measure function: Menu for selectingmeasurement function

� Period Cursor position markedby text inversion

ENTER Single A

EXIT/OK Menu disappears Period Single A: at up-per left corner

STAT/PLOT Period Single A

MEAN:

Aux parameters: Max,Min, P-P, Adev, Std

VALUE Stat parameters dis-

appear

Table 2-3 Keyboard test.

Short Form SpecificationTest

Sensitivity and Frequency Range

– Recall the DEFAULT settings.

– Press INPUT A.

– Select 50 � input impedance, 1x attenuation, MANual

trigger and Trigger level 0 V.

– Connect a signal from a HF generator to a BNC power

splitter.

– Connect the power splitter to Input A of your counter

and an oscilloscope.

– Set the input impedance to 50 � on the oscilloscope.

– Adjust the amplitude according to the following table.

Read the level on the oscilloscope. The timer/counter

should display the correct frequency.

– Connect the signal to Input B.

– Press INPUT B.

– Select 50 � input impedance, 1x attenuation, MANual

trigger and Trigger level 0 V.

– Press MEAS FUNC � Freq � Freq A �B

– Repeat the measurements above for Input B.

Voltage


– Press MEAS FUNC � Volt � Vpp � A

– Press INPUT A and select DC coupling. Do not apply an

input signal to Input A yet.

– Press EXIT/OK.

– The display should now indicate

(disregard the main parameter VPP):

VMIN = 0 ± 0.015 V and

VMAX = 0 ± 0.015 V

– Adjust the current limit of the voltage source to

<200 mA.

– Connect +2.500 VDC to Channel A, using the external

low-pass filter on the input.

– The display should now indicate:

VMIN = 2.500 ± 0.040 V and

VMAX = 2.500 ± 0.040 V

– Repeat the measurement with inverted polarity.

– Press INPUT A and select 10x.

– Press EXIT/OK.

CAUTION: Before the next step, make sure

the input impedance is still 1 M�. Apply-

ing more than 12 V without proper current

limiting may cause extensive damage to

the main PCB, if the impedance is set to

50 �.

– Change the DC level to +50.00 V.


VMIN = 50.00 ± 0.65 V and

VMAX = 50.00 ± 0.65 V

– Repeat the measurement with inverted polarity.

– Disconnect the DC voltage from Channel A.

– Remove the external low-pass filter.


– Press EXIT/OK.

– Connect a sinusoidal signal to Input A with an amplitude

of 4.000 Vpp and a frequency of 100 kHz.

– The display should now indicate: 4.000 ± 0.150 VPP.


– Press EXIT/OK.

– Change the amplitude to 18.00 VPP.


18.00 ± 0.84 VPP.

– Disconnect the signal from Channel A.

– Press MEAS FUNC � Volt � Vpp �B

– Press INPUT B and select DC coupling. Do not apply an

input signal to Input B yet.

– Press EXIT/OK.

– The display should now indicate

(disregard the main parameter VPP):

VMIN = 0 ± 0.015 V and

VMAX = 0 ± 0.015 V

– Proceed by repeating the measurements for Input B as

described above for Input A.

Trigger Indicators vs. Trigger Levels

NOTE: This test must be performed in the sequence given.


2-4 Performance Check, Short Form Specification Test

Trigger Level

(manually set)

Trigger Indicator Pass

Input A Input B

+1 V off

-1 V on

0.0 V blinking

Table 2-4 Trigger indicator check.

Frequency

(MHz)

Level Pass/Fail

mVrms dBm Input A Input B

10 15 –23

50 15 –23

100 15 –23

200 15 –23

300 25 –19

Table 2-5 Sensitivity for inputs A & B at various frequencies

– Press INPUT A and select MANual trigger level and 50 �

input impedance.

– Connect the LF synthesizer to Input A. Use the follow-

ing settings (into 50 �):

Sine, 10 kHz, 0.9 VPP, and +0.50 VDC.

– Verify that the three modes for the trigger indicator are

working properly by changing the trigger level:– Press the Trig key and enter +1 V via the keyboard,

then verify by pressing EXIT/OK. Check the triggerindicator according to Table 2-4.

– Press the Trig key and enter –1 V via the keyboardby pressing the ± key, then verify by pressingEXIT/OK. Check the trigger indicator according toTable 2-4.

– Press the Trig key and enter 0 via the keyboard, thenverify by pressing EXIT/OK. Check the trigger indica-tor according to Table 2-4.

– Apply the signal to Input B instead.

– Press MEAS FUNC � Freq � Freq (A) � B

– Press INPUT B and select MANual trigger level and

50 � input impedance..

– Repeat the trigger level settings above to verify the three

trigger indicator modes for Input B.

Input Controls


– Connect the LF synthesizer to Input A. Use the same

settings as in the previous test.

– Press INPUT A and select DC and 50 �.

– Press EXIT/OK.

– Check the Vmax and Vmin voltage levels on the display

according to the first row in Table 2-6.

– Perform the rest of the settings in sequence, and read the

corresponding Vmax and Vmin values. Remember that all

these values are approximate and serve only as indica-

tors of state changes.

– Connect the generator to Input B.

– Press MEAS FUNC � Freq � Freq (A) � B

– Press INPUT B and select DC and 50 �.

– Press EXIT/OK.

– Check the Vmax and Vmin voltage levels on the display

according to the first row in Table 2-6.

– Perform the rest of the settings in sequence, and read the

corresponding Vmax and Vmin values.

Reference Oscillators

X-tal oscillators are affected by a number of external condi-

tions like ambient temperature and supply voltage. Aging is

also an important factor. Therefore it is hard to give limits for

the allowed frequency deviation. The user himself must de-

cide the limits depending on his application, and recalibrate

the oscillator accordingly.

To check the accuracy of the oscillator you must have a cali-

brated reference signal that is at least five times more stable

than the oscillator that you are testing. See Table 2-7 and the

list of test equipment on page 2-2. If you use a non-10 MHz

reference, you can use the mathematics in the timer/counter to

multiply the reading.

– Recall the DEFAULT settings. See page 2-2

– Connect the reference to input A

– Check the readout against the accuracy requirements of

your application.

� Acceptance Test

Table 2-7 can serve as an acceptance test and gives a worst

case figure after 30 minutes warm-up time. All deviations that

can occur in a year are added together.

Resolution Test

– Connect the pulse generator to a power splitter.

– Connect one side of the power splitter to Input A on the

counter using a coaxial cable.

– Connect the other side of the power splitter to Input B

on the counter.

Settings for the pulse generator:

– Amplitude = 2 VPP, (high level +2V and low level 0 V)

– Period = approx. 1 �s

– Duration = approx. 50 ns

– Rise time = 2 ns

Restore the timer/counter's default settings and make the fol-

lowing changes:

– Function = Time A-B

– Press STAT/PLOT key to the right of the display.

– Settings for INPUT A and INPUT B:

50 � input impedance

MANual trigger level

Performance Check, Short Form Specification Test 2-5

Settings Vmax Vmin Pass/Fail

Input A Input B

INPUT A, DC, 50 � +950 mV +50 mV

AC +450 mV -450 mV

10X +0.45 V -0.45 V

1 M� >+0.45 V <-0.45 V

Table 2-6 Input controls check.

Oscillator Frequency Readout Suitable

Reference

P/F

Standard(PM6690/_1_)

10.00000000 MHz � 150 Hz 908

OCXO(PM6690/_5_)

10.00000000 MHz � 1 Hz 909

OCXO(PM6690/_6_)

10.00000000 MHz � 0.25 Hz 909

Table 2-7 Acceptance test for oscillators.

Trig level = 0.5V

DC coupling

The standard deviation (Std) should be <100 ps.

Rear Inputs/Outputs

10 MHz OUT

– Connect an oscilloscope to the 10 MHz output on the

rear of the counter. Use a coaxial cable and 50 � termi-

nation.

– The output voltage should be sinusoidal and above 1

VRMS (2.8 Vp-p).

EXT REF FREQ INPUT


– Connect a stable 10 MHz signal (e.g REF OUT from an-

other counter) to input A.

– Connect a 10 MHz, 100 mVRMS, (0.28 VP-P) signal from

the LF synthesizer to EXT REF IN.

– Select Ext Ref. by keying in the following sequence:

SETTINGS � Timebase Ref � Ext

– The display should show 10 MHz.

– Change the external reference frequency to 5 and

1 MHz.

– The counting should continue, and the display should

still show 10 MHz.

EXT ARM INPUT

– Proceed from the test above.

– Select MANual trigger.

– Settings for the pulse generator:

single shot pulse, manual trigger,

amplitude TTL = 0 - 2 VPP, and

duration = 10 ns.

– Connect the pulse generator to Ext Arm Input.

– Activate start arming by keying in the following se-

quence:

SETTINGS � Start Chan � E

– The counter does not measure.

– Apply one single pulse to Ext Arm Input.

– The counter measures once and shows 10 MHz on the

display.

Measuring Functions

– Connect a 10 MHz sine wave signal with approx.

1 VRMS amplitude into 50 � via a power splitter to Input

A and Input B, e.g. from 10 MHz Out on the rear panel.


Select the following settings for the timer/counter via INPUT

A and INPUT B:

– 50 � impedance for A and B.

– MANual trigger.

2-6 Performance Check, Rear Inputs/Outputs

Selected Function Action Display P/F

FREQ A 10 MHz 2)

FREQ B 10 MHz 2)

FREQ C - - - - - - - - - - - - - - 3)

FREQ RATIO A/B 1.0000000

FREQ RATIO C/B 0.0000000 3)

PER SINGLE A 100 ns 2)

PER SINGLE B 100 ns 2)

PER AVERAGE A 100 ns 2)

PER AVERAGE B 100 ns 2)

PULSE POS A 50.000 ns 1)

PULSE NEG A 50.000 ns 1)

TIME INT A to B 0 ± 1 ns

Select NEGSLOPE B

50.000 ns 1)

RISE TIME A Select AUTOtrigger

30.000 ns 2)

FALL TIME A 30.000 ns 2)

PHASE A rel B 180° or -180° 1)

PHASE B rel A 180° or -180° 1)

PHASE A rel A 0°

DUTY POS A 0.500000 1)

DUTY NEG A 0.500000 1)

VOLT MAX A +0.75 V 2)

VOLT MIN A -0.75 V 2)

Table 2-8 Measuring functions check

1) Value depends on the symmetry of the signal.

2) Exact value depends on input signal.

3) If an RF option is installed.

– Check that the timer/counter performs the correct mea-

surement by displaying the result as shown under the

“Display” column in Table 2-8.

– Select function via MEAS FUNC

Check of HOLD OFFFunction


– Select Period Single A.

Select the following common timer/counter settings for both

Input A and Input B via the hard menu keys INPUT A and IN-

PUT B:

– 50 � impedance.

– DC coupling.

– MANual trigger, x1 attenuation.

– Press SETTINGS and activate Hold Off. Select Hold Off

On and set the Trigger Hold Off time to the minimum

value 20 ns.

– Connect the rear panel output marked 10 MHz OUT to

Input A.

– Increase the Trigger Hold Off time in steps by means of

the UP cursor key and note the results:

If Trigger Hold Off time <100 ns the result is about 100 ns,

i.e. the same value as without Hold Off.

If Trigger Hold Off time >100 ns the result is about 100 ns +

Trig Hold Off time.

– Connect the signal to Input B, select

Period Single B and repeat the tests above.

RF Options

Input C Check

To verify the specification of the different RF prescalers

(Input C), use the following basic test setup:

– Connect the output of a signal generator covering the

specified frequency range to the RF input of the counter.

– Connect the 10 MHz REF OUT from the generator to

the EXT REF IN on the rear panel of the counter.

– Choose Meas Ref from the SETTINGS menu and select

External.

– Choose Freq C from the MEAS FUNC menu.

– Generate a sine wave in accordance with the tables.

– Verify that the counter is counting correctly. (The last

digits will be unstable)

Performance Check, Check of HOLD OFF Function 2-7

Frequency Amplitude P/F

MHz mVRMS dBm

100-300 20 -21

300-2500 10 -27

2500-2700 20 -21

2700-3000 40 -15

Table 2-9 RF input sensitivity,

3 GHz Option.

Frequency Amplitude P/F

MHz mVRMS dBm

300-500 20 -21

500-3000 10 -27

3000-4500 20 -21

4500-6000 40 -15

6000-8000 80 -9

Table 2-10 RF input sensitivity,

8 GHz Option.


2-8 Performance Check, RF Options

Chapter 3

Disassembly

The terms in the following figure are used in all descriptions

in this manual.

The PM6690 can be equipped with a number of options and

accessories. Built-in timebase and prescaler options can be

identified by pressing USER OPT � About on the front

panel.

The following built-in options exist or are planned:

– Option PM6690/6__ 3 GHz RF Prescaler Input

– Option PM6690/7__ 8 GHz RF Prescaler Input

– Option PM6690/_5_ Very High Stability OCXO

– Option PM6690/_6_ Ultra-High Stability OCXO

The location of these optional parts is illustrated in Fig. 3-2

and Fig 3-3. Removing the Cover

WARNING: Do not perform any internal ser-

vice or adjustment of this instrument

unless you are qualifyed to do so.

WARNING: When you remove the cover you

will expose live parts and accessible ter-

minals which can cause death.

WARNING: Although the power switch is in

the OFF position, line voltage is present

inside the instrument. Use extreme cau-

tion.

WARNING: Capacitors inside the instrument

can hold their charge even if the instru-

ment has been separated from all voltage

sources.

– Make sure the power cord is disconnected from the

counter.

– Turn the counter upside down.

– Remove the two screws at the bottom and the two

screws in the rear feet.

– Remove the four decorative plugs (C) that cover the

four screw holes on the right and left side of the front

panel.

– Grip the front panel and gently push at the rear.

3-2 Disassembly, Removing the Cover

Front Bottom

Right

RearTop

Left

Figure 3-1 Terms used in this manual.

Rear Panel Inputs

Basic Board

Power Supply

RF Inputs3 GHz & 8 GHz

Input Amplifier

OptionalOscillator

Fan

Figure 3-2 Interior layout including 3 GHz or 8 GHz

prescaler option.

RF Input 20 GHz

Figure 3-3 Interior layout with 20 GHz prescaler option.

– Pull the interior unit out of the cover.

Reinstalling the Cover

– Push the counter gently back into the cover.

– Turn it upside down

– Fit the two screws at the bottom.

– Fit the two rear feet with their screws to the rear panel.

– Fit the four decorative plugs.

Fan

– Disconnect the power cable.

– Remove the cover from the counter. See page 3-2.

– Remove the four screws, nuts and washers that fix the

fan to the rear panel.

– Disconnect the fan power supply connector from the

main PCB and remove the fan.

– When reinstalling the fan, make sure the air-flow arrow

on the fan points to the rear of the counter and the black

wire is oriented toward the rear panel.

Prescaler Options



– Disconnect the cable from the mini-coax connector on

the RF input.

– Press the clips apart and lift the RF input PCA straight

up and out.

– When installing the RF input, make sure the connector

pins fit exactly in the holes of the connector housing.

Disassembly, Fan 3-3

Figure 3-4 The fan is fixed with four screws and nuts. The 3 GHz & 8 GHz prescalers are fixed with snap-in clips. The OCXO is sol-

dered to the main board.

4 screws to remove

C

Figure 3-5 Remove the screws and pull out the main

PCB.

– Reconnect the RF input cable.

OCXO Options



– Turn the instrument upside down.

– Locate the five solder joints and remove the OCXO with

conventional desoldering technique for plated-through

holes.

3-4 Disassembly, OCXO Options

Chapter 4

Circuit Descriptions


4-2

Version A

The descriptions in this section apply to instru-

ments having a Triscend microprocessor.

See General Information on page III for details on

relevant serial numbers etc.

Version A 4-3

Block Diagram Description

General

The PM6690 Timer/Counter consists of three main units:

– Front unit

– Main printed circuit board

– Rear panel unit

Several options exist:

– Prescalers on separate PCBs covering different fre-

quency ranges (3 GHz and 8 GHz)

– Two OCXO timebases (very high & ultra-high stability)

– Rackmount kit

The chassis of the counter consists of a front piece molded in

aluminum, an aluminum rear panel, and two extruded alumi-

num bars that hold the front and rear panels together. This unit

can be slid into the aluminum cover of the instrument.

The main circuit board is fixed to the two bars. The display

circuit board is fixed to the front piece. A detachable connec-

tor joins the electronics of the front unit and the main board,

and the molded front piece is fixed with screws to the two alu-

minum bars. The rear panel is also fixed to the bars with

screws.

The front unit contains all functions needed for the user com-

munication: keyboard, display and input BNCs. All other

electrical functions are on the main board. The rear panel has

no PCB. The connectors here are all soldered directly to the

main circuit board.

Block Diagram

Figure 4-1 contains a block diagram of the electrical functions

of the counter. They are divided among the main circuit board,

the display board, the rear panel and the optional prescaler

board. See the schematic diagrams in Chapter 9 for complete

information.

Most functions are placed on the main board:

– Input amplifiers with trigger level circuits

– Power supply

– Measurement logic

– Microcomputer circuitry

– GPIB interface

– USB interface

– External reference input

– External arming input

The rear panel unit is made of aluminum with a number of

mounted connectors, a fan and a power line inlet with filter.

Most connectors are soldered directly to the main board.

NOTE: Schematic diagrams in this chapter are simplified.

For complete information, see Chapter 9.

4-4 Block Diagram Description

Block Diagram Description 4-5

ON/OFF

RESET MICROPROCESSORARM 7

STD OSC

OPT OSC

100 MHzPLL

FAN

STDBYLED

KEYBOARD

LCD

TEMPSENSOR

USB

GPIB

GATE LED

TRIG LED A

TRIG LED B

INT REF OUT

INTERPOLATORS4 X

EXT CTRL IN

EXT REF IN

TRIG LVL

INPUTAMPLIFIERS

PRESCALER

MEASURING LOGIC(FPGA)

LVLCONV

LINEPWR

AC/DC

SEPARATE BOARD

+15 V -15 V+5 V

POWERSUPPLY

+15 V

+12 V

+5 V

-12 V

-5.2 V

-2.1 V

+3.3 V

+2.5 V

+1.8 V

JTAGI C2

DISPLAY BOARD

SPI

SPI

C

A

B

OPTION

DISPLAY BOARD

**

*

*

*

* REAR PANEL CONNECTORS

-FLASH 8 MB-SDRAM 32 MB

MEMORY

Figure 4-1 Block diagram of the '90'.

Hardware Functional Description

Front Unit

The front unit consists of a front piece in molded aluminum, a

silicon rubber keypad with conducting contact surfaces, a

graphic LCD with LED backlight, and a PCB having etched

gold-plated keyboard contacts and a dedicated LCD power

supply.

Display

The display is a 320*97 pixels graphical LCD with LED

backlight. The LCD controller is part of the processor, and it

sends data and control signals to the drivers in the LCD mod-

ule. Display ON is controlled via the I2C bus and the keyboard

IC. The LCD voltages are generated by a DC/DC converter.

Five different voltages are generated. A control signal from

the processor switches the converter ON/OFF and also sets

the contrast of the display.

The 4 LEDs on the display board are controlled from the mea-

suring logic and the ON/OFF circuit.

Keyboard

The PCB covers the back of the front unit. The keys are laid

out as a crosspoint switch matrix consisting of 25 regular push

buttons plus a special power button. When one of the buttons

is depressed, the dedicated keyboard IC U3 responds by

sending an interrupt to the processor. The processor scans the

keyboard over the I2C bus to find out which button calls for

attention. The power button differs from the others by having

a dual function. In Standby Mode it turns on the ON/OFF cir-

cuit directly, but when the counter is ON, it is read as any other

button. Then the processor turns off the counter. This arrange-

ment is necessary since the processor is inactive in standby

mode.

Main Board

Input Amplifiers

Input amplifiers A and B are identical with >300 MHz band-

width. They are controlled by the processor with relays etc.

The analog input signal is transformed to a digital signal. The

output signals are LVPECL (+2.4 V and +1.2 V approxi-

mately) and fed to the measuring logic.

For a block diagram of the input amplifiers, see Figure 4-2.

� Impedance Selector

This stage selects 1 M� or 50 � input impedance with a relay.

In 50 � mode 11 resistors are used for dissipating the input

power, up to a maximum of 2.9 W (12 Vrms).

� Attenuator

This stage has two parts, a fixed preattenuator (approximate

attenuation ��) and a cascaded relay-operated ��/�� step

attenuator. The variable capacitors are used for adjusting the

frequency response of the attenuators.

� AC/DC

This stage selects AC or DC coupling with a relay.

� Limiter

The voltage limiter protects the impedance converter against

overvoltage. The �5 V applied to the input BNC is divided to

approximately �2.1 V by the attenuator. The limiter clamps

the voltage to approximately �2.8 V.

� Impedance Converter

Split-band technique is used for achieving good frequency re-

sponse over a wide range. The HF signal is fed via an

AC-coupled FET stage. The LF signal (bandwidth DC to ap-

proximately 10 kHz) goes via an operational amplifier. The

signals are added together at the source of the FET. The output

signal from the buffer stage (see below) is fed back to the op-

erational amplifier. A trimmer potentiometer is used for

equalizing the gain in the two signal paths (approximately

�0.9).

� Filter

A lowpass RC filter with an approximate cutoff frequency of

100 kHz can be switched in via a transistor.

� Buffer

Before the signal is fed to the Crossover Switch, it passes a

current-amplifying buffer stage that can drive the following

low impedance stages.

4-6 Hardware Functional Description

� Crossover Switch

This stage uses relays to direct the signal to the two compara-

tors. The following combinations are possible:

• IN A to COMP A and IN B to COMP B

• IN A to both COMP A and COMP B

• IN B to both COMP A and COMP B

� Comparator

The comparator converts the analog signal to a binary logic

signal, with ECL levels (-0.9 V and –1.7 V). The trigger point

is set by a voltage from the trigger level circuitry.

Temperature-compensated circuitry generates the voltages

that control the hysteresis of the comparator. A trimmer

potentiometer adjusts the hysteresis window.

� Trigger Level Generation

Two 12-bit DACs in a single IC generate the two trigger levels

for Channel A resp. Channel B. A 2.5 V DC reference IC sup-

plies the reference voltage to the DACs. The DACs are con-

trolled by the processor over the SPI bus. The �5 V dynamic

range at the BNC of the input amplifier is converted to ap-

proximately �2.1 V at the comparator. This range must be

covered by the DAC. The voltage step from the DAC is ap-

proximately 1.2 mV, corresponding to 2.9 mV per step at the

BNC. Closed Case Calibration (CCC) is used for adjusting

the trigger levels. A known reference level is applied to the

BNC and the processor finds out the appropriate setting of the

DAC to match the reference level.

� Logic Level Conversion

The signals from the comparators must be converted from

ECL levels to LVPECL levels. There are three converter cir-

cuits. One for Channel A , one for Channel B and one for the

Set-Reset channel. The two main channels are fed to a Set-Re-

set flip-flop to make one-channel measurements with variable

hysteresis possible. There is also a converter for the signal

from an optional prescaler. It has PECL levels (+4.1 V and

+3.4 V) that are converted to LVTTL levels (+2.4 V and 0 V).

Oscillator Circuits

The processor has a 32768 Hz crystal. An internal PLL in the

processor uses the 32 kHz signal to make the internal proces-

sor clock, approximately 30 MHz. The USB IC has a 6 MHz

crystal to make an internal clock and the GPIB IC has a 40

MHz crystal to make an internal clock.

The measurement reference oscillator (timebase) for the

timer/counter is a 10 MHz crystal oscillator or an optional

oven-controlled crystal oscillator (OCXO). Only one of these

is mounted. The user can also select an external reference sig-

nal, connected to the External Reference Input BNC on the

rear panel.

The standard oscillator consists of an inverter and a crystal.

The processor controls the frequency of the oscillator with a

PWM signal. The PWM signal is filtered to a DC level that

controls the capacitance of a capacitance diode. The varying

capacitance changes the frequency of the oscillator. The stan-

dard oscillator is adjusted with Closed Case Calibration. Ap-

ply a 10 MHz reference signal to Input A. The processor will

find the correct PWM signal to make the internal reference

frequency equal to the external reference frequency.

The optional oven-controlled oscillator is a complete oscilla-

tor in a small hermetic metal box. An internal accurate DC

voltage is available for use as a reference for a 12-bit DAC.

The filtered output voltage from the DAC sets the frequency

of the oven oscillator. The processor controls the DAC via the

SPI bus. The same Closed Case Calibration as for the stan-

dard oscillator is used. The oven oscillator is kept warm if the

line power is connected to the timer/counter, even if it is

switched off (in standby mode).

Hardware Functional Description 4-7

AC/DCCOUPLATTIMP LIMITER

- +

IMPCONV LP FILTER BUFFER

CROSSOVERSWITCH

- +

AC/DCCOUPL

ATTIMP LIMITER IMPCONV

LP FILTER BUFFER

LVL SHIFT

ECL

LVPECL

LVL SHIFT

ECL

LVPECL

S/RFLIP-FLOP

ECL

LVPECL

A

B

TRGLVL A

TRGLVL B

OPTIONAL PRESCALER

PECL

LVTTL

C

TO

ME

AS

UR

ING

LO

GIC

Figure 4-2 Input amplifier block diagram.

The 10 MHz reference signal is multiplied in a PLL to

100 MHz. The 100 MHz signal is used in the measuring logic

as a reference. The processor controls the PLL IC with the SPI

bus. A 100 MHz LC oscillator is used as the controlled ele-

ment where part of the C is a variable capacitance diode. Its

capacitance is controlled with a DC voltage from the PLL IC,

thus changing the frequency. The 10 MHz reference signal is

applied to the PLL IC as its reference and the 100 MHz output

frequency is exactly 10 times the reference frequency.

External Reference Input

A 1, 2, 5 or 10 MHz reference signal can be connected to the

rear panel BNC. After amplification in an operational ampli-

fier narrow pulses are made in two D flip-flops, one narrow

pulse for each input cycle. These pulses are fed to the 10 MHz

crystal filter. After the filter a reconstructed 10 MHz signal is

available. A variable capacitor is used for adjusting the filter.

Internal Reference Output

The selected 10 MHz reference signal (standard/oven oscilla-

tor or external reference) is available on the rear panel. The 10

MHz reference signal that is used internally by the dedicated

counter circuit (FPGA) logic is also sent to an output pin on

the FPGA. It is filtered to a sine wave and amplified in an out-

put buffer stage having 50 � drive capability.

Measuring Logic

The measuring logic consists of an FPGA, four interpolators

and an external control input on the rear panel. The FPGA

core uses +1.8 V supply voltage and the I/Os use +3.3 V sup-

ply voltage.

The FPGA is controlled by the processor over a 16-bit micro-

processor bus. Input signals (A, B, prescaler etc) and refer-

ence clock (internal 10 MHz oscillator or external reference)

are selected inside the FPGA. The logic for all measuring

functions and support functions (trigger indicators, start de-

lay, pacing etc) are inside the FPGA. A 100 MHz reference

clock is generated by a PLL circuit giving 10 ns basic mea-

surement resolution. To increase the measurement resolution

further, external interpolators are used. The measuring logic

also controls three LEDs on the display board; a GATE LED

indicating that a measurement is in progress, and two trigger

indicators telling that the comparators are triggering on the in-

put signals. A separate 32-bit bus is used for transferring mea-

surement data from the FPGA to the processor. Some control

signals to the hardware come from the FPGAdue to a shortage

of processor pins.

The four external interpolators are identical. Depending on

the selected measurement function 0, 2, 3 or 4 interpolators

are used. A pulse representing the time from an event on the

input to the following rising edge of the 100 MHz reference is

fed to the interpolator. During the pulse time a constant cur-

rent is charging a capacitor. The voltage on the capacitor is

measured with a 10-bit ADC. The capacitor is discharged and

the interpolator is ready for a new measurement.

An external control input BNC is located on the rear panel. A

signal applied to this connector can be used for controlling the

start of a measurement, for instance. A comparator converts

the analog input signal to a logic signal.

Processor Circuits

The processor is a Triscend A7S. It contains an ARM7 core

and peripherals. It runs on a 30 MHz internal clock. The core

uses 2.5 V supply voltage and the I/Os use 3.3 V supply volt-

age.

A separate memory bus communicates with a 16-bit 8 MByte

flash memory and a 32-bit 32 MByte SDRAM. The flash

memory contains the program, data for loading the FPGA,

and stored data (calibration data etc.). At power-up the code is

copied from the flash to the SDRAM. It is run from the

SDRAM for faster execution.

The processor has a JTAG interface with a connector on the

circuit board.

A reset IC monitors the three main logic supply voltages, +3.3

V, +2.5 V and + 1.8 V. If a supply voltage fails, the processor

will be reset.

The regular 16-bit microprocessor bus is used for controlling

the FPGA, the GPIB interface and the USB interface. A sepa-

rate 32-bit bus is used for fetching measurement data from the

measuring logic.

Two other buses are also used, an SPI bus and an I2C bus. The

SPI bus is an output only bus and the processor controls the

100 MHz PLL, the trigger level DACs, and the DAC for the

optional oven oscillator. The I2C bus is bidirectional and used

for communication with the temperature measurement IC, the

display board (keyboard + LCD), the prescaler (optional), and

the relays and filters in the input amplifier.

The temperature reading over the I2C bus is used for con-

trolling the fan speed. A PWM output is utilized. The signal is

filtered and the resulting DC voltage controls the fan.

Another PWM output is used for controlling the frequency of

the standard crystal oscillator.

The LCD controller is a peripheral inside the processor. This

controller sends signals and data to the driver circuits in the

LCD on the display board.

The processor also controls the OFF switch. Only a signal

from the processor can switch off the power. The OFF button

on the front panel is read by the processor. ON is handled

without the processor, since it cannot respond to external

stimulus in standby mode.

Power Supply

This timer/counter has no primary power switch. If connected

to line power there are live parts inside the cabinet, and some

supply voltages are present on the main circuit board, even if


the secondary power switch on the front panel has been turned

off (standby mode).

A semi-protected AC/DC module is placed on spacers over

the main circuit board. It delivers three regulated DC voltages

to the counter, + 15 V, + 5 V and –15 V. When the counter is

connected to line power, these voltages are always present.

There is a + 5 V trimmer potentiometer on the AC/DC mod-

ule.

The ON/OFF circuit is active as soon as the counter is con-

nected to line power. The instrument automatically powers up

when line power is applied. Only the processor can switch the

circuit to OFF state (standby mode). Then only the power but-

ton on the front panel can switch the instrument to ON. Once

connected to line power and in OFF state (standby mode),

supply voltage +12 VU is distributed to the oven oscillator to

keep it warm. In standby mode a red LED is lit on the front

panel. To keep the AC/DC module stable in this mode, a

dummy load is connected to draw a quiescent current of 0.1 A

at +5 V.

The three main voltages are +15 V, +5 V and –15 V from the

AC/DC module. All other supply voltages are generated from

them and are, except for +12 VU to the oven oscillator,

switched off in standby mode.

Linear regulators are used for generating stable voltages with

low noise and without spikes. Some of them have a resistor

net at the input to dissipate part of the heat generated. Thus the

regulator itself will run cooler. The following voltages are

generated in this way:

+3.3 VA from +5 VU

-5.2 VA from -15 VU

-5.2 VI from -12 VA

-2.1 V from -12 VA

-12 VA from -15 VU

+12 VA from +15 VU

+12 VU from + 15 VU, to oven oscillator, not switched off in

standby mode

For digital and general use supply voltages are generated by

DC/DC converters:

+3.3 VD from +5 VU

+5 VD from +5 VU via a switch IC

+15 VD from +15 VU via a switch transistor

+2.5 V from +5 VU

+1.8 V from +5 VU

Communication Interfaces

Both a GPIB and a USB interface are available for communi-

cation with external bus controllers. The connectors are lo-

cated on the rear panel.

The GPIB consists of an IC. Only 8 bits of the 16-bit micro-

processor bus is used. Due to different supply voltages for the

processor (+3.3 V) and the GPIB circuit (+5 V), a buffer IC is

used for isolating the +5 V GPIB IC from the processor bus. A

40 MHz crystal is used for generating a local clock.

The USB consists of an IC. It communicates with the proces-

sor over the 16-bit microprocessor bus. A 6 MHz crystal is

used for generating a local clock.

Rear Panel Unit

The rear panel is made of aluminum. A number of connectors

mounted on this unit are accessible to the user, see Figure 4-3.

I/O:

– GPIB communication connector.

– USB communication connector

INPUTS:

– External reference (BNC)

– External arming (BNC)

– Power supply inlet including EMI filter


!

!

!

!

!

!

10 MHz OUT1Vrms IN 50W

EXT REFFREQ INPUT

EXT ARMINPUT E

INPUT A INPUT B INPUT C

GPIB IEEE 488USB

191125

Figure 4-3 Rear panel, PM6690.

– Optional main inputs replacing corresponding front

panel inputs

OUTPUTS:

– Internal reference 10 MHz (BNC)

Prescaler Circuit Board

There are several different optional prescalers available with

different frequency ranges. The prescaler is located on a sepa-

rate circuit board that is connected to the main circuit board

with a PCB connector.

A typical prescaler consists of a limiter, an amplifier, a fre-

quency divider, and a detector. The limiter and the amplifier

condition the input signal so that the amplitude to the divider

is constant. The divider scales the input signal so that it can be

handled by the measuring logic on the main circuit board. A

detector switches off the output signal from the divider if the

input level is too low for the divider to work correctly (divid-

ers often oscillate without input signal).

Test Routines

Built-in Test Routines

The test routines are those accessible via the USER OPT key.

– Press USER OPT � Test � Test Mode

– Choose one of the five alternatives:

1. All - Perform the four basic tests below in sequence

2. Memory - Test RAM and ROM

3. Logic - Test measuring logic circuits

4. Display - Test the graphic LCD display

5. Interface - Test the two standard interfaces, GPIB and

USB

Power-On Tests

Certain tests are automatically performed at power-up. Errors,

if any, are reported on the display.


LimiterAmplifier

1Amplifier

2&3Amplifier

4&5

AGC1 AGC2

Voltageregulator

Dividers

Detector

Not C

Test go

Input

Figure 4-6 Typical prescaler option, block diagram

Version B


ments having a Sharp microprocessor.



Version B 4-11

Block Diagram Description

General

The PM6690 Timer/Counter consists of three main units:

– Front unit

– Main printed circuit board

– Rear panel unit

Several options exist:

– Prescalers on separate PCBs covering different fre-

quency ranges (3 GHz and 8 GHz)

– Two OCXO timebases (very high & ultra-high stability)

– Rackmount kit

The chassis of the counter consists of a front piece molded in

aluminum, an aluminum rear panel, and two extruded alumi-

num bars that hold the front and rear panels together. This unit

can be slid into the aluminum cover of the instrument.

The main circuit board is fixed to the two bars. The display

circuit board is fixed to the front piece. A detachable connec-

tor joins the electronics of the front unit and the main board,

and the molded front piece is fixed with screws to the two alu-

minum bars. The rear panel is also fixed to the bars with

screws.

The front unit contains all functions needed for the user com-

munication: keyboard, display and input BNCs. All other

electrical functions are on the main board. The rear panel has

no PCB. The connectors here are all soldered directly to the

main circuit board.

Block Diagram

Figure 4-7 contains a block diagram of the electrical functions

of the counter. They are divided among the main circuit board,

the display board, the rear panel and the optional prescaler

board. See the schematic diagrams in Chapter 9 for complete

information.

Most functions are placed on the main board:

– Input amplifiers with trigger level circuits

– Power supply

– Measurement logic

– Microcomputer circuitry

– GPIB interface

– USB interface

– External reference input

– External arming input

The rear panel unit is made of aluminum with a number of

mounted connectors, a fan and a power line inlet with filter.

Most connectors are soldered directly to the main board.

NOTE: Schematic diagrams in this chapter are simplified.

For complete information, see Chapter 9.

4-12 Block Diagram Description

Block Diagram Description 4-13

ON/OFF

RESET MICROPROCESSORARM 7

STD OSC

OPT OSC

100 MHzPLL

-FLASH 8 MB-SDRAM 32 MB

MEMORY

FAN

STDBYLED

KEYBOARD

LCD

TEMPSENSOR

USB

GPIB

GATE LED

TRIG LED A

TRIG LED B

INT REF OUT

INTERPOLATORS4 X

EXT CTRL IN

EXT REF IN

TRIG LVL

INPUTAMPLIFIERS

PRESCALER

MEASURING LOGIC(FPGA)

LVLCONV

LINEPWR

AC/DC

SEPARATE BOARD

+15 V -15 V+5 V

POWERSUPPLY

+15 V

+12 V

+5 V

-12 V

-5.2 V

-2.1 V

+3.3 V

+1.8 V

JTAGI C2

DISPLAY BOARD

SPI

SPI

C

A

B

OPTION

DISPLAY BOARD

**

*

*

*

* REAR PANEL CONNECTORS

BU

FF

ER

Figure 4-7 Block diagram of the '90'.

Hardware Functional Description

Front Unit

The front unit consists of a front piece in molded aluminum, a

silicon rubber keypad with conducting contact surfaces, a

graphic LCD with LED backlight, and a PCB having etched

gold-plated keyboard contacts and a dedicated LCD power

supply.

Display

The display is a 320*97 pixels graphical LCD with LED

backlight. The LCD controller is part of the processor, and it

sends data and control signals to the drivers in the LCD mod-

ule. Display ON is controlled via the I2C bus and the keyboard

IC. The LCD voltages are generated by a DC/DC converter.

Five different voltages are generated. A control signal from

the processor switches the converter ON/OFF and also sets

the contrast of the display.

The 4 LEDs on the display board are controlled from the mea-

suring logic and the ON/OFF circuit.

Keyboard

The PCB covers the back of the front unit. The keys are laid

out as a crosspoint switch matrix consisting of 25 regular push

buttons plus a special power button. When one of the buttons

is depressed, the dedicated keyboard IC U3 responds by send-

ing an interrupt to the processor. The processor scans the key-

board over the I2C bus to find out which button calls for atten-

tion. The power button differs from the others by having a

dual function. In Standby Mode it turns on the ON/OFF circuit

directly, but when the counter is ON, it is read as any other

button. Then the processor turns off the counter. This arrange-

ment is necessary since the processor is inactive in standby

mode.

Main Board

Input Amplifiers

Input amplifiers A and B are identical with >300 MHz band-

width. They are controlled by the processor with relays etc.

The analog input signal is transformed to a digital signal. The

output signals are LVPECL (+2.4 V and +1.2 V approxi-

mately) and fed to the measuring logic.

For a block diagram of the input amplifiers, see Figure 4-8.

� Impedance Selector

This stage selects 1 M� or 50 � input impedance with a relay.

In 50 � mode 11 resistors are used for dissipating the input

power, up to a maximum of 2.9 W (12 Vrms).

� Attenuator

This stage has two parts, a fixed preattenuator (approximate

attenuation ��) and a cascaded relay-operated ��/�� step

attenuator. The variable capacitors are used for adjusting the

frequency response of the attenuators.

� AC/DC

This stage selects AC or DC coupling with a relay.

� Limiter

The voltage limiter protects the impedance converter against

overvoltage. The �5 V applied to the input BNC is divided to

approximately �2.1 V by the attenuator. The limiter clamps

the voltage to approximately �2.8 V.

� Impedance Converter

Split-band technique is used for achieving good frequency re-

sponse over a wide range. The HF signal is fed via an

AC-coupled FET stage. The LF signal (bandwidth DC to ap-

proximately 10 kHz) goes via an operational amplifier. The

signals are added together at the source of the FET. The output

signal from the buffer stage (see below) is fed back to the op-

erational amplifier. A trimmer potentiometer is used for

equalizing the gain in the two signal paths (approximately

�0.9).

� Filter

A lowpass RC filter with an approximate cutoff frequency of

100 kHz can be switched in via a transistor.

� Buffer

Before the signal is fed to the Crossover Switch, it passes a

current-amplifying buffer stage that can drive the following

low impedance stages.


� Crossover Switch

This stage uses relays to direct the signal to the two compara-

tors. The following combinations are possible:

• IN A to COMP A and IN B to COMP B

• IN A to both COMP A and COMP B

• IN B to both COMP A and COMP B

� Comparator

The comparator converts the analog signal to a binary logic

signal, with ECL levels (-0.9 V and –1.7 V). The trigger point

is set by a voltage from the trigger level circuitry. Tempera-

ture-compensated circuitry generates the voltages that control

the hysteresis of the comparator. A trimmer potentiometer ad-

justs the hysteresis window.

� Trigger Level Generation

Two 12-bit DACs in a single IC generate the two trigger levels

for Channel A resp. Channel B. A 2.5 V DC reference IC sup-

plies the reference voltage to the DACs. The DACs are con-

trolled by the processor over the SPI bus. The �5 V dynamic

range at the BNC of the input amplifier is converted to ap-

proximately �2.1 V at the comparator. This range must be

covered by the DAC. The voltage step from the DAC is ap-

proximately 1.2 mV, corresponding to 2.9 mV per step at the

BNC. Closed Case Calibration (CCC) is used for adjusting

the trigger levels. A known reference level is applied to the

BNC and the processor finds out the appropriate setting of the

DAC to match the reference level.

� Logic Level Conversion

The signals from the comparators must be converted from

ECL levels to LVPECL levels. There are three converter cir-

cuits. One for Channel A , one for Channel B and one for the

Set-Reset channel. The two main channels are fed to a Set-Re-

set flip-flop to make one-channel measurements with variable

hysteresis possible. There is also a converter for the signal

from an optional prescaler. It has PECL levels (+4.1 V and

+3.4 V) that are converted to LVTTL levels (+2.4 V and 0 V).

Oscillator Circuits

The processor has an 11.2896 MHz crystal. An internal PLL

in the processor uses the signal to make the internal processor

clock, approximately 50.8 MHz. The USB IC has a 6 MHz

crystal to make an internal clock and the GPIB IC has a 40

MHz crystal to make an internal clock.

The measurement reference oscillator (timebase) for the

timer/counter is a 10 MHz crystal oscillator or an optional

oven-controlled crystal oscillator (OCXO). Only one of these

is mounted. The user can also select an external reference sig-

nal, connected to the External Reference Input BNC on the

rear panel.

The standard oscillator consists of an inverter and a crystal.

The processor controls the frequency of the oscillator with a

PWM signal. The PWM signal is filtered to a DC level that

controls the capacitance of a capacitance diode. The varying

capacitance changes the frequency of the oscillator. The stan-

dard oscillator is adjusted with Closed Case Calibration. Ap-

ply a 10 MHz reference signal to Input A. The processor will

find the correct PWM signal to make the internal reference

frequency equal to the external reference frequency.

The optional oven-controlled oscillator is a complete oscilla-

tor in a small hermetic metal box. An internal accurate DC

voltage is available for use as a reference for a 12-bit DAC.

The filtered output voltage from the DAC sets the frequency

of the oven oscillator. The processor controls the DAC via the

SPI bus. The same Closed Case Calibration as for the stan-

dard oscillator is used. The oven oscillator is kept warm if the

line power is connected to the timer/counter, even if it is

switched off (in standby mode).


AC/DCCOUPLATTIMP LIMITER

- +

IMPCONV LP FILTER BUFFER

CROSSOVERSWITCH

- +

AC/DCCOUPL

ATTIMP LIMITER IMPCONV

LP FILTER BUFFER

LVL SHIFT

ECL

LVPECL

LVL SHIFT

ECL

LVPECL

S/RFLIP-FLOP

ECL

LVPECL

A

B

TRGLVL A

TRGLVL B

OPTIONAL PRESCALER

PECL

LVTTL

C

TO

ME

AS

UR

ING

LO

GIC

Figure 4-8 Input amplifier block diagram.

The 10 MHz reference signal is multiplied in a PLL to

100 MHz. The 100 MHz signal is used in the measuring logic

as a reference. The processor controls the PLL IC with the SPI

bus. A 100 MHz LC oscillator is used as the controlled ele-

ment where part of the C is a variable capacitance diode. Its

capacitance is controlled with a DC voltage from the PLL IC,

thus changing the frequency. The 10 MHz reference signal is

applied to the PLL IC as its reference and the 100 MHz output

frequency is exactly 10 times the reference frequency.


A 1, 2, 5 or 10 MHz reference signal can be connected to the

rear panel BNC. After amplification in an operational ampli-

fier narrow pulses are made in two D flip-flops, one narrow

pulse for each input cycle. These pulses are fed to the 10 MHz

crystal filter. After the filter a reconstructed 10 MHz signal is

available. A variable capacitor is used for adjusting the filter.


The selected 10 MHz reference signal (standard/oven oscilla-

tor or external reference) is available on the rear panel. The 10

MHz reference signal that is used internally by the dedicated

counter circuit (FPGA) logic is also sent to an output pin on

the FPGA. It is filtered to a sine wave and amplified in an out-

put buffer stage having 50 � drive capability.

Measuring Logic

The measuring logic consists of an FPGA, four interpolators

and an external control input on the rear panel. The FPGA

core uses +1.8 V supply voltage and the I/Os use +3.3 V sup-

ply voltage.

The FPGA is controlled by the processor over a 32-bit micro-

processor bus. Input signals (A, B, prescaler etc) and refer-

ence clock (internal 10 MHz oscillator or external reference)

are selected inside the FPGA. The logic for all measuring

functions and support functions (trigger indicators, start de-

lay, pacing etc) are inside the FPGA. A 100 MHz reference

clock is generated by a PLL circuit giving 10 ns basic mea-

surement resolution. To increase the measurement resolution

further, external interpolators are used. The measuring logic

also controls three LEDs on the display board; a GATE LED

indicating that a measurement is in progress, and two trigger

indicators telling that the comparators are triggering on the in-

put signals.

The four external interpolators are identical. Depending on

the selected measurement function 0, 2, 3 or 4 interpolators

are used. A pulse representing the time from an event on the

input to the following rising edge of the 100 MHz reference is

fed to the interpolator. During the pulse time a constant cur-

rent is charging a capacitor. The voltage on the capacitor is

measured with a 10-bit ADC. The capacitor is discharged and

the interpolator is ready for a new measurement.

An external control input BNC is located on the rear panel. A

signal applied to this connector can be used for controlling the

start of a measurement, for instance. A comparator converts

the analog input signal to a logic signal.

Processor Circuits

The processor is a Sharp LH79524. It contains an ARM7 core

and peripherals. It runs on a 50.8 MHz internal clock. The

processor that uses 3.3 V supply voltage has an internal circuit

that generates 1.8 V for the core. The I/Os use 3.3 V.

The 32-bit microprocessor bus communicates with a 16-bit

8 MByte flash memory and a 32-bit 32 MByte SDRAM. The

flash memory contains the program, data for loading the

FPGA, and stored data (calibration data etc.). At power-up the

code is copied from the flash to the SDRAM for faster execu-

tion.

Buffers isolate the memory part of the microprocessor bus

from the rest of the bus. Outside the buffers are the FPGA, the

GPIB interface and the USB interface.

The processor has a JTAG interface with a connector on the

circuit board.

A reset IC monitors the two main logic supply voltages,

+3.3 V and + 1.8 V. If a supply voltage fails, the processor will

be reset.

Two other buses are also used, an SPI bus and an I2C bus. The

SPI bus is an output only bus and the processor controls the

100 MHz PLL, the trigger level DACs, and the DAC for the

optional oven oscillator. The I2C bus is bidirectional and used

for communication with the temperature measurement IC, the

display board (keyboard + LCD), the prescaler (optional), and

the relays and filters in the input amplifier.

The temperature reading over the I2C bus is used for control-

ling the fan speed. A PWM output is utilized. The signal is fil-

tered and the resulting DC voltage controls the fan.

Another PWM output is used for controlling the frequency of

the standard crystal oscillator.

The LCD controller is a peripheral inside the processor. This

controller sends signals and data to the driver circuits in the

LCD on the display board.

The processor also controls the OFF switch. Only a signal

from the processor can switch off the power. The OFF button

on the front panel is read by the processor. ON is handled

without the processor, since it cannot respond to external

stimulus in standby mode.

Power Supply

This timer/counter has no primary power switch. If connected

to line power there are live parts inside the cabinet, and some

supply voltages are present on the main circuit board, even if

the secondary power switch on the front panel has been turned

off (standby mode).


A semi-protected AC/DC module is placed on spacers over

the main circuit board. It delivers three regulated DC voltages

to the counter, + 15 V, + 5 V and –15 V. When the counter is

connected to line power, these voltages are always present.

There is a + 5 V trimmer potentiometer on the AC/DC mod-

ule.

The ON/OFF circuit is active as soon as the counter is con-

nected to line power. The instrument automatically powers up

when line power is applied. Only the processor can switch the

circuit to OFF state (standby mode). Then only the power but-

ton on the front panel can switch the instrument to ON. Once

connected to line power and in OFF state (standby mode),

supply voltage +12 VU is distributed to the oven oscillator to

keep it warm. In standby mode a red LED is lit on the front

panel. To keep the AC/DC module stable in this mode, a

dummy load is connected to draw a quiescent current of 0.1 A

at +5 V.

The three main voltages are +15 V, +5 V and –15 V from the

AC/DC module. All other supply voltages are generated from

them and are, except for +12 VU to the oven oscillator,

switched off in standby mode.

Linear regulators are used for generating stable voltages with

low noise and without spikes. Some of them have a resistor

net at the input to dissipate part of the heat generated. Thus the

regulator itself will run cooler. The following voltages are

generated in this way:

+3.3 VA from +5 VU

-5.2 VA from -15 VU

-5.2 VI from -12 VA

-2.1 V from -12 VA

-12 VA from -15 VU

+12 VA from +15 VU

+12 VU from + 15 VU, to oven oscillator, not switched off in

standby mode

For digital and general use supply voltages are generated by

DC/DC converters:

+3.3 VD from +5 VU

+5 VD from +5 VU via a switch IC

+15 VD from +15 VU via a switch transistor

+1.8 V from +5 VU

Communication Interfaces

Both a GPIB and a USB interface are available for communi-

cation with external bus controllers. The connectors are lo-

cated on the rear panel.

The GPIB consists of an IC. Only 8 bits of the 32-bit micro-

processor bus is used. Due to different supply voltages for the

processor (+3.3 V) and the GPIB circuit (+5 V), a buffer IC is

used for isolating the +5 V GPIB IC from the processor bus. A

40 MHz crystal is used for generating a local clock.

The USB consists of an IC. It communicates with the proces-

sor over the 32-bit microprocessor bus, but only 16 bits are

used. A 6 MHz crystal is used for generating a local clock.

Rear Panel Unit

The rear panel is made of aluminum. A number of connectors

mounted on this unit are accessible to the user, see Figure 4-9.

I/O:

– GPIB communication connector.

– USB communication connector

INPUTS:

– External reference (BNC)

– External arming (BNC)

– Power supply inlet including EMI filter

– Optional main inputs replacing corresponding front

panel inputs


!

!

!

!

!

!

10 MHz OUT1Vrms IN 50W

EXT REFFREQ INPUT

EXT ARMINPUT E

INPUT A INPUT B INPUT C

GPIB IEEE 488USB

191125

Figure 4-9 Rear panel, PM6690.

OUTPUTS:

– Internal reference 10 MHz (BNC)

Prescaler Circuit Board

There are several different optional prescalers available with

different frequency ranges. The prescaler is located on a sepa-

rate circuit board that is connected to the main circuit board

with a PCB connector.

A typical prescaler consists of a limiter, an amplifier, a fre-

quency divider, and a detector. The limiter and the amplifier

condition the input signal so that the amplitude to the divider

is constant. The divider scales the input signal so that it can be

handled by the measuring logic on the main circuit board. A

detector switches off the output signal from the divider if the

input level is too low for the divider to work correctly (divid-

ers often oscillate without input signal).

Test Routines

Built-in Test Routines

The test routines are those accessible via the USER OPT key.

– Press USER OPT � Test � Test Mode

– Choose one of the five alternatives:

1. All - Perform the four basic tests below in sequence

2. Memory - Test RAM and ROM

3. Logic - Test measuring logic circuits

4. Display - Test the graphic LCD display

5. Interface - Test the two standard interfaces, GPIB and

USB

Power-On Tests

Certain tests are automatically performed at power-up. Errors,

if any, are reported on the display.


LimiterAmplifier

1Amplifier

2&3Amplifier

4&5

AGC1 AGC2

Voltageregulator

Dividers

Detector

Not C

Test go

Input

Figure 4-10 Typical prescaler option, block diagram

Chapter 5

Corrective &

Preventive

Maintenance

Introduction

This chapter contains information about measures to be taken

for keeping the instrument in operative condition, or in other

words, what you can do to maintain the measurement accu-

racy, improve certain characteristics and prevent a break-

down.

Traditional troubleshooting is described in Chapter 6 - Repair.

Calibration

The single most important factor for maintaining the high per-

formance of your instrument is calibration on a regular basis.

A timer/counter is mainly used for time/frequency-related

measurements, so knowing the characteristics of your

timebase reference is vital to reliable results.

Scheduled calibration of the built-in timebase reference is

highly recommended in applications where external, more ac-

curate, frequency references are not available. Suitable cali-

bration intervals depend on the chosen timebase option and

the acceptable inaccuracy, but once a year is often a good

starting point.

The '90' has also limited voltage measurement capabilities,

and when these features are utilized, the voltage reference

should also be calibrated, preferably at the same time as the

frequency reference.

Both frequency and voltage calibration can be performed

without removing the cover, and the procedures are described

in Chapter 7, where you can also find information about cal-

culating calibration intervals for different timebase refer-

ences.

Instructions for FirmwareUpgrade

The firmware is stored in a FLASH PROM, so it is possible to

upgrade via one of the standard instrument interfaces (GPIB

or USB) without opening the case. USB is standard on most

PCs, but GPIB communication requires a special controller

board and dedicated SW from NI or CEC. A 'readme.txt' file

contains information not covered by these instructions. The

relevant files are available through the service organization.

– Make sure the National Instruments NI-VISA 3.2 or

later is installed with USB support, even though you are

going to use the GPIB interface for the upgrade.

– Establish a communication link between your PC and

the instrument over GPIB or USB by using a dedicated

application program, for instance NIMax from National

Instruments. No other instruments should be connected

to the same bus. Firmware upgrade over USB works

with firmware version V1.07 or above installed in the

instrument.

– Send *IDN? to the instrument and watch the response.

If the ID string is OK you can exit the communication

program and start the upgrading procedure.

– Download the latest firmware file (example name:

CNT_90_109_csl.hex) and the latest loader SW (exam-

ple name: Loader.exe) to a common directory on your

PC.

– Start the Loader.exe program.

– Press "Load" to open the firmware file. Follow the in-

structions on screen. The update is automatic, and pro-

cess information can be seen on the PC screen as well as

on the instrument display. Do not interrupt the process

too early as it may take between a few minutes up to an

hour, mostly depending on different possible hardware

combinations. A thermometer indicator on the PC moni-

tor gives status reports. The crucial part of the process is

when the message "FLASH updating (uninterruptible)"

is displayed. Do not under any circumstances interrupt

the loader while this message is visible. If the process

fails during this part, it may be impossible to control the

instrument from the bus as well as from the front panel.

Then you have to load new firmware over the JTAG

connection to the processor, a method that only the fac-

tory can apply.

– After a successful update, the counter is reset (if previ-

ous firmware is V1.01 and above). The message "Firm-

ware update complete. Loader is trying to connect to the

counter again" is displayed on the PC monitor. Confirm

by pressing OK.

– Press OK again when the message "Counter found" is

displayed.

– Press EXIT to leave the loader program.

– If the counter is not reset by the Loader program, turn

the counter off and on when the update is complete.

NOTE 1: With some firmware revisions and GPIB cards the

Loader gives an error message:

"Counter I/O error. Loader shutting down" after the

successful update. This is a loader fault and does not

harm the upgrade process.

– To remove the SRQ indicator on the front panel, which

might be present in such cases, start a GPIB communi-

cation tool and send the command "*PSC 1" and run a

full power cycle (OFF/ON).

NOTE 2: Some firmware revisions need a full power cycle to

resume proper operation. If the instrument does not

measure correctly after firmware upgrade, turn the in-

strument OFF and ON to initialize the hardware prop-

erly.

– After the update, enter the calibration menu (password

62951413) and run "Calibrate internals".

5-2 Introduction

Utility Program

Purpose

This service tool is used for configuring the timer/counter,

whenever information stored in firmware about serial number

and oscillator type etc. has been lost, for example after re-

placement of the main PCB. It is also used for defining a new

factory calibration.

Availability and System Requirements

The utility program can be obtained from the manufacturer or

your local service organization free of charge and can be run

on any PC with Windows 2K or XP equipped with a GPIB in-

terface from National Instruments. It is distributed as a com-

pressed file called PM6690.zip containing all the necessary

installation and data files including a readme.txt file with ad-

ditional information.

Installation

– Unpack the zip file in an empty directory by using

Winzip.

– Delete the original zip file if you want to save memory

space.

– Run the setup.exe program and follow the on-screen in-

structions.

Running the Application

After installation you can start the utility application by run-

ning the program PM6690 Utility.exe from the chosen direc-

tory. Refer to the readme.txt file for closer information on top-

ics not covered by the application user interface.

Fan Replacement

This instrument is equipped with a speed-controlled fan as

standard to sustain the specified operating temperature range.

If your instrument is operating in a 24 h/day system, you

should replace the fan every second year to maintain maxi-

mum reliability. For part-time applications and where low am-

bient temperatures prevail, an extended service interval is ac-

ceptable.

Follow the instructions on page 3-3 to replace the fan.

Other Important Information

There are no batteries of any kind in this instrument, so in gen-

eral it is only necessary to remove the cover when the fan is to

be replaced, or when a real fault calls for traditional trouble-

shooting.

Utility Program 5-3


5-4 Other Important Information

Chapter 6

Repair


6-2

Version A





Version A 6-3

Troubleshooting

General

The '90' is a highly integrated Timer/Counter in which a dedi-

cated FPGA counter circuit handles the signal processing, and

a microcontroller does the postprocessing and supervising

jobs. A number of additional functional units support these

basic tasks, for instance power supply, reference oscillator,

wideband input amplifiers, comparators, memory (RAM &

ROM), digital/analog converters, etc.

The units are treated from a troubleshooting point of view in

this chapter, which means that units described earlier should

be considered faultless before troubleshooting on units de-

scribed later.

WARNING: Live parts and accessible termi-

nals which can be dangerous to life are

always exposed inside the unit when it is

connected to the line power. Use extreme

caution when handling, testing or adjust-

ing the counter.

Where to Start

After reading the safety instructions, continue with this

chapter for troubleshooting and repair instructions. When you

have fixed the instrument, always do the Safety Inspection

and Test after Repair, as described later in this Chapter. Then

do the checks in Chapter 2, Performance Check. Recalibrate if

required by following the adjustment instructions in Chapter

7, Calibration Adjustments.

Logic Levels

The '90' contains logic of different families. The levels of the

standard families are listed in Table 6-1. In addition to these

families there is also low-level logic requiring lower supply

voltages, e.g. +3.3 V, +2.5 V and +1.8 V.

Required Test Equipment

To be able to test the instrument properly using this manual

you will need the equipment listed in Table 2-1. The list con-

tains the critical parameter specifications.

Operating Conditions

Power voltage must be between 90 VAC and 260 VAC. The in-

strument adapts automatically to the applied voltage.

Basic Functional Units

These are the units that are described in this chapter with ref-

erence to the page where the section starts:

• Power Supply (p. 6-4)

• Input Amplifiers (p. 6-8)

• Timebase Reference Circuits (p. 6-12)

• Prescalers (p.6-15)

• Microprocessor & Memories (p. 6-15)

• Microprocessor Bus & Interfaces (p. 6-21)

• Measurement Logic (p. 6-27)

Power Supply

The DC voltages needed in the instrument are generated from

the three main voltages of the AC/DC module.

The instrument has only a secondary power switch, i.e. the

AC/DC module is always operating if line power is applied.

The three output DC voltages (+5 V, +15 V, -15 V) from the

module are present on the main circuit board. When switched

off, the instrument is in the standby mode. In this mode only

6-4 Troubleshooting

Positive

ECL

Negative

ECL

CMOS TTL

Supply voltage +5 V -5 V +5 V +5 V

Signal ground 0 V 0 V 0 V 0 V

Input voltage

High, VIH >+3.9 V >-1.1 V >+4 V >+2 V

Low, VIL <+3.5 V <-1.5 V <+1 V <+0.8 V

Output voltage

High, VOH >+4 V >-1 V >+4.9 V >+2.7 V

Low, VOL <+3.3 V <-1.7 V <+0.05 V <+0.4 V

Bias ref. voltage,

VBB+3.7 V -1.3 V - -

Table 6-1 Logic levels.

the ON/OFF circuitry and the optional oven oscillator are

powered.

The AC/DC module should not be repaired. Not even the

built-in fuse should be replaced. Built-in circuits protect

against external overloads, so a blown fuse indicates that a se-

vere internal fault has occurred. Replace the complete module

instead.

Test the AC/DC module by measuring the three DC voltages

in TP9 (+5.1 ± 0.05 V), TP21 (-15 ± 1 V) and TP26

(+15 ± 1 V) on the main circuit board. See Figure 6-2. Note

that there is a +5 V trimmer on the module. If the +5 V is not

correct, disconnect the cable to J17 on the main circuit board.

Put a 47 � 1 W resistor on the connector according to Fig-

ure 6-2. Measure on the connector +5.1 ± 0.05 V, +15 ± 1 V

and -15 ± 1 V.

It can be difficult to measure the resistance in the supply con-

nector J17 on the main circuit board, because charges are kept

by capacitors some time after line power is removed. Remove

the cable from the AC/DC module. The resistance between

+5 V and ground should be approximately 700 �. See Fig-

ure 6-2. In a timer/counter with all capacitors uncharged, +15

V and -15 V should be at least M�.

Another way to test J17 is to connect 3 DC voltages from a

separate bench power supply directly to J17 (suitable connec-

tor MOLEX 09-91-0600). See Figure 6-2. The currents drawn

from the different supply voltages depend on options in-

stalled. Before making this measurement, you should remove

any prescaler option.

A timer/counter without options gives the following typical

results:

+5 V 0.7 A

+15 V 0.25 A

- 15 V 0.4 A

The oven oscillator increases the + 15 V current between

0.35 A (cold) and 0.1 A (warm).

A block diagram of the secondary power supply is shown in

Figure 6-1. All secondary voltages are switched off in standby

mode except +12 VU for the optional oven oscillator.

The ON/OFF circuitry controls the ON and OFF of the sec-

ondary voltages. Its own supply voltage is always ON, as long

as the instrument is connected to line power. See Figure 6-6.

Troubleshooting 6-5

X1X2 +2.5 VU117

DC/DC

+1.8 VU118

DC/DC

+3.3 VDU128

DC/DC

+5 VDU127

SWITCH

X14

X11

+3.3 VAU126

LINEAR

X12DUMMYLOAD

Q56, Q57

ON/OFFLOGIC

Q46, Q47,Q58, U29

X22

X24

+12 VAU129

LINEAR

+15 VDQ49, Q50SWITCH

X15

+12 VUU130

LINEAR

X17FAN

Q48, U30

+15 VU

+5 VU

J28

X16

�PROC.

X10

-12 VAU123

LINEAR

-5.2 VAU124

LINEAR

X8

X62

X25

-15 VU

J17:2,3

J17:1

J17:6

FR

OM

AC

/DC

MO

DU

LE

+5 VA X13

�P

RO

C.

KE

Y

-5.2 VIQ51, U35LINEAR

-2.1 VQ17, U6LINEAR

Figure 6-1 Power distribution

47 �

redbrownbrownblackblackblue

AC

/DC

MO

DU

LE

CA

BL

EA

SS

EM

BLY

PCB PIN CONNECTOR J17

X26

X9

X21

+15 V+5 V+5 VGNDGND-15 V

DUMMY LOAD

16

Figure 6-2 Dummy load connection.

On connection of line power, R478 and C389 keep the

RESETN input of the flip-flop U29 low. This sets the QN out-

put of U29 high. Via Q47 (output signal low) and Q58 (output

signal high) the secondary power supply will be set in ON

mode. To switch to the standby mode, the processor sets the

SETN input of U29 low. This results in the QN output being

low and the secondary power supply being set to standby

mode via Q47 (output signal high) and Q58 (output signal

low). In standby mode a bleeder circuit on +5 VU is

connected. It draws approximately 100 mA to stabilize the

AC/DC module. The standby LED on the front panel is

switched on. To switch to ON mode from standby mode, a

negative pulse, generated by pressing the ON/OFF key on the

front panel, is connected to the RESETN input of U29.

Linear regulators are used for some voltages to ensure mini-

mum noise. Check the TPs below:

TP12: +3.3 VA (from +5 VU)

TP8: -5.2 VA (from -15 VU)

TP10: -12 VA (from -15 VU)

TP62: -5.2 VI (from -12 VA)

TP25: -2.1 V (from -12 VA)

TP16: +12 VA (from +15 VD)

TP17: +12 VU (from +15 VU) (to oven oscillator, not

switched off in standby mode)

For digital and general use some voltages are generated by

DC/DC converters. Check the following TPs:

TP14: +3.3 VD (from +5 VU)

TP1: +2.5 V (from +5 VU)

TP2: +1.8 V (from +5 VU)

Some voltages derived directly from the AC/DC module are

used as secondary supply voltages without further regulation,

and they have semiconductor switches in series to make it

possible to shut them off in standby mode. Check the TPs be-

low:

TP15: +15 VD (from +15 VU)

TP11: +5 VD (from +5 VU)

TP13: +5 VA (from +5 VD)

These 13 secondary voltages are used all over the instrument.

All secondary supply voltage lines are segmented into

branches with ferrite beads. See the schematics. This makes it

easier to isolate short circuits by removing ferrite beads tem-

porarily.

6-6 Troubleshooting

Figure 6-3 PCB1 survey

See Fig. 6-4 See Fig. 6-5

Fan Control

The fan is connected to +15 VU over a speed control circuit. It

is only ON if a control signal from the processor is present.

The first 8 minutes after power-up the fan will run at a fixed

speed, fed with +8.3 V. After that the fan is temperature con-

trolled. The processor reads the temperature from U39 via the

I2C bus. Depending on the temperature, the fan is fed with a

DC voltage between 8 and 13.5 V. The processor uses a PWM

signal that is filtered to control the fan.

Troubleshooting 6-7

Figure 6-4 Important power supply locations #1.


Input Amplifiers

The input amplifiers for Channel A and Channel B are identi-

cal. A trigger level circuit belongs to each amplifier. The trig-

ger level is adjusted to match the hardware during the voltage

calibration procedure, see Chapter 7. Note that the input am-

plifiers must be adjusted according to Chapter 7 (step re-

sponse, sensitivity etc). The description refers to both chan-

nels (Channel B information within parentheses).

Recall the timer/counter default setting. Select the measure-

ment function Time A-B. Set both input channels to DC, Man

Trig = 0.000 V. No signals connected.

The RF shield must be removed before measuring on the input

amplifiers. It is soldered to two of the shield clips. Don't forget

to put the shield back afterwards and secure it by resoldering.

First measure some DC values. U3 pin 9 (pin 13) should be

near 0.000 V. The same applies to the trigger level, U3 pin 10

(pin 12). The voltage to ground at the point where R171

(R243) and R172 (R244) are connected should be approxi-

mately -0.8 V.

Connect a 1 kHz square wave with amplitude 1 Vpp in 1 M� to

Input A (Input B). Measure at the following points (see also

figure cc) and use the ground pads that are distributed over the

PC board:

Test Points Approximate Voltage

R140 to R141 (R212 to R213) 1.00 Vpp

R156 to C109 (R229 to C140) 0.40 Vpp

U1 pin 2 (U2 pin 2) 0.20 Vpp

U1 pin 3 (U2 pin 3) 0.20 Vpp

U1 pin 6 (U2 pin 6) -1.00 Vdc

R151 to R157 (R223 to R230) 0.40 Vpp

U3 pin 9 (U3 pin 13) 0.40 Vpp

R309 and R314 (R313 and R315) ECL levels -1.0 V and -1.7 V

R301 both sides (R304 both sides) LVPECL levels 1.6 V and

2.6 V

Test the trigger level by manually setting the following trigger

levels. Check the voltage at X6 (X7) and U3 pin 10 (pin 12).

Set Level Approximate Voltage

+1 V +0.41 V

+4 V +1.65 V

-4 V -1.65 V

-1 V -0.41 V

Set the timer/counter to default. Select the measuring function

single period. Connect the 1 kHz square wave to channel A

(B). Measure with oscilloscope at X6 (X7). See figure dd for a

typical signal.

If any repair work has been done on the input amplifiers, both

adjustment and voltage calibration must be performed after-

wards. If any repair work has been done on the trigger level

circuits, at least voltage calibration must be performed after-

wards. See Chapter 7.

6-8 Troubleshooting

+5VU

+5VU

+5VU

OFFCTRL

ONCTRL

ON

OFF

C389100NFC389100NF

R593

1K

R593

1K

R592

1K

R592

1K

R44910KR44910K

X51X51

Q58BC847BQ58BC847B

X22X22

X50X50

VC

C1

4

GN

D7

U29CLVC74AU29CLVC74A

R479220R479220

C197100NFC197100NF

R466

1K

R466

1KX24X24

Q47BC847BQ47BC847B

R472

47

R472

47

X23X23

R4531KR4531K

1MR4781MR478

R584

47

R584

47

D2

CLK3

S4

R1

Q5

Q6

U29A

LVC74A

U29A

LVC74A

R480470R480470

Figure 6-6 ON/OFF logic

ON H

OFF L

ON H

OFF L

ON L

OFF H

A & B are control

signals to PSU

switches and

dummy load.POWER-ON RESET CKT

A

B

Troubleshooting 6-9

Figure 6-7 Test points for troubleshooting the input amplifiers.

Figure 6-8 Oscillogram showing the signal at the interconnection of R140 (R212) and R141 (R213).

6-10 Troubleshooting

Figure 6-9 Oscillogram showing the signal at the interconnection of R156 (R229) and C109 (C140).

Figure 6-10 Oscillogram showing the signal at U3:9 (U3:13).

Troubleshooting 6-11


Figure 6-12 Oscillogram showing the signal at X6, Period Single A.

Timebase ReferenceCircuits

The measurement reference is either a 10 MHz signal from an

internal oscillator (standard crystal oscillator or optional

oven-controlled crystal oscillator) on the main circuit board or

a signal from the external reference input that accepts the fol-

lowing frequencies: 1, 5 and 10 MHz. A frequency multiplier

transforms the external signal to 10 MHz. The selected 10

MHz reference is always available at the internal reference

output. See Figure 6-14.

The main PCB is prepared for both types of internal timebase,

but only one of them is mounted. The selection is made at the

factory. You have to run the utility program (see page 5-3), if

the oscillator is to be changed. Closed Case Calibration is

used for adjusting the oscillator. On power-up the processor

outputs the setting that is stored as the correct one for

10.000000 MHz. It will take some time for the oven oscillator

to reach the correct frequency. A calibration must be

performed if the adjusting voltage should move during opera-

tion, not only on power-up.

The selection between the on board oscillator and the external

reference is made in the FPGA. The 10 MHz signal from the

other source is switched off.

Connect a 10 MHz signal to the external reference input. Use

the SETTINGS menu to alternate between internal and exter-

nal oscillator. Check for correct signals at U4:6 for the stan-

dard oscillator, at U4:8 for ther oven oscillator and at U33:3

for the external reference. Check also that the selected

timebase reference is present at the internal reference output

BNC connector on the rear panel.

Standard Oscillator

See Figure 6-14 and Figure 6-16.

The control signal (U4:1) must be high. The frequency is con-

trolled by a PWM signal from the processor. After filtering

the resulting DC voltage changes the capacitance of D24. A

DC level between 0 V and +3.3 V at R289 should somewhere

within the adjustment range give 10.000000 MHz. Check the

output signal and frequency at U4:6.

If the standard oscillator is repaired, a new calibration must be

performed. See Chapter 7. A new factory calibration by

means of the utility program should also be performed.

Optional Oven Oscillator

See Figure 6-14, Figure 6-15 and Figure 6-16.

The oven oscillator is a self-contained unit, enclosed in a

metal box and soldered to the main circuit board. It cannot be

repaired and must be replaced with a new oscillator if it is

faulty.

Let the oven oscillator warm up 10 minutes before starting

measurements. The 12 V supply voltage can be checked at


Figure 6-13 Oscillogram showing the signal at X7, Period Single B.

X17. The oven oscillator should be powered also in standby

mode.

The oven oscillator outputs a 10 MHz signal if powered. It

should be 1.3 Vpp measured at R282. If not selected, a gate

(U4) stops the signal, the control signal (U4:9) is then low.

The frequency is controlled by a DAC (U5). Its reference

voltage is derived from the oscillator, approximately +5 V

(C174). The polarity of the reference voltage is reversed in an

op amp (U6), and the voltage at U5:1 should be -5 V. The out-

put voltage from the DAC should be between 0 and Vref, mea-

sured at R281. The DAC is controlled by the processor via the

SPI bus.

The frequency adjustment range should be wide enough to al-

low for more than 10 years of oscillator aging. The oscillator

must be replaced if the normal control voltage range cannot

make the oscillator output 10.000000 MHz.

As a last resort to exclude external causes of malfunction,

desolder the oven oscillator from the main circuit board.

Place it upside down and connect +12 V and ground accord-

ing to Figure x. A cold oven oscillator draws approximately

0.30 - 0.35 A. During heating the current consumption varies.

After 10 minutes it should stabilize on less than 0.1 A. The

output Vref should be approximately +5 V and the 10 MHz

sinewave output signal should have an amplitude of more

than 2.5 Vpp measured with a 1 M�, 10x probe. The control

input has an internal bias to keep the output frequency in the

middle of the range. Adjust the control voltage between 0 V

and +5 V and check the output frequency range with a fre-

quency counter. The minimum trimming range should be

±5 Hz. 10.000000 MHz must be reached somewhere between

0 V and +5 V.

If the oven oscillator circuitry is repaired, a new calibration

must be performed. See Chapter 7. A new factory calibration

by means of the utility program should also be performed.



The input signal is amplified in U31. The output signal from

the amplifier should be a square wave with logic levels, repro-

ducing the timing characteristics of the input signal. Check

the signal at U32:11. U32 generates a short pulse (approxi-

mately 40 ns) for each input cycle, check at U32:9. These

pulses generate a broad spectrum of harmonics, and the

following high-Q 10 MHz crystal filter allows only a 10 MHz

sinewave to pass. Measure at X19. Note that the trimmer

C442 is used for maximizing the amplitude at X19. Check that

the amplitude is not less than 1 Vpp. If external reference is not

selected, the gate U33 stops the 10 MHz signal. The control

signal on U33:1 is then low.

100 MHz Multiplier


100 MHz is used in the measuring logic, mainly as a reference

clock, but also for other purposes. A PLL is used for multi-

plying the 10 MHz reference to 100 MHz. On power-up the

processor sets up the PLL IC (U9) via the SPI bus. An output

signal, PLL LOCK, tells the processor if the loop is locked

(high level). A VCO, consisting of an inverter (U47) and an

LC circuit in the feedback loop, is controlled by the PLL IC.

The DC voltage from U9:2 is filtered and controls a capaci-

tance diode. The VCO frequency changes with the capaci-

tance. The loop can handle the switching of 10 MHz refer-

ence, from internal to external and vice versa. There is no

need for a new setup. If external reference is selected and no

such signal is connected to the instrument, the PLL will be un-


FPGA

100 MHzPLL

EXT REFIN

INT REFOUT

STDOSC

OVENOSC

U4 U4-U7

10 MHz

U11

ON/OFF

100 MHzPLL

LOCK

ON/OFF

�P/SPI

�P

�P/SPI

U41, Q53, Q54

U31, U32,U33, Q55

U9, U47, U48

Figure 6-14 Timebase reference system.

3

2

1 5

4+12 V

Vref

Vcontrol GND

10 MHzOUT

Figure 6-15 Oven oscillator pinning (seen from bottom side).


Figure 6-16 Important locations in the internal timebase reference circuits.

Figure 6-17 Important locations in the external timebase reference circuits.

locked, and the VCO will go to one of the extremes. The typi-

cal range of the VCO is 95 to 105 MHz, thus giving an error of

typically 5 % in the measuring results.

Check the loop voltage (DC) at R272. It should be 1.6 - 2.2 V.

Check the 100 MHz signal at U48:4. It should be locked to the

incoming 10 MHz at U9:8. Check the lock condition with a

2-channel oscilloscope. Trigger on the 10 MHz channel. Then

the signal on the other channel shall be fixed, i.e. not moving

along the time axis. Check the PLL LOCK signal at U9:14

(lock is high).

Prescalers

The optional prescalers are not to be repaired. The faulty unit

should be sent to the factory, and an exchange unit will be

returned.

The best way to isolate the fault is to use another, functioning,

timer/counter with the same prescaler. Interchange the

prescalers and see if the problem follows the prescaler or the

timer/counter.

First measure with Channels A and B and check that the result

is OK. Select the function Frequency C. Connect a signal ac-

cording to Table 6-2 to Input C. Check the following pins on

the prescaler connector J15 on the main circuit board.

Pin 1 +5 V supply

Pin 5 +12 V supply

Pin 7 ON/OFF, ON is 0 V

Pin 11 test signal, should be 0 V

Pin 12 code 0, see Table 6-2



Pin 4 prescaler output signal, PECL levels (+4.1 V and

+3.4 V)

Measure with oscilloscope and probe at pin 4. The output fre-

quency should be the input frequency divided by the factor in

the table. Check with a frequency counter.

Note: The 3 GHz option has a sensitivity trimmer. See page

7-14 for information on how to adjust it.

Microprocessor & Memories

Startup Process

The processor in this instrument is a 32-bit ARM7TDMI. It is

housed in an IC (U13) together with peripheral units (SRAM,

timers, I2C bus interface, SPI bus interface, LCD controller

etc). The complete IC is a Triscend design and of type A7S20.

A separate memory bus on the processor is connected to one

16-bit Flash PROM (U17) and two 16-bit SDRAMs (U16 and

U15). The two SDRAMs are connected to form a 32-bit wide

memory.

A Reset IC (U116) monitors +3.3 VD, +2.5 V and +1.8V. The

reset signal is active low and kept low for approximately 160

to 180 ms after the voltages are OK. Measure at X33. The

ramp-up time for +3.3 VD is approximately 2 ms, for 2.5 V

approximately 4 ms and for 1.8 V approximately 3 ms.

The rising edge of the reset signal marks the start of the boot

sequence. All I/Os on the processor are set high with a weak

(high-ohmic) pull-up. The fan will run at full speed (R492).

The memory controller in the processor is set up. The proces-

sor reads in the Flash PROM for the initialization data at cer-

tain addresses. Check CE0 at U13 pin 16. When the data is

found, the processor loads it inside the processor IC. The I/Os

will be set up. The fan will stop running because the pin is set

low. The 32 kHz oscillator will start running (check at R357)

and an internal PLL will generate 30 MHz internal and exter-

nal clock, check X29.

After the initialization the processor starts executing code

from address 0 in the Flash PROM. The program copies the

code from the Flash PROM to the SDRAM. When done it

starts executing from the SDRAM. Check SDCE0 at U13:26.

The Flash is not used for executing code after this, only occa-

sionally for storing data that should be non-volatile.

See Figure 6-21 to Figure 6-23 for a survey of a typical instru-

ment startup.

The LCD is switched on. The LCD controller in the processor

generates the control signals for the LCD. See Figure 6-24 to

Figure 6-29. Note the different timing for the signals. The I2C

bus is used for switching the LCD on. The ON signal can be

checked at R34 on the display board. It should be high. The

LCD voltages must also be switched on. It is done by a control

signal from the processor. Check the signal at R33 on the dis-

play board. It should be high. Negative pulses on this signal

are used for adjusting the contrast of the LCD, i.e. the LCD

voltages. The range is 14.9 V to 17.5 V measured at X1 on the

display board. Set the contrast so X1 is 16.2 V. Check the

LCD voltages at X2 (14.7 V), X3 (13.3 V), X4 (2.9 V) and X5

(1.5 V). See Figure 6-19.

The FPGA (U11) has to be programmed. The I2C bus is used

for controlling the loading of the FPGA, the pins PROGN

(U40:9) INITN (U40:7) and DONE (U40:8) are used. The

clock (U11:155) and data (U11:153) are controlled by the


OPTION

3 GHz 8 GHz 14 GHz

Frequency (GHz) 1 1 5

Level (dBm) 0 0 0

Division Factor 16 256 128

Code 0 0 0 1

Code 1 1 0 0

Code 2 0 1 1

Table 6-2 Prescaler characteristics.

processor. See Figure 6-22. The loading starts when PROGN

is set low. The FPGA responds with a negative pulse on

INITN and setting DONE low. After loading 1442016 bits,

which takes approximately 2.2 s, the FPGAsets DONE high if

the loading was successful. If an error is detected, INITN is

set low. One clock pulse after DONE is set high all I/Os on the

FPGA are defined. If the loading of the FPGA is not success-

ful, the program just goes on with the rest of the startup

procedure.

The fan is set to 8.4 V. See Figure 6-23. Measure on J19 or

J28. The input amplifiers are initialized and a "click" from the

relays is heard. The I2C bus is used for controlling the relays.

Note: The I2C bus is of the utmost importance for the start of

the instrument. The FPGA, the LCD and the relays in

the input amplifiers all need a faultless I2C bus to work

properly.

Note: If the Flash PROM is exchanged, it must be replaced

by a preprogrammed Flash PROM. Voltage and

timebase calibration must be performed anew. The

utility program must be used for transferring the cali-

bration results to new factory calibrations. The serial

number and the oscillator option must also be pro-

grammed by the utility program.

The fan is kept at +8.4 V for the first 8.3 minutes. After that

the fan is temperature controlled. The processor reads the

temperature via the I2C bus every 10th second. IC U39 mea-

sures the temperature.

The keys on the display board are read over the I2C bus. If a

key is pressed, the I2C bus circuit U3 notices that and sends an

interrupt to the processor. Check at J13:9; low is interrupt.

The processor then scans the keys via the I2C bus to find the

depressed key. See Figure 6-30. During the scanning there

may appear some extra interrupts. This is not an error condi-

tion.


Figure 6-18 Important locations on PCB 1 during startup.

J19

R492

J28

U39

X33


X3

X2

X5

X1

R33 U3

R34

X4


JTAG

RE

SE

T+

1.8

V

+2.5

V

+3.3

VD

X3

3

32

kHz�P

B3

FL

AS

HS

DR

AM

SD

RA

M

AD

DR

ES

S

CO

NT

RO

L

U1

4

U11

6

U1

3

DIS

PL

AY

PC

B

FP

GA

DA

TA

LC

DB

US

LC

DV

OLT

U1

7U

15

U1

6

U4

U1

U2

LC

D

I/O

U3

KE

YB

OA

RD

U11

TE

MP

U3

9

IC 2

I/OU

40

INT

INT

RE

LA

YS

ET

C.

INITN

DONE

PROGN

�P

CL

K

�P

CL

KLO

AD

FP

GA

CL

K

X2

9

+3.3

VD

+2.5

V

+3.3

VD

+1.8

V

+3.3

VD

+3.3

VD

+3.3

VD

22

16

16

16

32

DIN

Figure 6-20 Microprocessor, memories - startup.


Figure 6-21 Startup timing - processor, memories, fan.

RESETN

FAN

SDRAM CEØ

FLASH PROM CEØ

µP CLK 30 MHz

OSC 32 MHz

Figure 6-22 FPGA loading.

PROGN

INITN

DONE

CLOCK

RESETN


Figure 6-23 Fan startup - extended timescale.

FAN

RESETN

Figure 6-24 LCD control signals, ocillogram #1.

ON via I2C

CONTRAST

RESETN

Figure 6-25 LCD control signals, oscillogram #2.

FRM

LP



FRM

LP


LP

FRM


LP

CLK

Microprocessor Bus &Interfaces

The instrument has a conventional 16-bit microprocessor bus

with 16 bits bidirectional data signals, 5 bits address signals,

Chip Selects and wrn and rdn signals. It connects the proces-

sor to the FPGA, the GPIB and the USB. See Figure 6-34.

The FPGA connection has 16 data bits, 5 address bits, chip

select, wrn and rdn. The FPGA is controlled by the processor

via the bus. Measuring functions are selected, for instance.

The FPGA is controlled between each measurement or block

of measurements. An interrupt signal from the FPGA is con-

nected to the processor. See Figure 6-36 for a typical timing

diagram.

The connection to the USB has 16 data bits, 1 address bit, chip

select, wrn and rdn. An interrupt signal from the USB IC is

connected to the processor. See Figure 6-38 for a typical tim-

ing diagram. The USB IC is a complete USB unit. It is not

powered from the USB bus. The USB IC (U34) has a 6 MHz

oscillator. Check at C416.

The connection to the GPIB has 8 bits, 5 address bits, chip se-

lect, wrn, rdn and a special control signal for the level shifting

IC (U38). U38 is a buffer between the logic level of +3.3 V for

the processor and the logic level of +5 V for the GPIB IC

(U37). An interrupt signal from the GPIB IC is connected to

the processor. See figure ee for a typical timing diagram. The

GPIB IC is a complete GPIB unit. The GPIB IC (U37) has a

40 MHz oscillator. Check at TP20.

Only the selected interface is involved in communication on

the microprocessor bus.



Figure 6-30 Keyboard interrupt.

LD

RESETN

RAN

FRM

D3

D1

Since both interfaces consist of only one IC each, trouble-

shooting is fairly simple. Check that the oscillator (40 MHz or

6 MHz) is running. Check that the processor communicates

with the selected IC. Make sure the external controller (GPIB

or USB) and the interconnection cable used are OK.

There is a separate bus for transfer of the measurement result

data from the FPGA to the processor. This bus is 32 bits wide

and has a clock of its own, FCLK (U11:101). A signal from

the processor, FEMPTY (X28), indicates to the FPGA that a

new packet of 8 words of 32 bits can be transferred. This is

done with the FWR signal (X30) together with the FCLK. The

FPGA can call for attention via an interrupt request signal,

FFIQ (X31). This is done when the FPGA would like to trans-

fer a packet to the processor. See Figure 6-41 for a typical tim-

ing diagram.

Another bus from the microprocessor is the SPI bus. It is a se-

rial bus with one data signal and one clock signal that are com-

mon for all ICs connected to the bus. A separate load signal

for each IC controls the loading of the data. Connected to the

SPI bus are (See Figure 6-42 to Figure 6-45):

• The 100 MHz PLL IC (U9). The SPI bus is used onlyfor initialization after power on.

• The optional oven oscillator IC (U5). The SPI bus isused for initialization after power on and during atimebase calibration.

• The trigger levels IC (U46).

The last bus is the I2C bus. It is also a serial bus with two sig-

nals, SDA and SCL. Each connected IC has a unique address.

The message sent includes the address, and only the addressed

IC will listen to the message and respond by sending an ac-

knowledge to the master. Then it will react accordingly.

Introduction to the I2C Bus

The I2C bus is a 2-line serial bus for the communication be-

tween the ICs. The microprocessor controls the communica-

tion by means of the clock line SCL. One or more slaves can

read or write on the data line SDA.

The SDA and SCL are high at standby. All ICs connected to

the bus can sink SDA to low as they are interconnected via

open collector outputs. The microprocessor starts and stops

the communication by sending terms of start and stop:

During transmission the SDA can be changed only when the

SCL is low.

The microprocessor always begins to send the address infor-

mation. The format of this address information is seven ad-

dress bits, one read/write bit, and one acknowledge bit.

The addressed slave accepts by keeping the SDA line low

while the acknowledge bit (ACKN in ) is sent by the micro-

processor.

Example of addressing (address 30H):

The read/write bit R/W has the following meaning:

R/W = 1 means information from the slave to the µprocessor

R/W = 0 means information from the µprocessor to the slave.

The data information is sent after the address information.

The format of the data information is eight data bits followed

by one acknowledge bit. The reciever accepts by keeping the

SDAline low while the acknowledge bit (ACKN in ) is sent.

Example of data transmission (data 9BH):

The processor is the Master on the I2C bus. Slaves on the bus

are:

• The digital I/O IC U40 with address 20hex. It controlsthe loading of the FPGA at initialization after power on,it controls the relays and filters in the input amplifiers,and it reads the prescaler code at initialization afterpower on.

• The temperature measuring IC U39 with address48hex.

• The digital I/O IC U3 with address 21hex. It switchesthe LCD display on after power-on initialization, itscans the keyboard on the display circuit board.

The bus is connected to the prescaler connector J15 for future

use.


START STOP

SDA

SCL

Figure 6-31 Terms of start and stop.

SDA

SCL

START MSB LSB ACKNR/W

1 2 3 4 51 61 7 8 9

Figure 6-32 Addressing.

SDA

SCL

MSB LSB ACKN

1 2 3 4 51 61 7 8 9

Figure 6-33 Data transmission.


6M

Hz

B4

40

MH

z

B5G

PIB

U3

7

U3

4

US

B

�P

CO

NT

RO

L*

DA

TA

AD

DR

ES

S

FP

GA

+3

.3V

D

INT

+5

VD

INT

U3

8 +5

VD

+3.3

VD

88

3

3

16

16

16 6

35

55

53

2

INT

U11

X2

0

INT

U1

3

ME

AS

UR

EM

EN

TC

ON

TR

OL

**

ME

AS

UR

EM

EN

TD

ATA

FIF

OC

LK

FIF

OA

LE

RT

EM

PT

YR

ES

FP

GA

FIF

OW

R**

CS

US

BC

SF

PG

AC

SG

PIB

DIR

GP

IB

WR

RD

*

Figure 6-34 Microprocessor bus and interfaces.


Figure 6-35 Important locations for the microprocessor and its buses and interfaces.

U5 U46 U9U40 X31 X30 X28 U39 U38 U37 C416 X20 U34U11 U13

Figure 6-36 Microprocessor bus - FPGA timing - Single Pe-

riod.

CS

WR

RD

AØ

DØ

Figure 6-37 Microprocessor bus - FPGA timing - Power On.

CS

AØ

DØ

RD


Figure 6-38 Microprocessor bus - USB timing - Power On.

CS

AØ

DØ

RD

WR

Figure 6-39 Microprocessor bus - GPIB timing - Power On.

GPIB DIR

CS

AØ

DØ

RD

WR

Figure 6-40 FIFO timing #1.

FIFOCLK

FIFOWR

CONTINUOUS 30 MHz

Figure 6-41 FIFO timing #2.

EMPTY

FIFOWR

FIFOALERT

START

INTERPOL


Figure 6-42 SPI bus activity - oven.

DATA

LD

CLOCK

Figure 6-43 SPI bus activity - PLL.

DATA

LD

CLOCK

Figure 6-44 SPI bus activity - PLL - first transfer close-up.

DATA

LD

CLOCK

Figure 6-45 SPI bus activity - trglvl.

DATA

LD

CLOCK

Measuring Logic

The measurements are made in the FPGA. Only four

interpolators are external to the FPGA. They increase the ba-

sic measurement resolution from 10 ns (100 MHz measure-

ment clock) to less than 100 ps. Different combinations of

interpolators are used for different measurement functions;

two, three or four in conjunction. The input signals come from

the input amplifiers. A, B and SR are differential LVPECL in-

puts. C, the prescaler input, is a single-ended LVTTL input.

The measuring logic also provides three LEDs on the front

panel with control signals.

The interpolator transforms a pulse width between 20 and

33 ns to a voltage. This voltage is read by an ADC. The

interpolator is calibrated by reference pulses having a width of

20 and 30 ns . The measurement pulse varies between 22 and

32 ns typically. The ADC has two reference voltages, the

lower limit and the upper limit. The interpolated voltage must

never fall outside these limits.

Select the default setting from the front panel. Apply a

10 MHz sinewave signal (stable low jitter signal) to input A.

The signal should be found at the pins of the FPGA. Check

that the measurement signal is present on pins 17 and 18 (dif-

ferential input) on the FPGA U11.The trigger indicator LED

A on the front panel should blink. The gate indicator on the

front panel should also blink and the display should show the

measurement result. In this setting the S/R flip-flop U12 is

used. Check that the measurement signal is present on pins 30

and 31 (differential input) on the FPGA U11.

Move the 10 MHz sinewave signal to input B. Change the

measurement function to Frequency B. Check that the mea-

surement signal is present on pins 20 and 21 (differential in-

put) on the FPGA U11. The trigger level LED B and the gate

indicator LED should blink and the display should show the

measurement result.

Move the 10 MHz sinewave signal back to input A. Change

the measurement function to Period Single A. Now the S/R

flip-flop should not be used, check the control signal at R623,

it should be -1.6 V (on is -1.0 V). Select statistics. The std de-

viation should be less than 100 ps.

Change the measurement function to Time Interval A - A. Se-

lect Statistics Mode. Check that the standard deviation is less

than 100 ps. Measure at pin 8 of the ADCs U23, U22, U21

and U20. Two types are current, ADC10461 and ADC1061.

See Figure 6-49 for a typical timing diagram with

ADC10461. Figure 6-50 shows an example with ADC1061.

Check the upper (TP3) and lower (TP4) voltage limits of the

ADCs. They should be approximately 3.5 - 3.6 V and 1.1 - 1.4

V. The important thing is that the lowest voltage pulse on any


Figure 6-46 I2C bus activity - reading the temperature.

SDA

NORM.

TEMP

SCL

SDA

LOW

TEMP

Figure 6-47 I2C bus activity - depressing the EXIT key.

SCL

SDA

pin 8 of the ADCs (U23, U22, U21, U20) should be at least

0.2 V above the lower limit and that the highest voltage pulse

on any pin 8 of the ADCs should be at least 0.3 V below the

upper limit. If an interpolator has a voltage pulse outside the

limits the measurement result will be wrong. Figure cc shows

the signals on an ADC.

The signal from the prescaler is connected to pin 22 (sin-

gle-ended) of U11. It comes via a level converter. Check the

input signal to the converter at R335 (PECL levels).

If the FPGA or a part in the interpolators has been changed or

repaired, a calibration of internals must be performed after-


Note The interpolator design has varied slightly in the

course of time, but the pulses in Figures 6-49 and

6-50 are very little affected.


Figure 6-48 Important locations for the measuring logic.

R623 X4X3 U11 U20 U21 U23R335 U22

Figure 6-49 ADC 10461 behavior. Time A-A, 10 MHz in.

U21:8

U20:8

U22:8

U23:8


Figure 6-50 ADC 1061 behavior. Time A-A, 10 MHz in.

U23:8

U21:8

Figure 6-51 Different signals around an ADC.

U23:8

ERRP,

R416

RES,

R414

CS,

pin 5

RD,

pin 4

S/H,

pin 3

INT,

pin 2

Figure 6-52 Close-up of error pulse and S/H output.

U23:8

ERRP,

R416


U1

31

S/R

ON

/OF

F

EX

TA

RM

FP

GA

INP

UT

AM

PL

IFIE

RS

ET

C.

A B

S/R C

TR

GLV

LA

TR

GLV

LB

GA

TE

DIS

PL

AY

LE

DD

RIV

ER

S

INT

ER

PO

L0

INT

ER

PO

L1

INT

ER

PO

L2

INT

ER

PO

L3

U2

0

U2

1

U2

2

U2

3

ST

OP

STA

RT

Vre

f2

.5V

ref

U11

Figure 6-53 Measuring logic, block diagram.

Version B 6-31

Version B





Troubleshooting

General

The '90' is a highly integrated Timer/Counter in which a dedi-

cated FPGA counter circuit handles the signal processing, and

a microcontroller does the postprocessing and supervising

jobs. A number of additional functional units support these

basic tasks, for instance power supply, reference oscillator,

wideband input amplifiers, comparators, memory (RAM &

ROM), digital/analog converters, etc.

The units are treated from a troubleshooting point of view in

this chapter, which means that units described earlier should

be considered faultless before troubleshooting on units de-

scribed later.






ing the counter.

Where to Start

After reading the safety instructions, continue with this

chapter for troubleshooting and repair instructions. When you

have fixed the instrument, always do the Safety Inspection

and Test after Repair, as described later in this Chapter. Then

do the checks in Chapter 2, Performance Check. Recalibrate if

required by following the adjustment instructions in Chapter

7, Calibration Adjustments.

Logic Levels

The '90' contains logic of different families. The levels of the

standard families are listed in Table 6-3. In addition to these

families there is also low-level logic requiring lower supply

voltages, e.g. +3.3 V and +1.8 V.


To be able to test the instrument properly using this manual

you will need the equipment listed in Table 2-1. The list con-

tains the critical parameter specifications.

Operating Conditions

Power voltage must be between 90 VAC and 260 VAC. The in-

strument adapts automatically to the applied voltage.

Basic Functional Units

These are the units that are described in this chapter with ref-

erence to the page where the section starts:

• Power Supply (p. 6-32)

• Input Amplifiers (p. 6-36)

• Timebase Reference Circuits (p. 6-40)

• Prescalers (p.6-43)

• Microprocessor & Memories (p. 6-43)

• Microprocessor Bus & Interfaces (p. 6-49)

• Measurement Logic (p. 6-55)

Power Supply

The DC voltages needed in the instrument are generated from

the three main voltages of the AC/DC module.

The instrument has only a secondary power switch, i.e. the

AC/DC module is always operating if line power is applied.

The three output DC voltages (+5 V, +15 V, -15 V) from the

module are present on the main circuit board. When switched

off, the instrument is in the standby mode. In this mode only


Positive

ECL

Negative

ECL

CMOS TTL

Supply voltage +5 V -5 V +5 V +5 V

Signal ground 0 V 0 V 0 V 0 V

Input voltage

High, VIH >+3.9 V >-1.1 V >+4 V >+2 V

Low, VIL <+3.5 V <-1.5 V <+1 V <+0.8 V

Output voltage

High, VOH >+4 V >-1 V >+4.9 V >+2.7 V

Low, VOL <+3.3 V <-1.7 V <+0.05 V <+0.4 V

Bias ref. voltage,

VBB+3.7 V -1.3 V - -

Table 6-3 Logic levels.

the ON/OFF circuitry and the optional oven oscillator are

powered.

The AC/DC module should not be repaired. Not even the

built-in fuse should be replaced. Built-in circuits protect

against external overloads, so a blown fuse indicates that a se-

vere internal fault has occurred. Replace the complete module

instead.

Test the AC/DC module by measuring the three DC voltages

in TP9 (+5.1 ± 0.05 V), TP21 (-15 ± 1 V) and TP26

(+15 ± 1 V) on the main circuit board. See Figure 6-55. Note

that there is a +5 V trimmer on the module. If the +5 V is not

correct, disconnect the cable to J17 on the main circuit board.

Put a 47 � 1 W resistor on the connector according to Figure

6-55. Measure on the connector +5.1 ± 0.05 V, +15 ± 1 V and

-15 ± 1 V.

It can be difficult to measure the resistance in the supply con-

nector J17 on the main circuit board, because charges are kept

by capacitors some time after line power is removed. Remove

the cable from the AC/DC module. The resistance between

+5 V and ground should be approximately 700 �. See Figure

6-55. In a timer/counter with all capacitors uncharged, +15 V

and -15 V should be >1 M�.

Another way to test J17 is to connect 3 DC voltages from a

separate bench power supply directly to J17 (suitable connec-

tor MOLEX 09-91-0600). See Figure 6-55. The currents

drawn from the different supply voltages depend on options

installed. Before making this measurement, you should re-

move any prescaler option.

A timer/counter without options gives the following typical

results:

+5 V 0.7 A

+15 V 0.3 A

- 15 V 0.4 A

The oven oscillator increases the + 15 V current between

0.35 A (cold) and 0.1 A (warm).

A block diagram of the secondary power supply is shown in

Figure 6-54. All secondary voltages are switched off in

standby mode except +12 VU for the optional oven oscillator.

The ON/OFF circuitry controls the ON and OFF of the sec-

ondary voltages. Its own supply voltage is always ON, as long

as the instrument is connected to line power. See Figure 6-59.


X2+1.8 VU118

DC/DC

+3.3 VDU128

DC/DC

+5 VDU127

SWITCH

X14

X11

+3.3 VAU126

LINEAR

X12DUMMYLOAD

Q56, Q57

ON/OFFLOGIC

Q46, Q47,Q58, U29

X22

X24

+12 VAU129

LINEAR

+15 VDQ49, Q50SWITCH

X15

+12 VUU130

LINEAR

X17FAN

Q48, U30

+15 VU

+5 VU

J28

X16

�PROC.

X10

-12 VAU123

LINEAR

-5.2 VAU124

LINEAR

X8

X62

X25

-15 VU

J17:2,3

J17:1

J17:6

FR

OM

AC

/DC

MO

DU

LE

+5 VA X13

�P

RO

C.

KE

Y

-5.2 VIQ51, U35LINEAR

-2.1 VQ17, U6LINEAR

Figure 6-54 Power distribution

47 �

redbrownbrownblackblackblue

AC

/DC

MO

DU

LE

CA

BL

EA

SS

EM

BLY

PCB PIN CONNECTOR J17

X26

X9

X21

+15 V+5 V+5 VGNDGND-15 V

DUMMY LOAD

16

Figure 6-55 Dummy load connection.

On connection of line power, R478 and C389 keep the

RESETN input of the flip-flop U29 low. This sets the QN out-

put of U29 high. Via Q47 (output signal low) and Q58 (output

signal high) the secondary power supply will be set in ON

mode. To switch to the standby mode, the processor sets the

SETN input of U29 low. This results in the QN output being

low and the secondary power supply being set to standby

mode via Q47 (output signal high) and Q58 (output signal

low). In standby mode a bleeder circuit on +5 VU is

connected. It draws approximately 100 mA to stabilize the

AC/DC module. The standby LED on the front panel is

switched on. To switch to ON mode from standby mode, a

negative pulse, generated by pressing the ON/OFF key on the

front panel, is connected to the RESETN input of U29.

Linear regulators are used for some voltages to ensure mini-

mum noise. Check the TPs below:

X12: +3.3 VA (from +5 VU)

X8: -5.2 VA (from -15 VU)

X10: -12 VA (from -15 VU)

X62: -5.2 VI (from -12 VA)

X25: -2.1 V (from -12 VA)

X16: +12 VA (from +15 VD)

X17: +12 VU (from +15 VU) (to oven oscillator, not

switched off in standby mode)

For digital and general use some voltages are generated by

DC/DC converters. Check the following TPs:

X14: +3.3 VD (from +5 VU)

X2: +1.8 V (from +5 VU)

Some voltages derived directly from the AC/DC module are

used as secondary supply voltages without further regulation,

and they have semiconductor switches in series to make it

possible to shut them off in standby mode. Check the TPs be-

low:

X15: +15 VD (from +15 VU)

X11: +5 VD (from +5 VU)

X13: +5 VA (from +5 VD)

These 12 secondary voltages are used all over the instrument.

All secondary supply voltage lines are segmented into

branches with ferrite beads. See the schematics. This makes it

easier to isolate short circuits by removing ferrite beads tem-

porarily.

The microprocessor, U13, has an internal linear regulator that

generates +1.8 V from +3.3 V. This voltage is used by the pro-

cessor core and can be checked at X66.


Figure 6-56 PCB1 survey

See Fig. 6-57 See Fig. 6-58


Fan Control

The fan is connected to +15 VU over a speed control circuit. It

is only ON if a control signal from the processor is present.

The first 8 minutes after power-up the fan will run at a fixed

speed, fed with +8.3 V. After that the fan is temperature con-

trolled. The processor reads the temperature from U39 via the

I2C bus. Depending on the temperature, the fan is fed with a

DC voltage between 8 and 13.5 V. The processor uses a PWM

signal that is filtered to control the fan.



Input Amplifiers

The input amplifiers for Channel A and Channel B are identi-

cal. A trigger level circuit belongs to each amplifier. The trig-

ger level is adjusted to match the hardware during the voltage

calibration procedure, see Chapter 7. Note that the input am-

plifiers must be adjusted according to Chapter 7 (step re-

sponse, sensitivity etc). The description refers to both chan-

nels (Channel B information within parentheses).

Recall the timer/counter default setting. Select the measure-

ment function Time A-B. Set both input channels to DC, Man

Trig = 0.000 V. No signals connected.

The RF shield must be removed before measuring on the input

amplifiers. It is soldered to two of the shield clips. Don't forget

to put the shield back afterwards and secure it by resoldering.

First measure some DC values. U3 pin 9 (pin 13) should be

near 0.000 V. The same applies to the trigger level, U3 pin 10

(pin 12). The voltage to ground at the point where R171

(R243) and R172 (R244) are connected should be approxi-

mately -0.8 V.

Connect a 1 kHz square wave with amplitude 1 Vpp in 1 M� to

Input A (Input B). Measure at the following points (see also

Figure 6-60) and use the ground pads that are distributed over

the PC board:

Test Points Approximate Voltage

R140 to R141 (R212 to R213) 1.00 Vpp

R156 to C109 (R229 to C140) 0.40 Vpp

U1 pin 2 (U2 pin 2) 0.20 Vpp

U1 pin 3 (U2 pin 3) 0.20 Vpp

U1 pin 6 (U2 pin 6) -1.00 Vdc

R151 to R157 (R223 to R230) 0.40 Vpp

U3 pin 9 (U3 pin 13) 0.40 Vpp

R309 and R314 (R313 and R315) ECL levels -1.0 V and -1.7 V

R301 both sides (R304 both sides) LVPECL levels 1.6 V and

2.6 V

Test the trigger level by manually setting the following trigger

levels. Check the voltage at X6 (X7) and U3 pin 10 (pin 12).

Set Level Approximate Voltage

+1 V +0.41 V

+4 V +1.65 V

-4 V -1.65 V

-1 V -0.41 V

Set the timer/counter to default. Select the measuring function

Single Period. Connect the 1 kHz square wave to channel A

(B). Measure with oscilloscope at X6 (X7). See Figure 6-65

(Figure 6-66) for a typical signal.

If any repair work has been done on the input amplifiers, both

adjustment and voltage calibration must be performed after-

wards. If any repair work has been done on the trigger level

circuits, at least voltage calibration must be performed after-



+5VU

+5VU

+5VU

OFFCTRL

ONCTRL

ON

OFF

C389100NFC389100NF

R593

1K

R593

1K

R592

1K

R592

1K

R44910KR44910K

X51X51

Q58BC847BQ58BC847B

X22X22

X50X50

VC

C1

4

GN

D7


R479220R479220

C197100NFC197100NF

R466

1K

R466

1KX24X24

Q47BC847BQ47BC847B

R472

47

R472

47

X23X23

R4531KR4531K

1MR4781MR478

R584

47

R584

47

D2

CLK3

S4

R1

Q5

Q6

U29A

LVC74A

U29A

LVC74A

R480470R480470

Figure 6-59 ON/OFF logic

ON H

OFF L

ON H

OFF L

ON L

OFF H

A & B are control

signals to PSU

switches and

dummy load.POWER-ON RESET CKT

A

B


Figure 6-60 Test points for troubleshooting the input amplifiers.

Figure 6-61 Oscillogram showing the signal at the interconnection of R140 (R212) and R141 (R213).


Figure 6-62 Oscillogram showing the signal at the interconnection of R156 (R229) and C109 (C140).




Figure 6-65 Oscillogram showing the signal at X6, Period Single A.

Timebase ReferenceCircuits

The measurement reference is either a 10 MHz signal from an

internal oven-controlled crystal oscillator on the main circuit

board or a signal from the external reference input that accepts

the following frequencies: 1, 5 and 10 MHz. Afrequency mul-

tiplier transforms the external signal to 10 MHz. The selected

10 MHz reference is always available at the internal reference

output. See Figure 6-67.

The main PCB is prepared for both types of internal timebase,

but only one of them is mounted. The selection is made at the

factory. You have to run the utility program if the oscillator is

to be changed. Closed Case Calibration is used to adjust the

oscillator. On power-up the processor outputs the setting that

is stored as the correct one for 10.000000 MHz. It will take

some time for the oven oscillator to reach the correct fre-

quency. A calibration must be performed if the adjusting volt-

age should move during operation, not only on power-up.

The selection between the on board oscillator and the external

reference is made in the FPGA. The 10 MHz signal from the

other source is switched off.

Connect a 10 MHz signal to the external reference input. Use

the SETTINGS menu to alternate between internal and exter-

nal oscillator. Check for correct signals at U4:6 for the stan-

dard oscillator, at U4:8 for the oven oscillator and at U33:3 for

the external reference. Check also that the selected timebase

reference is present at the internal reference output BNC con-

nector on the rear panel.

Oven Oscillator


The oven oscillator is a self-contained unit, enclosed in a

metal box and soldered to the main circuit board. It cannot be

repaired and must be replaced with a new oscillator if it is

faulty.

Let the oven oscillator warm up 10 minutes before starting

measurements. The 12 V supply voltage can be checked at

X17. The oven oscillator should be powered also in standby

mode.

The oven oscillator outputs a 10 MHz signal if powered. It

should be 1.3 Vpp measured at R282. If not selected, a gate

(U4) stops the signal, the control signal (U4:9) is then low.

The frequency is controlled by a DAC (U5). Its reference

voltage is derived from the oscillator, approximately +5 V

(C174). The polarity of the reference voltage is reversed in an

op amp (U6), and the voltage at U5:1 should be -5 V. The out-

put voltage from the DAC should be between 0 and Vref, mea-

sured at R281. The DAC is controlled by the processor via the

SPI bus.

The frequency adjustment range should be wide enough to al-

low for more than 10 years of oscillator aging. The oscillator


Figure 6-66 Oscillogram showing the signal at X7, Period Single B.


must be replaced if the normal control voltage range cannot

make the oscillator output 10.000000 MHz.

As a last resort to exclude external causes of malfunction,

desolder the oven oscillator from the main circuit board.

Place it upside down and connect +12 V and ground accord-

ing to Figure 6-68. A cold oven oscillator draws approxi-

mately 0.30 - 0.35 A. During heating the current consumption

varies. After 10 minutes it should stabilize on less than 0.1 A.

The output Vref should be approximately +5 V and the 10

MHz sinewave output signal should have an amplitude of

more than 2.5 Vpp measured with a 1 M�, 10x probe. The

control input has an internal bias to keep the output frequency

in the middle of the range. Adjust the control voltage between

0 V and +5 V and check the output frequency range with a fre-

quency counter. The minimum trimming range should be

±5 Hz. 10.000000 MHz must be reached somewhere between

0 V and +5 V.

If the oven oscillator circuitry is repaired, a new calibration

must be performed. See Chapter 7. A new factory calibration

by means of the utility program should also be performed.



The input signal is amplified in U31. The output signal from

the amplifier should be a square wave with logic levels, repro-

ducing the timing characteristics of the input signal. Check

the signal at U32:11. U32 generates a short pulse (approxi-

mately 40 ns) for each input cycle, check at U32:9. These

pulses generate a broad spectrum of harmonics, and the

following high-Q 10 MHz crystal filter allows only a 10 MHz

sinewave to pass. Measure at X19. Note that the trimmer

C442 is used for maximizing the amplitude at X19. Check that

the amplitude is not less than 1 Vpp. If external reference is not

selected, the gate U33 stops the 10 MHz signal. The control

signal on U33:1 is then low.

100 MHz Multiplier


100 MHz is used in the measuring logic, mainly as a reference

clock, but also for other purposes. A PLL is used for multi-

plying the 10 MHz reference to 100 MHz. On power-up the

processor sets up the PLL IC (U9) via the SPI bus. An output

signal, PLL LOCK, tells the processor if the loop is locked

(high level). A VCO, consisting of an inverter (U47) and an

LC circuit in the feedback loop, is controlled by the PLL IC.

The DC voltage from U9:2 is filtered and controls a capaci-

tance diode. The VCO frequency changes with the capaci-

tance. The loop can handle the switching of 10 MHz refer-

ence, from internal to external and vice versa. There is no

need for a new setup. If external reference is selected and no

such signal is connected to the instrument, the PLL will be un-

FPGA

100 MHzPLL

EXT REFIN

INT REFOUT

STDOSC

OVENOSC

U4 U4-U7

10 MHz

U11

ON/OFF

100 MHz

PLLLOCK(to �P)

ON/OFF

�P/SPI

�P

�P/SPI

U41, Q53, Q54

U31, U32,U33, Q55

U9, U47,U48

Figure 6-67 Timebase reference system.

3

2

1 5

4+12 V

Vref

Vcontrol GND

10 MHzOUT

Figure 6-68 Oven oscillator pinning (seen from bottom side).


Figure 6-69 Important locations in the internal timebase reference circuits.

Figure 6-70 Important locations in the external timebase reference circuits.


locked, and the VCO will go to one of the extremes. The typi-

cal range of the VCO is 95 to 105 MHz, thus giving an error of

typically 5 % in the measuring results.

Check the loop voltage (DC) at R272. It should be 1.6 - 2.2 V.

Check the 100 MHz signal at U48:4. It should be locked to the

incoming 10 MHz at U9:8. Check the lock condition with a

2-channel oscilloscope. Trigger on the 10 MHz channel. Then

the signal on the other channel shall be fixed, i.e. not moving

along the time axis. Check the PLL LOCK signal at U9:14

(lock is high).

Prescaler

The optional prescalers are not to be repaired. The faulty unit

should be sent to the factory, and an exchange unit will be

returned.

The best way to isolate the fault is to use another, functioning,

timer/counter with the same prescaler. Interchange the

prescalers and see if the problem follows the prescaler or the

timer/counter.

First measure with Channels A and B and check that the result

is OK. Select the function Frequency C. Connect a signal ac-

cording to Table 6-2 to Input C. Check the following pins on

the prescaler connector J15 on the main circuit board.

Pin 1 +5 V supply

Pin 5 +12 V supply

Pin 7 ON/OFF, ON is 0 V

Pin 11 test signal, should be 0 V




Pin 4 prescaler output signal, PECL levels (+4.1 V and

+3.4 V)

Measure with oscilloscope and probe at pin 4. The output fre-

quency should be the input frequency divided by the factor in

the table. Check with a frequency counter.

Note: The 2.7 GHz option has a sensitivity trimmer. See

page 7-14 for information on how to adjust it.


Startup Process

The processor in this instrument is a Sharp LH79524 with a

32-bit ARM720T core. It is housed in an IC (U13) together

with peripheral units like SRAM, timers, I2C bus interface,

SPI bus interface and LCD controller.

The 32-bit microprocessor bus is connected to one 16-bit

Flash PROM (U17) and two 16-bit SDRAMs (U15 & U16).

The two SDRAMs are organized as one 32-bit wide memory.

The microprocessor bus is also, via bidirectional buffers, con-

nected to an FPGA, a USB IC and a GPIB IC.

A reset IC (U116) monitors +3.3 VD and +1.8 V. The reset

signal is active low and is kept low for approximately 160 to

180 ms after the voltages have settled and been approved.

Measure at X33. The ramp-up time for +3.3 VD is approxi-

mately 3 ms.

The processor has an internal linear regulator that generates

the core voltage (+1.8 V) from the +3.3 VD I/O voltage.

Check +1.8 V at X66.

The rising edge of the reset signal marks the start of the boot

sequence. All I/Os on the processor are set to inputs. The

11.2896 MHz oscillator will start running (check at R358).

An internal PLL generates 1.88 MHz (reset value) as micro-

processor clock (check at X29). The processor will start read-

ing in the Flash PROM. The initializing of the processor and

the peripherals will start.

The I/Os will be set up, the processor clock will be set to

50.8 MHz (check at X29). The SDRAMs will start, and the

code is copied from the Flash PROM to the SDRAMs. From

now on the code is executed from the SDRAMs. Then all the

other subsystems are initialized: I2C bus, LCD controller, SPI

bus, fan etc. The FPGAis also programmed by the processor.

The progress of the initialization can be followed at two test

points, X55 and X31.

Test Point Reset I/O

Setup

SDRAM

Execute

I2C Init Init Ready

X55 float. inp. 1 0 1 0

X31 float. inp. 1 1 0 0

See Figures 6-74 to 6-76 for a survey of a typical instrument

startup.

The LCD is switched on. The LCD controller in the processor

generates the control signals for the LCD. See Figures 6-77 to

6-81and 6-83. Note the different timing for the signals. The

I2C bus is used for switching the LCD on. The ON signal can

be checked at R34 on the display board. It should be high. The

LCD voltages must also be switched on. It is done by a control

signal from the processor. Check the signal at R33 on the dis-

play board. It should be high. Negative pulses on this signal

are used for adjusting the contrast of the LCD, i.e. the LCD

PRESCALER 2.7 GHz

Frequency (GHz) 1

Level (dBm) 0

Division Factor 16

Code 0 0

Code 1 1

Code 2 0

Table 6-4 Prescaler characteristics.

voltages. The range is 14.9 V to 17.5 V measured at X1 on the

display board. Set the contrast so X1 is 16.2 V. Check the

LCD voltages at X2 (14.7 V), X3 (13.3 V), X4 (2.9 V) and X5

(1.5 V). See Figure 6-72.

The FPGA (U11) is programmed by the processor. The used

pins are PROGN, INITN, DONE (X65), Clock and Data. See

Figure 6-75. The loading starts when PROGN is set low. Then

the processor checks that INITN is low and sets PROGN high

again. The FPGA responds by setting DONE low. After load-

ing, which takes approximately 1.4 s, the FPGA sets DONE

high (check X65), if the loading was successful. If an error is

detected, INITN is set low. One clock pulse after DONE is set

high, all I/Os on the FPGA are defined. If the loading of the

FPGA is not successful, the program just goes on with the rest

of the startup procedure. At test point X67 the FPGA will out-

put approximately 14 Hz. This signal shows that the FPGA is

working and will be switched off about 8 minutes after

power-up.

The fan is set to 8.4 V. Measure on J19 or J28. The input am-

plifiers are initialized and a "click" from the relays is heard.

The I2C bus is used for controlling the relays.

Note: The I2C bus is of the utmost importance for the start of

the instrument. The keys, the LCD and the relays in

the input amplifiers all need a faultless I2C bus to work

properly.

Note: If the Flash PROM is exchanged, it must be replaced

by a preprogrammed Flash PROM. Voltage and

timebase calibration must be performed anew. The

utility program must be used for transferring the cali-

bration results to new factory calibrations. The serial

number and the oscillator option must also be pro-

grammed by the utility program.



J19J28

U39

X33X66

X31

X55

X67

X30X28

X29

X65

R358


X3

X2

X5

X1

R33 U3

R34

X4


JTA

G

RE

SE

T+

1.8

V

+3.3

VD

X3

3

11.2

89

6M

Hz

�P

B7

FLA

SH

SD

RA

MS

DR

AM

AD

DR

ES

S

CO

NT

RO

L

U11

6/U

55

U1

3

DIS

PL

AY

PC

B

FP

GA

DA

TA

LC

DB

US

LC

DV

OLT

U1

7U

15 U

16

U4

U1

U2

LC

D

I/O

U3

KE

YB

OA

RD

U11

TE

MP

U3

9

IC 2

I/OU

40

INT

INT

RE

LA

YS

ET

C.

�P

CL

K

�P

CL

KL

OA

DF

PG

A

CL

K

X2

9

+3

.3V

D(+

1.8

Vin

tern

al)

+3

.3V

D+

1.8

V

+3

.3V

D+

3.3

VD

+3

.3V

D

22

16

16

16

32

DIN

X5

5

X3

1S

tartu

pM

on

itor

DO

NE

INIT

NP

RO

GN

X6

5

BUFFER

5

32

32

BUFFER

U1

6

U5

2

U5

3/U

54

Figure 6-73 Microprocessor, memories - startup.


Figure 6-74 Startup timing - processor, memories, fan.

RESN

FAN

SDRAM CE

FLASH PROM CE

µP CLOCK

OSC 11 MHz

X31

X55

Figure 6-75 FPGA loading.

PROGN

INITN

DONE

CCLK

RESN


Figure 6-76 Startup indicator test points.

Figure 6-77 LCD control signals, ocillogram #1.

ON

CONTRAST

RESN


FRM

LP

X55

X31



FRM

LP


LP

RAN


LP

CLK


The fan is kept at +8.4 V for the first 8.3 minutes. After that

the fan is temperature controlled. The processor reads the

temperature via the I2C bus every 10th second. IC U39 mea-

sures the temperature.

The keys on the display board are read over the I2C bus. If a

key is pressed, the I2C bus circuit U3 notices that and sends an

interrupt to the processor. Check at J13:9; low is interrupt.

The processor then scans the keys via the I2C bus to find the

depressed key. See Figure 6-82. During the scanning there

may appear some extra interrupts. This is not an error condi-

tion.

Microprocessor Bus &Interfaces

The microprocessor bus is divided into two parts with buffers.

The inner part consists of the Flash PROM and the SDRAMs.

Buffers isolate the inner part from long lines in order to make

the SDRAM work safely. The buffers of the 32-bit data bus

are bidirectional and a control signal opens the buffers only

during reads and writes (U56:8, low to open buffers). The di-

rection of the buffers is controlled by the rdn from the proces-

sor.

The outer part consists of the 32-bit data bus and the 5-bit ad-

dress bus. It connects the processor (U13) to the FPGA (U11),

the GPIB and the USB. See Figure 6-87.

The FPGA connection has 32 data bits, 5 address bits, chip se-

lect, wrn and rdn. The FPGAis controlled by the processor via

the bus; measurement functions are selected, for instance. The

FPGA is controlled between each measurement or block of

measurements. An interrupt signal from the FPGA is con-


diagram.

Figure 6-82 Keyboard interrupt .


LP

RESN

RAN

FRM

D1

The connection to the USB has 16 data bits, 1 address bit, chip

select, wrn and rdn. An interrupt signal from the USB IC is

connected to the processor. See Figure 6-90 for a typical tim-

ing diagram. The USB IC is a complete USB unit. It is not

powered from the USB bus. The USB IC (U34) has a 6 MHz

oscillator. Check at C416.

The connection to the GPIB has 8 data bits, 5 address bits,

chip select, wrn, rdn and a special control signal for the level

shifting IC (U38). U38 is a buffer between the logic level of

+3.3 V for the processor and the logic level of +5 V for the

GPIB IC (U37). An interrupt signal from the GPIB IC is con-


diagram. The GPIB IC is a complete GPIB unit. The GPIB IC

(U37) has a 40 MHz oscillator. Check at TP20.

Only the selected interface is involved in communication on

the microprocessor bus.

Since both interfaces consist of only one IC each, trouble-

shooting is fairly simple. Check that the oscillator (40 MHz or

6 MHz) is running. Check that the processor communicates

with the selected IC. Make sure the external controller (GPIB

or USB) and the interconnection cable used are OK.

The transfer of measurement results from the FPGA to the mi-

croprocessor goes via the 32-bit microprocessor bus and nor-

mal reads. There are some extra handshake pins to facilitate

the transfer. An interrupt signal is sent to the microprocessor if

results are to be read, ALERT, X30. X28 (EMPTY) indicates

that it is allowed to read results, and the microprocessor sets a

signal high to indicate that it is reading results, UPRD,

U11:203. Results are always read in packets of 8 words. See

Figure 6-92 for a typical timing diagram.

Another bus from the microprocessor is the SPI bus. It is a se-

rial bus with one data signal and one clock signal that are com-

mon to all ICs connected to the bus. A separate load signal for

each IC controls the loading of the data. Connected to the SPI

bus are (See Figure 6-93 to Figure 6-96):

• The 100 MHz PLL IC (U9). The SPI bus is used onlyfor initialization after power on.

• The optional oven oscillator IC (U5). The SPI bus isused for initialization after power on and during atimebase calibration.

• The trigger levels IC (U46).

The last bus is the I2C bus. It is also a serial bus with two sig-

nals, SDA and SCL. Each connected IC has a unique address.

The message sent includes the address, and only the addressed

IC will listen to the message and respond by sending an ac-

knowledge to the master. Then it will react accordingly.

Introduction to the I2C Bus

The I2C bus is a 2-line serial bus for the communication be-

tween the ICs. The microprocessor controls the communica-

tion by means of the clock line SCL. One or more slaves can

read or write on the data line SDA.

The SDA and SCL are high at standby. All ICs connected to

the bus can sink SDA to low as they are interconnected via

open collector outputs. The microprocessor starts and stops

the communication by sending terms of start and stop:

During transmission the SDA can be changed only when the

SCL is low.

The microprocessor always begins to send the address infor-

mation. The format of this address information is seven ad-

dress bits, one read/write bit, and one acknowledge bit.

The addressed slave accepts by keeping the SDA line low

while the acknowledge bit (ACKN in ) is sent by the micro-

processor.

Example of addressing (address 30H):

The read/write bit R/W has the following meaning:

R/W = 1 means information from the slave to the µprocessor

R/W = 0 means information from the µprocessor to the slave.

The data information is sent after the address information.

The format of the data information is eight data bits followed

by one acknowledge bit. The reciever accepts by keeping the

SDAline low while the acknowledge bit (ACKN in ) is sent.

Example of data transmission (data 9BH):


START STOP

SDA

SCL

Figure 6-84 Terms of start and stop.

SDA

SCL

START MSB LSB ACKNR/W

1 2 3 4 51 61 7 8 9

Figure 6-85 Addressing.

SDA

SCL

MSB LSB ACKN

1 2 3 4 51 61 7 8 9

Figure 6-86 Data transmission.


6M

Hz

B4

40

MH

z

B5G

PIB

U3

7

U3

4

US

B

�P

CO

NT

RO

L*

DA

TA

AD

DR

ES

S

FP

GA

+3.3

VD

INT

+5

VD

INT

U3

8 +5

VD

+3.3

VD

88

3

3

16

32

32

5

35

55

3

INT

U11

X2

0

INT

U1

3

RE

SU

LT

HA

ND

SH

AK

E**

AL

ER

TE

MP

TY

UP

RD

**C

SU

SB

CS

FP

GA

CS

GP

IBW

RN

RD

N

*

PARTOFMEM.SEEP.6-20

DIR

GP

IB

U5

2

U5

3,U

54

BUFFERBUFFER

LOGIC

U5

6,U

57

OE

P

32

5

Figure 6-87 Microprocessor bus and interfaces.


Figure 6-88 Important locations for the microprocessor and its buses and interfaces.

U5 U46 U9U40 X30 X28 U39 U38 U37 C416 X20 U34U11 U56U13

Figure 6-89 Microprocessor bus - FPGA timing - Single Pe-

riod - Hold, after Restart.

CS

WR

RD

OEP


Figure 6-90 Microprocessor bus - USB timing - Power On.

CS

AØ

OEP

RD

WR

Figure 6-91 Microprocessor bus - GPIB timing - Power On.

GPIB DIR

CS

AØ

OEP

RD

WR

Figure 6-92 FIFO timing - Block:5, Single Period, 10 MHz.

EMPTY

UPR

ALERT

START

INTERPOL

CS FPGA

RD


Figure 6-93 SPI bus activity - oven - directly after power-up.

DATA

LD

CLOCK

Figure 6-94 SPI bus activity - PLL - directly after power-up.

DATA

LE

CLOCK

Figure 6-95 SPI bus activity - PLL - first transfer close-up.

DATA

LE

CLOCK

Figure 6-96 SPI bus activity - trglvl.

DATA

LE

CLOCK


� The I2C Bus in the ‘90’

The processor is the Master on the I2C bus. Slaves on the bus

are:

• The digital I/O IC U40 with address 20hex. It controlsthe relays and filters in the input amplifiers.

• The temperature measuring IC U39 with address48hex.

• The digital I/O IC U3 with address 21hex. It switchesthe LCD display on after power-on initialization, itscans the keyboard on the display circuit board.

The bus is connected to the prescaler connector J15 for future

use.


Measuring Logic

The measurements are made in the FPGA. Only four

interpolators are external to the FPGA. They increase the ba-

sic measurement resolution from 10 ns (100 MHz measure-

ment clock) to less than 100 ps. Different combinations of

interpolators are used for different measurement functions;

two, three or four in conjunction. The input signals come from

the input amplifiers. A, B and SR are differential LVPECL in-

puts. C, the prescaler input, is a single-ended LVTTL input.

The measuring logic also provides three LEDs on the front

panel with control signals.

The interpolator transforms a pulse width between 20 and

33 ns to a voltage. This voltage is read by an ADC. The

interpolator is calibrated by reference pulses having a width

of 20 and 30 ns . The measurement pulse varies between 22

and 32 ns typically. The ADC has two reference voltages, the

lower limit and the upper limit. The interpolated voltage must

never fall outside these limits.

Select the default setting from the front panel. Apply a

10 MHz sinewave signal (stable low jitter signal) to input A.

The signal should be found at the pins of the FPGA. Check

that the measurement signal is present on pins 10 and 11 (dif-

ferential input) on the FPGA U11.The trigger indicator LED

A on the front panel should blink. The gate indicator on the

front panel should also blink and the display should show the

measurement result. In this setting the S/R flip-flop U12 is

used. Check that the measurement signal is present on pins 45

and 46 (differential input) on the FPGA U11.

Move the 10 MHz sinewave signal to input B. Change the

measurement function to Frequency B. Check that the mea-

surement signal is present on pins 20 and 21 (differential in-

put) on the FPGA U11. The trigger level LED B and the gate

indicator LED should blink and the display should show the

measurement result.

Figure 6-97 I2C bus activity - reading the temperature.

SDA

HIGH

TEMP

SCL

SDA

LOW

TEMP

Figure 6-98 I2C bus activity - depressing the EXIT key.

SCL

SDA

Move the 10 MHz sinewave signal back to input A. Change

the measurement function to Period Single A. Now the S/R

flip-flop should not be used, check the control signal at R623,

it should be -1.6 V (on is -1.0 V). Select statistics. The std de-

viation should be less than 100 ps.

Change the measurement function to Time Interval A - A. Se-

lect Statistics Mode. Check that the standard deviation is less

than 100 ps. Measure at pin 8 of the ADCs U23, U22, U21 and

U20. See Figure 6-100 for a typical timing diagram. Check

the upper (TP3) and lower (TP4) voltage limits of the ADCs.

They should be approximately 3.5 - 3.6 V and 1.0 - 1.4 V. The

important thing is that the lowest voltage pulse on any pin 8 of

the ADCs (U23, U22, U21, U20) should be at least 0.2 V

above the lower limit and that the highest voltage pulse on any

pin 8 of the ADCs should be at least 0.3 V below the upper

limit. If an interpolator has a voltage pulse outside the limits

the measurement result will be wrong. Figure 6-101 shows the

signals on an ADC.

The signal from the prescaler is connected to pin 22 (sin-

gle-ended) of U11. It comes via a level converter. Check the

input signal to the converter at R335 (PECL levels).

If the FPGA or a part in the interpolators has been changed or

repaired, a calibration of internals must be performed after-



Figure 6-99 Important locations for the measuring logic.

R623 X4X3 U11 U20 U21 U23R335 U22

Figure 6-100 ADC 10461 behavior. Time A-A Smart, 10 MHz

in, block measurement.

U21:8

U20:8

U22:8

U23:8


Figure 6-101 Different signals around an ADC.

U23:8

ERRP,

R416

RES,

R414

CS,

pin 5

RD,

pin 4

S/H,

pin 3

INT,

pin 2

Figure 6-102 Close-up of error pulse and S/H output.

U22:8

ERRP,

R403

Figure 6-103 Power-up & Reset.

3.3 V

RE SN


U1

31

S/R

ON

/OF

F

EX

TA

RM

FP

GA

INP

UT

AM

PL

IFIE

RS

ET

C.

A B

S/R C

TR

GLV

LA

TR

GLV

LB

GA

TE

DIS

PL

AY

LE

DD

RIV

ER

S

INT

ER

PO

L0

INT

ER

PO

L1

INT

ER

PO

L2

INT

ER

PO

L3

U2

0

U2

1

U2

2

U2

3

ST

OP

STA

RT

Vre

f2

.5V

ref

U11

Figure 6-104 Measuring logic, block diagram.

Safety Inspection and Test After Repair

General Directives

After repair in the primary circuits, make sure that you have

not reduced the creepage distances and clearances.

Before soldering, component pins must be bent on the solder

side of the board. Replace insulating guards and plates.

Safety Components

Components in the primary circuits are important to the safety

of the instrument and may only be replaced by components

obtained from your local service organization.

Check the Protective Ground Connection

Visually check the correct connection and condition and mea-

sure the resistance between the protective lead at the plug and

the cabinet. The resistance must not be more than 0.5 �. Dur-

ing measurement, the power cord should be moved. Any vari-

ations in resistance shows a defect.

Safety Inspection and Test After Repair 6-59


6-60 Safety Inspection and Test After Repair

Chapter 7

Calibration

Adjustments

Calibration

To maintain the performance of the timer/counter, we recom-

mend that you calibrate the timebase of your instrument every

year, or more often if you require greater timebase accuracy.

If your applications utilize the voltage measurement capabili-

ties of this counter series, you should also calibrate the voltage

ranges with a good calibrator.

Calibration should be performed with traceable references

and instruments at a certified calibration laboratory. Contact

your local service center for information on calibration facili-

ties in your neighborhood.

As both timebase and voltage calibration are closed-case

menu-controlled procedures that require no manual adjust-

ments on the DUT, you can perform the task on your own

without infringing the safety regulations, provided you pos-

sess the required skill and have access to the necessary cali-

bration equipment.

To know the present status of your instrument, test your coun-

ter from time to time. The test can be made according to the in-

formation in Chapter 2, “Performance Check.”

General Principles

The inherent meaning of calibration is to measure and record

the deviation of a parameter from a known reference. Data

from subsequent calibrations under similar ambient condi-

tions form the calibration history, from which you can draw

conclusions regarding aging characteristics.

Consequently calibration does not necessarily include the

next natural step in the procedure, i.e. adjustment in order to

make the instrument meet the original specifications.

The calibration procedure for these instruments also implies

automatic adjustment, so if you want a continuous history re-

cord, you should follow the simple rules of thumb below that

summarize the basics of all calibration, frequency as well as

voltage.

• Place the instrument in its calibration environment,preferably at an ambient temperature of +23 ± 2 °Cand power it up.

• Let the instrument assume its final internal operatingtemperature. Allow at least a warm-up period of twohours before proceeding.

• Measure the deviation and record the value. Use a ref-erence source whose uncertainty is at least an orderof magnitude less than that of the DUT.

7-2 General Principles

Model 90 90 90

Option Standard PM6690/_5_ PM6690/_6_

Timebase type UCXO OCXO OCXO

Total uncertainty, for operatingtemperature 0°C to 50°C,@ 2 (95 %) confidence interval:

-1 month after calibration-3 months after calibration-1 year after calibration-2 years after calibration

<1.2 x 10-5

<1.2 x 10-5

<1.2 x 10-5

<1.5 x 10-5

<2 x 10-8

<4 x 10-8

<6 x 10-8

<1.2 x 10-7

<0.7 x 10-8

<1.2 x 10-8

<1.8 x 10-8

<3.6 x 10-8

Typical total uncertainty, for oper-ating temperature 20°C to 26°C,@ 2 (95 %) confidence interval:

-1 month after calibration-3 months after calibration-1 year after calibration-2 years after calibration

<4 x 10-6

<4 x 10-6

<7 x 10-6

<1.2 x 10-5

<2 x 10-8

<4 x 10-8

<6 x 10-8

<1.2 x 10-7

<0.7 x 10-8

<1.2 x 10-8

<1.7 x 10-8

<3.5 x 10-8

For complete specifications see Chapter 8 of the Operators Manual.

Table 7-1 Suitable calibration intervals depend on the total uncertainty of different timebase options and the requirements of your applica-

tion.

• Start the calibration & adjustment procedure and fol-low the instructions.

• Measure the deviation and record the value.

• Check that the parameter meets its specification.

The Calibration Submenu

When used for the first time, this submenu can be activated

from the USER OPT menu after first entering the fixed pass-

word 62951413. All calibrations that can be performed manu-

ally are controlled from here. Internal delays can be compen-

sated for as well as aging of the timebase and voltage refer-

ences. All calibration procedures are performed without hav-

ing to remove the instrument cover. In this way it is easier to

keep the calibration environment as close to the operating en-

vironment as possible. No special tools are necessary, and live

parts are not exposed to the operator, who is guided through

the procedures by instructions on the instrument display. The

whole concept is known as Closed-Case Calibration.

NOTE: The timer/counter must have been switched on for at

least one hour before you start any calibration.

When the instrument leaves the factory, the calibration data is

stored as factory calibration that cannot be changed by the

user.

There is one active set of calibration data. It can be a user set

or the factory set. If a user set is active and a new user calibra-

tion procedure is initiated, then the older set of data is stored to

make it possible to return to the earlier calibration status.

Password Protection ON/OFF

The default setting on delivery for the password protection is

ON but can be changed to OFF after the first-time use if so de-

sired. Activate or deactivate the password with this key.

Internals

Certain internal delays are measured in order to correct the re-

sults of real measurements. This is done without applying ex-

ternal signals. This procedure needs only be run after firm-

ware upgrading, or if repair work has been done on the mea-

suring logic or the analog interpolators.

Press Start Calib to run the procedure. The new calibration

will be the active calibration.

� Calibration via the GPIB or the USB

The calibration can also be performed by sending commands

over one of the interface buses.

Always end the commands with the Operation Complete

Query *OPC?

Use the following command sequence:

:CAL:DEL:INIT;*OPC?

:CAL:DEL:START;*OPC?

:SYST:ERR? -- check for errors --

:CAL:DEL:STOR

Timebase

A reference frequency with adequate accuracy must be con-

nected to Channel A. Timebase calibration should be per-

formed regularly at intervals that depend on the timebase it-

self and the user application. Read more about the procedure

under Frequency Reference below.

Voltage

A sequence of voltage levels from a dedicated calibrator must

be applied to Channel A and Channel B. Voltage calibration

should be performed regularly if the user application calls for

traceable voltage measurements. Read more about the proce-

dure under Voltage Reference below.

Restore

You can make a stored set of calibration data, either a user set

or the factory set, the active calibration. If the previous active

calibration was a new user calibration, then it will be lost.

Frequency Reference

The frequency of the reference crystal oscillator is the main

parameter that influences the accuracy of a counter. External

conditions, such as ambient temperature and supply voltage,

affect the frequency, but aging is also an important factor.

Note that frequency adjustment only compensates for devia-

tion due to aging.

Some important points

The two optional high-stability oscillators, type OCXO, have

been built into an oven to keep the oscillator temperature as

stable as possible. Continuous operation is also important for

optimum stability. Option PM6690/_6_, for example, has an

aging/24h that is 1x10-10 when operating continuously. After a

power interruption, the oscillator drift is higher and the speci-

The Calibration Submenu 7-3

fication of 1x10-10 per 24h is reached only after 48h of contin-

uous operation.

– The frequency uncertainty for standard oscillators is

mainly dependent on the ambient temperature. Variations

in ambient temperature between 0 �C and +50 �C may

cause a frequency change of up to 100 Hz, whereas the

aging per month is only 5 Hz. During warm-up the tem-

perature increase inside the counter will affect the oscil-

lator for about two hours.

� How often should you calibrate?

In the table on the preceding page you can see the uncertainty

of your time base oscillator for various MTBRC (Mean Time

Between Recalibration) intervals.

Compare the requirements of your application with the values

in the table, and select the proper MTBRC accordingly.

Please note that the frequency uncertainty when operating in a

temperature controlled environment is different from field

use. See the two sections in the table.

�When adjusted, keep in mind that the referencecrystal oscillator will be compensated only for fre-quency deviation caused by aging.

Timebase Calibration Procedure

� Test Equipment

The instrumentation outlined here is an example of equipment

meeting the minimum requirements for calibrating the differ-

ent timebase options. You are free to choose other equipment

as long as its performance is adequate for the purpose.

A suitable reference oscillator can be derived from a number

of sources, the specifications of which determine the type of

DUT timebase option that can be calibrated.

The table suggests a number of possible combinations. Re-

member this rule of thumb: the reference should be at least

five times better than the DUT for a reliable calibration result.

� Work Instructions

– Determine the minimum requirements of the reference

oscillator and make a signal meeting these requirements

available at your test site.

NOTE: You can use a number of different calibration fre-

quencies for the DUT: 1 MHz, 1.544 MHz, 2.048 MHz,

5 MHz and 10 MHz.

– Place the DUT in its calibration environment, preferably

at an ambient temperature of +23 ± 2 °C and power it

up.

– Recall the default settings by keying in the following se-

quence:

USER OPT� Save/Recall �

Recall Setup � Default

– Let the DUT assume its final internal operating tempera-

ture. Allow at least a warm-up period of two hours be-

fore proceeding.

– Connect the reference oscillator signal to Input A on the

DUT.

– Select 10 s measuring time (under SETTINGS) and mea-

sure the frequency.

NOTE: Use a measuring time that is long enough to meet the

required resolution (see Table 7-1) or use statistics to

find the mean value of multiple measurements.

– Calculate the relative deviation of the internal timebase

as �rel = -(fmeas- fref)/fref.

– Translate this value to an absolute deviation �abs of the

internal 10 MHz timebase by using the expression:

�abs = �rel � 107 (Hz)

– Note this value as the calibration state before adjust-

ment, and decide if an adjustment is necessary according

to the applicable criteria.

– Stop here if an adjustment is not necessary. Otherwise

go on.

– Go to the Calibration Submenu and select Timebase.

– Press Calib Freq and select one of the possible frequen-

cies, or let the counter decide on its own by accepting

the preselected Auto setting.

– Start the calibration procedure by pressing Start Calib

and follow the instructions on the display.

– You must enter a date at the end of the procedure in or-

der to make the result the active user calibration.

– Measure the external reference frequency once more,

and calculate the deviation of the internal timebase in

the same way as before the adjustment. Note this value

as the calibration state after adjustment.

– Compare the two deviation values, and check that the

calibration procedure has been successful.

– Fill out the calibration protocol if required.

7-4 Frequency Reference

DUT Option Reference Oscillator

Standard PM6690/_5_

PM6690/_5_ 909

PM6690/_6_ 909

Table 7-2 Reference Oscillator requirements.

Voltage Reference 7-5

� Timebase Calibration via the GPIB or the USB

The frequency calibration can also be performed by sending

commands over one of the interface buses.


Query *OPC?

Use the following command sequence:

:CAL:ROSC:INIT; *OPC?

:CAL:ROSC:FREQ <num. value>; *OPC? -- select and con-

nect reference frequency --

:CAL:ROSC:START; *OPC?


:CAL:ROSC:STOR yyyymmdd --enter calibration date --

Voltage Reference

Although a counter/timer is chiefly an instrument for measur-

ing time and frequency related parameters, this instrument

also has voltage measurement capabilities that you can benefit

from. Under certain circumstances you can do without a

DVM in a test system, but then you have to calibrate and ad-

just the built-in voltage reference regularly to ensure the spec-

ified uncertainty.

Voltage Calibration Procedure

� Test Equipment

You should preferably use a dedicated DC voltage calibrator

with an uncertainty at least a magnitude less than the measure-

ment specification (see Chapter 8 of the Operators Manual).

Alternatively you can use a stable laboratory power supply

with an external precision voltage divider, for instance a

ten-turn potentiometer, in combination with an adequately ac-

curate DVM for verification.

Note: In contrast to a DVM the counter/timer has a wide-

bandwidth input, and the voltage calculation principle

is based on peak-to-peak measurements rather than

mean value or RMS measurements. This means that

HF noise that is often present at the output of standard

calibrators and power supplies must be filtered out

when the test voltages are applied to the counter in-

put. Always use shielded test leads that are as short

as possible.

� Work Instructions

– Arrange your test setup according to the outline given

above.

Note: Both Input A and Input B should be calibrated. If

you want a traceability record you should apply a num-

ber of positive and negative DC voltages covering the

dynamic range and write down the deviations. Use the

following list:

+50 V, +20 V, +5 V, +2 V, +0.5 V, 0 V, -0.5 V, -2 V, -5

V, -20 V, -50 V

– Key in the following sequence on the DUT.

USER OPT � Calibrate � (Enter Password if enabled)

� Voltage � Start Calib

– Follow the step-by-step instructions on the display.

– You must enter a date at the end of the procedure in or-

der to make the result the active user calibration.

– If you want a traceability record, verify the calibra-

tion/adjustment procedure by applying the same list of

voltages as above and write down the deviations.

– Fill out the calibration protocol if required.

� Voltage Calibration via the GPIB or the USB

The following DC voltages should be applied to the

timer/counter in this order: +50, +20, +5, +2, +0.5, 0, -0.5, -2,

-5, -20, -50 V, first to Input A(1) and then to Input B(2).

If you cannot generate the exact voltage, a voltage in the vi-

cinity of the required voltage can be used, but the value must

be sent in the bus command; two values between +50 and

+5 V, seven values between +5 V and -5 V, and two values be-

tween -5 V and -50 V. One value should be near zero.


Query *OPC?

Use the following command sequence, and apply the correct

DC voltage to the specified input before each command:

:CAL:VOLT:INIT;*OPC?

:CAL:VOLT:INP1:VAL 50.0000;*OPC?




*

*

:CAL:VOLT:INP1:VAL -50.0000;*OPC?

:CAL:VOLT:INP2:VAL -50.0000;*OPC?


:CAL:VOLT:STOR yyyymmdd -- enter calibration date --

7-6 Voltage Reference

Calibration Subsystem

Command Reference

:CALibration

DELays

:INITialize

:STARt

:STORe

:ROSCillator

:FREQuency � <Numeric Value>

:AUTO � <Boolean>

:INITialize

:LOAD

:FACTory

:USER

:STARt

:STORe � <YYYYMMDD>

:VOLTage

:INITialize

:INPut1

:VAL � <Numeric Value>

:INPut2

:VAL � <Numeric Value>

:LOAD

:FACTory

:USER

:STORe � <YYYYMMDD>


:CALibration :DELays :INITialize

Calibration of Internal Delays

Initializes the calibration process.

:CALibration :DELays :STARt


Starts the calibration process.

:CALibration :DELays :STORe


Ends the calibration process and stores the calibration factors.

:CALibration :ROSCillator :FREQuency�<Numeric value>

Calibration of Reference Oscillator

Selects the reference frequency used for the timebase calibration. AUTO is automatically set to OFF.

Parameters:

<Numeric value> = (1E+6 | 1.544E+6 |2.048E+6 | 5E+6 | 10E+6)

Returned format: <Numeric value>

*RST condition: Not affecting this setting


:CALibration :ROSCillator :FREQuency :AUTO�<Boolean>

Calibration of Reference Oscillator

Switches the AUTO mode ON/OFF for the reference frequency calibration. If ON, the timer/counter measures theapplied reference frequency before the start of the calibration process and adjusts the calculation algorithm ac-cordingly.

Parameters:

<Boolean> = (1 | ON / 0 | OFF)

Returned format: 1 | 0

*RST condition: Not affecting this setting

:CALibration :ROSCillator :INITialize

Calibration of Reference OscillatorInitializes the calibration process.

:CALibration :ROSCillator :LOAD :FACTory

Restore Factory Calibration

Recalls the calibration factors stored by the factory before delivery or after service.

:CALibration :ROSCillator :LOAD :USER

Restore User Calibration

Recalls the calibration factors last stored by the user.


:CALibration :ROSCillator :STARt

Start Calibration

Starts the calibration process after an external reference source has been connected to Input A.

:CALibration :ROSCillator :STORe�<YYYYMMDD>

Store User Calibration

Ends the calibration process and stores the calibration factors using the date code YYYYMMDD, that is year(4 digits), month (2 digits), and day (2 digits).

Example:SEND� :CAL:ROSC:STOR 20040731

:CALibration :VOLTage :INITialize

Calibration of Reference Voltage

Initializes the voltage calibration process.

:CALibration :VOLTage :INPut«[1]|2» :VAL�<Numeric Value>

DC Voltage Calibration

Calibrates a DC voltage within the range -50 V - +50 V if the corresponding voltage from a voltage referencesource is applied to the input that is addressed in the command.

Example for Input A (1):SEND� :CAL:VOLT:INP:VAL 5

+5 V is applied to input A before sending the command.

Example for Input B (2):SEND� CAL:VOLT:INP2:VAL -20

-20 V is applied to input B before sending the command.

Note: The DC voltages must be sent in a prescribed order. See page 7-5.


:CALibration :VOLTage :LOAD :FACTory

Restore Factory Calibration

Recalls the calibration factors stored by the factory before delivery or after service.

:CALibration :VOLTage :LOAD :USER

Restore User Calibration

Recalls the calibration factors last stored by the user.

:CALibration :VOLTage :STORe�<YYYYMMDD>

Store User Calibration

Ends the calibration process and stores the calibration factors using the date code YYYYMMDD, that is year (4digits), month (2 digits), and day (2 digits).

Example:SEND� :CAL:VOLT:STOR 20040731

Adjustments

Preparations

Before beginning the adjustments, power up the instrument

after removing the cover (see Chapter 3) and leave it on for at

least 60 minutes to let it reach normal operating temperature.






ing the timer/counter.

Preparations 7-11

Figure 7-2 Test points and trimmers for the input amplifiers.

GND

TP

GND

GND

TP

GND J9J7

Input Amplifiers

Check the power supply voltages according to the instructions

on page 7-13 before proceeding to the next step.

All adjustments on the input amplifiers must be made in the

specified order.

The input amplifiers are enclosed in an RF shield consisting

of a metal lid that is soldered to two of the shield clips on the

main circuit board. Without these solder joints there is a risk

of the lid coming off, should the instrument be subjected to

heavy bumps.

There are two alternative ways to adjust the input amplifiers.

One is to remove the shield to gain access to all trimmers and

test points on the top side of the main circuit board. Don't for-

get to put the shield back and restore the solder joints. The

other way is to access the trimmers via the holes in the shield

lid and to use the test points on the bottom side of the main cir-

cuit board. Place the instrument on end to get access to both

sides of the main circuit board.

Step Response X1

� Setup

– Do as described under Preparations above.

– Select default settings by keying in USER OPT �

Save/Recall � Recall Setup � Default

– Select for Input A of the timer/counter: Manual Trig,

DC, 50 �, Att x1. Select Single Period as measurement

function.

– Connect a symmetrical pulse signal with fast rise/fall

time, 100 �s period time and 5 V amplitude from a

pulse generator to a power splitter.

– Connect one side of the power splitter to Input A on the

timer/counter and connect the other side of the power

splitter to Input A on the oscilloscope.

– Connect a 10X 500 � probe to Input B on the oscillo-

scope.

– Set the oscilloscope to 10 �s/div and Input A to 50 �,

DC, 0.5 V/div and Input B to 50 �, DC, 100 mV/div

(including probe).

� Adjustment

– Connect the probe tip to the center hole of J7. The sur-

rounding holes are suitable ground connections. See Fig-

ure 7-2.

– Adjust C106 and C496 until the pulses on the oscillo-

scope look the same. Use Temex 4192 adjustment tool.

Repeat all steps above for Input B on the timer/counter. Con-

nect the probe tip to J9. Adjust C137 and C497.

Step Response X10

� Setup

– Keep the settings on the timer/counter and the oscillo-

scope from Step Response X1.

– Select Att X10 for Input A on the timer/counter.

– Reconnect the signal from the power splitter to Input A

on the timer/counter.

– Set Input B on the oscilloscope to 20 mV/div (including

probe).

� Adjustment

– Connect the probe tip to the center hole of J7. The sur-


ure 7-2.

– Adjust C111 and C116 until the pulses on the oscillo-

scope look the same. Use a screwdriver type of adjust-

ment tool.


nect the probe tip to J9. Adjust C143 and C148.

Linearity

� Setup

– Keep the settings on the timer/counter and the oscillo-

scope from Step Response X10.

– Select Att X1 for Input A on the timer/counter.

– Change the period time of the pulse signal from the

pulse generator to 2 ms.

– Reconnect the signal from the power splitter to Input A

on the timer/counter.

– Set the oscilloscope to 200 �s/div and Input B to

100 mV/div (including probe).

7-12 Input Amplifiers

Overcompensation

Undercompensation

Correct compensation

Input signal

Figure 7-3 Linearity compensation.

� Adjustment

– Connect the probe tip to the center hole of J7.The sur-


ure 7-2.

– Adjust R196 until the pulses on the oscilloscope look

the same. See Figure 7-3. Use a screwdriver type of ad-

justment tool.

– Check Step Response X1, repeat Step Response X1 and

Linearity several times if necessary.


nect the probe tip to J9. Adjust R268.

Sensitivity

� Setup

– Keep the settings on the counter from Linearity.

� Adjustment

– Connect the DMM to the test points X34 (+) and X35

(-). See Figure 7-2.

– Adjust R197 until the DMM reads +17 ± 0.2 mV. Use a

screwdriver type of adjustment tool.

Don't forget to resolder the RF shield.

Power Supply

� Setup




� Adjustment

– Connect the DMM to test point X9 and ground (metal

shield lid over input amplifiers). See Figure 6-4 and

Figure 7-4.

– Adjust the +5 V trimmer on the AC/DC power supply

board with a screwdriver type of adjustment tool until

the DMM reads +5.10 ± 0.005 V.

– Check that the voltage from the AC/DC power supply at

X26 is +15 ± 0.7 V.

– Check that the voltage from the AC/DC power supply at

X21 is -15 ± 0.7 V.

Note: Adjusting the +5 V does not affect other settings in the

instrument.


� Setup




– Connect a 1 MHz sinewave signal with amplitude 0.1

Vrms (0.28 Vpp) into 50 � from an LF synthesizer to the

external reference input. Use a 50 � termination on the

input.

– Set an oscilloscope with X10 probe to 10 �s/div,

100 mV/div (including probe) and AC coupling.

� Adjustment

– Connect the probe to X19. There are two ground pads in

the vicinity. See Figure 7-5.

– Adjust C442 to maximum amplitude. Use a screwdriver

type of adjustment tool.

Power Supply 7-13

+5 V adj.

J17X26

X9

X21

GND

AC/DC BOARD

RF SHIELD

Figure 7-4 Adjusting +5 V and checking +15 V and -15 V.

C442

X19

GNDGND

AC/DC BOARD

J22 J25J23 J26 J21

Figure 7-5 Adjusting the external reference input.

Internal ReferenceOscillators

Adjustment of the different timebase oscillators is described

under Calibration earlier in this chapter.

RF Input 3 GHz

Note: The 8 GHz prescaler can not be adjusted.

� Setup




– Select measurement function FREQUENCY C.

– Set the signal generator to 1000 ± 25 MHz with ampli-

tude 5.9 ± 0.5 mVrms (-31.5 ± 0.5 dBm)

� Adjustment

– Connect the signal to Input C on the timer/counter.

NOTE: Before beginning any adjustments, the RF input

must have been in operation for at least a few minutes

to let it reach normal operating temperature.

– Turn the potentiometer on the prescaler board fully

counterclockwise. See Figure 7-6.

– Check that the timer/counter stops measuring.

– Turn the potentiometer slowly clockwise until the

timer/counter starts measuring.

– Check the display of the timer/counter, it shall show

1000 ± 25 MHz.

7-14 Internal Reference Oscillators

AC/DC BOARD

MAIN INPUTAMPLIFIERS

3 GHz PRESCALER

INITIAL SETTING:FULLY CCW

Figure 7-6 Adjusting the 3 GHz RF prescaler.

Chapter 8

Replacement Parts

8-2 Replacement Parts, Introduction

Note: There are two variants of the main PCB, Version A and

Version B. Refer to page III for closer information.

Standard Parts

Electrical and mechanical replacement parts can be obtained

through your local service organization or representative. How-

ever, many of the standard components can be obtained from

other local suppliers. Before purchasing or ordering replace-

ments parts, check the parts list for value, tolerance, rating, and

description.

If the value of the physical component differs from what is de-

scribed in the parts list, you should always replace the part with

the same value as originally mounted.

NOTE: Physical size and shape of a compo-

nent may affect the performance of the

instrument, particularly at high frequencies.

Always use direct replacements unless it is

known that a substitute will not degrade the

performance of the instrument.

Special Parts

In addition to standard electronic components, the following

special components are used:

– Components that are manufactured or selected by Fluke to

meet specific performance requirements.

– Components that are important for the safety of the instru-

ment.

Both types of components may be replaced only by components

obtained through your local service organization.

Timebase reference oscillators, except those based on standard

crystals, cannot be repaired in the field but are replaced by

means of a factory exchange procedure. The same repair method

applies to the prescaler options.

22

25

2418

17

19

20

13

1428

27

29

34

(inside)

Figure 8-1 Case.

Introduction

Item Figure Description Part number

13 8-1 Washer 3,2 ST FZ 252261024004

14 8-1 Screw MRT 3x6 482250211658

17, 19,

20, 27

8-1 Case feet, complete kit 403110066480

18 8-1 Cover assembly 403110066440

22 8-1 Rear foot 532246241719

24 8-1 Spring washer M4 KBA 4.3 252261024006

25 8-1 Screw MRT 4x16 532250221491

28 8-1 Stand-up bracket 403110048770

29 8-1 Plug grey decorative M5 403110502860

34 8-1 Shielding strip 403110055450

3 8-2 Profile support 403110053200

4 8-2 Main board 403110066470

5 8-2 Shield main board 403110065990

6 8-2 Toroid core 532252610545

9 8-2 Washer 4x10x2 PA6-6 403110049600

10 8-2 Screw RTK ST3.5x10 252220207024

12 8-2 Distance nut M3x12 403110059470

13 8-2 Washer 3,2 ST FZ 252261024004

14 8-2 Screw MRT 3x6 482250211658

15 8-2 Screw MFT-TT 4x12 532250213553

16 8-2 Power Module 403110066170

21 8-2 Screw MRT-TT 4x16 532250213552

23 8-2 Cable assembly, power supply 403110066150

30 8-2 Distance nut M3x14 403110048880

33 8-2 Shield, power supply 403110066430

35 8-2 Screw M3x12 532250221642

36 8-2 Profile support 403110053210

37 8-2 Warning label, high voltage 403111645530

38 8-2 Shielding strip USB 403110055470

61 8-2 Connector BNC 532226710004

Item Figure Description Part number

65 8-2 Solder lug 403110058390

70 8-2 Holder BNC 403110065870

1 8-3 Rear plate 90-ser 403110065890

2 8-3 Rear overlay 90-ser 403110066080

3 8-3 Connector BNC 532226710004

4 8-3 Screw MFT-TT 3x8 482250211713

5 8-3 Screw MFT 4x16 252220306037

6 8-3 Solder lug 403110058390

8 8-3 Lock washer AZ4.3 ST FZ 252262027007

9 8-3 Spring washer M4 KBA4.3 482253080076

12 8-3 Nut M4 482250510825

13 8-3 Mains filter 403110066450

14 8-3 Fan 12VDC 40x40x15mm 403110502850

15 8-3 Screw MFX 3x22 403110503450

16 8-3 Washer 3,2 ST FZ 252261024004

17 8-3 Nut M3 482250510758

18 8-3 Grounding wire 403110066460

2 8-4 Display 403110065800

2 8-4 Keypad 403110065980

7 8-4 Front unit board, complete 403110066160

8 8-4 Front overlay PM6690 403110066060

13 8-4 Washer 3,2 ST FZ 252261024004

18 8-4 Cover assembly 403110066440

26 8-4 Screw MRT-TT 3x8 482250211691

32 8-4 Gasket, display 403110066120

Replacement Parts, Mechanical Parts 8-3

Mechanical Parts

8-4 Replacement Parts, Mechanical Parts

6

9

4

5

15

10

14

13

23

12

14

13

15

314

13

30

33

37

21

3835

13

36

16

6

70

61

65

Figure 8-2 Exploded view of chassis.

6

1

8

12

9

23

4

5

9

12

13

8

18

BlueBrown

Green/Yellow

14

17

16

15

Figure 8-3 Rear panel.

Pos Description Part Number

Main board complete 403110066470

B1 OCXO (PM6690/_5_) 403110065330

B1 OCXO (PM6690/_6_) 403110065340

B3 CRYSTAL 32kHz MC-406 242254301419

B4 CRYSTAL 6MHz HC49/USM SMD 403110056520



C1 CAPACITOR 47pF 5% 50V NP0 0805 222286115479

C10 CAPACITOR 100nF 20% 25V X7R 0805 532212613638





C104 CAPACITOR 2.20 µF 20%6.3V 3.2X1.6 MOLD 532212410685


C106 CAPACITOR TRIM 2.5-10pF 500VDC AT2320-2 202280000247





C111 CAPACITOR TRIM 3-10pF TZBX4Z100BB110 532212550306


C115 CAPACITOR 3.9pF ±0.25pF 500V NP0 1206 225201471398














































































C192 CAPACITOR 100µF 6.3V 202202900655




















C213 CAPACITOR 6.80 µF 20% 16V 6.0X3.2 MOLD 532212410687

Replacement Parts, Main Board, Version A 8-5

Main Board, Version A








































C250 CAPACITOR 100µF 6.3V 202202900655

C251 CAPACITOR 22µF 6.3V 202202900654

C252 CAPACITOR 220µF 20% 10V 0810 SMD 222215364221





C257 CAPACITOR 100µF 6.3V 202202900655

C258 CAPACITOR 22µF 6.3V 202202900654



















































































8-6 Replacement Parts, Main Board, Version A



C339 CAPACITOR 15 µF 20%6.3V 6.0X3.2 MOLD 532212411418










C350 CAPACITOR 1 µF 20% 16V 3.2X1.6 MOLD 403102151080



































C393 CAPACITOR 100µF 6.3V 202202900655

C394 CAPACITOR 100µF 6.3V 202202900655



C397 CAPACITOR 100µF 6.3V 202202900655

C398 CAPACITOR 100µF 6.3V 202202900655





C403 CAPACITOR 4.7µF 20% 35V 0405 SMD 222215360478


































C443 CAPACITOR 2.2pF±0.25pF 50V NP0 0805 402230160091





































































D10 DIODE 0.10A BAV99 SOT23 532213034337

D11 DIODE 0.10A BAV99 SOT23 532213034337

D12 DIODE 0.10A BAV99 SOT23 532213034337

D13 DIODE 0.10A BAV99 SOT23 532213034337

D14 DIODE 0.10A BAT18 35V 1PF SOT23 532213032076


D17 DIODE 0.10A BAV99 SOT23 532213034337

D18 DIODE 0.10A BAV99 SOT23 532213034337

D19 DIODE 0.10A BAV99 SOT23 532213034337

D20 DIODE 0.10A BAV99 SOT23 532213034337



D23 DIODE VARACTOR SMV1255-073 SC07 403105000001


D25 DIODE 0.10A BAV99 SOT23 532213034337

D26 DIODE 0.10A BAV99 SOT23 532213034337

D27 DIODE 0.10A BAV99 SOT23 532213034337

D28 DIODE 0.10A BAV99 SOT23 532213034337

D29 DIODE 0.10A BAV99 SOT23 532213034337

D30 DIODE 0.10A BAV99 SOT23 532213034337

D31 DIODE 0.10A BAV99 SOT23 532213034337

D32 DIODE 0.10A BAV99 SOT23 532213034337

D33 DIODE 0.10A BAV99 SOT23 532213034337

D34 DIODE 0.10A BAV99 SOT23 532213034337

D35 DIODE 0.10A BAV99 SOT23 532213034337

D36 DIODE 0.10A BAV99 SOT23 532213034337

D37 DIODE 0.10A BAV99 SOT23 532213034337

D46 DIODE 0.10A BAV99 SOT23 532213034337

D48 DIODE 0.10A BAV99 SOT23 532213034337

D50 DIODE BYD17G 400V 1.5A SOD87 933812240701


D52 DIODE 0.10A BAV99 SOT23 532213034337

D53 DIODE-SCH 0.2A BAT54S SOT23 SMD 482213082262

J12 CONNECTOR 20POL HEADER SMD 15-91-0200 242202505569

J13 CONNECTOR 2x10 POL SMD 242202518436



J17 CONNECTOR 6POS 39-28-1065 242202508091

J22 CONNECTOR 4POL USB PCB 242203300291

J25 CONNECTOR 24 POL 57LE-20240-77OOD35G 242202504832

J28 CONNECTOR HEADER 2POS SMD AMP

6-176125-2

403110571100

K1 RELAY SMD UD2 5V 242213207707

K2 RELAY SMD UD2 5V 242213207707

K3 RELAY SMD UD2 5V 242213207707

K4 RELAY SMD UD2 5V 242213207707

K5 RELAY SMD UD2 5V 242213207707

K6 RELAY SMD UD2 5V 242213207707

K7 RELAY SMD UD2 5V 242213207707

K8 RELAY SMD UD2 5V 242213207707

L10 FILTER-EMI BLM21A102SPT Z=1KOhm 0.2A

R=0.6Ohm

242254943133

L11 FILTER-EMI BLM41PF800S 242254900035


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133

L15 CHOKE 4.3µH 1.6A 242253600772



R=0.6Ohm

242254943133


L19 CHOKE 4.3µH 1.6A 242253600772




R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133

L28 CHOKE 4.3µH 1.6A 242253600772


R=0.6Ohm

242254943133

L3 CHOKE 100nH SMD 242253600773


R=0.6Ohm

242254943133

L31 CHOKE 4.70µH 5% LQH1N4R7J 242253594048


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133

L37 CHOKE 4.70µH 5% LQH1N4R7J 242253594048

L38 CHOKE 4.70µH 5% LQH1N4R7J 242253594048


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133




R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133



R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133

L63 CHOKE 1µH 20% B82412-A1102-M 241254100458


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133


R=0.6Ohm

242254943133

M10 SHIELD-CLIP SMD 242201520096




















Q1 TRANSISTOR BF513 .03A20V SOT23 482213060686

Q10 TRANSI-HF N SMD BFR93A 35mA 12V SOT23 532213060705

Q11 TRANSISTOR 25 MA BFR92A 20V SOT23 532213060647

Q12 TRANSISTOR BFT92 25MA 15V SOT23 933347730701





Q17 TRANSISTOR 0.5A BC807-25 45V SOT23 532213060845

Q18 TRANSISTOR BFS17 .05A 15V SOT23 532213040781


Q2 TRANSISTOR HF N SMD BFR93A 35mA 12V

SOT23

532213060705





Q24 TRANSISTOR BSR12 0.1A 15V SOT23 532213044743


Q26 TRANSISTOR BC847B .1A45V SOT23 482213060511
























Q48 TRANSISTOR BCP51 1.5A 45V SOT223 532213062639





Q53 TRANSI-NPN SMD BFG16A SOT223 1.5GHz 1W 934002210701




Q57 TRANSI-LF N BCP54 1A 45V SOT223 1.33W 933917180115










R1 RESISTOR 4.7 kOhm 1% 0.1W 100PPM 0805 403100247020




R11 RESISTOR 10 kOhm 1% 0.1W 100PPM 0805 532211712499



R132 RESISTOR 100 Ohm 1% 0.1W 100PPM 0805 532211712497

R133 RESISTOR 470 Ohm 1% .125W 100PPM 1206 482205154701


R135 RESISTOR 10.0 Ohm 1% 0.125W 100PPM 1206 482205110109



R138 RESISTOR 000 Ohm 0.1W 100PPM 0805 403100200000

R139 RESISTOR 1kOhm 1% 0.1W 100PPM 0805 532211712498



R141 RESISTOR 470 kOhm 1% .125W 100PPM 1206 482205154704








R149 RESISTOR 10 MOhm 10% 0.25W RC-01 1206 482205110105



R153 RESISTOR 3.30 Ohm 1% .125W 100PPM 1206 532211711788





R158 RESISTOR 1.00 MOhm 1% 0.125W 100PPM 1206 482205110105

















R174 RESISTOR 12.0 kOhm 1% .125W 100PPM 1206 532211710968
















R191 RESISTOR 1 MOhm 1% 0.1W 100PPM 0805 403100210050






R196 POTENTIOMETER 100 kOhm 3304X-1-104 212236200842

R197 POTENTIOMETER 2 kOhm 25% 4mm 403101000001
























R221 RESISTOR 10 MOhm 10% 0.25W RC-01 1206 482205110105



R224 SENSOR-TEMP KTY82/120 532213010682







R231 RESISTOR 1.00 MOhm 1% 0.125W 100PPM 1206 482205110105















R246 RESISTOR 12.0 kOhm 1% .125W 100PPM 1206 532211710968
























R268 POTENTIOMETER 100 kOhm 3304X-1-104 212236200842



































































































































































































































































































































R610 RESISTOR 1.2 MOhm 1% 0.125W 1206 403100112050

R611 RESISTOR 1.2 MOhm 1% 0.125W 1206 403100112050































U1 IC-OPAMP LMC6081 932220497682

U11 IC-FPGA 932220399682

U116 IC-ANA MAX6355TWUT-T 932220433682

U117 IC-REG MAX1927REUB 932220434682

U118 IC-REG MAX1927REUB 932220434682

U12 IC-DIG ECLIPS MC10E104 932202821682

U122 IC-REF 2.5V LT1009CD-2.5 2.5V±0.2% 15ppm 932207993701

U123 IC-REG LM2991S 932220425682

U124 IC-REG LM2991S 932220425682

U126 IC-REG LP2951 932207501682

U127 IC-SWITCH MIC2505-1BM 932220437682

U128 IC-ANA SMPS CTR LTC3412 932220430682

U129 IC-REG LM2940CS-12 932211044682

U13 IC-CPU TA7S20-60QC 932220406682

U130 IC-REG LM2940CS-12 932211044682

U131 IC-COMP MAX961 SO8 4.5ns 932219434682

U132 IC-ANA ADG719 SPDT-SWITCH MSOP-8 403106000008




U14 IC-CMOS SN74LVC125AD 932220193682

U15 IC-SRAM K4S281632D 932220429682

U16 IC-SRAM K4S281632D 932220429682

U17 IC-PROM Am29LV640MH 932220405682



U18 IC-OPAMP OPA277 932214746682

U19 IC-OPAMP OPA277 932214746682

U2 IC-OPAMP LMC6081 932220497682

U20 IC-OMV ADC 10BIT ADC1061C1WM SO20 932218755682




U24 IC-OPAMP OPA277 932214746682

U26 IC-OPAMP OPA277 932214746682

U28 IC-OPAMP OPA277 932214746682

U29 IC-CMOS 74LVC74AD 935260734701

U3 IC-COMP ADCMP565BP 932220403682

U30 IC-OP AMP LM358 x2 SMD SO8 532220982941

U31 IC-OPAMP LMH6624 932220398682

U32 IC-CMOS 74LVC74AD 935260734701

U33 IC-CMOS 74ALVC00 932220496682

U34 IC-DIG BUS ISP1181B 935271360701


U37 IC-DIG BUS TNT4882 932220397682

U38 IC-CMOS TRANSL3-5V 74LVC4245AD 935260749701

U39 IC-DIG TEMP SENSOR LM75 932212511682

U4 IC-CMOS 74ALVC00 932220496682

U40 IC-DIG BUS I2C PCA9555PW 935269569701


U41 IC-CMOS 74HCT126D SMD SO14 933757050701

U42 IC-OP AMP KM4100IT5 SOT23-5 260MHz 403106000002




U46 IC-CONV DAC MAX5156BCEE 12bit dual 403106000001

U47 IC-CMOS 74LVC1G04GV LOG 1xINV 935271788125


U5 IC-DAC 12BIT LTC8043 932220498682

U50 IC-OP AMP TLE2022C SMD SO 932207300701

U6 IC-OP AMP OPA277 932214746682

U7 IC-OP AMP OPA277 932214746682


U9 IC-ANALOG-PLL 200MHz ADF4001BRU 932220404682

8-14 Replacement Parts, Front Unit

26

7

2

188

32

13

Figure 8-4 Display assembly.

Front Unit

Pos. Description Part number

Display board complete. 403110066160








C16 CAPACITOR 22µF 6.3V 202202900654


C18 CAPACITOR 22µF 6.3V 202202900654


C20 CAPACITOR 2.20 UF 20% 35V 6.0X3.2 MOLD 403102172280




C24 CAPACITOR 22µF 6.3V 202202900654

C25 CAPACITOR 22µF 6.3V 202202900654








D1 DIODE 10BQ030 932220426682

D2 LED 3mm RED FLATTOP 932221032682

D3 LED 3mm GREEN FLATTOP 932221031682



E1 DISPLAY 90-SER 403110065800

J1 CONNECTOR 20POL FPC SMD 242202518448

J2 CONNECTOR 20POL FPC SMD 242202518448


L1 CHOKE 10uH SMD 942253600592


R=0.6ohm

242254943133
























U4 IC-ANA SMPS CTR TPS61045 932220427682

Replacement Parts, Front Unit 8-15


B1 OSCILLATOR 10MHZ OCXO P/N 738Y4084 403110061800

B2 CRYSTAL 10MHz HC-49U/13 532224282118




B7 CRYSTAL 11.2896 MHz HC49/USM SMD 403110056560









C106 CAPACITOR-TRIM 2.5-10pF 500VDC AT2320-2 532212550689






C111 CAPACITOR-TRIM 3-10pF TZBX4Z100BB110 532212550306











































































C186 CAPACITOR 68pF 1% 50V NPO 0805 222286118689







C192 CAPACITOR 100µF 6.3V 202202900655



















8-16 Replacement Parts, Main Board, Version B

Main Board, Version B











































C257 CAPACITOR 100µF 6.3V 202202900655

C258 CAPACITOR 22µF 6.3V 202202900654



























C285 CAPACITOR 470pF 10% 50V X7R 0402 403102040471




























































Replacement Parts, Main Board, Version B 8-17












C350 CAPACITOR 1 µF 20% 16V 3.2X1.6 MOLD 532212410686




C354 CAPACITOR 22µF 6.3V 202202900654





C36 CAPACITOR 22µF 6.3V 202202900654































C390 CAPACITOR 100µF 6.3V 202202900655



C393 CAPACITOR 100µF 6.3V 202202900655

C394 CAPACITOR 100µF 6.3V 202202900655



C397 CAPACITOR 100µF 6.3V 202202900655

C398 CAPACITOR 100µF 6.3V 202202900655

























C423 CAPACITOR 100µF 6.3V 202202900655


C425 CAPACITOR 100µF 6.3V 202202900655


















C443 CAPACITOR 2.2pF±0.25pF 50V NP0 0805 222286115228
















































C499 CAPACITOR 22µF 6.3V 202202900654


C500 CAPACITOR 100µF 6.3V 202202900655





























C539 CAPACITOR 100µF 6.3V 202202900655












C561 CAPACITOR 100µF 6.3V 202202900655


C562 CAPACITOR 100µF 6.3V 202202900655

C563 CAPACITOR 100µF 6.3V 202202900655

C564 CAPACITOR 100µF 6.3V 202202900655










C575 CAPACITOR 100µF 6.3V 202202900655















D10 DIODE 0.10A BAV99 SOT23 532213034337

D11 DIODE 0.10A BAV99 SOT23 532213034337

D12 DIODE 0.10A BAV99 SOT23 532213034337

D13 DIODE 0.10A BAV99 SOT23 532213034337



D17 DIODE 0.10A BAV99 SOT23 532213034337

D18 DIODE 0.10A BAV99 SOT23 532213034337

D19 DIODE 0.10A BAV99 SOT23 532213034337

D20 DIODE 0.10A BAV99 SOT23 532213034337





D25 DIODE 0.10A BAV99 SOT23 933215370701

D25 DIODE 0.10A BAV99 SOT23 532213034337

D26 DIODE 0.10A BAV99 SOT23 532213034337

D27 DIODE 0.10A BAV99 SOT23 532213034337

D28 DIODE 0.10A BAV99 SOT23 532213034337

D29 DIODE 0.10A BAV99 SOT23 532213034337

D30 DIODE 0.10A BAV99 SOT23 532213034337

D31 DIODE 0.10A BAV99 SOT23 532213034337

D32 DIODE 0.10A BAV99 SOT23 532213034337

D33 DIODE 0.10A BAV99 SOT23 532213034337

D34 DIODE 0.10A BAV99 SOT23 532213034337

D35 DIODE 0.10A BAV99 SOT23 532213034337

D36 DIODE 0.10A BAV99 SOT23 532213034337

D37 DIODE 0.10A BAV99 SOT23 532213034337

D46 DIODE 0.10A BAV99 SOT23 532213034337

D48 DIODE 0.10A BAV99 SOT23 532213034337



D52 DIODE 0.10A BAV99 SOT23 532213034337

D53 DIODE-SCH 0.2A BAT54S SOT23 SMD 482213082262


J13 CONNECTOR 2x10 POL SMD 242202518436




J17 CONNECTOR 6POS 39-28-1065 242202508091

J22 CONNECTOR 4POL USB PCB 242203300291

J25 CONNECTOR 24 POL 57LE-20240-77OOD35G 532226760148

J28 CONNECTOR HEADER 2POS SMD AMP

6-176125-2

403110571100

J3 CONNECTOR 2 POL F095 SINGLE ROW 532226544074

K1 RELAY SMD UD2 5V 242213207707

K2 RELAY SMD UD2 5V 242213207707

K3 RELAY SMD UD2 5V 242213207707

K4 RELAY SMD UD2 5V 242213207707

K5 RELAY SMD UD2 5V 242213207707

K6 RELAY SMD UD2 5V 242213207707

K7 RELAY SMD UD2 5V 242213207707

K8 RELAY SMD UD2 5V 242213207707

L10 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A

R=0.6ohm

242254943133



R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133



R=0.6ohm

242254943133


R=0.6ohm

242254943133

L19 CHOKE 4.3µH 1.6A 242253600772




R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133

L28 CHOKE 4.3µH 1.6A 242253600772


R=0.6ohm

242254943133

L3 CHOKE 100nH SMD 242253600773


R=0.6ohm

242254943133

L31 CHOKE 4.70µH 5% LQH1N4R7J 242253594048


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133

L37 CHOKE 4.70µH 5% LQH1N4R7J 242253594048

L38 CHOKE 4.70µH 5% LQH1N4R7J 242253594048


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133



R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133



R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133

L63 CHOKE 1µH 20% B82412-A1102-M 241254100458




R=0.6ohm

242254943133


R=0.6ohm

242254943133


R=0.6ohm

242254943133









































































Q57 TRANSI-LF N BCP54 1A 45V SOT223 1.33W 933917180115











R1 RESISTOR 4.7 KOHM 1% 0.1W 100PPM 0805 403100247020


R11 RESISTOR 10kohm 1% 0.1W 100PPM 0805 532211712499



R132 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 532211712497

R133 RESISTOR 470 ohm 1% .125W 100PPM 1206 482205154701


R135 RESISTOR 10.0 ohm 1% 0.125W 100PPM 1206 482205110109



R138 RESISTOR 000 ohm 0.1W 100PPM 0805 403100200000




R141 RESISTOR 470 kohm 1% .125W 100PPM 1206 532211680447

R142 RESISTOR 120 Kohm 1% .125W 100PPM 1206 482205151204





R147 RESISTOR 330 OHM 1% 0.1W 100PPM 0805 403100233010


R149 RESISTOR 10 MOHM 10% 0.25W RC-01 1206 482205110106



R153 RESISTOR 3.30 ohm 1% .125W 100PPM 1206 532211711788


R155 RESISTOR 47 KOHM 1% 0.1W 100PPM 0805 403100247030



R158 RESISTOR 1.00Mohm 1% 0.125W 100PPM 1206 482205110105
















R174 RESISTOR 12.0kohm 1% .125W 100PPM 1206 532211710968
















R191 RESISTOR 1 MOHM 1% 0.1W 100PPM 0805 403100210050







R196 POTENTIOMETER 100kohm 3304X-1-104 532210110841

R197 POTENTIOMETER 2 KOHM 25% 4mm 403101000001



























R221 RESISTOR 10 MOHM 10% 0.25W RC-01 1206 482205110106



R224 SENSOR-TEMP KTY82/120 532213010682








R231 RESISTOR 1.00Mohm 1% 0.125W 100PPM 1206 482205110105















R246 RESISTOR 12.0kohm 1% .125W 100PPM 1206 532211710968






















R268 POTENTIOMETER 100kohm 3304X-1-104 532210110841






























































































































































































































































































































R610 RESISTOR 1.2 Mohm 1% 0.125W 1206 403100112050

R611 RESISTOR 1.2 Mohm 1% 0.125W 1206 403100112050




























































U1 IC-OPAMP LMC6081 932220497682

U11 IC-FPGA 932220399682

U116 IC-ANA MAX6355TWUT-T 932220433682

U118 IC-REG MAX1927REUB 932220434682

U12 IC-DIG ECLIPS MC10E104 482220931775

U122 IC-REF 2.5V LT1009CD-2.5 2.5Vñ0.2% 15ppm 532220990434

U123 IC-REG LM2991S 932220425682

U124 IC-REG LM2991S 932220425682

U126 IC-REG LP2951 932207501682

U127 IC-SWITCH MIC2505-1BM 932220437682

U128 IC-ANA SMPS CTR LTC3412 932220430682

U129 IC-REG LM2940CS-12 932211044682

U13 IC-CPU LH79524 403106000012

U130 IC-REG LM2940CS-12 932211044682

U131 IC-COMP MAX961 SO8 4.5ns 932219434682





U15 IC-SRAM K4S281632D 932220429682

U16 IC-SRAM K4S281632D 932220429682

U17 IC-PROM Am29LV640MH 932220405682

U18 IC-OPAMP OPA277 932214746682

U19 IC-OPAMP OPA277 932214746682

U2 IC-OPAMP LMC6081 932220497682





U24 IC-OPAMP OPA277 932214746682


U26 IC-OPAMP OPA277 932214746682

U28 IC-OPAMP OPA277 932214746682

U29 IC-CMOS 74LVC74AD 935260734701

U3 IC-COMP ADCMP565BP 932220403682


U31 IC-OPAMP LMH6624 932220398682

U32 IC-CMOS 74LVC74AD 935260734701

U33 IC-CMOS 74ALVC00 932220496682

U34 IC-DIG BUS ISP1181B 935271360701



U37 IC-DIG BUS TNT4882 932220397682

U38 IC-CMOS TRANSL3-5V 74LVC4245AD 935260749701

U39 IC-DIG TEMP SENSOR LM75 932212511682

U4 IC-CMOS 74ALVC00 932220496682







U46 IC-CONV DAC MAX5156BCEE 12bit dual 403106000001



U5 IC-DAC 12BIT LTC8043 932220498682

U50 IC-OP AMP TLE2022C SMD SO 532220990433

U52 IC-CMOS 74LVC162245ADGG TSSOP48 403106000010



U56 IC-CMOS 74LVC08AD SO14 403106000009

U57 IC-CMOS 74LVC1G02GV NOR SOT753 403106000011

U6 IC-OPAMP OPA277 932214746682



U7 IC-OPAMP OPA277 932214746682



U9 IC-ANALOG-PLL 200MHz ADF4001BRU 932220404682

NOTE: The preceding parts lists for the two versions of the main

PCB are both complete for the sake of simplicity. Conse-

quently there is redundant information.

Parts Unique to Version A


B3 CRYSTAL 32kHz MC-406 242254301419



R549 RESISTOR 1 kOhm 1% 0.125W 1206 403100110020

U13 IC-CPU TA7S20-60QC 932220406682

U14 IC-CMOS SN74LVC125AD 932220193682

Parts Unique to Version B


B7 CRYSTAL 11.2896 MHz HC49/USM SMD 403110056560


























R548 RESISTOR 91 kohm 1% 0.1W 100PPM 0805 403100291030

U13 IC-CPU LH79524 403106000012





U56 IC-CMOS 74LVC08AD SO14 403106000009

U57 IC-CMOS 74LVC1G02GV NOR SOT753 403106000011

NOTE: The two tables above are meant to pinpoint the parts that

are unique to the respective version. Consequently they

are excerpts from the complete lists.

Parts Common to Version Aand Version B

NOTE 1: Only parts with changed quantities are shown.

NOTE 2: + means that the part has been added.

- means that the part has been deleted.

Changes refer to Version A.

+ Pos - Pos Part Number

C36,C354,C499 C251 202202900654

C384,C390,C423,C425,C500,

C539,C561,C562,C563,C564,

C575

C250 202202900655

C253 C252,C256,C259,C431 222215364221

C254 222286115221

C565 222286115229

C33,C27 C248,C249 222286115279

C302,C343,C373,C379,C391,

C392,C413,C418,C419,C420,

C502,C537,C538,C543,C544,

C549,C560,C566,C573,C576,

C577,C578,C579,C580,C582

222286148102

C34,C35,C37,C38,C248,

C249,C301,C320,C581

C535 222286148103

C253 222286115681

C277,C505,C517,C540,C541,

C542,C545,C546,C547,C548,

C567

C255,C278,C281,C282,

C283,C284,C285,C286,

C287,C288,C301,C302,

C304,C305,C306,C307,

C308,C309,C320

222291016749

L15 242253600772

L66,L67 L18 242254900035

L18 242254943133

R585,R586,R587,R590,R591 403100115010

R368,R369 403100122040

R549,R662 403100147010

R637,R639,R644,R647,R648,

R649,R650,R651,R653,R654,

R655,R661,R667

403100210010

R523 403100210020

R20,R21,R22,R23,R425,

R541,R629,R630,R631,R632,

R663,R664,R665,R666,R668

403100210030

R638 403100210090

R590,R591 403100215010

R633,R634 R356,R357,R365,R629,R630 403100222020

R669 403100222090

R370 403100233030

8-26 Replacement Parts, Parts Unique to Version A

+ Pos - Pos Part Number

R585,R586,R587 403100247010

R523,R628,R635,R636 403100247020

R371 403100247030

C431 403102131590

U117 932220434682

U25 933757050701

Replacement Parts, Parts Common to Version A and Version B 8-27


8-28 Replacement Parts, Parts Common to Version A and Version B

Chapter 9

Schematic Diagrams

How to Read the Diagrams

This chapter contains circuit diagrams and component layout

information.

Signals

The signal designations reflect the functions. ADCDATA0,

for instance, means DATA BIT 0 from the ADC (Analog/Dig-

ital Converter).

Three different types of graphic symbols are used to mark ref-

erences for continued connection somewhere else in the dia-

gram.

This arrow is used if the reference to a supply

voltage is directed to a point located on the same

sheet. The example means that the supply voltage

-2.1V can also be found elsewhere on the same sheet.

This arrow is used if the reference to a supply

voltage or a signal is directed to a point located

on another sheet. The example means that the

supply voltage +3.3VD goes to sheet 1, 2, 5, 7 and 8.

A broken line with a signal designation label

means that this particular signal can also be

found elsewhere on the same sheet.

Circuit Symbols

The diagrams are computer-drawn. The symbols conform to

IEC standards. These symbols are designed to be logical and

easy to read.

The component number is written above the symbol. The type

number is written below the symbol

Inside the symbol there is sometimes an abbreviated descrip-

tion of the circuit’s function.

Pin numbers are written outside the symbol and, if the circuit

is complex, the pin functions are written inside.

A small circle on a pin indicates that the input/output inverts

the signal.

The signal flow through the circuit is normally from left to

right.

Resistors, Capacitors, Diodes,Transistors and Other Components.

These components are similar to the old-fashioned,

hand-drawn symbols. They have their component numbers

above or beside the symbol and their value or type number be-

low the component number.

Component Numbers

Letters Components

B Crystals and crystal filters

C Capacitors

D Diodes

F Fuses

J Jumpers and connectors

K Relays

L Coils

P Connectors

Q Transistors

R Resistors

U ICs

X Test points

The numbers that follow are sequential and serve as sche-

matic diagram and layout identifiers together with the leading

character.

9-2 Schematic Diagrams

-2.1V

+3.3VD 1,2,5,7,8

PLL LOCK

Version A





Schematic Diagrams 9-3





Main Board, PCB 1, Component Layout


Main Schematic


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

DOUT

MD9MD10MD11MD12MD13MD14MD15

MA8MA9MA10MA11MA12MA13MA14MA15MA16MA17MA18MA19MA20

MA6MA7

MA8

MA1MA0

MA2

MA9

MA3

MA10MA11MA12MA13MA14MA15MA16MA17MA18MA19MA20

MA6MA7MA1

MA4

MA0

MA5

MD16MD17MD18MD19MD20MD21MD22MD23MD24MD25MD26MD27MD28MD29MD30MD31

MD0MD1MD2MD3MD4MD5MD6MD7MD8

DIN

RB LOCK

MD[0..31]

MA[0..21]

+5VTR

+3.3VMEM

+5VA

+3.3VD

+12VA

-12VA

+5VTR

+3.3VMEM+3.3VMEM

+5VA

+3.3VD

+12VA

-12VA

+5VTR

RUBI DI UMOSC.

L56

BLM41P800S

L56

BLM41P800S

X7X7

46

5

8

U122

LT1009CD

U122

LT1009CD

C315100NFC315100NF

C375

1nF

C375

1nF

C381100NFC381100NF

C377

15UF-6.3V

C377

15UF-6.3V

R297

Not Used

R297

Not Used

L4

Not Used

L4

Not Used

R11

10K

R11

10K

C311100NFC311100NF

L27

BLM21A102S

L27

BLM21A102S

R10

2.2K

R10

2.2K

C380100NF

C380100NF

V+

7

V-

4

U26BOPA277U26BOPA277

C196Not UsedC196Not Used

VD

D1

VD

D1

4

VD

D2

7

VD

DQ

3

VD

DQ

9

VD

DQ

43

VD

DQ

49

VS

S2

8

VS

S4

1

VS

S5

4

VS

SQ

6

VS

SQ

12

VS

SQ

46

VS

SQ

52

U15BK4S561632DU15BK4S561632D

X13X13

RefA4

FBA3

OutA2

DACU46A

MAX5156

DACU46A

MAX5156

3

26

1 8

-

+

U28A

OPA277

-

+

U28A

OPA277

C198

Not Used

C198

Not Used

J27ANOT USED MINICOAX-3J27ANOT USED MINICOAX-3

R298

Not Used

R298

Not Used

R4451.5KR4451.5K

C485NOT USED

C485NOT USED

A023

A124

A225

A326

A429

A530

A631

A732

A833

A934

A1022

A1135

A1236

I/O02

I/O14

I/O25

I/O37

I/O48

I/O510

I/O611

I/O713

I/O842

I/O944

I/O1045

I/O1147

I/O1248

I/O1350

I/O1451

I/O1553

RAS18

WE16

CS19

CAS17

LDQM15

BA020

BA121

UDQM39

CKE37

CLK38

U15A

K4S281632D

U15A

K4S281632D

1234567891011121314151617181920

J11

2X10 SMD

J11

2X10 SMD

C310100NFC310100NF

C383100NFC383100NF

VD

D1

VD

D1

4

VD

D2

7

VD

DQ

3

VD

DQ

9

VD

DQ

43

VD

DQ

49

VS

S2

8

VS

S4

1

VS

S5

4

VS

SQ

6

VS

SQ

12

VS

SQ

46

VS

SQ

52

U16BK4S561632DU16BK4S561632D

C378

1nF

C378

1nF

R6

100

R6

100

R13

10K

R13

10K

A023

A124

A225

A326

A429

A530

A631

A732

A833

A934

A1022

A1135

A1236

I/O02

I/O14

I/O25

I/O37

I/O48

I/O510

I/O611

I/O713

I/O842

I/O944

I/O1045

I/O1147

I/O1248

I/O1350

I/O1451

I/O1553

RAS18

WE16

CS19

CAS17

LDQM15

BA020

BA121

UDQM39

CKE37

CLK38

U16A

K4S281632D

U16A

K4S281632D

R299

Not Used

R299

Not Used

C200

Not Used

C200

Not Used

R12

10K

R12

10K

C320100NF

C320100NF

R567

100

R567

100

C312100NFC312100NF

V+

7

V-

4


SDA1

SCL2

A07

A16

A25

O.S.3

TMP

U39A

LM75

TMP

U39A

LM75

H1

3.5 PLATED

SDASCL

10MHZ_RUBIDIUM

RB LOCK

DIN

DOUT

+15VU

MA

[0..2

1]

MD[0..31]

CS

WE

CL

K

CK

E

LOAD TRGLVL A

LOAD TRGLVL B

SPICLK

SPIDATA

VREFTRG_LVL_A

TRG_LVL_B

RDN

WRN

RESETHER

CSETN

A[0..4]

D[0..15]

40_MHZ

IRGET

GATEOUT

+5VPO

+3.3VMEM

+3.3VIF

+3.3V_U4

+3.3VD

+5VD

+5VA

POWERON

+3.3VD

+12VA

-12VA

20_MHZ

GN

D4

VC

C8

U39BLM75U39BLM75

UPO11

DOut10

PDL12

CL5

CS6

DIn7

SClk8

DAC

U46C

MAX5156

DAC

U46C

MAX5156

C313100NFC313100NF

C374100NFC374100NF

C37622UF-35V

C37622UF-35V

R566

100

R566

100

R302

Not Used

R302

Not Used

X6X6

C382100NFC382100NF 3

26

1 8

-

+

U26A

OPA277

-

+

U26A

OPA277

C199

Not Used

C199

Not Used

VD

D1

6

DG

ND

9

AG

ND

1

U46DMAX5156U46DMAX5156

RefB13

FBB14

OutB15

DACU46B

MAX5156

DACU46B

MAX5156

C316100NFC316100NF

R300

Not Used

R300

Not Used

3

26

1 8

-

+

U24A

OPA277

-

+

U24A

OPA277

C482NOT USED

C482NOT USED

R14

10K

R14

10K

C317100NFC317100NF

V+

7

V-

4


C314100NFC314100NF



CPU, Memories and Parts of the Counter Circuit, PCB 1, sheet 1(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

F16

D4

D14

F6

F10

F22

D6

A0

F28

F24

D10D9

F17

F31

F0

F11

D3

F7

F23

D13

A4

F8

F3

F29

D5

F2

F25

F18

D[0..15]

D8 F9

F1

F12

F14

A3

D2

A[0..4]

D12F4

F26

F19

A2

F15D1

F[0..31]

D15

D7

F21

F5

D0

A1

F30

D11

F13

F27

F20

A0A1A2A3A4

D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0

F0F1F2F3F4F5F6F7F8F9F10F11F12F13F14F15F16F17F18F19F20F21F22F23F24F25F26F27F28F29F30F31

MD10

MD[0..31]

MD0

MD12

MD25

MD23

MA5MA13

MD2MA1

MD29

MA12

MA21MA20

MA4

MD15

MA18

MD8

MD16

MD1

MA15

MD1MA2

MD19

MD22

MD18

MD8

MA4

MA11

MD9

MA21

MA[0..21]

MD0

MA3

MA0

MA9

MA19

MD21

MA13

MD30

MA17

MD4

MD26

MD14

MA8

MD31

MA17

MA6

MD15MD7

MD13

MD3

MD20

MA7MD6

MA8

MD10MD2

MD27

MA20

MA7

MA0

MD5

MD24

MD11MA10

MA16

MA1

MA14

MA6

MA16

MA3MA2

MD17

MD28

MD13

MA15

MD12MD11

MA14

MA19

MD7

MA9

MD5

MA18

MA5MD6

MD14

MD4

MA11MA12

MD3

MD9MA10

SDA 1,5

SCL 1,5

CS 1CLK 1CKE 1WE 1

DIN 1

DOUT1

MA[0..21] 1MD[0..31] 1

A[0..4]

D[0..15]

WRN

RDN

CSETN

+3.3VMEM 1

IRGET

SPIDATA 1,6

SPICLK 1,6

+2.5V

+1.8V

+3.3VMEM

+3.3VCPU

+3.3VDISP

+5VD

+3.3VCPU

+3.3VCPU

+3.3VMEM

+3.3VCPU+2.5V+1.8V

+3.3VCPU

+3.3VCPU

+3.3VCPU

+1.8V

+2.5V

+5VD+3.3VDISP

+3.3VCPU

+3.3VCPU

+3.3VMEM

+3.3VMEM

POWERON7

+5VU7

GET8

PROGN5

IRQUSB8

IRQGPIB8

+3.3VD1,5,6,7,8

TRALED4

TRBLED4

GATELED4

STBYLED7

+5VD1,5,6,7,8

SDA 1,5

SCL 1,5

FANCTRL 7STD OSC TRIM 6

SPICLK 1,6

OFFCTRL 7

SPIDATA 1,6

RDN 8

DONE 5

INITN 5

CSGPIBN 8

CSUSBN 8

DIRGPIB 8

CSETN

WRN 8

ONCTRL 7

A[0..4] 8

D[0..15] 8

J T AGCONNECT OR

DI SPL AYBOARDCONNECT OR

C268100NF

C268100NF

5 6

4

U14B

LVC125

U14B

LVC125

FIFODATA31108

FIFODATA30109

FIFODATA29110

FIFODATA28111

FIFODATA27112

FIFODATA26113

FIFODATA25114

FIFODATA24115

FIFODATA23116

FIFODATA22120

FIFODATA21121

FIFODATA20122

FIFODATA19123

FIFODATA18125

FIFODATA17126

FIFODATA16127

FIFODATA15129

FIFODATA14132

FIFODATA13133

FIFODATA12134

FIFODATA11135

FIFODATA10136

FIFODATA9138

FIFODATA8139

FIFODATA7140

FIFODATA6141

FIFODATA5145

FIFODATA4146

FIFODATA3147

FIFODATA2148

FIFODATA1149

FIFODATA0150

FIFOCLK101

FIFOWR151

FIFOALERT152

UPEMPTY102

INTERRUPT99

MPCLK182

CS180

RD97

WR98

A088

A189

A293

A394

A495

DB0160

DB1161

DB2162

DB3163

DB4164

DB5165

DB6166

DB7167

DB8168

DB9169

DB10173

DB11174

DB12175

DB13176

DB14178

DB15179

RESET187

DIN153

CCLK155

PROGRAM106

DONE104

INIT107

GET87

DOUT154

COUNTER CIRCUIT

U11C

SPARTANIIE

COUNTER CIRCUIT

U11C

SPARTANIIE

C299100NFC299100NF

C264100NFC264100NF

C250

100UF-6.3V

C250

100UF-6.3V

C303100NF

C303100NF

R369220KR369220K

C25822UF-6.3VC25822UF-6.3V

X30X30

L21

BLM41P800S

L21

BLM41P800S

R3652.2KR3652.2K

R370

33K

R370

33K

C272100NF

C272100NF

F060

F161

F262

F363

F464

F565

F666

F767

F870

F971

F1074

F1175

F1276

F1377

F1479

F1580

F1681

F1785

F1886

F1989

F2090

F2191

F2292

F2393

F2494

F2595

F2696

F2798

F2899

F29100

F30101

F31102

FEMPTY103

FFIQ57

FWR58

FCLK106

RESFPGA31

MPCLK32

CSFPGA33

CSUSB124

CSETHER125

CSGPIB126

DIRGPIB127

WRB108

RDB109

AB0117

AB1116

AB2115

AB3114

AB4113

DB1534

DB1439

DB1340

DB1241

DB1142

DB944

DB1043

DB846

DB747

DB648

DB549

DB450

DB351

DB254

DB155

DB056

IRQFPGA107

INITCLK135

INITDATA136

CPU

U13B

TA7S20

CPU

U13B

TA7S20

R36422KR36422K

X56X56

123456789

1011121314151617181920

J13

2X10 90DEG SMD

J13

2X10 90DEG SMD

X29X29

C304100NFC304100NF

X57X57

VC

C14

GN

D7

U14ELVC125U14ELVC125

C309100NFC309100NF

R366

NOT USED

R366

NOT USED

C308100NFC308100NF

C291100NF

C291100NF

R373

33K

R373

33K

A031

A126

A225

A324

A423

A522

A621

A720

A810

A99

A108

A117

A126

A135

A144

A153

A1654

A1719

A1818

A1911

A2012

A2115

I/O035

I/O137

I/O239

I/O341

I/O444

I/O546

I/O648

I/O750

I/O836

I/O938

I/O1040

I/O1142

I/O1245

I/O1347

I/O1449

I/O1551

OE34

WE13

CE32

RESET14

WP/ACC16

BYTE53

RY/BY17

U17A

AM29LV640MH

U17A

AM29LV640MH

R36110KR36110K

C257

100UF-6.3V

C257

100UF-6.3V

C279100NFC279100NF

C301100NF

C301100NF

C274100NF

C274100NF

X55X55

1M

R358

1M

R358

C271100NF

C271100NF

C296100NFC296100NF

R37447KR37447K

C284100NFC284100NF

R35510KR35510K

C282100NF

C282100NF

R14.7K

R14.7K

C295100NFC295100NF

R614

100

R614

100

C290100NF

C290100NF

L16

BLM41P800S

L16

BLM41P800S

C306100NFC306100NF

C294100NF

C294100NF

L18

BLM41P800S

L18

BLM41P800S

C24927PFC24927PF

B3

32KHZ

B3

32KHZ

C261220UF-10VC261220UF-10V

C259220UF-10VC259220UF-10V

R36010KR36010K

C302100NF

C302100NF

C307100NFC307100NF

1234567891011121314151617181920

J12

2X10 SMD

J12

2X10 SMD

L15

4.3UH

L15

4.3UH

2 3

1

U14A

LVC125

U14A

LVC125

R586150R586150

C265100NF

C265100NF

R37268KR37268K

C262680PFC262680PF

C298100NFC298100NF

C266100NF

C266100NF

L20

BLM41P800S

L20

BLM41P800S

C267100NF

C267100NF

R587150R587150

X60X60

C289100NF

C289100NF

C263

220PF

C263

220PF

C278100NFC278100NF

C280100NFC280100NF

C318100NFC318100NF

C252220UF-10VC252220UF-10V

C300100NFC300100NF

R36722KR36722K

GND2

MR3

VCC16

VCC24

RSTIN5

RST1

U116

MAX6355

U116

MAX6355

C273100NF

C273100NF

R362100

R362100

C319100NFC319100NF

9 8

10

U14C

LVC125

U14C

LVC125

C275100NFC275100NF

C270100NF

C270100NF

C283100NFC283100NF

C269100NF

C269100NF

C286100NFC286100NF

R368220KR368220K

X59X59

C276100NFC276100NF

C288100NFC288100NF

C305100NFC305100NF

C254

220PF

C254

220PF

R37147KR37147K

R3543.3KR3543.3K

R3562.2KR3562.2K

L17

BLM21A102S

L17

BLM21A102S

C256220UF-10VC256220UF-10V

R3572.2KR3572.2K

C25122UF-6.3VC25122UF-6.3V

A0110

A1111

A2118

A3119

A4122

A5123

A6128

A7129

A8131

A9132

A10137

A11138

A12141

A13142

A14145

A15146

A1620

A1721

A1829

A1930

A2035

A2136

CE016

OE17

SDCE026

SDCE127

SDCLK178

SDCKE179

WE183

D0147

D1148

D2150

D3151

D4152

D5153

D6154

D7155

D8158

D9159

D10160

D11161

D12164

D13165

D14166

D15167

D16168

D17169

D18185

D19186

D20187

D21188

D22189

D23190

D24197

D25198

D26202

D27203

D2811

D2912

D3013

D3114

SLAVE82

RST84

VSYS83

TDI6

TMS7

TCK8

TDO9

XO

UT

3

XIN

2

CPU

U13A

TA7S20

CPU

U13A

TA7S20

X31X31

C293100NF

C293100NF

L19

4.3UH

L19

4.3UH

VC

C43

VIO

29

VS

S52

VS

S33

U17BAM29LV640MHU17BAM29LV640MH

IN9

SHDN6

COMP5

REF3

PWM1

GND2

POK10

FB4

LX8

PGND7

REG

U117

MAX1927

REG

U117

MAX1927

R615

100

R615

100

R3533.3KR3533.3K

R585150R585150

C297100NFC297100NF

GN

D1

GN

D1

2

GN

D1

9

GN

D2

5

GN

D3

2

GN

D3

9

GN

D5

1

GN

D6

5

GN

D7

2

GN

D7

9

GN

D8

5

GN

D9

2

GN

D10

3

GN

D11

7

GN

D12

4

GN

D13

1

GN

D13

7

GN

D14

4

GN

D15

8

GN

D17

0

GN

D17

7

GN

D18

3

GN

D19

0

GN

D19

7

VC

CO

13

VC

CO

26

VC

CO

38

VC

CO

53

VC

CO

66

VC

CO

78

VC

CO

91

VC

CO

105

VC

CO

118

VC

CO

130

VC

CO

143

VC

CO

156

VC

CO

171

VC

CO

184

VC

CO

196

VC

CO

208

VC

CIN

T1

4

VC

CIN

T2

8

VC

CIN

T3

7

VC

CIN

T6

7

VC

CIN

T7

6

VC

CIN

T9

0

VC

CIN

T1

19

VC

CIN

T1

28

VC

CIN

T1

42

VC

CIN

T1

72

VC

CIN

T1

86

VC

CIN

T1

95

COUNTER CIRCUITU11DSPARTANIIE

COUNTER CIRCUITU11DSPARTANIIE

X32X32

X2X2

R35910KR35910K

12 11

13

U14D

LVC125

U14D

LVC125

SDA22

SCL23

PWM-1215

SPICLK143

SPIDATA144

SOUT170

SIN171

IRQGPIB174

IRQETHER175

IRQUSB180

IRQKEYB181

PWM-8184

U0162

ONOFF193

LCDCLK194

LCDRAN195

CONTRAST196

LCDFRM199

LCDLD200

LCDD3204

LCDD2205

LCDD1206

LCDD0207

CPU

U13C

TA7S20

CPU

U13C

TA7S20

X58X58

C281100NF

C281100NF

IN9

SHDN6

COMP5

REF3

PWM1

GND2

POK10

FB4

LX8

PGND7

REG

U118

MAX1927

REG

U118

MAX1927

C24827PFC24827PF

X33X33

X1X1

GN

DP

LL

1

GN

D2

5

GN

D7

3

GN

D13

4

GN

D17

7

VC

CP

LL

4

VC

C24

VC

C72

VC

C133

VC

C176

GN

DIO

5

GN

DIO

10

GN

DIO

19

GN

DIO

28

GN

DIO

38

GN

DIO

45

GN

DIO

53

GN

DIO

59

GN

DIO

69

GN

DIO

78

GN

DIO

88

GN

DIO

97

GN

DIO

10

5

GN

DIO

11

2

GN

DIO

12

1

GN

DIO

13

0

GN

DIO

14

0

GN

DIO

14

9

GN

DIO

15

7

GN

DIO

16

3

GN

DIO

17

3

GN

DIO

18

2

GN

DIO

19

2

GN

DIO

20

1

VC

CIO

18

VC

CIO

37

VC

CIO

52

VC

CIO

68

VC

CIO

87

VC

CIO

104

VC

CIO

120

VC

CIO

139

VC

CIO

156

VC

CIO

172

VC

CIO

191

VC

CIO

208

CPU

U13DTA7S20

CPU

U13DTA7S20

C285100NFC285100NF

C253680PFC253680PF

X28X28

C287100NFC287100NF

C292100NF

C292100NF

C255100NFC255100NF

R36310KR36310K



Input Amplifiers, PCB 1, sheet 2(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

TRG_LVL_A

TRG_LVL_B

FILTER_A

FILTER_BTRG_LVL_B

TRG_LVL_A

FILTER_B

FILTER_A

TRG_LVL_A1

TRG_LVL_B1

+12VI

+5VAI+5VBI

-5.2VAI-5.2VBI

+5VAI-5.2VAI

-5.2VAI

+5VAI+12VI

+5VAI

-5.2VAI

+12VI

-5.2VBI

-5.2VBI

+5VBI+12VI +5VBI

-5.2VBI

+12VI

-5.2VAI

-5.2VAI

-5.2VBI

-5.2VAI

+5VBI+5VAI

-5.2VAI

+5VBI

+5VBI

-5.2VBI -5.2VAI

+5VAI

+5VAI5+5VBI5

-5.2VAI5-5.2VBI5

+12VI5

IMP A5ATT A5

AC/DC A5COM A5

FILTER_A5

IMP B5ATT B5

AC/DC B5COM B5

FILTER_B5

REAR PANEL INPUT A9

REAR PANEL INPUT B9

AN 6

B 6

BN 6

A 6

LE

LE

R24082R24082

L55

BLM21A102S

L55

BLM21A102S

R244

47

R244

47

1M

R191

1M

R191

R613

1K

R613

1K

10NC12510NC125

C9

1.5pF-500V

C9

1.5pF-500V

BAV99

D10

BAV99

D10

C143

3-10PF

C143

3-10PF

R184220R184220

R241

68

R241

68

R177120R177120

34

2K2A

UD2

K2A

UD2

C1622.2UF-6.3VC1622.2UF-6.3V

Q13BFR92AQ13BFR92A

R181150R181150

R248120R248120

R163120R163120

R188470KR188470K

R251150R251150

R167

47

R167

47

10NC503

10NC503

C151100NF

C151100NF

34

2K7A

UD2

K7A

UD2

BAV99

D17

BAV99

D17

R16047R16047

10NC23910NC239

R19947KR19947K

R169

68

R169

68

BAV99

D20

BAV99

D20

34

2K4A

UD2

K4A

UD2

10NC243

10NC243

3

26

-

+

U2A

LMC6081A

-

+

U2A

LMC6081A

C12222NF-200VC12222NF-200V

R215

680K

R215

680K

BFT93Q7BFT93Q7

R147330R147330

10N

C237

10N

C237

Q5BFR92AQ5BFR92A

R237120R237120

R212

47

R212

47

C132100NF

C132100NF

J10

BNC-COAX

J10

BNC-COAX


X34X34

Q16BFR92AQ16BFR92A

R1901KR1901K

BAV99

D31

BAV99

D31

R148680KR148680K

R24612KR24612K

C20

27PF

C20

27PF

18

+

-

K6CUD2

+

-

K6CUD2

R19510K

R19510K

C140

47P

C140

47P

R254470KR254470K

10NC22710NC227

Q10BFR93AQ10BFR93A

342

K1A

UD2

K1A

UD2

R216

220K

R216

220K

C2410PF-500V

C2410PF-500V

R2111KR2111K

Q14BFR92AQ14BFR92A

R610

1.2M

R610

1.2M

10NC15610NC156

R193

330

R193

330

R236120R236120

R253150R253150

C133100NFC133100NF

R247120R247120

R1801KR1801K

C117

3.9pF-100V

C117

3.9pF-100V

R182470KR182470K

R220680KR220680K

R213

470K

R213

470K

10NC15810NC158

V+

8

V-

4

U50CTLE2022CU50CTLE2022C

10NC24010NC240

R179150R179150

R2333.3R2333.3

10NC210NC2

10NC16310NC163

10NC246

10NC246

C7

1.5pF-500V

C7

1.5pF-500V

R229470KR229470K

X35X35

R17068R17068

C123

2.2UF-6.3V

C123

2.2UF-6.3V

C126100NF

C126100NF

18

+

-

K1CUD2

+

-

K1CUD2

R15547KR15547K

R194

27

R194

27

BAV99

D34

BAV99

D34

BAV99

D12

BAV99

D12

Q2BFR93AQ2BFR93A

R223

47

R223

47

V+

7

V-

4

U1BLMC6081AU1BLMC6081A

R18310KR18310K

C496

2.5-10PF/250V

C496

2.5-10PF/250V

R165120R165120

R145

100

R145

100

65

7K4B

UD2

K4B

UD2

10NC24410NC244

C139100NFC139100NF

R189470KR189470K

C165100NFC165100NF

R17412KR17412K

R18727R18727

10NC22910NC229

R132

100

R132

100

R176120R176120

R207

100

R207

100

100KR159100KR159

R138

0

R138

0

R149

10M

R149

10M

R1972K

R1972K


10NC12410NC124

J7A

NOT USED MINICOAX-3-5

J7A


R201

470

R201

470

18

+

-

K8CUD2

+

-

K8CUD2

R1581MR1581M

R135

10

R135

10

L54

BLM21A102S

L54

BLM21A102S

C146

27pF

C146

27pF

C159100NFC159100NF

C107100NFC107100NF

R250120R250120

10NC10010NC100 C101

100NFC101100NF

BAV99

D18

BAV99

D18R6111.2MR6111.2M

R2241K

R2241K

BAV99

D33

BAV99

D33

10N

C19

10N

C19

R196100KR196100K

R218

47

R218

47

R171

4.7K

R171

4.7K

R234120R234120

X36X36

1M

R262

1M

R262R260470KR260470K

R222

47

R222

47

C213.9PF-500V

C213.9PF-500V

C129100NFC129100NF

R214

120K

R214

120K

BAT18

D15

BAT18

D15

3

26

-

+

U1A

LMC6081A

-

+

U1A

LMC6081A

R202100R202100

10NC504

10NC504

C131

3.9pF-500V

C131

3.9pF-500V

R249120R249120

BAT18

D14

BAT18

D14

R261470KR261470K

R146

47

R146

47

10NC310NC3

BAV99

D30

BAV99

D30

R1533.3R1533.3

C103100NFC103100NF

10N

C235

10N

C235

C152220pC152220p

C160100NFC160100NF

C11839pFC11839pF

R235120R235120

C115

3.9pF-100V

C115

3.9pF-100V

10NC16410NC164

R24268R24268

R258

120K

R258

120K

R1920R1920

C166100NFC166100NF

R142

120K

R142

120K

R1851KR1851K

R239

47

R239

47

C120220pC120220p

R16882R16882

18

+

-

K5CUD2

+

-

K5CUD2

10NC10510NC105

18

+

-

K2CUD2

+

-

K2CUD2

R157

47

R157

47

BAT18

D21

BAT18

D21

R141

470K

R141

470K

BFT93Q15BFT93Q15

BFT92Q4BFT92Q4

R268100KR268100K

X37X37

R243

4.7K

R243

4.7K

R156470KR156470K

C116

3-10PF

C116

3-10PF

10NC24110NC241

Q3BFR92AQ3BFR92A

C149

3.9pF-100V

C149

3.9pF-100V

R210

100

R210

100

C102100NF

C102100NF

LE5

LE7

+10

-9

OUT2

OUT3

U3A

ADCMP565

U3A

ADCMP565

R1391KR1391K

6

57

+

-

U50B

TLE2022C

+

-

U50B

TLE2022C

C134

2.2UF-6.3V

C134

2.2UF-6.3V

R19815KR19815K

10NC24710NC247

10NC23010NC230

R2311MR2311M

BAV99

D11

BAV99

D11

Q1BF513Q1BF513

C15039pFC15039pF

BAV99

D36

BAV99

D36

C22

27PF

C22

27PF

C127100NF

C127100NF

BAT18

D22

BAT18

D22

R200

470

R200

470

100K

R154

100K

R154

C99

3.9pF-500V

C99

3.9pF-500V

R2031.5KR2031.5K


BAV99

D32

BAV99

D32

R133

470

R133

470

R136100R136100

BFT92Q12BFT92Q12

R208100R208100

C233.9PF-500V

C233.9PF-500V

R238150R238150

10NC24510NC245

10N

C231

10N

C231

C130100NFC130100NF

65

7K6B

UD2

K6B

UD2

342

K5A

UD2

K5A

UD2

BAV99

D37

BAV99

D37

10NC24210NC242

R2521KR2521K

R256220R256220

10NC23610NC236

Q6BFR92AQ6BFR92A

R166150R166150

R2253.3R2253.3

C110

22NF-200V

C110

22NF-200V

18

+

-

K4CUD2

+

-

K4CUD2

Q9BF513Q9BF513

BAV99

D19

BAV99

D19

V+

7

V-

4

U2BLMC6081AU2BLMC6081A

PCB-Pattern

L16NH

PCB-Pattern

L16NH

C6

1.5PF-500V

C6

1.5PF-500V

C108

100NF

C108

100NF

C148

3-10PF

C148

3-10PF

C111

3-10PF

C111

3-10PF

R143

680K

R143

680K

10N

C232

10N

C232

PCB-Pattern

L26NH

PCB-Pattern

L26NH

R137100R137100

LE17

LE15

+12

-13

OUT20

OUT19

U3B

ADCMP565

U3B

ADCMP565

R273

120K

R273

120K

R217

100

R217

100

10N

C238

10N

C238

R209

0

R209

0

C155

2.2UF-6.3V

C155

2.2UF-6.3V

34

2

K8A

UD2

K8A

UD2

R612

1K

R612

1K

C497

2.5-10PF/250V

C497

2.5-10PF/250V

C128100NFC128100NF

R134

470

R134

470

R22747

R22747

R2571KR2571K

R25510KR25510K

18

+

-

K7CUD2

+

-

K7CUD2

2

31

+

-

U50A

TLE2022C

+

-

U50A

TLE2022C

R25927R25927

10NC13610NC136

R144

220K

R144

220KR151

47

R151

47

C15422NF-200VC15422NF-200V

BAV99

D35

BAV99

D35

10NC15710NC157

R206

10

R206

10

R265

100

R265

100

R172

47

R172

47

R26710KR26710K

C141

22NF-200V

C141

22NF-200V

C138100NFC138100NF

R219330R219330

100KR232100KR232

Q8BFR92AQ8BFR92A

R230

47

R230

47

R245

47

R245

47

R175120R175120

R150

47

R150

47

R162120R162120

18

+

-

K3CUD2

+

-

K3CUD2

R164120R164120

C1612.2UF-6.3V

C1612.2UF-6.3V


R22847KR22847K

R264

27

R264

27

R1613.3R1613.3

C106

2.5-10PF/250V

C106

2.5-10PF/250V

R205180KR205180K

R140

47

R140

47

R2660R2660

C114

27pF

C114

27pF

Q11BFR92AQ11BFR92A

C147

3.9pF-100V

C147

3.9pF-100V

GN

D4

VC

C1

4

VE

E8

GN

D18

GN

D6

GN

D16

U3CADCMP565U3CADCMP565

J8

BNC-COAX

J8

BNC-COAX

J9A


J9A


BAV99

D13

BAV99

D13

C109

47P

C109

47P

R221

10M

R221

10M

C2510PF-500V

C2510PF-500V

65

7K2B

UD2

K2B

UD2

R263

330

R263

330

100K

R226

100K

R226

R173

47

R173

47

65

7

K8B

UD2

K8B

UD2

C119100NF

C119100NF

R178120R178120

34

2K6A

UD2

K6A

UD2

34

2K3A

UD2

K3A

UD2

C8

1.5PF-500V

C8

1.5PF-500V

10NC22810NC228

C1042.2UF-6.3VC1042.2UF-6.3V

C137

2.5-10PF/250V

C137

2.5-10PF/250V



Interpolators, PCB 1, sheet 3(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

AD9

AD7

AD2

AD10

AD2

AD2

AD8

AD4

AD6

AD5

AD9

AD1

AD5

AD1

AD8

AD3

AD6

AD10

AD8AD7

R3

AD9

AD7

AD10

AD5

AD7

R1

AD4

R0

AD6

AD4

AD5

AD6

AD8

AD8

AD6

AD2

AD10

AD3

AD3

R2

AD1

AD3

AD7

AD9

AD1

AD10

AD4AD5

AD9

R[0..3]

R0

R1

R2

R3

AD[1..10]

AD

1

AD

2

AD

3

AD

4

VREF1

GATEOUT

+12VINT

+12VREF

-12VINT

+5VINT

+5VAD

+12VINT

+12VINT

+12VINT

+12VINT

+12VREF

+12VREF

+5VAD+5VAD+5VAD+5VAD

-12VINT

+12VINT

+5VINT

+5VINT

+12VA1,5,6,7

-12VA1,6,7,8

+5VA1,5,6

TRALED 2

TRBLED 2

GATELED 2

INTREF 8

Hi REF

L o REF

C346

100p

C346

100p

R521

330

R521

330

R658

10

R658

10

R399

2.2K

R399

2.2K

R6432.2KR6432.2K

Q36

BF513

Q36

BF513

R380

10

R380

10C32668PC32668P

R540

22

R540

22

C334

Not_Used

C334

Not_Used

C323

100NF

C323

100NF

R6302.2KR6302.2K

C292.2UF-6.3VC292.2UF-6.3V

V+

5

V-

2

U44BKM4100U44BKM4100

R6452.2KR6452.2K

R416100R416100

R385

47

R385

47

R660

10

R660

10

C352

100NF

C352

100NF

L62

BLM21A102S

L62

BLM21A102S

V+

5

V-

2


VD

D4

GN

D3

U135BADG719U135BADG719

10nC53110nC531

C338100pC338100p

C522100nC522100n

R520

330

R520

330

C33915UF-6.3VC33915UF-6.3V

C36715UF-6.3VC36715UF-6.3V

C3501uF-16VC3501uF-16V

R398

100

R398

100

8

21

6

U134A

ADG719

U134A

ADG719

R409

47

R409

47

BFT92Q29BFT92Q29

C530

6.8u-16V

C530

6.8u-16V

C342

100NF

C342

100NF

C324

100NF

C324

100NF

R391

1.5K

R391

1.5K

VC

C1

+V

CC

6

GN

D10

U21BADC1061U21BADC1061

C523100nC523100n

C509

Not Used

C509

Not UsedC325

Not_Used

C325

Not_Used

C368100NFC368100NF

R377

2.2K

R377

2.2K

C5076.8u-16V

C5076.8u-16V

BFT92

Q59

BFT92

Q59

8

21

6

U132A

ADG719

U132A

ADG719

X54X54

BFT92Q31BFT92Q31

C510

Not Used

C510

Not Used

INT2

S/H3

RD4

CS5

VREF-7

VIN8

VREF+9

DB218

DB119

DB020

DB614

DB515

DB416

DB317

DB713

DB812

DB911

U23A

ADC1061

U23A

ADC1061

C524100nC524100n

R383

47

R383

47

R379

1.5K

R379

1.5K

L23

BLM21A102S

L23

BLM21A102S

L22

BLM21A102S

L22

BLM21A102S

3

41

-

+

U45A

KM4100

-

+

U45A

KM4100

8

21

6

U135A

ADG719

U135A

ADG719

R519

330

R519

330

R528

22

R528

22

C351100NFC351100NF

C35568PC35568P

R3964.7KR3964.7K

C322.2UF-6.3VC322.2UF-6.3V

INT2

S/H3

RD4

CS5

VREF-7

VIN8

VREF+9

DB218

DB119

DB020

DB614

DB515

DB416

DB317

DB713

DB812

DB911

U22A

ADC1061

U22A

ADC1061C34510PFC34510PF

C349

100p

C349

100p

C529

6.8u-16V

C529

6.8u-16V

C353

100NF

C353

100NF

VC

C1

+V

CC

6

GN

D10


BFT92Q34BFT92Q34

C36415UF-6.3VC36415UF-6.3V

INT2

S/H3

RD4

CS5

VREF-7

VIN8

VREF+9

DB218

DB119

DB020

DB614

DB515

DB416

DB317

DB713

DB812

DB911

U21A

ADC1061

U21A

ADC1061

INT2

S/H3

RD4

CS5

VREF-7

VIN8

VREF+9

DB218

DB119

DB020

DB614

DB515

DB416

DB317

DB713

DB812

DB911

U20A

ADC1061

U20A

ADC1061

R517

330

R517

330

R381100R381100

L25

BLM21A102S

L25

BLM21A102S

R375

4.7K

R375

4.7K

C33368PC33368P

VD

D4

GN

D3


BFT92

Q65

BFT92

Q65

10nC53210nC532

V+

5

V-

2


C14100NFC14100NF

R505

1K

R505

1K

Q33

BF513

Q33

BF513

X3X3 X53X53

C512

Not Used

C512

Not Used

L59

BLM21A102S

L59

BLM21A102S

R413

100

R413

100

R382

100

R382

100

R6402.2KR6402.2K

R397

47

R397

47

R39415KR39415K

R411

2.2K

R411

2.2K

R515

330

R515

330

R656

1.5K

R656

1.5K

C302.2UF-6.3VC302.2UF-6.3V

ERRP055

SH056

CS057

RD058

SH160

CS161

RD162

ERRP263

SH264

CS268

RD269

ERRP370

SH371

RES082

ERRP159

RES183

RES284

CS373

RD374

RES386

RDY044

RDY145

RDY246

RDY347

ADCDATA023

ADCDATA124

ADCDATA227

ADCDATA329

ADCDATA433

ADCDATA534

ADCDATA635

ADCDATA736

ADCDATA840

ADCDATA941

ADCDATA1042

ADCDATA1143

INTREFOUT10

PULSEOUT194

TRIGALED191

TRIGBLED192

GATELED198

M052

M150

M254

TMS2

TCK207

TDI159

TDO157

COUNTER CIRCUIT

U11A

SPARTANIIE

COUNTER CIRCUIT

U11A

SPARTANIIE

C341

100NF

C341

100NF

C528

6.8u-16V

C528

6.8u-16V

R6422.2KR6422.2K

R41082R41082

R403100R403100

R6292.2KR6292.2K

10n

C527

10n

C527

C12100NFC12100NF

R393

47

R393

47

10nC332

10nC332

BFT92

Q63

BFT92

Q63

C328100pC328100p

C363100NFC363100NF

VC

C1

+V

CC

6

GN

D10


R6442.2KR6442.2K

R481

1K

R481

1K

3

41

-

+

U44A

KM4100

-

+

U44A

KM4100

L26

BLM21A102S

L26

BLM21A102S

R40482R40482

C322100pC322100p

V+

7

V-

4


C335100NFC335100NF

C359100NFC359100NF

BFT92

Q64

BFT92

Q64

R507330R507330

VD

D4

GN

D3


10nC53310nC533

R40710KR40710K

L24

BLM21A102S

L24

BLM21A102S

8

21

6

U133A

ADG719

U133A

ADG719

R40610KR40610K

V+

5

V-

2


C321100NFC321100NF

R392

4.7K

R392

4.7K

10nC526

10nC526

3

26

1 8

-

+

U19AOPA277

-

+

U19AOPA277

R40047KR40047K

C36115UF-6.3VC36115UF-6.3V

R402

47

R402

47

Q28

BF513

Q28

BF513

Q30

BF513

Q30

BF513

R539

22

R539

22

L60

BLM21A102S

L60

BLM21A102S

C34468PC34468P

V+

7

V-

4


R484

1K

R484

1K

C362100NFC362100NF

R659

10

R659

10

C329

100p

C329

100p

R65282R65282

VC

C1

+V

CC

6

GN

D10


C348100pC348100p

R386

100

R386

100

R387

2.2K

R387

2.2K

R508330R508330

R3844.7KR3844.7K

C370100NFC370100NF

C331

100NF

C331

100NF

R485

1K

R485

1K

3

41

-

+

U42A

KM4100

-

+

U42A

KM4100

C15100NFC15100NF

R657

1.5K

R657

1.5K

X4X4C340100NF

C340100NF

3

26

1 8

-

+

U18AOPA277

-

+

U18AOPA277

C35815UF-6.3VC35815UF-6.3V

R511330R511330

R4084.7KR4084.7K

C360100NFC360100NF

C356

Not_Used

C356

Not_Used

R524

22

R524

22

C33710PFC33710PF

C511

Not Used

C511

Not Used

R395

33K

R395

33K

R37682R37682

10n

C525

10n

C525

VD

D4

GN

D3


C34715UF-6.3VC34715UF-6.3V

10nC53410nC534

R405

47

R405

47

BFT92Q37BFT92Q37

C357100NFC357100NF

R522

330

R522

330

R389

47

R389

47

C312.2UF-6.3VC312.2UF-6.3V

C366100NFC366100NF

L61

BLM21A102S

L61

BLM21A102S

C369100NFC369100NF

Q32BC847BQ32BC847B

R414

100

R414

100

C330

100NF

C330

100NF

R390100R390100

Q35BC847BQ35BC847B

R513330R513330

3

41

-

+

U43A

KM4100

-

+

U43A

KM4100

C336

Not_Used

C336

Not_Used

R417

47

R417

47

C327

100p

C327

100p

R378

47

R378

47

C365100NFC365100NF

R6412.2KR6412.2K

C13100NFC13100NF



Miscellaneous, PCB 1, sheet 4(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

PREKOD0

PREKOD2

PREKOD1

+5VD

+3.3VD

+5VD

+5VD

+5VD

+5VD

+5VD

+5VD

+5VD

+5VD

+3.3VD

SDA1,2SCL1,2

DONE2INITN2

+5VD1,2,6,7,8

+3.3VD1,2,6,7,8

OPCLK6+3.3VD1,2,6,7,8

SCL1,2SDA1,2

PRESC ON6

+5VD1,2,6,7,8

+12VA1,4,6,7

PRESC TEST6

+5VD1,2,6,7,8

OPTION6

OPCLK6+3.3VD1,2,6,7,8

SCL1,2SDA1,2

+12VA1,4,6,7

+5VA1,4,6

-5.2VI7

+15VD7,8

PROGN 2

IMP A 3

ATT A 3

AC/DC A 3

COM A 3

FILTER_B 3

BURST 6

C 6

BURST 6

FILTER_A 3

+12VI 3

+5VAI 3

+5VBI 3

-5.2VAI 3

-5.2VBI 3

AC/DC B 3

IMP B 3

ATT B 3

COM B 3

-5.2VA6,7

-5.2VA6,7

PRES CAL ERCONNECT OR

OPT I ONCONNECT OR

L39

BLM21A102S

L39

BLM21A102S

123456789

1011121314151617181920

J16

2X10 SMD

J16

2X10 SMD

R441

6.8K

R441

6.8K

C372100NFC372100NF

L47

BLM21A102S

L47

BLM21A102S

C478100NFC478100NF

R431

0

R431

0

C483100NFC483100NF

C473100NFC473100NF

R4372.2KR4372.2K

R4234.7KR4234.7K

R444

6.8K

R444

6.8K

L42

BLM21A102S

L42

BLM21A102S

C484100NFC484100NF

C471100NFC471100NF

R4

10K

R4

10K

123456789

1011121314151617181920

J15

2X10 SMD

J15

2X10 SMD

L48

BLM21A102S

L48

BLM21A102S

R4302.2KR4302.2K

R564

330

R564

330

C486100NFC486100NF

R4342.2KR4342.2K

R435

6.8K

R435

6.8K

Q41BC807-25Q41BC807-25

Q42BC807-25Q42BC807-25

VD

D24

VS

S12

U40BPCA9555U40BPCA9555

L46

BLM21A102S

L46

BLM21A102S

R428

NOT USED

R428

NOT USED

L51

BLM21A102S

L51

BLM21A102S

R565

330

R565

330

L50

BLM21A102S

L50

BLM21A102S

A021

A12

A23

SCL22

SDA23

I/O0.04

I/O0.15

I/O0.26

I/O0.37

I/O0.48

I/O0.59

I/O0.610

I/O0.711

I/O1.013

I/O1.114

I/O1.215

I/O1.316

I/O1.417

I/O1.518

I/O1.619

I/O1.720

INT1

U40A

PCA9555

U40A

PCA9555

10NC47010NC470

L45

BLM21A102S

L45

BLM21A102S

R427

6.8K

R427

6.8K

Q45BC807-25Q45BC807-25

Q43BC807-25Q43BC807-25

Q38BC807-25Q38BC807-25

C479100NFC479100NF

R4402.2KR4402.2K

X5X5

R4212.2KR4212.2K

C472100NFC472100NF

Q39BC807-25Q39BC807-25

R4182.2KR4182.2K

C476100NFC476100NF

R419

6.8K

R419

6.8K

R438

6.8K

R438

6.8K

10NC47510NC475

Q44BC807-25Q44BC807-25

Q40BC807-25Q40BC807-25

L43

BLM21A102S

L43

BLM21A102S

C371220UF-10VC371220UF-10V

C481100NFC481100NF

R3

10K

R3

10K

R4432.2KR4432.2K

R432

6.8K

R432

6.8K

L41

BLM21A102S

L41

BLM21A102S

L40

BLM21A102S

L40

BLM21A102S

R4262.2KR4262.2K

R4244.7KR4244.7K

C480100NFC480100NF

L44

BLM21A102S

L44

BLM21A102S

R422

6.8K

R422

6.8K

R2

10K

R2

10K

C474100NFC474100NF

L49

BLM21A102S

L49

BLM21A102S

C477100NFC477100NF



Oscillator Circuits, PCB 1, sheet 5(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

STD OSC ON/OFF

OVEN OSC ON/OFF

RUBIDIUM ON/OFF

PLL LOCK

LOAD PLL

PLL LOCKRB LOCK

AN

AN

BN

LOAD OVEN

LOAD OVENLOAD PLL

OVEN OSC ON/OFFRUBIDIUM ON/OFF

STD OSC ON/OFF

100MHz

100MHz

-5.2L

RB LOCK

100MHz

+3.3U49

+3.3U49

S/R_ON/OFF

S/R_ON/OFF

BN

10MHZ_RUBIDIUM1

RB LOCK1 RESETHER

LOAD TRGLVL A 1LOAD TRGLVL B

+3.3VD 1,2,5,7,8

+3.3V_U4 1

+12VO

-2.1V

+3.3V_PLL+3.3V_U4

+3.3V_U4

+12VO

+3.3V_PLL

+3.3VD

-5.2VA

+3.3VD

-5.2VA

-2.1V

-2.1V -2.1V

-2.1V

+5VD+3.3VD

-5.2VA

+3.3VA +3.3VA

+3.3VA

-5.2VA

-12VA

-12VA

-12VA

-2.1V

+3.3VD

+3.3V_U4

+3.3VA +3.3VA

-2.1V

-12VA-5.2VA

+3.3VA

+5VD+3.3VD

STD OSC TRIM2

EXT REF8

SPICLK1,2SPIDATA1,2

AN3A3

PRESC ON 5PRESC TEST 5OPTION 5RESGPIBN 8

EXTREFON 8

OPCLK 5

C5

+12VU7

B3

+12VA1,4,5,7

+5VA1,4,5

-12VA1,4,7,8

-5.2VA5,7

+3.3VA7,8+3.3VD1,2,5,7,8

BURST5

BN3

+5VD1,2,5,7,8

EXTCTRL8

S T D OSC.

OVEN OSC.

PHAS E L OCK L OOP

R28347KR28347K

BAV99

D25

BAV99

D25

L13

BLM21A102S

L13

BLM21A102S

R306100R306100

R275

10K

R275

10K

BAV99

D26

BAV99

D26

100K

R289

100K

R289

100KR589100KR589

Q23BFS17

Q23BFS17

10NC205

10NC205

R607

100

R607

100

R339150R339150

10NC17310NC173

R31068R31068

2

31

+

-

U8A

LM358

+

-

U8A

LM358

10NC21110NC211

R309

47

R309

47

R328

120

R328

120

2 4

U47A

LVC1G04

U47A

LVC1G04

R301

NOT USED

R301

NOT USED

R323100

R323100

R31222R31222

C204100NF

C204100NF

R591

150

R591

150

R624

2.2K

R624

2.2K

R271220R271220

VC

C5

GN

D3

U49BNOT USED 1G04U49BNOT USED 1G04

R326100

R326100

10NC21410NC214

L8

BLM21A102S

L8

BLM21A102S

X25X25

R316100

R316100

L6

BLM21A102S

L6

BLM21A102S

C193100NFC193100NF

C17822PFC17822PF

R292

4.7K

R292

4.7K

R307100R307100

R34468R34468

X52X52

C201100NF

C201100NF

R342820R342820

Q20BFS17Q20BFS17

10NC17410NC174

R350680R350680

C170100PC170100P

L58

NOT USED

L58

NOT USEDR351

10

R351

10

10NC494

10NC494

R320

47

R320

47

BAV99

D29

BAV99

D29

6

57

+

-

U8B

LM358

+

-

U8B

LM358

C210100NFC210100NF

R9

NOT USED

R9

NOT USED

R606

100

R606

100

L5

BLM21A102S

L5

BLM21A102S

R33239KR33239K

R2782.2KR2782.2K

C221100NF

C221100NF

C219100NF

C219100NF

R8

Not Used

R8

Not Used

2 4

U49A

NOT USED 1G04

U49A

NOT USED 1G04

CP2

RSET/FLD1

RFINB5

RFINA6

REFIN8

CLK11

DATA12

LE13

MUXOUT14

CE10

U9A

ADF4001

U9A

ADF4001

R3292.2K

R3292.2K

R32547R32547

R315

47

R315

47

1M

R274

1M

R274

R569

150

R569

150

BAV99

D28

BAV99

D28

10NC19010NC190

10NC22410NC224

R623470R623470

L7

BLM21A102S

L7

BLM21A102S

R317100R317100

R590150R590150

PLLLOCK8

RBLOCK9

10MOVEN7

10MSTD5

10MRB6

EXTREF3

100M185

10MPLL11

OVENCTRL203

RBCTRL204

STDCTRL205

S/R_CTRL202

EXTREFCTRL206

A17

AN18

B20

BN21

SR30

SRN31

C22

D16

E15

CTRL048

CTRL149

CTRL2100

CTRL3181

CTRL4188

CTRL5189

CTRL6193

CTRL7199

CTRL8200

CTRL9201

U075

U177

U280

U381

U44

A596

COUNTER CIRCUIT

U11B

SPARTANIIE

COUNTER CIRCUIT

U11B

SPARTANIIE

R335

47

R335

47

C487

22pF

C487

22pF

L57

BLM21A102S

L57

BLM21A102S

C192100uF-6.3VC192100uF-6.3V

R34122R34122

L52

BLM21A102S

L52

BLM21A102S

R336Not Used

R336Not Used

C5100NFC5100NF

1112

13 &ALVC00

U4D

&ALVC00

U4D

C215100NFC215100NF

Q17BC807-25Q17BC807-25

C17922PFC179

22PF

L11

BLM41P800S

L11

BLM41P800S

CV In1

CV Out2

+12V3

Out4

GND5

B1

10 MHZ / CO-08

B1

10 MHZ / CO-08

V+

7

V-

4

U6BOPA277U6BOPA277

R34722R34722

R282

47

R282

47

VC

C5

GN

D3

U47BLVC1G04

U47BLVC1G04

R2723.3KR2723.3K

C2136.8UF-16V

C2136.8UF-16V

10NC22610NC226

R338100

R338100

10NC22510NC225

L10

BLM21A102S

L10

BLM21A102S

R290

4.7K

R290

4.7K

C1721nC1721n

R608

100

R608

100

C1691NC1691N

C187

47P

C187

47P

R31168R31168

R333270R333270

10NC206

10NC206

Q24

BSR12

Q24

BSR12

R348100R348100

R291

4.7K

R291

4.7K

R30347KR30347K

L12

BLM21A102S

L12

BLM21A102S

C18668PC18668P

10NC18110NC181

10N

C203

10N

C203

C22210PFC22210PF

2324 18

17

&U12E

10E104

&U12E

10E104

C1681N

C1681N

R269

47

R269

47

R340270R340270

Q19BFS17

Q19BFS17

L9

BLM21A102S

L9

BLM21A102S

R588

NOT USED

R588

NOT USED

Q25

BSR12

Q25

BSR12

Q22BFS17Q22BFS17

10NC20710NC207

C176100PC176

100P

C195100NFC195100NF

R29310KR29310K

R32239KR32239K

VRef1

RFb2

SRI6

CLK7

LD5

IOut3

U5A

LTC8043

U5A

LTC8043

R270

10K

R270

10K

R28747R28747

R31847R31847

C217100NF

C217100NFV

DD

8

GN

D4

U5BLTC8043U5BLTC8043

2728 13

12

&U12C

10E104

&U12C

10E104

L53

BLM21A102S

L53

BLM21A102S

VE

E1

VC

C0

16

F219

VC

C1

1

F120

VC

C0

21 U12F

10E104

U12F

10E104

C16

22PF

C16

22PF

R33110KR33110K

23 10

9

&U12B

10E104

&U12B

10E104

2526 15

14

&U12D

10E104

&U12D

10E104

89

10 &ALVC00

U4C

&ALVC00

U4C

X27X27

45 8

7

&U12A

10E104

&U12A

10E104

C1832.2UF-6.3VC1832.2UF-6.3V

BAV99

D27

BAV99

D27

C171100PC171100P

L14

BLM21A102S

L14

BLM21A102S

R32110KR32110K

C18033PFC18033PF

VC

C5

GN

D3

U48BLVC1G04U48BLVC1G04

100KR288

100KR288

D23SMV1255-073

D23SMV1255-073

1M

R280

1M

R280

R313

47

R313

47

3

26

18

-

+

U6A

OPA277

-

+

U6A

OPA277

R28410KR28410K

Q27BC847B

Q27BC847B

D24

SMV1255-073

D24

SMV1255-073

R295

100

R295

100

V+

7

V-

4

U7BOPA277U7BOPA277

R304NOT USEDR304NOT USED

C18233PFC18233PF

10NC18910NC189

C495NOT USED

C495NOT USED

R281

1K

R281

1K

2 4

U48A

LVC1G04

U48A

LVC1G04

C18868PC18868P

L3

100N

L3

100N

C49822PFC49822PF

B2

10MHZ

B2

10MHZ

C185

15pF

C185

15pF

GN

D7

VC

C14

U4EALVC00

U4EALVC00

Q21BFS17

Q21BFS17

C175

100NF

C175

100NF

R334100

R334100

R568

47

R568

47

C21810PFC21810PF

10NC19110NC191

R324100R324100

R286

470

R286

470

R330Not Used

R330Not Used

10NC21610NC216

10NC22310NC223

R346680R346680

C17100PC17100P

R34368R34368

R29447KR29447K

R7

NOT USED

R7

NOT USEDR296

100

R296

100

R305100R305100

R327

47

R327

47

C194100NFC194100NF

Q18BFS17Q18BFS17

R2774.7KR2774.7K

R349100

R349100

R308100R308100

R27647KR27647K

C17733PFC17733PF

C202100NF

C202100NF

C147PC1

47P

R28510KR28510K

31

2 &ALVC00

U4A

&ALVC00

U4A

3

26

1 8

-

+

U7A

OPA277

-

+

U7A

OPA277

10N

C212

10N

C212

C208100NFC208100NF

10NC20910NC209

R3524.7K

R3524.7K

R337100

R337100

Q26

BC847B

Q26

BC847B

64

5 &ALVC00

U4B

&ALVC00

U4B

R609

100

R609

100

CP

GN

D3

AG

ND

4

AV

DD

7

DG

ND

9

DV

DD

15

VP

16

U9BADF4001U9BADF4001

R279

47

R279

47

C184100PC184100P

R319

47

R319

47

V+

8

V-

4

U8CLM358U8CLM358

J2ANOT USED MINICOAX-3J2ANOT USED MINICOAX-3

R314

47

R314

47

C22010PFC22010PF



Supply Voltages, PCB 1, sheet 6(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

+5VA

+5VA

+15VU 1

POWERON

+5VD 1,2,5,6,8

+3.3VD 1,2,5,6,8

+12VA 1,4,5,6

-12VA 1,4,6,8

+5VA1,4,5,6

+5VU

-15VU

+15VU

-12VA

-5.2VI

+5VA

+5VU

+5VU

+5VU

+5VU

+5VU

+5VU

+5VU

-15VU

-15VU

+15VU

+15VU

+15VU

+5VU

+15VU

+15VU-12VA

-5.2VI

+5VA

-12VA

OFFCTRL2

ONCTRL2

FANCTRL2

-5.2VA 5,6

-12VA 1,4,6,8

+5VD 1,2,5,6,8

+3.3VA 6,8

+3.3VD 1,2,5,6,8

+5VU 2

POWERON 2

+15VU 1

+15VD 5,8

+12VA 1,4,5,6

+12VU 6

STBYLED 2

+5VA 1,4,5,6

-5.2VI 5

FROM AC/ DCPOWERS UPPL Y

- 15V

+5V

+15V

FANCONNECT OR

ON

OFF

R503

2.2K

R503

2.2K

R601

10

R601

10

C389100NFC389100NF

R474

10

R474

10

R616820R616820

R4823.3KR4823.3K

R599

10

R599

10

R476

10

R476

10

6

57

+

-U30B

LM358+

-U30B

LM358

R4592.2KR4592.2K

R4501K

R4501K

R448680R448680

C4064.7UF-35VC4064.7UF-35V

R5001KR5001K

L28

4.3UH

L28

4.3UH

C393100uF-6.3VC393100uF-6.3V

X63X63


R471

10

R471

10

R6176.8KR6176.8K

R447

2.2K

R447

2.2K

C488

22UF-35V

C488

22UF-35V

X12X12

C395100NFC395100NF

10NC39610NC396

R470

10

R470

10

R596

10

R596

10

R595

10

R595

10

R577

100

R577

100

R580

3.3K

R580

3.3K

R626120R626120

R49610KR49610K

X39X39

R581

47

R581

47

V+

8

V-

4

U30CLM358U30CLM358

X44X44

IN3

OUT5

ADJ1

GND4

ON/OFF2

IN/TAB6

REG

U123

LM2991S

REG

U123

LM2991S

X11X11

R570

100

R570

100

Q51BCP51Q51BCP51

X26X26

R458

10

R458

10R593

1K

R593

1K

R592

1K

R592

1K

R603

10

R603

10

R571

100

R571

100

R58210KR58210K

R44910KR44910K

R504

10

R504

10

R468

10

R468

10

IN1

OUT3

GND2

GND4

REG

U129

LM2940CS-12

REG

U129

LM2940CS-12

C38622UF-35VC38622UF-35V

C489100NFC489100NF

R597

10

R597

10

PVIN9

PVIN216

SVIN1

FB4

PGND12

PGND213

SGND8

S/M6

SHDN/SS7

PGOOD2

RT5

ITH3

SW10

SW211

SW314

SW415

REG

U128

LTC3412

REG

U128

LTC3412

IN8

OUT1

SHDN3

GND4

SENSE2

ERROR5

VTAP6

FB7

REG

U126

LP2951CM

REG

U126

LP2951CM

IN3

OUT5

ADJ1

GND4

ON/OFF2

IN/TAB6

REG

U124

LM2991S

REG

U124

LM2991S

R598

10

R598

10

V+

8

V-

4

U35CLM358U35CLM358

X51X51

Q57BCP54Q57BCP54

X10X10

C4001NC4001N

C398100uF-6.3VC398100uF-6.3V

C493100NFC493100NF

R451330R451330

Q58BC847BQ58BC847B

R456

10

R456

10

R622120R622120

X43X43

6

57

+

-

U35B

LM358

+

-

U35B

LM358

R461

10

R461

10

R473

10

R473

10

X22X22

D12

CLK11

S1

0R

13

Q9

Q8

U29B

LVC74A

U29B

LVC74A

CTL1

FLG2

GATE4

GND3

IN7

IN5

OUT8

OUT6

U127

MIC2505

U127

MIC2505

X38X38

R4861KR4861K

C402100NFC402100NF

Q46BC847BQ46BC847B

C409220UF-10VC409220UF-10V

R4833.3KR4833.3K

X48X48

R5791.5KR5791.5K

R602

10

R602

10

X50X50

C394100uF-6.3VC394100uF-6.3V

C401100PC401100P

X42X42

C4084.7UF-35VC4084.7UF-35V

Q49

BCP51

Q49

BCP51

X15X15

R620120R620120

R4521KR4521K

R4603.3KR4603.3KR467

10

R467

10

C38722UF-35VC38722UF-35V

R627120R627120

VC

C1

4

GN

D7


12

J19F095J19F095

C38822UF-35VC38822UF-35V

R573

100

R573

100

R493

2.2K

R493

2.2K

X47X47

123456

J17

640445-6

J17

640445-6

R479220R479220

R487470KR487470K

R495

33K

R495

33K

X41X41

2

31

+

-

U35A

LM358

+

-

U35A

LM358

C49022UF-35VC49022UF-35V

R4971KR4971K

330K

R489

330K

R489

C397100UF-6.3V

C397100UF-6.3V

1MR4941MR494

R578

100

R578

100

C4034.7UF-35VC4034.7UF-35V

C197100NFC197100NF

R605

10

R605

10

R604

10

R604

10

R466

1K

R466

1K

10nC41210nC412

C385

22UF-35V

C385

22UF-35V

12

J28

176125-2

J28

176125-2

R600

10

R600

10

R625120R625120

R498

10

R498

10

X62X62

R502

10

R502

10

X24X24

Q50BC847BQ50BC847B

C404220UF-35VC404220UF-35V

R4912.2KR4912.2K

R465

10

R465

10

Q47BC847BQ47BC847B R475

10

R475

10

R454

10

R454

10

R472

47

R472

47

R499

10

R499

10

R576

100

R576

100

X23X23

10nC2610nC26

X46X46

X16X16

2

31

+

-U30A

LM358+

-U30A

LM358

C399220UF-10VC399220UF-10V

X17X17

R48815KR48815K

R469

10

R469

10

R4531KR4531K

X9X9

R492

10K

R492

10K

1MR4781MR478

X14X14

R584

47

R584

47

R457

10

R457

10R463

10

R463

10

D2

CLK3

S4

R1

Q5

Q6

U29A

LVC74A

U29A

LVC74A

Q56BC807-25Q56BC807-25

C491100NFC491100NF

R619

1K

R619

1K

R477

10

R477

10

R621120R621120

10N

C405

10N

C405

C407220UF-10VC407220UF-10V

R446

470

R446

470

R462

10

R462

10

IN1

OUT3

GND2

GND4

REG

U130

LM2940CS-12

REG

U130

LM2940CS-12

C411100NF

C411100NF

R455

10

R455

10

X8X8

R61810KR61810K

C49222UF-35VC49222UF-35V

X49X49

R501

10

R501

10

X21X21

X40X40

R572

100

R572

100

Q48BCP51Q48BCP51

X45X45

R490150KR490150K

R480470R480470

R575

100

R575

100

R464

10

R464

10

R594

10

R594

10



Rear Panel, Interfaces and I/O, PCB 1, sheet 7/7


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

G0G1G2

G6G7

G0G1G2

G5G6G7

G3

G5G4

G3G4

G[0..7]

D1

D0

D5

D6

D10

D8

D13

D3

D12

D[0..15]

D7

D2

D5

D7

D14

D11

D6

D4

D0

D1

D2

D15

D4

D9

D3

A[0..4]

A4

A0

A2

A0A1

A3

40_MHz

+3.3VIF

+5VPO

+15VRO

-12VRI

+3.3VRI

+3.3VEC

+3.3VIF

+5VPO

+5VGP

+3.3VEC

+3.3VIF

+15VRO

-12VRI

+3.3VRI +3.3VRI

+3.3VRI

+5VGP +3.3VIF

+5VGP

+3.3VIF

+3.3VRI

+5VPO

+5VPO

+3.3VIF

+5VPOCSUSBN2

RESGPIBN6

CSGPIBN2

RDN2

WRN2

DIRGPIB2

D[0..15]2

INTREF4

A[0..4]2

EXTREFON6

+15VD5,7

-12VA1,4,6,7

+3.3VA6,7

+3.3VD1,2,5,6,7

+5VD1,2,5,6,7

GET 2

IRQGPIB 2

IRQUSB 2

EXTCTRL 6

EXT REF 6

I NT ERNALREFERENCEOUT ( r ear panel )

EXT ERNALARMI NGI N ( r ear panel )

USBCONNECT OR

EXT ERNALREFERENCEI N ( r ear panel )

GPI BCONNECT OR

GPI BCONNECT OR

R531

100

R531

100

B4

6MHZ

B4

6MHZ

R549

1K

R549

1K

L384.7UHL384.7UH

R5513.3KR5513.3K

R547470R547470

C469100NFC469100NF

C41622PFC41622PF

C44833PFC44833PF

VC

C14

GN

D7

U41EHCT126U41EHCT126

+IN1

-IN2

SHDN3

LE4

VCC8

QN7

Q6

GND5

U131

MAX961

U131

MAX961

R555

470

R555

470

C11NOT USEDC11NOT USED

10nC2810nC28

R5322.2KR5322.2K

C429

100NF

C429

100NF

C410100NFC410100NF

R53710R53710

C43422UF-35VC43422UF-35V

C18NOT USED

C18NOT USED

C452100NFC452100NF

R5064.7KR5064.7K

C41522PFC41522PF

BAV99D46BAV99D46

OE22

DIR2

A03

A14

A25

A36

A47

A58

A69

A710

B021

B120

B219

B318

B417

B516

B615

B714

U38A

LVC4245A

U38A

LVC4245A

AD038

D135

D234

D333

D432

D531

D630

D729

D828

D927

D1024

D1123

D1222

D1321

D1420

D1519

A039

ALE42

CS43

RD40

WR41

INT15

SUSPEND9

WAKEUP8

DREG11

DACK12

EOT10

BUS_CONF118

BUS_CONF017

GL7

X1

48

X2

47

VBUS6

D-4

D+5

RESET44

CLKOUT45

USB

U34A

ISP1181B

USB

U34A

ISP1181B

10MHZ

B6

10MHZ

B6

VC

C1

VC

C_

3,3

37

TE

ST

113

TE

ST

214

TEST316

GN

D2

5

GN

D3

6

GN

D4

6

RE

GG

ND

2

VR

EG

_3,3

3

VR

EF

26

U34BISP1181BU34BISP1181B

C466100NFC466100NF

X64X64

VC

C14

GN

D7


R5254.7KR5254.7K

R583

47

R583

47

C4NOT USEDC4NOT USED

C467100NFC467100NF

R509

470

R509

470

C4352.2UF-6.3VC4352.2UF-6.3V

D12

CLK11

S1

0R

13

Q9

Q8

U32B

LVC74A

U32B

LVC74A

BAT54S

D53

BAT54S

D53

VC

CA

1

VC

CB

23

VC

CB

24

GN

D1

1

GN

D1

2

GN

D1

3

U38BLVC4245AU38BLVC4245A

C44515PFC44515PF

C43322PFC43322PF

R53522R53522

R5582.2KR5582.2K

X18X18

REN17

IFC9

NDAC8

NRFD7

DAV6

EOI5

ATN11

SRQ10

J25B

GPIB-57LE

J25B

GPIB-57LE

C450

100NF

C450

100NF

DRQ32

RDY138

X0

95

X1

96

A015

A116

A217

A318

A419

D039

D142

D243

D344

D446

D547

D649

D750

D811

D910

D109

D117

D126

D135

D143

D152

CS55

WR64

RD63

RESET67

INTR34

TRIG23

IO192

IO291

IO389

IO488

IO580

IO677

IO774

IO871

SRQ76

ATN73

EOI85

DAV84

NRFD82

NDAC81

IFC79

REN70

ABUS14

BBUS62

DACK33

BURST_RDN31

FIFO_RDY30

SWAP29

REM28

ABUS_OEN20

BBUS_OEN1

PAGED26

CPUACC22

MODE53

TADCS21

LADCS66

DACS51

KEYRST100

KEYCLK98

KEYDQ99

GPIBCNTRL

U37A

TNT4882

GPIBCNTRL

U37A

TNT4882

Q55

BFS17

Q55

BFS17

1112

13 &ALVC00

U33D

&ALVC00

U33D

R56210KR56210K

C42222UF-35VC42222UF-35V

1M

R543

1M

R543

D50

BYD17G

D50

BYD17G

DIO11

DIO22

DIO33

DIO44

DIO513

DIO614

DIO715

DIO816

J25A

GPIB-57LE

J25A

GPIB-57LE

L29

BLM21A102S

L29

BLM21A102S

R5521KR5521K

L36

BLM21A102S

L36

BLM21A102S

R5141.5KR5141.5K

L631uHL631uH

V+

7

V-

4

U31BLMH6624U31BLMH6624

VBus1

D-2

D+3

GND4

J22A

USB TYPE B

J22A

USB TYPE B

R538120R538120

C449100NFC449100NF


VD

D1

2V

DD

24

VD

D3

6V

DD

40

VD

D5

8

VD

D6

9

VD

D6

0

VD

D8

7V

DD

94

GN

D4

GN

D8

GN

D1

3

GN

D2

7

GN

D2

5

GN

D3

5G

ND

37

GN

D4

1G

ND

45

GN

D4

8G

ND

54

GN

D5

6G

ND

57

GN

D5

9G

ND

61

GN

D6

5G

ND

68

GN

D7

2G

ND

75

GN

D7

8G

ND

83

GN

D8

6G

ND

90

GN

D9

3G

ND

97

NC52

U37BTNT4882

NC52

U37BTNT4882

GN

D1

8

GN

D1

9

GN

D2

0

GN

D2

1

GN

D2

2

GN

D2

3

GN

D2

4

SH

IELD

12

J25CGPIB-57LEJ25CGPIB-57LE

R55715R55715

R53422R53422

C41710pC41710p

L30

BLM21A102S

L30

BLM21A102S

9 8

10

U41C

HCT126

U41C

HCT126

C440

100NF

C440

100NF

C44733PFC44733PF

31

2 &ALVC00

U33A

&ALVC00

U33A

C443

2.2PF

C443

2.2PF

5 6

4

U41B

HCT126

U41B

HCT126

R5532.2KR5532.2K

C44615PFC44615PF

C463100NFC463100NF

R512

470

R512

470

R51615KR51615K

D51

BYD17G

D51

BYD17G

C465100NFC465100NF

R56310KR56310K

C414

10PF

C414

10PF

C436100NFC436100NF

L31

4.7UH

L31

4.7UH

GN

D7

VC

C14

U33EALVC00U33EALVC00

L374.7UHL374.7UH

L34

BLM21A102S

L34

BLM21A102S

D2

CLK3

S4

R1

Q5

Q6

U32A

LVC74A

U32A

LVC74A

R523

1K

R523

1K

C441

10PF

C441

10PF

R5293.3KR5293.3K

R5461.5KR5461.5K

X20X20

X19X19

C468100NFC468100NF

J21

BNC-COAX

J21

BNC-COAX

X61X61

C462100NFC462100NF

R16

47

R16

47

R55947R55947

R5614.7KR5614.7K

2

36

+

-

U31A

LMH6624

+

-

U31A

LMH6624

64

5 &ALVC00

U33B

&ALVC00

U33B

Q54BFG16AQ54BFG16A

R526

100

R526

100

J26

BNC-COAX

J26

BNC-COAX

Q53BFG16AQ53BFG16A

R544100R544100

L32

BLM21A102S

L32

BLM21A102S

R536

47

R536

47

C437100NFC437100NF

C42882PC42882P

C430100NFC430100NF

BAV99

D48

BAV99

D48

C43233pFC43233pF

R533

100

R533

100

C424

1N

C424

1NR5304.7KR5304.7K

R5181KR5181K

C421100NFC421100NF

12 11

13

U41D

HCT126

U41D

HCT126

C46422UF-35VC46422UF-35V

2 3

1

U41A

HCT126

U41A

HCT126

100KR560100KR560

C451100PC451100P

R5451.5KR5451.5K

C42733PFC42733PF

C438

100NF

C438

100NF

89

10 &ALVC00

U33C

&ALVC00

U33C

R527

47

R527

47

J23

BNC-COAX

J23

BNC-COAX

L33

BLM21A102S

L33

BLM21A102S

100KR548100KR548

C439

100NF

C439

100NF

C442

3-10PF

C442

3-10PF

C453100NFC453100NF

R510

470

R510

470

C444

100NF

C444

100NF

C431220UF-10VC431220UF-10V

L35

BLM21A102S

L35

BLM21A102S

R554

47

R554

47

BAV99D52BAV99D52

C10100NFC10100NF

40MHZ

B5

40MHZ

B5

Display & Keyboard, PCB 2, Component Layout


Display & Keyboard, PCB 2


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

V0

V0

V1

V4

V0

V2

V3

V3

V2

V1

V4

+3.3V

+5V

+3.3V

+3.3V

+3.3V

+3.3V

+5V

+3.3V

Title

Size Document Number Rev

Modify Date: Sheet o f

Project

01

Display and Keyboard Board

Pendulum Instruments AB

A2

1 1

4031 100 65860May 28, 2004

CNT-90/91

Web Site = www.pendulum.se

15.0 - 17.6 V

STDBY GATE TRIGATRIGB

TO

BASIC

BOARD

L1

10uH

S24

USER OPT

C11100nF

R18

10

H13.2 PLATED SQUARE PAD

S20

INPUT A

C7

100nF

C15100nF

S3

UP

C1622uF-6.3V

R1

47

U1CLM358

V+

8

V-

4

S18

F7

+

-

U2A

LM358

2

31

C533pF

S10

C

S14

F3

D3EL414GD

J1FPC 20

NC

1N

C2

NC

3N

C4

NC

5N

C6

FR

7LP

8D

OF

F9

EIO

10

VD

D11

VS

S12

V4

13

V1

14

V0

15

NC

16

NC

17

NC

18

NC

19

NC

20

S25

HOLD/RUN

L2

BLM21A102S

U3BPCA9555V

DD

24

VS

S12

S21

INPUT B

C9100nF

H23.5 PLATED

R5

10

R13

10

C13100nF

S8

RIGHT

C222.2uF-35V

S19

StandBy

C8100nF

C1100nF

U2CLM358

V+

8

V-

4

S1

MEAS FUNC

R334.7K

R174.7K

S6

LEFT

C202.2uF-35V

S15

F4

D4EL414GD

TP3

R20

47

C1822uF-6.3V

PROBE GND1

U3A

PCA9555

A0

21

A1

2A

23

SC

L22

SD

A23

I/O

0.0

4I/O

0.1

5I/O

0.2

6I/O

0.3

7I/O

0.4

8I/O

0.5

9I/O

0.6

10

I/O

0.7

11

I/O

1.0

13

I/O

1.1

14

I/O

1.2

15

I/O

1.3

16

I/O

1.4

17

I/O

1.5

18

I/O

1.6

19

I/O

1.7

20

INT

1

R35

Not used

S26

RESTART

1MR2

H33.5 PLATED

S22

SETTINGS

470K

R4

320x97 DOTSE1TM32097AGFG

+

-

U1B

LM358

6

57

C6100nF

R10

10

C2522uF-6.3V

820KR8

S13

F2

TP2

C19

100nF

C10100nF

PROBE GND2

S2

AUTO SET

C44.7uF-35V

R194.7K

S11

DOWN

REG

U4

TPS61045

L1

VIN2

CTRL5

GND6

SW8

DO3

FB4

PGND7

S16

F5

D5EL414GD

R14

10

H43.5 PLATED

R34.7K

S4

VALUE

R6

Not used

S23

MATH/LIM

+

-

U1A

LM358

2

31

C14100nF

C34.7uF-35V

R16

10

TP4J2FPC 20

NC

1

V0

2

V2

3

V3

4

VS

S5

MD

6

FR

7

LP

8

DO

FF

B9

XC

K10

DI7

11

DI6

12

DI5

13

DI4

14

DI3

15

DI2

16

DI1

17

DI0

18

VD

D19

NC

20

S12

F1

+

-

U2B

LM358

6

57

C12100nF

100KR9

S7

ENTER

C21

100nF

D2EL414ID

C17100nF

S9

STAT PLOT

S17

F6

R344.7K

TP5

S5

OK EXIT

R74.7K

C232.2uF-35V

C2422uF-6.3V

10BQ030

D1

J3

2x10 SMD

1234567891011121314151617181920

R11

10

R1533K

TP1

This page is intentionally left blank


Version B








Main Board, PCB 1, Component Layout, Bottom Side


Main Board, PCB 1, Component Layout, Top Side


Main Schematic


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

DOUT

A0A1A2A3A4A5A6A7A8A9A10A11

A13A14

A0A1A2A3A3A4A5A6A7A8

A10A11

A13A14

D24D25D26D27D28D29D30D31

D IN

RB LOCK

D[0..31]

A[0..23]

D3D20

D0

D6

D15

D11

D18

D22

D4D19

D7

D9

D12

D23

D1

D13

D16

D5

D2

D8

D14

D17

D10

D21

A9

DQM2DQM3

DQM[0..3]

DQM0DQM1

A12 A12

+5VTR

+5VA

+3.3VD

+12VA

-12VA

+5VTR

+3.3VMEM2

+3.3VMEM1

+5VA

+12VA

-12VA

+5VTR

+3.3VD

+3.3VMEM1

+3.3VMEM2

+3.3VD

1

RUB I DI UMOS C.

U15BK4S561632D

VD

D1

VD

D14

VD

D27

VD

DQ

3

VD

DQ

9

VD

DQ

43

VD

DQ

49

VS

S2

8

VS

S4

1

VS

S5

4

VS

SQ

6

VS

SQ

12

VS

SQ

46

VS

SQ

52

R6

100

R14

10K

C561100uF-6.3V

L67

BLM41P800S

R66922

J27ANOT USED MINICOAX-3

C200Not Used

C196Not Used

C381100NF

-

+

U26A

OPA277

3

26

1 8

L27

BLM21A102S

C383100NF

C542100n

C482NOT USED

R302Not Used

-

+

U28A

OPA277

3

26

1 8

C310100NF

C5601n

R299Not Used

C546100n

R297

Not Used

C562100uF-6.3V

L4

Not_used

C382100NF

C485NOT USED

C374100NF

-

+

U24A

OPA277

3

26

1 8

C375

1nF

DAC

U46C

MAX5156

UPO11

DOut10

PDL12

CL5

CS6

DIn7

SClk8

C5431n

C315100NF

C547100n

C311100NF

U16A

K4S561632D

A023

A124

A225

A326

A429

A530

A631

A732

A833

A934

A1022

A1135

A1236

I/O02

I/O14

I/O25

I/O37

I/O48

I/O510

I/O611

I/O713

I/O842

I/O944

I/O1045

I/O1147

I/O1248

I/O1350

I/O1451

I/O1553

RAS18

WE16

CS19

CAS17

LDQM15

BA020

BA121

UDQM39

CKE37

CLK38

DACU46A

MAX5156

RefA4

FBA3

OutA2

U122

LT1009CD46

5

8

H1

3.5 PLATED

10MHZ_RUBIDIUM

RB LOCK

DIN

DOUT

+15VU

A[0..23]

D[0..31]

CS

WE

CLK

CK

E

LOAD TRGLVL A

LOAD TRGLVL B

SPICLK

SPIDATA

VREFTRG_LVL_A

TRG_LVL_B

GATEOUT

+5VPO

+3.3V_U4

+5VD

+5VA

POWERON

+3.3VD

+12VA

-12VA

CA

S

RA

S

DQ

M[0

..3

]

U26BOPA277

V+

7

V-

4

C314100NF

R11

10K

R566

100

C563100uF-6.3V

C377

15UF-6.3V

R4451.5K

C540100n

C378

1nF

R298Not Used

C5441n

U16BK4S561632DV

DD

1

VD

D1

4

VD

D2

7

VD

DQ

3

VD

DQ

9

VD

DQ

43

VD

DQ

49

VS

S2

8

VS

S4

1

VS

S5

4

VS

SQ

6

VS

SQ

12

VS

SQ

46

VS

SQ

52

J11

2X10 SMD

1234567891011121314151617181920

R300Not Used

C548100n

C313100NF

X6

C199

Not Used

R13

10K

X13

U15A

K4S561632D

A023

A124

A225

A326

A429

A530

A631

A732

A833

A934

A1022

A1135

A1236

I/O02

I/O14

I/O25

I/O37

I/O48

I/O510

I/O611

I/O713

I/O842

I/O944

I/O1045

I/O1147

I/O1248

I/O1350

I/O1451

I/O1553

RAS18

WE16

CS19

CAS17

LDQM15

BA020

BA121

UDQM39

CKE37

CLK38

X7

L66

BLM41P800S

C316100NF

DACU46B

MAX5156

RefB13

FBB14

OutB15 U46D

MAX5156VD

D1

6

DG

ND

9

AG

ND

1

L56

BLM41P800S

U28BOPA277

V+

7

V-

4

C564100uF-6.3V

R12

10K

C312100NF

C37622UF-35V

U24BOPA277

V+

7

V-

4

C380100NF

C541100n

C198Not Used

R567

100

R10

2.2K

C545100NF

C5491n



CPU, Memories and Parts of the Counter Circuit, PCB 1, sheet 1(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

TCK

CSF

AF3AF4

DF16DF15DF14DF13DF12

DF9DF8DF7DF6DF5DF4DF3DF2DF1DF0

DF11DF10

SPICLKSPIDATA

SPIOVENSPIPLL

LOAD TRGLVL ALOAD TRGLVL B

EMPTY

TDI

TMS

TDO

TRST

SPICLK

SPIDATASPIOVENSPIPLLLOAD TRGLVL ALOAD TRGLVL B

DICCLKPROGN

DONE

PROGN

CCLK

INITN

D I

LCDCLK

LCDD3

GATETRBTRAINTKEYB

CSGPIBN

CSFPGA

DONEINITN

CSUSB

A[0..23]

DF24

DF17

DF27

DF21

DF31

DF25

DF28

DF22

DF19

DF29

DF23

DF26

DF20

DF30

DF18

DF31DF30DF29DF28DF27DF26DF25DF24




DF[0..31]

DQ

M0

DQ

M3

DQ

M2

DQ

M1

CSGPIBN

CSUSB

OEP

OEP

D4

D12

D9

D2

D8

D0

D11

D7

D1

D13

D3

D6

D10

D5A16

A1

A19

A18

A9

A20

A3A2

A3A11

A21

A15

A16

A20

A2

A3

A5

A19

A7

A18

A21

A1

A11

A4

A13

A13

A1

A12

A7

A6

A14

A17

A17 A10

A8

A0

A6

A2

A9

A10A4

A0

A8

A5

A12

A15

A4

A0

A14

DQM0DQM1DQM2DQM3

TMSTCKTDI

TDO

RESN

TR

ST

CSGPIBNCSFCSUSBCSFPGA

AF1

AF4

AF1

AF3

AF2

AF[0..4]

AF0

AF0

AF2

A21 A22 A23A20

RESN

FAN

STDRESFPGA

RESFPGA

RBTX

OFFCTRL

EMPTY

IICSCL

IICSDAIICSCL

LCDFR

LCDD0

LCDD2

LCDRANCONTR

LCDLD

LCDD1

SCL

INTKEYB

CSFPGA

TRA

TRB

GATE

FAN

STD

RBTX

LCDCLK

LCDLD

CONTR

LCDRAN

LCDFR

LCDD0

LCDD1

LCDD2

LCDD3

A22A23

RB LOCKPLL LOCK

RB LOCK

PLL LOCK

D9

D0

D29

D4

D4

D24

D17

D31

D19

D21

D22

D7

D9

D7D6

D20

D18

D25

D11

D30

D29

D25

D8

D28

D14

D19

D23

D24

D30

D17

D16

D23

D13

D27

D12

D5

D26

D6D14

D15

D20

D27 D18

D16

D3

D2

D31

D10

D10

D14

D26D11

D28

D5

D21

D0

D13

D1

D8

D3

D2D1

D15D22

D12

D15

UPRD

SDA

SDA

SCL

IICSDA

OFFCTRL

UPRD

CAS 1RAS 1

DQM[0..3] 1

CS 1CLK 1CKE 1

WE 1

DIN 1

A[0..23] 1D[0..31] 1

SPIDATA 1,6

SPICLK 1,6

LOAD TRGLVL A 1LOAD TRGLVL B

DOUT1

RB LOCK1

+3.3VMEMF

+3.3VCPU

+3.3VDISP

+5VD

+3.3VCPU

+3.3VCPU

+3.3VCPU

+1.8VP

+5VD

+3.3VDISP

+3.3VCPU

+3.3VMEMF

+3.3VFPGA

+3.3VMEMF

+3.3VCPU

+3.3VCPU

+3.3VFPGA

+3.3VCPU

+3.3VCPU

+3.3VCPU

+3.3VCPU

+3.3VCPU

+3.3VCPU

+3.3VCPU

+5VD

+5VD

+3.3VCPU

+1.8VP

+3.3VCPU

+3.3VCPU

+1.8VP

+3.3VD1,5,6,7,8

TRALED4

TRBLED4

GATELED4

STBYLED7

+5VD1,5,6,7,8

SDA 5

SCL 5

SPICLK 1,6

OFFCTRL 7

SPIDATA 1,6

RDN 8

CSGPIBN 8CSUSBN 8

WRFN 8

ONCTRL 7

DF[0..31] 8

SPIOVEN 6SPIPLL 6

IRQUSB8IRQGPIB8

STD OSC TRIM 6

FANCTRL 7

AF[0..4] 8

+3.3VFPGA5

RESGPIBN 8

PLL LOCK6

UPRD 6

J T AGCONNECT OR

DI S P L AYBOARDCONNECT OR

CONNET CT T OUS E J T AG

+1. 8 V FROM PROCES SOR

R651

100

X60

C5781n U17B

AM29LV640MHVC

C43

VIO

29

VS

S52

VS

S33

U55

LTC2905

V18

V21

S16

S27

GND4

RST3

TMR2

TOL5

R35910K

R639

100

X55

10nC568

R2210K

U52CLVC162245A

GN

D4

GN

D10

GN

D15

GN

D21

GN

D28

GN

D34

GN

D39

GN

D45

VC

C7

VC

C3

1

VC

C4

2

VC

C1

8

X66

C518Not_Used

R14.7K

C317100n

J3

F09512

R63010K

R3543.3K

R646

100

10nC572

C303100n

100nC282

R4234.7K

U53B

LVC162245A

2A036

2A135

2A233

2A332

2A430

2A529

2A627

2A726

2B013

2B114

2B216

2B317

2B419

2B520

2B622

2B723

OE225

DIR224

R587

470

R36310K

470pC501

X29

X30

R6354.7K

U13A

LH79524

RESETINJ2

RESETOUTH1

TRSTD2

TMSP4

TCKT3

TDIT1

TEST1T2

TEST2R3

LINREGNE3

TDOP3

USBDNA16

USBPNA15

CLKOUTK1

XT

AL

INC

16

XT

AL

OU

TC

15

X3

2IN

D1

6

X3

2O

UT

D1

5

X68

470pC285

10nC301

100nC304

10nC516

X33

J13

2X10 90DEG SMD

123456789

1011121314151617181920

U25C

HCT126

9 8

10

U53A

LVC162245A

1A047

1A146

1A244

1A343

1A441

1A540

1A638

1A737

1B02

1B13

1B25

1B36

1B48

1B59

1B611

1B712

OE148

DIR11

C35422uF-6.3V

10nC309

C519

Not_Used

U116

MAX6355

GND2

MR3

VCC16

VCC24

RSTIN5

RST1

R647

100

R2110K

10nC571

X1

J12

2X10 SMD

1234567891011121314151617181920

100nC288

&LVC08

U56D

1112

13

R654

100

U54B

LVC162245A

2A036

2A135

2A233

2A332

2A430

2A529

2A627

2A726

2B013

2B114

2B216

2B317

2B419

2B520

2B622

2B723

OE225

DIR224

R63110K

100nC283

R667

100

R638

10

&

LVC08

U56A

31 2

U52A

LVC162245A

1A047

1A146

1A244

1A343

1A441

1A540

1A638

1A737

1B02

1B13

1B25

1B36

1B48

1B59

1B611

1B712

OE148

DIR11

470pC286

R4244.7K

100nC305

C49922uF-6.3V

1M

R358

R36110K

10nC515

U17A

AM29LV640MH

A031

A126

A225

A324

A423

A522

A621

A720

A810

A99

A108

A117

A126

A135

A144

A153

A1654

A1719

A1818

A1911

A2012

A2115

I/O035

I/O137

I/O239

I/O341

I/O444

I/O546

I/O648

I/O750

I/O836

I/O938

I/O1040

I/O1142

I/O1245

I/O1347

I/O1449

I/O1551

OE34

WE13

CE32

RESET14

WP/ACC16

BYTE53

RY/BY17

U25A

HCT126

2 3

1

R42510K

U54A

LVC162245A

1A047

1A146

1A244

1A343

1A441

1A540

1A638

1A737

1B02

1B13

1B25

1B36

1B48

1B59

1B611

1B712

OE148

DIR11

10nC508

COUNTER CIRCUIT

U11C

SpartanIIE-2

DB31180

DB30179

DB29178

DB28176

DB27175

DB26174

DB25173

DB24169

DB23168

DB22167

DB21166

DB20165

DB19164

DB18163

DB17162

DB16161

DB15160

DB14152

DB13151

DB12150

DB11149

DB10148

DB9147

DB8146

DB7145

DB6141

DB5140

DB4139

DB3138

DB2136

DB1135

DB0134

FIFOALERT127

INTERRUPT129

MPCLK182

RD122

WR123

A0121

A1120

A2116

A3115

A4114

RESET133

DIN153

CCLK155

PROGRAM106

DONE104

INIT107

DOUT154

FIFOEMPTY132

CSFPGA181

CSGPIB125

C3327pF

X32

U54CLVC162245A

GN

D4

GN

D10

GN

D15

GN

D21

GN

D28

GN

D34

GN

D39

GN

D45

VC

C7

VC

C3

1

VC

C4

2

VC

C1

8

R6364.7K

10nC570

R653

100

C3622uF-6.3V

X28

R2010K

100nC535

C318100NF

R66510K

R614

100

R655

100

U25D

HCT126

12 11

13

100nC284

C517100n

C5731n

R585

470

C319100NF

U52B

LVC162245A

2A036

2A135

2A233

2A332

2A430

2A529

2A627

2A726

2B013

2B114

2B216

2B317

2B419

2B520

2B622

2B723

OE225

DIR224

&LVC08

U56B

64

5

470pC287

LVC08U56E

GN

D7

VC

C1

4

100nC306

R63210K

R663

10K

X58

R66410K

R36010K

L18

BLM21A102S

R648

100

R66610K

U13DLH79524

VD

DN

10

VD

DN

9V

DD

N8

VD

DN

6V

DD

L4

VD

DK

13

VD

DK

4V

DD

J4

VD

DH

4V

DD

G1

3V

DD

G4

VD

DF

13

VD

DD

9V

DD

D8

VD

DD

7

VS

SM

5V

SS

K9

VS

SK

8V

SS

J1

0V

SS

J9

VS

SJ8

VS

SJ7

VS

SH

10

VS

SH

9V

SS

H8

VS

SH

7V

SS

G9

VS

SG

8V

SS

E1

2

VD

DC

N5

VD

DC

H1

3V

DD

CE

5V

DD

CE

4V

DD

CD

5

VS

SC

N4

VS

SC

J1

3V

SS

CF

4V

SS

CD

10

VD

DA

0D

1V

SS

A0

J1

VD

DA

1F

16

VS

SA

1F

15

VD

DA

2E

16

VS

SA

2E

15

10nC513

R650

100

R62910K

R668

10K

R3533.3K

C2727pF

R2310K

R637

100

R6284.7K

10nC569

C5021N

R362100

11.2896MHz

B7

R615

100

R661

100

U13C

LH79524

PJ0H2

PJ1H3

PJ2G1

PJ3G2

PJ4G3

PJ5/INT5F1

PJ6/INT6E1

PJ7/INT7F3

PA0/INT2N1

PA1/INT3M2

PA2/CTCMP0AL3

PA3M1

PA4/CTCMP1AL2

PA5L1

PA6/SDAK3

PA7/SCLK2

PB0/DACKR2

PB1/DREQR1

PB2P2

PB3N3

PB4M4

PB5P1

PB6/UARTRX0N2

PB7/UARTTX0M3

PI0D3

PI1B1

PI2B2

PI3D4

PI4C3

PI5A1

PI6A2

PI7B3

INT4J3

LCDLP/PE0B12

LCDDCLK/PE1D11

PE2B13

PE3C13

PE4D12

PE5B16

PE6B15

WAIT/DEOT/PE7D14

PF0A8

PF1A9

PF2B9

PF3C9

PF4B10

PF5A11

LCDEN/PF6B11

LCDFP/PF7A12

PL0C1

LCDVD15/PL1C2

PL2A10

PL3C10

PG0A5

PG1B6

LCDVD0/PG2A6

LCDVD1/PG3C7

LCDVD2/PG4B7

PG5A7

PG6C8

PG7B8

PH0C4

PH1A3

PH2B4

PH3C5

PH4D6

PH5A4

PH6B5

PH7C6

X59

U25B

HCT126

5 6

4

C261220UF-10V

100nC281

10nC34

X31

R586

470

470pC506

U53CLVC162245A

GN

D4

GN

D10

GN

D15

GN

D21

GN

D28

GN

D34

GN

D39

GN

D45

VC

C7

VC

C3

1

VC

C4

2

VC

C1

8

&LVC08

U56C

89

10

R35510K

X65

U13B

LH79524

A0T12

A1R11

A3P10

A2T11

A4R10

A5T10

A6P9

A7R9

A8T9

A9T8

A10R8

A11P8

A12T7

A13R7

A14P7

A15T6

A16/PC0N7

A17/PC1R6

A18/PC2T5

A19/PC3P6

A20/PC4R5

A21/PC5T4

A22/PC6P5

A23/PC7R4

D0M15

D1N16

D2L13

D3M14

D4N15

D5P16

D6M13

D7N14

D8P15

D9P14

D10N13

D11T15

D12N12

D13T14

D14P12

D15T13

PK0/D16R16

PK1/D17M12

PK2/D18T16

PK3/D19R15

PK4/D20P13

PK5/D21R14

PK6/D22R13

PK7/D23N11

PN2/D24R12

PN3/D25P11

PN0/D26C11

PN1/D27A13

PL4/D28C12

PL5/D29A14

PL6/D30B14

PL7/D31C14

SDCKEG15

SDCLKF14

DQM0D13

DQM1E13

DQM2E14

DQM3G14

DCS0G16

DCS1H14

RASH15

CASH16

OEK14

WRJ16

PM0/CS0L16

PM1/CS1L15

PM2/CS2M16

PM3/CS3L14

AN0E2

AN1F2

BLE0/PM4J15

BLE1/PM5J14

BLE2/PM6K16

BLE3/PM7K15

L17

BLM21A102S

X57

U25EHCT126V

CC

14

GN

D7

R649

100

10nC3710n

C581

L21

BLM41P800S

10nC514

C500100uF-6.3V



Input Amplifiers, PCB 1, sheet 2(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

TRG_LVL_A

FILTER_B TRG_LVL_B

FILTER_A

FILTER_BTRG_LVL_B

TRG_LVL_A

FILTER_A

TRG_LVL_A1

TRG_LVL_B1

+12VI

+5VAI+5VBI

-5.2VAI-5.2VBI

+5VAI-5.2VAI

-5.2VAI

+5VAI+12VI

+5VAI

-5.2VAI

+12VI

-5.2VBI

-5.2VBI

+5VBI+12VI +5VBI

-5.2VBI

+12VI

-5.2VAI

-5.2VAI

-5.2VBI

-5.2VAI

+5VBI+5VAI

-5.2VAI

+5VBI

+5VBI

-5.2VBI -5.2VAI

+5VAI

+5VAI5+5VBI5

-5.2VAI5-5.2VBI5

+12VI5

IMP A5ATT A5

AC/DC A5COM A5

FILTER_A5

IMP B5ATT B5

AC/DC B5COM B5

FILTER_B5

REAR PANEL INPUT A9

REAR PANEL INPUT B9

AN 6

B 6

BN 6

A 6

LE

LE

L55

BLM21A102S

R244

47

1M

R191

R613

1K

10NC125

C9

1.5pF-500V

BAV99

D10

C143

3-10PF

10nC167

R184220

R24168

R177120

K2A

UD2

34

2

C1622.2UF-6.3V

Q13BFR92A

R181150

R248120

R163120

R188470K

R251150

R167

47

C151100NF

K7A

UD2

34

2

BAV99

D17

R16047

10NC239

R16968

BAV99

D20

K4A

UD2

34

2

-

+

U2A

LMC6081A

3

26

C12222NF-200V

R215

680K

BFT93Q7

Q5BFR92A

R237120

R212

47

C132100NF

J10

BNC-COAX

C144Not Used

X34

Q16BFR92A

BAV99D31

R148680K

R24612K

C2027PF

10NC503

+

-

K6CUD2

18

R205180K

R19510K

C140

47P

R254470K

10NC227

Q10BFR93A

K1A

UD2

342

R216

220K

C2410PF-500V

R2111K

Q14BFR92A

10NC156

R6101.2M

R173

47

R193

330

R236120

R253150

C133100NF

R247120

R1801K

C1173.9pF-100V

R182470K

R220680K

R19947K

R213

470K

10NC158

10NC240

R179150

R2333.3

10NC163

C7

1.5pF-500V

R229470K

X35

R17068

C1232.2UF-6.3V

C126100NF

+

-

K1CUD2

18

R15547K

BAV99D34

R194

27

BAV99

D12

Q2BFR93A

U1BLMC6081A

V+

7

V-

4

R223

47

R18310K

10n

C98

C496

2.5-10PF/250V

R165120

R145

100

K4B

UD2

65

7

+

-

U50A

TLE2022C

2

31

C139100NF

R189470K

C165100NF

R1901K

R17412K

R18727

10NC229

R132

100

R176120

100KR159

R207

100

R138

0

R14910M

C260Not Used

R2031.5K

10NC124

J7A


R201

470

+

-

K8CUD2

18

R1581M

R135

10

R218

47

L54

BLM21A102S

C146

27pF

C159100NF

C107100NF

R250120

10NC100 C101

100NF

BAV99

D18R6111.2M

R2241K

BAV99D33

10NC19

R196100K

R171

4.7K

R234120

R16882

X36

1M

R262R260470K

R222

47

C213.9PF-500V

R214

120K

C129100NF

BAT18D15

-

+

U1A

LMC6081A

3

26

R202100

R219330

C131

3.9pF-500V

R249120

BAT18D14

R261470K

BAV99D30

R1533.3

C11839pF

C103100NF

C152100NF

C160100NF

R235120

C1153.9pF-100V

10NC164

R24268

R258120K

R1920

C166100NF

R142

120K

R1851K

R239

47

C120100NF

+

-

K5CUD2

18

10NC105

+

-

K2CUD2

18

R157

47

10NC504

BAT18D21

R141

470K

BFT93Q15

BFT92Q4

R268100K

X37

R243

4.7K

R156470K

C1163-10PF

10n

C35

10NC241

Q3BFR92A

C1493.9pF-100V

R210

100

C102100NF

U3A

ADCMP565

LE5

LE7

+10

-9

OUT2

OUT3

R1391K

C15039pF

+

-

U50B

TLE2022C

6

57

C134

2.2UF-6.3V

R146

47

10NC230

R2311M

BAV99

D11

Q1BF513

BAV99D36

C2227PF

C127100NF

BAT18D22

R200

470

100K

R154

C99

3.9pF-500V

C234Not Used

BAV99D32

R133

470

R136100

BFT92Q12

R208100

C233.9PF-500V

R238150

C130100NF

K6B

UD2

65

7

K5A

UD2

342

BAV99D37

10NC242

R2521K

R256220

Q6BFR92A

R166150

R2253.3

C11022NF-200V

+

-

K4CUD2

18

Q9BF513

BAV99

D19

U2BLMC6081A

V+

7

V-

4

PCB-Pattern

L16NH

C6

1.5PF-500V

C108

100NF

C1483-10PF

C111

3-10PF

R143

680K

PCB-Pattern

L26NH

R137100

U3B

ADCMP565

LE17

LE15

+12

-13

OUT20

OUT19

R273120K

R217

100

R209

0

C1552.2UF-6.3V

K8A

UD2

34

2

R612

1K

R19815K

C497

2.5-10PF/250V

C128100NF

10nC135

R134

470

R245

47

R22747

R2571K

R25510K

+

-

K7CUD2

18

R25927

10NC136

R151

47

R144

220K

C15422NF-200V

BAV99D35

10NC157

R206

10

R265

100

R172

47

R26710K

C14122NF-200V

C138100NF

100KR232

Q8BFR92A

R230

47

R175120

R150

47

R162120

+

-

K3CUD2

18

R164120

C1612.2UF-6.3V

C112Not Used

R22847K

10n

C97

R264

27

R24082

R1613.3

C106

2.5-10PF/250V

R140

47

R2660

Q11BFR92A

C114

27pF

C1473.9pF-100V

U3CADCMP565G

ND

4V

CC

14

VE

E8

GN

D1

8

GN

D6

GN

D1

6

J8

BNC-COAX

U50CTLE2022C

V+

8

V-

4

J9A


BAV99

D13

C109

47P

R1972K

R22110M

C2510PF-500V

K2B

UD2

65

7

R263

330

100K

R226

R147330

K8B

UD2

65

7

C119100NF

R178120

K6A

UD2

34

2

K3A

UD2

34

2

C8

1.5PF-500V

10NC228

C1042.2UF-6.3V

C137

2.5-10PF/250V



Interpolators, PCB 1, sheet 3(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

AD10

AD6

AD5

AD8

AD7

AD9

R[0..3]

R0

R1

R2

R3

AD[1..10]

AD

1

AD

2

AD

3

AD

4

R0

AD1AD2AD3AD4AD5AD6AD7AD8AD9AD10

R1

AD1AD2AD3AD4

AD7AD6AD5

AD8AD9AD10

R2

AD2AD1

AD3

AD5AD4

AD6

AD8AD7

AD9AD10

R3

AD2AD1

AD5AD4AD3

AD7AD6

AD8AD9AD10

VREF1

+12VINT

+12VREF

-12VINT

+5VINT

+5VAD

+12VREF

+12VREF

-12VINT

+12VINT

+5VINT

+12VINT

+12VINT

+12VINT

+12VINT

+5VINT

+5VAD+5VAD+5VAD+5VAD

+12VA1,5,6,7

-12VA1,6,7,8

+5VA1,5,6

TRALED 2

TRBLED 2

GATELED 2

C351100NF

R481

1KQ28BF513

R402

47

R4112.2K

C13100NF

C321100NF

C336

Not_Used

R40610K

L61

BLM21A102S

R6442.2K

BFT92Q29

C363100NF

-

+

U18A

OPA277

3

26

1 8

R417

47

R403100

R522

330

U135A

ADG719

8

21

6

R405

47

U44BKM4100

V+

5

V-

2

U23A

ADC1061

INT2

S/H3

RD4

CS5

VREF-7

VIN8

VREF+9

DB218

DB119

DB020

DB614

DB515

DB416

DB317

DB713

DB812

DB911

C36115UF-6.3V

R3964.7K

U20BADC1061V

CC

1

+V

CC

6

GN

D10

C327

100p

C36415UF-6.3V

-

+

U45A

KM4100

3

41

C329

100p

R656

1.5K

C341

100NF

10nC534

R385

47

L24

BLM21A102S

C362100NF

R507330

R3754.7K

C312.2UF-6.3V

BFT92

Q59

R6402.2K

C33368P

R657

1.5K

10nC525

R40710K

BFT92Q37

C33915UF-6.3V

R505

1K

Q32BC847B

L22

BLM21A102S

L62

BLM21A102S

R65282

C14100NF

Q30BF513

BFT92Q31

C369100NF

L23

BLM21A102S

C356

Not_Used

L60

BLM21A102S

C34715UF-6.3V

C357100NF

U133BADG719V

DD

4

GN

D3

R37682

R521

330

U133A

ADG719

8

21

6

R6422.2K

U42BKM4100

V+

5

V-

2

R4084.7K

Q36BF513

R6412.2K

10nC532

U22A

ADC1061

INT2

S/H3

RD4

CS5

VREF-7

VIN8

VREF+9

DB218

DB119

DB020

DB614

DB515

DB416

DB317

DB713

DB812

DB911

R6332.2K

C34468P

C359100NF

C323

100NF

R41082

R528

22

C338100p

R40047K

C3501uF-16V

BFT92Q34

R382

100

10nC527

C368100NF

R519

330

R378

47

10nC526

C509

Not Used

R40482

R398

100

R3772.2K

10nC531

C5296.8u-16V

C322.2UF-6.3V

C340100NF

-

+

U19A

OPA277

3

26

1 8

X4R659

10

C324

100NF

C353

100NF

C512

Not Used

R513330

C331

100NFBFT92

Q63

U135BADG719V

DD

4

GN

D3

C15100NF

R414

100

C349

100p

C346

100p

C522100n

R485

1K

R395

33K

R520

330 R391

1.5K

R381100

C328100p

U134BADG719V

DD

4

GN

D3

COUNTER CIRCUIT

U11A

SpartanIIE-2

ERRP063

SH056

CS057

RD058

SH181

CS182

RD183

ERRP270

SH286

CS287

RD288

ERRP373

SH393

RES059

ERRP168

RES184

RES289

CS394

RD395

RES396

RDY060

RDY175

RDY274

RDY397

ADCDATA027

ADCDATA129

ADCDATA230

ADCDATA331

ADCDATA433

ADCDATA534

ADCDATA635

ADCDATA736

ADCDATA840

ADCDATA941

ADCDATA1043

ADCDATA1144

TRIGALED191

TRIGBLED192

GATELED193

M052

M150

M254

TMS2

TCK207

TDI159

TDO157

U98

U109

U1115

U1216

U1322

U1417

U1518

U1623

U1724

U1861

U1962

U2064

U2169

U2271

U2380

R383

47

C322100p

C325

Not_Used

U22BADC1061V

CC

1

+V

CC

6

GN

D10

U43BKM4100

V+

5

V-

2

R397

47

U132BADG719V

DD

4

GN

D3

C365100NF

R6342.2K

R660

10

C335100NF

R539

22

U18BOPA277

V+

7

V-

4

R517

330

R386

100

C360100NF

R413

100

C5286.8u-16V

C342

100NF

R389

47

R409

47R416100

U20A

ADC1061

INT2

S/H3

RD4

CS5

VREF-7

VIN8

VREF+9

DB218

DB119

DB020

DB614

DB515

DB416

DB317

DB713

DB812

DB911

C523100n

10nC533

R511330

R6432.2K

X53

C524100n

R392

4.7K

C33710PF

C292.2UF-6.3V

-

+

U43A

KM4100

3

41

C34510PF

U21A

ADC1061

INT2

S/H3

RD4

CS5

VREF-7

VIN8

VREF+9

DB218

DB119

DB020

DB614

DB515

DB416

DB317

DB713

DB812

DB911

R524

22

R484

1K

R393

47

Q35BC847B

C12100NF

C330

100NF

-

+

U42A

KM4100

3

41

C510

Not Used

L25

BLM21A102S

C511

Not Used

C352

100NF

R540

22

U134A

ADG719

8

21

6

C334

Not_Used

BFT92

Q64

R658

10

C5076.8u-16V

C366100NF

R3992.2K

U132A

ADG719

8

21

6

R3872.2K

U45BKM4100

V+

5

V-

2

C348100p

U21BADC1061V

CC

1

+V

CC

6

GN

D10

R6452.2K C355

68P

R515

330

X54

X3

C32668P

C35815UF-6.3V

C370100NF

R3844.7K

C36715UF-6.3V

R39415K

L59

BLM21A102S

Q33BF513

U19BOPA277

V+

7

V-

4

-

+

U44A

KM4100

3

41

BFT92

Q65

L26

BLM21A102S

R380

10

R508330

C5306.8u-16V

U23BADC1061V

CC

1

+V

CC

6

GN

D10

R379

1.5K

C302.2UF-6.3V

10nC332

R390100



Miscellaneous, PCB 1, sheet 4(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

PREKOD2

PREKOD1

PREKOD0

+5VD

+3.3VD

+5VD

+5VD

+5VD

+5VD

+5VD

+5VD

+5VD

+5VD

+1.8VFPGA

+3.3VFPGA

+3.3VFPGA

+1.8VFPGA

+3.3VFPGA

SDA2SCL2

+5VD1,2,6,7,8

+3.3VD1,2,6,7,8

OPCLK6+3.3VD1,2,6,7,8

SCL2SDA2

PRESC ON6

+5VD1,2,6,7,8

+12VA1,4,6,7

PRESC TEST6

+5VD1,2,6,7,8

OPTION6

OPCLK6+3.3VD1,2,6,7,8

SCL2SDA2

+12VA1,4,6,7

+5VA1,4,6

-5.2VI7

+15VD7,8

IMP A 3

ATT A 3

AC/DC A 3

COM A 3

FILTER_B 3

BURST 6

C 6

BURST 6

FILTER_A 3

+12VI 3

+5VAI 3

+5VBI 3

-5.2VAI 3

-5.2VBI 3

AC/DC B 3

IMP B 3

ATT B 3

COM B 3

PREKOD0 8

PREKOD2 8

PREKOD1 8

+1.8V7

+3.3VFPGA 2

PRES CAL ERCONNECT OR

OPT I ONCONNECT OR

10nC249

R4182.2K

R444

6.8K

C292100NF

C477100NF

C5801n

R4432.2K

C291100NF

L50

BLM21A102S

C297100NF

C3431n

C575100uF-6.3V

R4372.2K

L16

BLM41P800S

R565

330

C271100NF

10NC238

C481100NF

L51

BLM21A102S

C420

1n

10NC3

C473100NF

C272100NF

R428

NOT USED

10NC2

R4402.2K

C478100NF

C392

1n

R435

6.8K

C371220UF-10V

Q45BC807-25

C274100NF

C5661n

L43

BLM21A102S

R419

6.8K

J15

2X10 SMD

123456789

1011121314151617181920

C293100NF

L47

BLM21A102S

10nC320

C5371n

U40BPCA9555V

DD

24

VS

S1

2

Q44BC807-25

C372100NF

C273100NF

L49

BLM21A102S

C3731n

C384100uF-6.3V

C299100NF

C267100NF

Q39BC807-25

10NC237

10NC245

10NC244

10NC475

L46

BLM21A102S

TMP

U39A

LM75

SDA1

SCL2

A07

A16

A25

O.S.3

C268100NF

R4342.2K

C474100NF

C300100NF

C413

1n

C253220uF-10V

R438

6.8K

C298100NF

R2

10K

C567100NF

R422

6.8K

C486100NF

C275100NF

10NC246

L40

BLM21A102S

C479100NF

C5821n

Q40BC807-25

C423100uF-6.3V

10NC231

R4

10K

L44

BLM21A102S

C5761n

C390100uF-6.3V

10NC247

10NC236

C472100NF

C480100NF

R4212.2K

U39BLM75G

ND

4V

CC

8

C3021n

Q42BC807-25

X5

C270100NF

C295100NF

R4262.2K

C266100NF

Q41BC807-25

C418

1n

COUNTER CIRCUITU11DSpartanIIE-2

GN

D1

GN

D1

2

GN

D1

9

GN

D2

5

GN

D3

2

GN

D3

9

GN

D5

1

GN

D6

5

GN

D7

2

GN

D7

9

GN

D8

5

GN

D9

2

GN

D1

03

GN

D1

17

GN

D1

24

GN

D1

31

GN

D1

37

GN

D1

44

GN

D1

58

GN

D1

70

GN

D1

77

GN

D1

83

GN

D1

90

GN

D1

97

VC

CO

13

VC

CO

26

VC

CO

38

VC

CO

53

VC

CO

66

VC

CO

78

VC

CO

91

VC

CO

10

5

VC

CO

11

8

VC

CO

13

0

VC

CO

14

3

VC

CO

15

6

VC

CO

17

1

VC

CO

18

4

VC

CO

19

6

VC

CO

20

8

VC

CIN

T14

VC

CIN

T28

VC

CIN

T37

VC

CIN

T67

VC

CIN

T76

VC

CIN

T90

VC

CIN

T11

9

VC

CIN

T12

8

VC

CIN

T14

2

VC

CIN

T17

2

VC

CIN

T18

6

VC

CIN

T19

5

R441

6.8K

C296100NF

R564

330

C265100NF

R427

6.8K

C483100NF

C280100NF

C269100NF

R431

0

C276100NF

C3791n

J16

2X10 SMD

123456789

1011121314151617181920

10nC248

R4302.2K

C425100uF-6.3V

Q38BC807-25

10NC232

L41

BLM21A102S

C5771n

L48

BLM21A102S

Q43BC807-25

C5791n

C539100uF-6.3V

C476100NF

C471100NF

10NC243

C294100NF

C277100n

10NC235

L39

BLM21A102S

C419

1n

C290100NF

C279100NF

L45

BLM21A102S

C484100NF

C391

1n

10NC470

R432

6.8K

R3

10K

U40A

PCA9555

A021

A12

A23

SCL22

SDA23

I/O0.04

I/O0.15

I/O0.26

I/O0.37

I/O0.48

I/O0.59

I/O0.610

I/O0.711

I/O1.013

I/O1.114

I/O1.215

I/O1.316

I/O1.417

I/O1.518

I/O1.619

I/O1.720

INT1

C289100NF

L42

BLM21A102S

L20

BLM41P800S

C5381n



Oscillator Circuits, PCB 1, sheet 5(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

STD OSC ON/OFF

OVEN OSC ON/OFF

RUBIDIUM ON/OFF

PLL LOCK

LOAD PLL

AN

AN

BN

OVEN OSC ON/OFFRUBIDIUM ON/OFF

STD OSC ON/OFF

100MHz

-5.2L

100MHz

+3.3U49

+3.3U49

S/R_ON/OFF

S/R_ON/OFF

BN

100MHz

LOAD OVEN

PLL LOCK

UPRD

UPRD

+3.3V_U4 1

10MHZ_RUBIDIUM1

+12VO

-2.1V

+3.3V_PLL+3.3V_U4

+3.3V_U4

+12VO

+3.3V_PLL

+3.3VD

-5.2VA

+3.3VD

-5.2VA

-2.1V

-2.1V -2.1V

-2.1V

+5VD+3.3VD

-5.2VA

+3.3VA +3.3VA

+3.3VA

-5.2VA

-12VA

-12VA

-12VA

-2.1V

+3.3V_U4

+3.3VA +3.3VA

-2.1V

-12VA-5.2VA

+3.3VA

+5VD+3.3VD

STD OSC TRIM2

SPICLK1,2SPIDATA1,2

AN3A3

PRESC ON 5PRESC TEST 5OPTION 5

OPCLK 5

C5

+12VU7

B3

+12VA1,4,5,7

+5VA1,4,5

-12VA1,4,7,8

-5.2VA7

+3.3VA7,8+3.3VD1,2,5,7,8

BURST5

BN3

+5VD1,2,5,7,8

SPIPLL2

SPIOVEN2

PLL LOCK 2

UPRD2

S T D OS C.

OVEN OS C.

16.3

mA

16.3

mA

PHAS E L OCK L OOP

C21810PF

C1681N

R33239K

C202100NF

R281

1K

U48BLVC1G04V

CC

5

GN

D3

R309

47

BAV99

D26

R568

47

L8

BLM21A102S

C17733PF

R31847

R334100

R28747

L10

BLM21A102S

C5100NF

10NC190

C185

15pF

R270

10K

R275

10K

R29447K

R32110K

U5A

LTC8043

VRef1

RFb2

SRI6

CLK7

LD5

IOut3

10NC211

L14BLM21A102S

C495NOT USED

R336Not Used

R32239K

&U12E

10E104

2324 18

17

C22210PF

L5

BLM21A102S

C22010PF

L52

BLM21A102S

10NC189

10NC225

10NC174

&ALVC00

U4B

64

5

C171100P

R609

100

R314

47

R306100

Q26BC847B

C18233PF

J2ANOT USED MINICOAX-3

10N

C203

R9

NOT USED

R304NOT USED

10NC181

BAV99D28

C210100NF

Q20BFS17

R296

100

C18668P

C175

100NF

R34368

R29310K

L12

BLM21A102S

L13

BLM21A102S

R319

47

C49822PF

C195100NF

1M

R274

R30347K

R338100

R342820

R337100

C176100P

R34122

R315

47

BAV99

D27

10NC207

R3524.7K

R27647K

C1832.2UF-6.3V

&U12A

10E104

45 8

7

10NC226

C21315UF-6.3V

L57BLM21A102S

R32547

BAV99D29

C201100NF

10NC209

R2723.3K

U7BOPA277

V+

7

V-

4

C184100P

R291

4.7K

C208100NF

Q22BFS17

R320

47

X52

&ALVC00

U4C

89

10

10NC214

R31068

R348100

R3292.2K

Q25BSR12

Q24BSR12

10NC494

&U12D

10E104

2526 15

14

R351

10

R295

100

R34468

R346680

10NC206

D24SMV1255-073

U9A

ADF4001

CP2

RSET/FLD1

RFINB5

RFINA6

REFIN8

CLK11

DATA12

LE13

MUXOUT14

CE10

L58NOT USED

10NC223U47B

LVC1G04 VC

C5

GN

D3

R608

100

BAV99

D25

X67

Q27BC847B

R588

NOT USED

R33547

C170100P

R307100

R326100

U49BNOT USED 1G04V

CC

5

GN

D3

10NC173

R308100

R28247

10NC212

R34722

Q21BFS17

U49A

NOT USED 1G04

2 4

-

+

U7A

OPA277

3

26

1 8

R349100

&U12B

10E104

23 10

9

R333270

R8

Not Used

R292

4.7K

L9

BLM21A102S

U6BOPA277

V+

7

V-

4

COUNTER CIRCUIT

U11B

SpartanIIE-2

PLLLOCK6

RBLOCK7

10MOVEN206

10MSTD205

10MRB204

100M185

10MPLL202

OVENCTRL5

RBCTRL4

STDCTRL3

S/R_CTRL42

A10

AN11

B20

BN21

SR45

SRN46

C47

D55

CTRL048

CTRL149

CTRL2109

CTRL3110

CTRL4188

U077

U198

U299

U3199

U4200

U5203

R2774.7K

C17822PF

Q19BFS17

U4EALVC00 G

ND

7V

CC

14

10NC216

R33110K

B1

10 MHZ / CO-08

CV In1

CV Out2

+12V3

Out4

GND5

R350680

R271220

U8CLM358

V+

8

V-

4

+

-

U8A

LM358

2

31

R27947

R31168

Q18BFS17

C187

47P

C193100NF

U9BADF4001

CP

GN

D3

AG

ND

4

AV

DD

7

DG

ND

9

DV

DD

15

VP

16

R330Not Used

L11

BLM41P800S

R6242.2K

C194100NF

R28410K

R327

47

C17922PF

-

+

U6A

OPA277

3

26

18

&ALVC00

U4A

31

2

C1691N

B2

10MHZ

U12F

10E104

VE

E1

VC

C0

16

F219

VC

C1

1

F120

VC

C0

21

R317100

L6

BLM21A102S

C204100NF

R569

150

R313

47

L7

BLM21A102S

R31222

L3

100N

R316100

10NC205

R607

100

R28510K

R286

470

R340270

C219100NF

R323100

C18033PF

C147P

C18868P

R606

100

R623470

R301NOT USED

Q23BFS17

R339150

R324100

X25

C487

22pF

L53

BLM21A102S

10NC191

&U12C

10E104

2728 13

12

C1721n

Q17BC807-25

10NC224

C192100uF-6.3V

U5BLTC8043V

DD

8

GN

D4

U47A

LVC1G04

2 4

100KR589

R305100

1M

R280

C221100NF

R328

120

D23SMV1255-073

100K

R289

C215100NF

R7

NOT USED

C217100NF

R269

47

R2782.2K

U48A

LVC1G04

2 4

100KR288

R290

4.7K

R28347K

+

-

U8B

LM358

6

57

&ALVC00

U4D

1112

13



Supply Voltages, PCB 1, sheet 6(7)


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

+5VA

POWERON

+5VD 1,2,5,6,8

+3.3VD 1,2,5,6,8

+12VA 1,4,5,6

-12VA 1,4,6,8

+5VA1,4,5,6

+15VU 1

+5VU

-15VU

+15VU

-12VA

-5.2VI

+5VA

+5VU

+5VU

+5VU

+5VU

+5VU

+5VU

+5VU

-15VU

-15VU

+15VU

+15VU

+15VU

+5VU

+15VU

-12VA

-5.2VI

+5VA

-12VA

+1.8V

+5VU

+1.8V

OFFCTRL2

ONCTRL2

FANCTRL2

-5.2VA 6

-12VA 1,4,6,8

+5VD 1,2,5,6,8

+3.3VA 6,8

+3.3VD 1,2,5,6,8

+15VU 1

+15VD 5,8

+12VA 1,4,5,6

+12VU 6

STBYLED 2

+5VA 1,4,5,6

-5.2VI 5

+1.8V 5

F ROM AC/ DCPOWERS UPPL Y

- 15V

+5V

+15V

F ANCONNECT OR

ON

OFF

REG

U129

LM2940CS-12

IN1

OUT3

GND2

GND4

R469

10

C395100NF

+

-

U35B

LM358

6

57

+

-

U30A

LM358

2

31

R578

100

+

-

U30B

LM358

6

57

X12

C398100uF-6.3V

C402100NF

X50

R4501K

REG

U123

LM2991S

IN3

OUT5

ADJ1

GND4

ON/OFF2

IN/TAB6

C257

100UF-6.3V

R488

15K

R468

10

X43

R4592.2K

X17

R4861K

1MR494

U30CLM358

V+

8

V-

4

C4001N

R602

10

X8

C397100UF-6.3V

X38

X10

Q50BC847B

C491100NF

R594

10

Q56BC807-25

Q57BCP54

R625120

R476

10

X51

X24

R487470K

R504

10

X62

X44

C48822UF-35V

C264100NF

R502

10

10nC26

R480470

U127

MIC2505

CTL1

FLG2

GATE4

GND3

IN7

IN5

OUT8

OUT6

R464

10

U29B

LVC74A

D12

CLK11

S1

0R

13

Q9

Q8

R498

10

R44910K

R447

2.2K

R479

220

C399220UF-10V

R455

10

C411100NF

C38822UF-35V

R575

100

R6176.8K

R58210K

X56

330KR489 R490

150K

U35CLM358

V+

8

V-

4

REG

U130

LM2940CS-12

IN1

OUT3

GND2

GND4

X45R581

47

R598

10

U29A

LVC74A

D2

CLK3

S4

R1

Q5

Q6

R599

10

R37268K

R471

10REG

U124

LM2991S

IN3

OUT5

ADJ1

GND4

ON/OFF2

IN/TAB6

R626120

R37447K

X16

R456

10

X39

U29CLVC74AV

CC

14

GN

D7

J19F095

12

REG

U126

LP2951CM

IN8

OUT1

SHDN3

GND4

SENSE2

ERROR5

VTAP6

FB7

R463

10R467

10

R462

10

R49610K

X46

REG

U128

LTC3412

PVIN9

PVIN216

SVIN1

FB4

PGND12

PGND213

SGND8

S/M6

SHDN/SS7

PGOOD2

RT5

ITH3

SW10

SW211

SW314

SW415

X22

J17

640445-6

123456

X23

R457

10

Q48BCP51

R571

100

R576

100

R4823.3K

R373

33K

R572

100

R597

10

R446

470

R603

10R600

10

R584

47

R4603.3K

X63

C489100NF

X40

R592

1K

X21

R4521K

C25822UF-6.3V

C56522pF

R4971K

X14

X47

R499

10

R5791.5K

1MR478

R574NOT USED

R5931K

R627120

R493

2.2K

R616820

R458

10

R492

10K

L19

4.3UH

R472

47

C407220UF-10V

R474

10

R580

3.3K

C38522UF-35V

X26

R619

1K

R621120

10NC405

R570

100

Q51BCP51

R577

100

C49022UF-35V

R454

10

X2

R475

10

R595

10

X15

+

-

U35A

LM358

2

31

C393100uF-6.3V

Q58BC847B

10nC412

C409220UF-10V

R4833.3K

X48

Q47BC847B

R473

10

X41

R465

10

C389100NF

R596

10

C38722UF-35VR470

10

R4912.2K

R601

10

C4084.7UF-35V

R4661K

L28

4.3UH

R495

33K

X9

R501

10

Q49

BCP51

R5001K

R4531K

10NC396

C263220PF

C262680PF

R573

100

R604

10

X49

R451330

Q46BC847B

REG

U118

MAX1927

IN9

SHDN6

COMP5

REF3

PWM1

GND2

POK10

FB4

LX8

PGND7

C4064.7UF-35V

C38622UF-35V

R461

10

R622120

X42

R605

10

X11

J28

176125-2

12

C493100NF

C197100NF

C401100P

R448680

R620120

C4034.7UF-35V

C404220UF-35V

R61810K

C49222UF-35V

R503

2.2K

C394100uF-6.3V

R477

10



Rear Panel, Interfaces and I/O, PCB 1, sheet 7/7


10

10

9

9

8

8

7

7

6

6

5

5

4

4

3

3

2

2

1

1

H H

G G

F F

E E

D D

C C

B B

A A

G0G1G2

G6G7

G0G1G2

G5G6G7

G3

G5G4

G3G4

G[0..7]

DIRGPIB

DF1

DF5

DF7

DF4

DF0

DF2DF3

AF2AF3AF4

AF0

DF1

DF10

DF12DF11

DF8

DF4

DF6DF7

DF13

DF2

DF0

DF[0..31]

DF5

DF14

DF9

DF3

DF15

DF6

AF1AF0

AF[0..4]

+5VPO

GATEOUT

+15VRO

-12VRI

+3.3VRI

+3.3VEC

+3.3VIF

+5VPO

+5VGP

+3.3VEC

+3.3VIF

+15VRO

-12VRI

+3.3VRI +3.3VRI

+3.3VRI

+5VGP +3.3VIF

+5VGP

+3.3VIF

+3.3VRI

+5VPO

+5VPO

+5VPO

+3.3VRI

+3.3VIF

CSUSBN2

RESGPIBN2

CSGPIBN2

RDN2

WRFN2

DF[0..31]2

+15VD5,7

-12VA1,4,6,7

+3.3VA6,7

+3.3VD1,2,5,6,7

+5VD1,2,5,6,7

IRQGPIB 2

IRQUSB 2

AF[0..4]2

PREKOD25PREKOD15PREKOD05

I NT ERNALREFERENCEOUT ( r ear panel )

EXT ERNALARMI NGI N ( r ear panel )

US BCONNECT OR

EXT ERNALREF ERENCEI N ( r ear panel )

GP I BCONNECT OR

R590150

R531

100

U57BLVC02G

ND

3V

CC

5

B4

6MHZ

L384.7UH

R5513.3K

R547470

C469100NF

C41622PF

C44833PF

U41EHCT126V

CC

14

GN

D7

U131

MAX961

+IN1

-IN2

SHDN3

LE4

VCC8

QN7

Q6

GND5

R5451.5K

R555

470

R5322.2K

10nC28

C429

100NF

C410100NF

BAT54S

D53

R53710

C43422UF-35V

C18NOT USED

C452100NF

R5064.7K

C41522PF

BAV99D46

U38A

LVC424 5A

OE22

DIR2

A03

A14

A25

A36

A47

A58

A69

A710

B021

B120

B219

B318

B417

B516

B615

B714

USB

U34A

ISP1181B

AD038

D135

D234

D333

D432

D531

D630

D729

D828

D927

D1024

D1123

D1222

D1321

D1420

D1519

A039

ALE42

CS43

RD40

WR41

INT15

SUSPEND9

WAKEUP8

DREG11

DACK12

EOT10

BUS_CONF118

BUS_CONF017

GL7

X1

48

X2

47

VBUS6

D-4

D+5

RESET44

CLKOUT45

10MHZ

B6

C43115uF-6.3V

U34BISP1181B

VC

C1

VC

C_3

,337

TE

ST

113

TE

ST

214

TEST316

GN

D25

GN

D36

GN

D46

RE

GG

ND

2

VR

EG

_3

,33

VR

EF

26

C466100NF

R591150

U32CLVC74AV

CC

14

GN

D7

R5254.7K

R583

47

C4NOT USED

C467100NF

L631uH

R541

10K

R509

470

C4352.2UF-6.3V

U32B

LVC74A

D12

CLK11

S1

0R

13

Q9

Q8

U38BLVC4245AV

CC

A1

VC

CB

23

VC

CB

24

GN

D1

1

GN

D1

2

GN

D1

3

C44515PF

C43322PF

R53522

C42882P

R5582.2K

X18

J25B

GPIB-57LE

REN17

IFC9

NDAC8

NRFD7

DAV6

EOI5

ATN11

SRQ10

C450

100NF

GPIBCNTRL

U37A

TNT4882

DRQ32

RDY138

X0

95

X1

96

A015

A116

A217

A318

A419

D039

D142

D243

D344

D446

D547

D649

D750

D811

D910

D109

D117

D126

D135

D143

D152

CS55

WR64

RD63

RESET67

INTR34

TRIG23

IO192

IO291

IO389

IO488

IO580

IO677

IO774

IO871

SRQ76

ATN73

EOI85

DAV84

NRFD82

NDAC81

IFC79

REN70

ABUS14

BBUS62

DACK33

BURST_RDN31

FIFO_RDY30

SWAP29

REM28

ABUS_OEN20

BBUS_OEN1

PAGED26

CPUACC22

MODE53

TADCS21

LADCS66

DACS51

KEYRST100

KEYCLK98

KEYDQ99

Q55BFS17

&ALVC00

U33D

1112

13

R56210K

C42222UF-35V

1M

R543

D50BYD17G

J25A

GPIB-57LE

DIO11

DIO22

DIO33

DIO44

DIO513

DIO614

DIO715

DIO816

10nC454

L29

BLM21A102S

R5521K

L36

BLM21A102S

R5141.5K

U31BLMH6624

V+

7

V-

4

J22A

USB TYPE B

VBus1

D-2

D+3

GND4

R538120

C449100NF

NC52

U37BTNT4882V

DD

12

VD

D2

4V

DD

36

VD

D4

0V

DD

58

VD

D6

9

VD

D6

0

VD

D8

7V

DD

94

GN

D4

GN

D8

GN

D13

GN

D27

GN

D25

GN

D35

GN

D37

GN

D41

GN

D45

GN

D48

GN

D54

GN

D56

GN

D57

GN

D59

GN

D61

GN

D65

GN

D68

GN

D72

GN

D75

GN

D78

GN

D83

GN

D86

GN

D90

GN

D93

GN

D97

R55715

R53422

C41710p

COUNTER CIRCUIT

U11E

SpartanIIE-2

GET112

E126

EXTREF198

U24100

U25101

U26102

U27108

U28113

U29187

EXTREFCTRL189

INTREFOUT201

PULSEOUT194

GPIBDIR111

L30

BLM21A102S

U 41C

HCT126

9 8

10

C440

100NF

C44733PF

R523

4.7K

&ALVC00

U33A

31

2

C443

2.2PF

U41B

HCT126

5 6

4

R5532.2K

C44615PF

C463100NF

R549

470

R512

470

R516

15K

D51BYD17G

C465100NF

R56310K

C414

10PF

R54891K

C436100NF

L31

4.7UH

U33EALVC00G

ND

7V

CC

14

L374.7UH

L34

BLM21A102S

U32A

LVC74A

D2

CLK3

S4

R1

Q5

Q6

C441

10PF

R5461.5K

R5150

X20

X19

R662470

C468100NF

1

U57A

LVC02

2

14

J21

BNC-COAX

X61

C462100NF

R16

47

R55947

R5614.7K

+

-

U31A

LMH66242

36

&ALVC00

U33B

64

5

Q54BFG16A

R526

100

X64

J26BNC-COAX

Q53BFG16A

R544100

L32

BLM21A102S

R536

47

C437100NF

C430100NF

BAV99D48

R533

100

C424

1NR5304.7K

R5181K

C421100NF

U 41D

HCT126

12 11

13

C46422UF-35V

U41A

HCT126

2 3

1

C505100NF

100KR560

C451100P

C17100P

R5293.3KC427

33PF

C438

100NF

&ALVC00

U33C

89

10

R527

47

J23

BNC-COAX

L33

BLM21A102S

C439

100NF

C442

3-10PF

C453100NF

R510

470

C444

100NF

L35

BLM21A102S

C43233pF

R554

47

C1122pF

BAV99D52

C10100NF

C1622PF

40MHZ

B5

Display & Keyboard, PCB 2, Component Layout


Display & Keyboard, PCB 2


5

5

4

4

3

3

2

2

1

1

D D

C C

B B

A A

V0

V0

V1

V4

V0

V2

V3

V3

V2

V1

V4

+3.3V

+5V

+3.3V

+3.3V

+3.3V

+3.3V

+5V

+3.3V

Title

Size Document Number Rev

Modify Date: Sheet o f

Project

01

Display and Keyboard Board

Pendulum Instruments AB

A2

1 1

4031 100 65860May 28, 2004

CNT-90/91

Web Site = www.pendulum.se

15.0 - 17.6 V

STDBY GATE TRIGATRIGB

TO

BASIC

BOARD

L1

10uH

S24

USER OPT

C11100nF

R18

10

H13.2 PLATED SQUARE PAD

S20

INPUT A

C7

100nF

C15100nF

S3

UP

C1622uF-6.3V

R1

47

U1CLM358

V+

8

V-

4

S18

F7

+

-

U2A

LM358

2

31

C533pF

S10

C

S14

F3

D3EL414GD

J1FPC 20

NC

1N

C2

NC

3N

C4

NC

5N

C6

FR

7LP

8D

OF

F9

EIO

10

VD

D11

VS

S12

V4

13

V1

14

V0

15

NC

16

NC

17

NC

18

NC

19

NC

20

S25

HOLD/RUN

L2

BLM21A102S

U3BPCA9555V

DD

24

VS

S12

S21

INPUT B

C9100nF

H23.5 PLATED

R5

10

R13

10

C13100nF

S8

RIGHT

C222.2uF-35V

S19

StandBy

C8100nF

C1100nF

U2CLM358

V+

8

V-

4

S1

MEAS FUNC

R334.7K

R174.7K

S6

LEFT

C202.2uF-35V

S15

F4

D4EL414GD

TP3

R20

47

C1822uF-6.3V

PROBE GND1

U3A

PCA9555

A0

21

A1

2A

23

SC

L22

SD

A23

I/O

0.0

4I/O

0.1

5I/O

0.2

6I/O

0.3

7I/O

0.4

8I/O

0.5

9I/O

0.6

10

I/O

0.7

11

I/O

1.0

13

I/O

1.1

14

I/O

1.2

15

I/O

1.3

16

I/O

1.4

17

I/O

1.5

18

I/O

1.6

19

I/O

1.7

20

INT

1

R35

Not used

S26

RESTART

1MR2

H33.5 PLATED

S22

SETTINGS

470K

R4

320x97 DOTSE1TM32097AGFG

+

-

U1B

LM358

6

57

C6100nF

R10

10

C2522uF-6.3V

820KR8

S13

F2

TP2

C19

100nF

C10100nF

PROBE GND2

S2

AUTO SET

C44.7uF-35V

R194.7K

S11

DOWN

REG

U4

TPS61045

L1

VIN2

CTRL5

GND6

SW8

DO3

FB4

PGND7

S16

F5

D5EL414GD

R14

10

H43.5 PLATED

R34.7K

S4

VALUE

R6

Not used

S23

MATH/LIM

+

-

U1A

LM358

2

31

C14100nF

C34.7uF-35V

R16

10

TP4J2FPC 20

NC

1

V0

2

V2

3

V3

4

VS

S5

MD

6

FR

7

LP

8

DO

FF

B9

XC

K10

DI7

11

DI6

12

DI5

13

DI4

14

DI3

15

DI2

16

DI1

17

DI0

18

VD

D19

NC

20

S12

F1

+

-

U2B

LM358

6

57

C12100nF

100KR9

S7

ENTER

C21

100nF

D2EL414ID

C17100nF

S9

STAT PLOT

S17

F6

R344.7K

TP5

S5

OK EXIT

R74.7K

C232.2uF-35V

C2422uF-6.3V

10BQ030

D1

J3

2x10 SMD

1234567891011121314151617181920

R11

10

R1533K

TP1



Chapter 10

Appendix

How to Replace SurfaceMounted Devices

Most of the components in this instrument are mounted on the

surface of the board instead of through holes in the board.

These components are not hard to replace but they require an-

other technique. If you do not have special SMD desoldering

equipment, follow the instructions below:

10-2 How to Replace Surface Mounted Devices

Figure 10-1 Heat the leads and push a thin aluminum

sheet between the leads and the pca.

Figure 10-2 When removed, clean the pads with

desoldering braid.

Figure 10-3 Place solder on the pad.

Figure 10-4 Solder all leads with plenty of solder, don’t

worry about short-circuits at this stage.

Figure 10-5 Remove excessive solder with desoldering

braid..

Figure 10-6 Use a strong magnifying glas to make sure

there are no short/circuits or unsoldered

leads.

Figure 10-7 Attach the IC to the pad with solder.

Electrostatic Discharge

Almost all modern components have extremely thin conduc-

tors and metal oxide layers. If these layers are exposed to elec-

trostatic discharge they will break down or perhaps even

worse, be damaged in a way that inevitably will cause a break-

down later on. The Electro-Static Discharge sensitivity of

MOS and CMOS semiconductors have been known quite a

while, but nowadays bipolar semiconductors and even preci-

sion resistors are ESD sensitive. Consider therefore all com-

ponents, pc-boards and sub-assemblies as sensitive to electro-

static discharge. The text below explains how you can mini-

mize the risk of damage or destroying these devices by being

aware of the problems, and learning how to handle these com-

ponents.

ESD sensitive options are packed in conductive containers

marked with this symbol.

• Never open the container unless you are at an ESD pro-

tected work station.

• Use a wrist strap grounded via a high resistance.

• Use a grounded work mat on your workbench.

• Never let your clothes come in contact with ESD sensitive

equipment even when you are wearing a grounded wrist

strap.

• Never touch the component leads.

• Never touch open connectors.

• Use ESD-safe packing materials.

• Use the packing material only once.

• Keep paper and nonconductive plastics etc. away from your

workbench. These may block the discharge path to ground.

Glossary

C

Calibration Ad-

justments

How to restore an instrument to perform in

agreement with its specifications.

CSA Canadian Standards Association

E

EN 61010-1 International safety standard

F

FLASH PROM Electrically erasable and reprogrammable

non-volatile semiconductor memory.

FPGA Field Programmable Gate Array

G

GPIB General Purpose Instrumentation Bus used for

interconnecting several measuring instruments

to a common controller.

I

I2C-bus An internal address and data bus for communi-

cation between microcontroller, measuring logic,

and options.

IEC International Electrical Commission

L

LCD Liquid Crystal Display

O

OCXO Oven-Controlled X-tal Oscillator

P

PCA Printed Circuit Assembly

PCB Printed Circuit Board

Performance

Check

A procedure to check that the instrument is

functionally operational and performs to its

specification. Must not require opening of cabi-

net. If the instrument passes the check it is con-

sidered calibrated.

PLL Phase-Locked Loop

Prescaler RF frequency divider

PWM Pulse Width Modulation

U

UCXO Un-Compensated X-tal Oscillator

USB The Universal Serial Bus is a simpler alternative

to GPIB.

Electrostatic Discharge 10-3


10-4 Glossary

Chapter 11

Index

11-2 Index

Index

AAdjustments

Timebase . . . . . . . . . . . . . . . . 7-3,7-4

CCalibration . . . . . . . . . . . . . . . . . . . . 7-2

Closed Case. . . . . 4-7,4-15,6-12,6-40

Command Reference . . . . . . . . . . 7-6

General Principles . . . . . . . . . . . . 7-2

Preventive Maintenance . . . . . . . . 5-2

Procedure

Timebase . . . . . . . . . . . . . . . . . 7-4

Voltage . . . . . . . . . . . . . . . . . . . 7-5

Test Equipment. . . . . . . . . . . . . . . 2-2

Caution Statements . . . . . . . . . . . . . 1-2

Circuit Symbols . . . . . . . . . . . . . . . . 9-2

CMOS

Logic Levels . . . . . . . . . . . . . 6-4,6-32

Communication Interfaces . . . . 4-9,4-17

Component Numbers. . . . . . . . . . . . 9-2

Crystal Oscillators

Adjustment . . . . . . . . . . . . . . . . . 7-14

Calibration . . . . . . . . . . . . . . . . . . 7-3

DDefault Settings . . . . . . . . . . . . . . . . 2-3

Display

Description . . . . . . . . . . . . . . 4-6,4-14

EElectrostatic Discharge

SEE ESD

EMI Filter

Location of . . . . . . . . . . . . . . 4-9,4-17

ESD . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Ext. Arming Input

Performance Check . . . . . . . . . . . 2-6

Ext. Ref. Input

Description . . . . . . . . . . . . . . 4-8,4-16


External Arming

Input Location. . . . . . . . . . . . 4-9,4-17

External Reference

Adjustment . . . . . . . . . . . . . . . . . 7-13

Input Location. . . . . . . . . . . . 4-9,4-17

FFan

Replacing . . . . . . . . . . . . . . . . 3-3,5-3

Fan Control

Description . . . . . . . . . . . . . . 6-7,6-35

Firmware Upgrade

Instructions . . . . . . . . . . . . . . . . . . 5-2

Frequency Range


Front Panel

LCD Drivers . . . . . . . . . . . . . 4-6,4-14

GGPIB Communication

Location of Connector. . . . . . 4-9,4-17

Grounding . . . . . . . . . . . . . . . . . . . . 1-2

HHold-Off Function


IImportant Information. . . . . . . . . 5-3,5-4

Input Amplifiers

AC/DC Coupling . . . . . . . . . . 4-6,4-14

Adjustment . . . . . . . . . . . . . . . . . 7-12

Attenuator. . . . . . . . . . . . . . . 4-6,4-14

Buffer . . . . . . . . . . . . . . . . . . 4-6,4-14

Comparator . . . . . . . . . . . . . 4-7,4-15

Crossover Switch . . . . . . . . . 4-7,4-15

Filter . . . . . . . . . . . . . . . . . . . 4-6,4-14

General Description . . . . . . . 4-6,4-14

Impedance Converter . . . . . . 4-6,4-14

Impedance Selector . . . . . . . 4-6,4-14

Limiter . . . . . . . . . . . . . . . . . 4-6,4-14

Logic Level Conversion . . . . 4-7,4-15

Trigger Level Generation . . . 4-7,4-15

Troubleshooting . . . . . . . . . . 6-8,6-36

Int. Ref. Output

Description . . . . . . . . . . . . . . 4-8,4-16



Location of . . . . . . . . . . . . . 4-10,4-18

Internal Reset

Processor Circuits . . . . . . . . 4-8,4-16

KKeyboard

Description . . . . . . . . . . . . . . 4-6,4-14


LLine Voltage . . . . . . . . . . . . . . . . . . . 1-4

MMeasuring Functions


Measuring Logic

Description . . . . . . . . . . . . . . 4-8,4-16

FPGA . . . . . . . . . . . . . . . . . . 4-8,4-16

Interpolators . . . . . . . . . . . . . 4-8,4-16

Troubleshooting . . . . . . . . . . . . . 6-55



Microprocessor Bus & Interfaces


NNegative ECL

Logic Levels . . . . . . . . . . . . . 6-4,6-32

OOperating Conditions . . . . . . . . 6-4,6-32

Operation. . . . . . . . . . . . . . . . . . . . . 1-2

Options

Location of . . . . . . . . . . . . . . . . . . 3-2

Oscillator Circuits

Description . . . . . . . . . . . . . . 4-7,4-15

Oscillators

Calibration . . . . . . . . . . . . . . . 7-3,7-4

Oven Oscillator


PPerformance Check

Frequency Range . . . . . . . . . . . . . 2-4

Front Panel Controls. . . . . . . . 2-2,2-3

General Information . . . . . . . . . . . 2-2

Hold Off Function . . . . . . . . . . . . . 2-7

Input Controls . . . . . . . . . . . . . . . . 2-5

Measuring Functions . . . . . . . . . . 2-6

Rear Inputs/Outputs . . . . . . . . . . . 2-6

Reference Oscillators . . . . . . . . . . 2-5

Resolution . . . . . . . . . . . . . . . . . . 2-5

RF Options . . . . . . . . . . . . . . . 2-7,2-8

Sensitivity . . . . . . . . . . . . . . . . . . . 2-4

Test Equipment. . . . . . . . . . . . . . . 2-2

Trigger Indicators . . . . . . . . . . . . . 2-4

Voltage . . . . . . . . . . . . . . . . . . . . . 2-4

Positive ECL

Logic Levels . . . . . . . . . . . . . 6-4,6-32

Power Supply

Description . . . . . . . . . . . . . . 4-8,4-16


Power Supply Inlet

Location of . . . . . . . . . . . . . . 4-9,4-17

Power-On Tests . . . . . . . . . . . 4-10,4-18

Prescaler

Adjustment . . . . . . . . . . . . . . . . . 7-14

RF Option. . . . . . . . . . . . . . 4-10,4-18


Primary Circuits

Repair. . . . . . . . . . . . . . . . . . 6-4,6-32

Index 11-3

Processor Circuits

Description . . . . . . . . . . . . . . 4-8,4-16

Protective Ground

Checking the Connection . . . . . . 6-59

RRear Inputs/Outputs


Reference Oscillators


Reinstalling the Cover . . . . . . . . . . . 3-3

Removing the Cover . . . . . . . . . . . . 3-2


Checkup/Adjustment/Repair . . . . . 2-2

Resolution


RF Input


Replacing . . . . . . . . . . . . . . . . . . . 3-3

RF Options

Performance Check . . . . . . . . 2-7,2-8

SSafety Components . . . . . . . . . . . . 6-59

Safety Inspection . . . . . . . . . . 6-59,6-60

Sensitivity


Signals. . . . . . . . . . . . . . . . . . . . . . . 9-2

Special Parts . . . . . . . . . . . . . . . . . . 8-2

Standard Parts . . . . . . . . . . . . . . . . . 8-2

Surface Mounted Devices . . . . . . . 10-2

TTest After Repair . . . . . . . . . . 6-59,6-60

Test Routines

Built-in . . . . . . . . . . . . . . . . 4-10,4-18

Tests

Internal Self-Tests. . . . . . . . . . . . . 2-2

Keyboard . . . . . . . . . . . . . . . . . . . 2-2

Short Form Specification. . . . . 2-4,2-5

Timebase

Calibration . . . . . . . . . . . . . . . . . . 7-3

Timebase Reference

Standard Oscillator . . . . . . . . . . . 6-12

Timebase Reference Circuits


Trigger Indicators


Troubleshooting

100 MHz Multiplier . . . . . . . 6-13,6-41

External Reference Circuits 6-13,6-41

Input Amplifiers. . . . . . . . . . . 6-8,6-36

Measuring Logic . . . . . . . . . . . . . 6-55

Microprocessor & Memories . . . . 6-43

Microprocessor Bus & Interfaces 6-49

Oven Oscillator . . . . . . . . . . 6-12,6-40

Power Supply . . . . . . . . . . . . . . . 6-32

Prescaler . . . . . . . . . . . . . . . . . . 6-43

Timebase Reference Circuits. . . . . . .6-12,6-40

TTL

Logic Levels . . . . . . . . . . . . . 6-4,6-32

UUtility Program . . . . . . . . . . . . . . . . . 5-3

VVoltage


WWarning Statements. . . . . . . . . . . . . 1-2

Watchdog

SEE Internal Reset Circuit


11-4 Index

Documents

PM6690 SM Ed4 sharp 3 - Fluke Corporationassets.fluke.com/manuals/6690____smeng0000.pdf · 2006-06-27 · GENERAL INFORMATION Method of Notation ThismanualcontainsdirectionsandinformationthatapplytothePM6690Timer/Counter/Analyzer.Inordertosimplifythereferences,