DAR Plus Operator_s Guide 400468-1 Rev C

Operator’s Guide

DAR Plus

Analog or DigitalMicrowave Radio System

Appendix A -

System Connections

Table of Contents

Section 1 -

System Overview

Document: 400468-1 Revision C September 2003

Section 2 -

System Installation

Section 3 -

Operating Controls

Section 4 -

Summary Alarms

Appendix B -

Modules

Appendix C -

Frequency Settings

SoftwareRelease

1.0

PROPRIETARY NOTICE

The information and design contained within this manual was originated by and is the property of Microwave Radio Communications. Microwave Radio Communications reserves all patent proprietary design, manufacturing, reproduction use, and sales rights thereto, and to any articles disclosed therein, except to the extent rights are expressly granted to others. The foregoing does not apply to vendor proprietary parts.

To allow for the introduction of design improvements, specifications are subject to change withoutnotice.

©2003 Microwave Radio Communications

Printed in the U.S.A.

August 2003

Revision ECO Date

A March 2002

B 3143-2 August 2003

C 3203-2 September 2003

Microwave Radio Communications101 Billerica Avenue – Bldg 6North Billerica, MA 01862-1256USA

TEL:

(978) 671-5700

FAX:

(978) 671-5800

Caution:

1. Read all of these instructions.2. Save these instructions for later use.3. Follow all warnings and instructions

marked on the units.

Read Instructions

- All safety and operating instructions should be carefully read before operating the equipment.

Retain Instructions

- The safety and operating instructions should be retained and stored in a convenient place for future

reference.

Heed Warnings

- All warnings on this equipment, and in the operating instructions should be strictly adhered to.

Follow Instructions - All operating and user instructions should be properly implemented for optimum and safe

performance.

Cleaning

- Do not use liquid cleaners or aerosol cleaners. Instead, use only a damp cloth for cleaning.

Attachments

- Do not use attachments not authorized by Microwave Radio Corporation. Using unauthorized

attachments may create safety hazards or damage the equipment.

Water and Moisture

- Indoor equipment is not designed to withstand water or moisture beyond the limits noted in the product

specifications.

Accessories

- Do not place equipment on an unstable cart, stand, tripod, bracket, or table. The product could fall, causing

serious personnel injury or damage the equipment. Use only equipment recommended by Microwave Radio Corporation. When mounting or installing the equipment, follow the manufacturer's instructions.

Power Sources

- The equipment should be operated only from the type of power source indicated on the unit, or in the operating

instructions. For 220 VAC operation, the proper power cord must be used.

Grounding or Polarization

- AC powered versions of this product are equipped with a 3-wire plug with an integral grounding pin.

This plug fits into a standard, grounded power outlet. If you are unable to insert the plug into the outlet, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the grounded plug.

Power Cord Protection

- Power supply cords should be routed so that they are not likely to be walked on or pinched by other

equipment items. Pay particular attention to cords at plugs, convenience receptacles, and at the point where they enter and exit the equipment.

Object or Liquid Entry

- Never spill liquids or insert objects of any kind through openings in the equipment. Such actions

can result in fire or electric shock.

Damage Requiring Servic

e - Unplug the radio product from the power outlet and contact service personnel when the

following conditions occur:

1. If the power supply cord or plug has been damaged.

2. If liquid has been spilled in the equipment, or objects have fallen into the equipment.

3. If the equipment does not operate normally by following the operating instructions and adjusting only those controls that are covered by the operating instructions. Improperly adjusting or tampering with controls not covered in the operating instructions may result in damage to the equipment or require extensive work by a qualified technician to restore the radio to its normal operation.

When the equipment exhibits a distinct change in performance indicating the need for service.

Replacement Parts

- When replacing parts is required, use only parts authorized by Microwave Radio Corporation.

Unauthorized substitutions could result in fire, electric shock, or damage to the equipment.

Safety Check

- Upon completing any service or repairs to the equipment, ensure that safety checks are performed to

determine that the equipment is in proper operating condition.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Important Safeguards

Notes

v

DAR Plus Operator’s Guide 400468-1 Rev. C

1 System Overview .............................................................................................1-1

1.1 Introduction ........................................................................................................... 1-11.1.1 Modulator/Demodulator Options ................................................................... 1-11.1.2 Operating Controls ......................................................................................... 1-1

1.2 DAR Plus Features ................................................................................................ 1-21.2.1 Options ........................................................................................................... 1-21.2.2 Protection Options .......................................................................................... 1-21.2.3 Digital or Analog Modulation ........................................................................ 1-2

1.3 Transmitter Overview ............................................................................................ 1-3 Figure 1-1 Transmitter Block Diagram .......................................................... 1-3

1.3.1 Transmitter Chassis Layout ............................................................................ 1-4 Figure 1-2 Transmitter Chassis Layout and Interconnection ......................... 1-4

1.3.2 Receiver .......................................................................................................... 1-5 Figure 1-3 Receiver Block Diagram............................................................... 1-5

1.3.3 Receiver Chassis Layout ................................................................................ 1-6 Figure 1-4 Receiver Chassis Layout and Interconnection.............................. 1-6

1.4 Specifications ........................................................................................................ 1-71.4.1 General ........................................................................................................... 1-71.4.2 Transmitter ..................................................................................................... 1-71.4.3 Receiver .......................................................................................................... 1-71.4.4 Frequency Response ....................................................................................... 1-71.4.5 Analog Radio Performance ............................................................................ 1-71.4.6 Digital Specifications (Optional QM2 Modem) ............................................. 1-71.4.7 Electrical ......................................................................................................... 1-81.4.8 Environment ................................................................................................... 1-81.4.9 Interconnection ............................................................................................... 1-81.4.10 DIGITAL Specifications Summary ............................................................... 1-91.4.11 Analog Specifications Summary .................................................................... 1-9

2 System Installation ..........................................................................................2-1

2.1 Unpacking and Handling ....................................................................................... 2-12.1.1 Inspection ....................................................................................................... 2-12.1.2 Damage in Shipment ...................................................................................... 2-1

2.2 Installation Prerequisites ....................................................................................... 2-2 Figure 2-1 Rack Clearances – Top View........................................................ 2-2

2.2.1 Grounding the Equipment Rack ..................................................................... 2-32.3 Rack Installation .................................................................................................... 2-4

Figure 2-2 Rack Installation ........................................................................... 2-42.4 Equipment Rack Installation ................................................................................. 2-4

Table 2-1 Equipment Rack Specifications .................................................... 2-4 Figure 2-3 Equipment Rack Template............................................................ 2-5 Figure 2-4 Equipment Rack – Front View ..................................................... 2-6

2.5 Initial Power-up Procedure .................................................................................... 2-72.6 Power Requirements and Fuse Specifications ....................................................... 2-7

Table of Contents

vi


2.6.1 Fuse Specifications .........................................................................................2-7 Table 2-2 DAR PLus Fuse Specifications ...................................................... 2-7

3 Operating Controls ..........................................................................................3-1

3.1 Overview ...............................................................................................................3-13.1.1 Common Keypad Functions ...........................................................................3-1

Figure 3-1 Keypad Functions ......................................................................... 3-13.2 Transmitter Menus .................................................................................................3-2

Figure 3-2 Transmitter Menu Diagram........................................................... 3-23.2.1 Transmitter Main Menu ..................................................................................3-3

Figure 3-3 Transmitter Main Menu ................................................................ 3-33.2.2 Transmitter Power Supply Menu ...................................................................3-4

Figure 3-4 Tx Power Supply Menu ................................................................ 3-43.2.3 Transmitter Radio Menu ................................................................................3-5

Figure 3-5 Transmitter Radio Menu ............................................................... 3-53.2.4 Transmitter Analog Menu ..............................................................................3-6

Figure 3-6 Transmitter Analog Mode Alarm States Menu............................. 3-63.2.5 Transmitter Digital Menu ...............................................................................3-7

Figure 3-7 Transmitter Digital Alarm State Status Menu .............................. 3-73.3 Receiver Menus .....................................................................................................3-8

Figure 3-8 Receiver Menu System ................................................................. 3-83.3.1 Receiver Main Menu ......................................................................................3-9

Figure 3-9 Receiver Main Menu..................................................................... 3-93.3.2 Receiver Power Supply Menu ......................................................................3-10

Figure 3-10 Receiver Power Supply Menu .................................................. 3-103.3.3 Receiver Radio Menu ...................................................................................3-11

Figure 3-11 Receiver Radio Menu ............................................................... 3-113.3.4 Receiver Analog Channel Menu ..................................................................3-12

Figure 3-12 Receiver Analog Channel Menu............................................... 3-123.3.5 Receiver Digital Menu .................................................................................3-13

Figure 3-13 Receiver Digital Alarm State Status Menu............................... 3-13

4 Summary Alarms .............................................................................................4-1

4.1 Overview ...............................................................................................................4-1 Figure 4-1 DAR Plus Diagnostic Interconnection.......................................... 4-1

4.2 Alarm Indicators ....................................................................................................4-2 Figure 4-2 Receiver Main Screen with Alarm Window................................. 4-2

4.2.1 LED Definitions .............................................................................................4-2 Figure 4-3 DAR Plus Front Panel Display and Keypad ................................. 4-2

4.3 Transmitter Summary Alarms ...............................................................................4-34.3.1 Transmitter Power Supply Alarms .................................................................4-3

Table 4-1 Transmitter Power Supply Alarms................................................. 4-34.3.2 Transmitter Digital RF Shelf Alarms .............................................................4-3

Table 4-2 Transmitter Digital RF Shelf Alarms ............................................. 4-3

vii


4.3.3 Transmitter Analog RF Shelf Alarms ............................................................ 4-4 Table 4-3 Transmitter Analog RF Shelf Alarms ............................................ 4-4

4.4 Receiver Alarms .................................................................................................... 4-54.4.1 Receiver Power Supply Alarms ..................................................................... 4-5

Table 4-4 Rx General Power Supply Alarms ................................................. 4-54.4.2 Receiver Digital RF Shelf Alarms ................................................................. 4-5

Table 4-5 Receiver Digital RF Shelf Alarms ................................................. 4-54.4.3 Receiver Analog RF Shelf Alarms ................................................................. 4-6

Table 4-6 Receiver Analog RF Shelf Alarms................................................. 4-64.5 Alarm & Connection Referencing ......................................................................... 4-6

4.5.1 DAR Plus Transmitter Alarm Reference ....................................................... 4-7 Table 4-7 DAR Plus Transmitter Alarm Reference Table ............................. 4-7

4.5.2 DAR Plus Receiver Alarm Reference ............................................................ 4-8 Table 4-8 DAR Plus Receiver Alarm Reference Table.................................. 4-8

A System Connections ...................................................................................... A-1

Figure A-1 Rear Panel Connectors ................................................................ A-1 Table A-1 Data I/O ........................................................................................ A-2 Table A-2 Site Management - QM2 Internal Modem ................................... A-2 Table A-3 Alarm I/O ..................................................................................... A-3 Table A-4 Summary Alarm ........................................................................... A-4 Table A-5 Audio Channels ............................................................................ A-4

B Modules ......................................................................................................... B-1

B.1 DAR Plus Transmitter Modules ........................................................................... B-2 Figure B-1 Transmitter- Top View (Front Door Open)................................. B-2

B.2 DAR Plus Receiver Modules ................................................................................ B-3 Figure B-2 Receiver - Top View (Front Door Open) .................................... B-3

B.3 Tx Audio Modulator Motherboard (900426) ....................................................... B-4 Table B-1 Tx Audio Modulator Motherboard Adjustments (900426) ......... B-4 Figure B-3 Tx Audio Modulator Adjustments (900426)............................... B-4

B.4 Audio Subcarrier Generator (900100) .................................................................. B-5 Table B-2 Audio Subcarrier Generator Adjustments (900100)..................... B-5 Figure B-4 Audio Subcarrier Generator Adjustments (900100) ................... B-5

B.5 Rx Video Demodulator (906556) ......................................................................... B-6 Table 1-3 Rx Video Demodulator Adjustments (906556) ............................ B-6 Figure 1-5 Rx Video Demodulator Adjustments (906556) ........................... B-6

B.6 Rx Audio Motherboard (900414) ......................................................................... B-7 Table B-4 Rx Audio Motherboard Adjustments (900414)............................ B-7 Figure B-6 Rx Audio Motherboard Adjustments .......................................... B-7

B.7 Rx Audio Subcarrier Demodulator (900172) ....................................................... B-8 Table B-5 Rx Audio Subcarrier Demodulator (900172) ............................... B-8 Figure B-7 Rx Audio Subcarrier Demodulator (900172).............................. B-8

B.8 Rx IF Filter/Equalizer (905560) ........................................................................... B-9

viii


Table B-6 Rx IF Filter/Equalizer Adjustments.............................................. B-9 Table B-7 Jumper Configurations ................................................................. B-9 Figure B-8 Rx IF Filter/Equalizer.................................................................. B-9

B.9 IF Amp (905764) ................................................................................................ B-10 Table B-8 IF Amp........................................................................................ B-10 Figure B-9 IF Amp (905764)....................................................................... B-10

B.10 IF Limiter/Amp (905720) ................................................................................... B-11 Table B-9 IF Limiter Adjustments .............................................................. B-11 Table B-10 IF Limiter Jumper Configurations ............................................ B-11 Figure B-10 IF Limiter/Amp ....................................................................... B-11

C Frequency Settings ........................................................................................ C-1

Figure C-1 Synthesizer Switch Locations ..................................................... C-1 Table C-1 .................................................6 GHz Oscillator Switch Settings C-2 Table C-2 ..........................................12/13 GHz Oscillator Switch Settings C-2

ix


Preface

Purpose

This manual explains how to install, operate, and configure the DAR Plus Radio. It also provides troubleshooting information in order to remedy common system faults.

Audience

This manual is intended for qualified installers and service technicians who need to perform the following tasks:

• Install the DAR Plus Radio in a standard equipment rack.• Power up the unit and verify normal operation.• Troubleshoot common system faults.

Terms and Conventions

For commonly used abbreviations and acronyms, see the Glossary on page x.

Related Documents

QM2 Modem Operator’s Guide –

Instructions for installing and configuring the QM2 Modem

QM2 Intenal Modem

- Component Drawing and Schematics

QM4 Modem Operator’s Guide

– Instructions for installing and configuring the QM4 Modem

Variable Rate Modem Operator’s Guide –

Instructions for installing and configuring the Variable Rate Modem

Hot Standby Shelf Operator’s Guide

— Instructions for installing and configuring the Hot Standby Shelf.

Preface

x


Organization

This manual is divided into the following sections and appendices:Section 1

System Overview

- Description of the DAR Plus transmitter and receiver.Section 2

System Installation

- Describes how to install the DAR Plus and DAR Plus in a standard equipment rack. Also included are power connections for both AC and DC power configurations, as well as how to initially power up the modem.

Section 3

Operating Controls

- Describes the front panel LCD and keypad functions. Section 4

Summary Alarms

- Describes alarm conditions for the power supply as well as analog and digital RF channels.

Appendix A

System Connections

- System Interconnections.Appendix B

Modules

- Adjustments and Indicators for both plug-in and RF shelf components.

Appendix C

Frequency Settings

- Synthesizer switch settings for frequency bands 6,7, 12 and 13 GHz bands.

Glossary

This section describes commonly used acronyms and abbreviations used in telecommunication and those specific to Microwave Radio Communications.

Term Definition

ØLK

Phase Lock.

1RU

1 Rack Unit height.

A & C

Alarm and Control.

ADPCM

Adaptive Differential Pulse Code Modulation.

AFC Automatic Frequency Control.

AGC Automatic Gain Control.

AIS Alarm Indication Signal (all one’s).

AMI Alternate Mark Inversion, line code format for traffic data.

AVG Average.

B3ZS Bipolar 3 Zero Substitution, line code format for traffic data.

B8ZS Bipolar 8 Zero Substitution, line code format for traffic data.

BB Baseband.

BER Bit Error Rate.

BNC Bayonet lock coaxial connector.

BPF Band Pass Filter.

BPS Bits per second.

CCITT International Telegraph and Telephone Consultative Committee, a telecommunications standardizing committee of the ITU.

Composite A band or grouping of frequencies and/or subcarriers, including video, occupied by the signal in a radio transmission system. Same as baseband signal.

dB Decibel.

dBm A unit of power measurement referenced to one milliwatt.

Preface

xiDAR Plus Operator’s Guide 400468-1 Rev. C

DMUX, DEMUX

Demultiplexer

DS3 45 Mbps traffic rate

Duplex A channel capable of transmitting information simultaneously in either direction.

E1 2.048 Mbps traffic rate.

E3 34 Mbps traffic rate

EIA Electronic Industries Association, an industry association that establishes various standards.

EMC Electromagnetic compatibility.

EOW Engineering Order Wire.

ERRS Errors.

ESD Electrostatic discharge.

FCC Federal Communications Commission, the United State's communications regulatory agency.

FEC Forward Error Correction rate.

FIFO First in, first out buffer.

FIR Finite Impulse Response.

FLR MRC's model designation for frequency modulated (FM) remodulating radio systems from 2 to 15 GHz. FLR2 is the 2 GHz band version; FLR4, the 4 GHz band version, etc.

FPGA Field Programmable Gate Array.

GND Ground.

H/W Hardware.

HDB3 High Density Bipolar 3 line code format for traffic data.

HPF High Pass Filter.

I In phase

ID Identification.

IF Intermediate Frequency.

IRE 1. Institute of Radio Engineers, an international professional radio engineering association that establishes various standards.2. A unit of measurement, established by the IRE, in which 1 IRE Unit =.00714 volts peak-to-peak (Vp-p) and 140 IRE units equals 1 Vp-p.

Kbps Kilobits per second.

KHz Kilo (1,000) cycles per second.

LCD Liquid Crystal Display

Lcl Local

LED Light emitting diode.

LO Local Oscillator

LOS Loss of Signal.

Term Definition

Preface

xii DAR Plus Operator’s Guide 400468-1 Rev. C

LPF Low Pass Filter.

Mbps Megabits per second.

MHz Million (1,000,000) cycles per second.

MUX Mutiplexer.

NRZ Near Return to Zero.

PER Parity Error Rate.

PLL Phase Lock Loop.

Q Quadature phase.

QAM Quadature Amplitude Modulation

QPSK Quadrature Phase Shift Keying.

RCL/RSL Received Carrier Level.

Rcvr Receiver.

RF Radio Frequency, any frequency of electromagnetic radiation or alternating currents in the range from 3 kHz to 300 GHz; as in RF Signal or RF Transmission.

RF Level RF Power from the transmitter.

Rx Receiver.

S/W Software.

SC Service Channel.

Setpt Set point.

Simplex A channel capable of transmitting information in only one direction.

STDBY Standby.

Subcarrier An electromagnetic signal that is used as a medium for placing an information channel above another information channel.

SYNTH Synthesizer

T1 1.544 Mbps traffic rate.

T3 45 Mbps traffic rate

Tx Transmitter.

VCO Voltage Controlled Oscillator.

VCXO Voltage Controlled Crystal Oscillator.

VDC Volts Direct Current.

VF Voice Frequency.

Video A term pertaining to the bandwidth and spectrum of the signal that results from television scanning and which is used to reproduce a picture.

Xmitr Transmitter.

Xmtr Transmitter.

Term Definition

1-1DAR PLUS Operator’s Guide

1Section

400468-1 Rev. C

1 System Overview

1.1 IntroductionThe DAR Plus Radio is a versatile STL solution to satisfy a broad range of transport solutions suitable for the following applications:

• Studio-to-transmitter links and transmitter-to-studio links • Satellite backhauls• Analog news gathering backhauls (ICR) Intercity Relay• Cable headend feeds• Multi-hop networks• Support of channel plans from 10 to 28 MHz• Architecture supports FCC and ITU channel plans from 1.9 to 15.4 GHz

The DAR Plus is designed to be readily convert to digital operation—with easy jumper and dip switch changes in one transmitter module and two receiver modules. The radio can be equipped for internal or external ATSC HDTV transport using MRC’s QM2 modems. In addition, the DAR Plus used with the MRC Variable Rate Modem (MRC VRM) provides several transport options for transmit and receive ends.

1.1.1 Modulator/Demodulator Options

Internal modem cards or external modem shelf for added flexibility in placement of digital and RF circuits

• FMT/FMR Analog 525 or 625 line video with four audio subcarriers• QM2 19.39 Mbps ATSC transport stream modem with additional DS1 (1.544

Mbps) data channel• QM4 Modem - 44.736 Mbps DS3 (G.703 interface standard) channel• COFDM modulator for paths with multipath issues• PAL video and DVB-T transport stream support• Variable Rate Modem for variable data rates and band width

1.1.2 Operating Controls

All transmitter and receiver functions are controlled using the front panel LCD and display. For operating instructions, see Section 3, Operating Controls on page 3-1.

DAR Plus FeaturesSystem Overview

1-2 DAR PLUS Operator’s Guide 400468-1 Rev. C

1.2 DAR Plus FeaturesThe DAR Plus features proprietary implementation of MRC Broadcast’s extremely stable, low-noise YIG oscillator technology. It provide built-in diagnostics through front panel.

1.2.1 Options• Analog: FMT/FMR 70 MHz, IF, 4 audio subcarriers, high-power output options• Digital: Internal or external modem• QM2, 19.39 mbps modulator/demodulator• external QM4 modulator/demodulator• AC or DC conversion

1.2.2 Protection Options• Hot standby protection for transmit and receive ends• Receive diversity• Receive diversity “hitless” (QM2 internal only)

1.2.3 Digital or Analog Modulation• Single carrier FM• 16 QAM digital modulation

Transmitter Overview System Overview

1-3

1

DAR PLUS Operator’s Guide 400468-1 Rev. C

1.3 Transmitter OverviewTransmitter configurations can consist of either an internal or external digital 19.39 Mbps modulator (QM2), an FM NTSC modulator, or an external modem or multiplexer such as the MRC Variable Rate Modem or QM4 Modem. See Figure 1-1 for the transmitter block diagram.

Figure 1-1 Transmitter Block Diagram

19.4 MbpsMODEM

ATSC (19.39 Mbps)

DS1 (1.544 Mbps)

SERVICECHAN.

(9.6 kbps)

ALARMS (4 Alarms)

70 MHz

70 MHz

IRMUPCONVERTER

FMMODULATOR

NTSC

AUDIOMODULATOR

AUDIO (4 Chan.)

RF SECTION

DAR Plus Cabinet

External Modems

RL

LIMITERAMP

PLUG-INMODULES

70 MHz

DAR_Plus_Tx_BLK_1osc

Note 1 - Bit Rate and band width dependant. Contact MRC for available applications.

LOCALOSCILLATOR

X2

6 GHz

12 GHz

MULTIPLIER

AMPQM2

VARIABLERATE

MODEM(Note 1)

DS3, E3, DVB-TDVB-ASIRS-422,

LVDS ParallelDVB-SPE

19.4 MbpsMODEM

ATSC (19.39 Mbps)

DS1 (1.544 Mbps)

SERVICECHAN.

(9.6 kbps)

ALARMS (4 Alarms)

QM2

70 MHzQM4

45 MbpsDS3

Transmitter OverviewSystem Overview


1.3.1 Transmitter Chassis Layout

Figure 1-2 on page 1-4 shows the chassis layout and interconnection for the transmitter. Note that the RF modules, plug-in modules, and power supplies are located in the approximate location within the chassis.For a description of the rear panel connections, see Appendix A, System Connections.

Figure 1-2 Transmitter Chassis Layout and Interconnection

X2MULTIPLIER

(D)

FM MODULATOR (A)

AUDIO MODULATOR (A)

UPUPCONTER

LIMITER IF AMP

PO

WE

RA

MP

TR

AY

I FT

O A

NT

EN

NA

Extern

alM

od

ulato

rA

C IN

PU

T

CO

NT

RO

L M

OD

UL

E

QM2 ATSC MODEM (OPTIONAL)

FUTURE

DA

RP

LUS

_TX

_CA

B_B

LK

FR

ON

T P

AN

EL

X2MULTIPLIER

(12 GHz)PO

WE

RD

IST

RIB

UT

ION

POWER AMPPOWERSUPPLY

OSCILLATOR

6 GHz

LC

D D

ISP

LA

Y &

KE

YP

AD

POWER SUPPLY

BA

CK

PL

AN

E

CA

BIN

ET

Transmitter Overview System Overview

1-5

1


1.3.2 Receiver

Receiver configurations can consist of either an internal or external digital 19.39 Mbps demodulator (QM2), an FM NTSC demodulator, or an external demodulator or de-multiplexer such as the MRC Variable Rate Modem or QM4 Demodulator. See Figure 1-3 for the receiver block diagram.

Figure 1-3 Receiver Block Diagram

70 MHz

70 MHz

LNC

FMDemod

NTSCNTSC Video

AUDIODemod

AUDIO (4 Chan.)

RF SECTION

DAR Plus Cabinet

RL

BPFLIMITER

PLUG-INMODULES

70 MHz

(6 GHz)

QM2Demod

VARIABLERATE

MODEM(Note 1)

DS3, E3, DVB-TDVB-ASIRS-422,LVDS ParallelDVB-SPE

19.4 Mbps

ATSC (19.39 Mbps)

DS1 (1.544 Mbps)

SERVICECHAN.

(9.6 kbps)

ALARMS(4 Alarms)

QM2Demod

70 MHz QM4Demod

45 Mbps

DS3

19.4 Mbps

QM2Demod

ATSC (19.39 Mbps)

DS1 (1.544 Mbps)

SERVICECHAN.

(9.6 kbps)

ALARMS(4 Alarms)

IFAMP

LOCALOSCILLATOR

X2MULTIPLIER

Note 1 - Bit Rate and band width dependant. Contact MRC for available applications.

Transmitter OverviewSystem Overview


1.3.3 Receiver Chassis Layout

Figure 1-4 shows the chassis layout and interconnection for the receiver. Note that the RF modules, plug-in modules, and power supplies are located in the approximate location within the chassis.For a description of the rear panel connections, see Appendix A, System Connections.

Figure 1-4 Receiver Chassis Layout and Interconnection

FM DEMODULA TOR (Analog)

AUDIO DEMODULATOR (Analog)

AC

or D

C IN

PU

T

CO

NT

RO

L M

OD

UL

E

ATSC DEMODULATOR (OPTIONAL)

SPARE

RX

_CA

B_B

LK

FR

ON

T PA

NE

LL

CD

DIS

PL

AY

& K

EY

PA

D

POWER SUPPLY

BA

CK

PL

AN

E

CA

BIN

ET

X2MULTIPLIER

(12 MHz)

LNC

IF AMP

IF FILTER

LOCALOSCILLATOR

POWERDISTRIBUTION

BOARD

IF

OU

TP

UT

HD

TV, D

TV

HD

(AT

SC

)F

RO

M

AN

TE

NN

A

RF

TR

AY

6 GH

z

Specifications System Overview

1-7

1


1.4 Specifications

1.4.1 GeneralStandard Frequency Bands:..........................................6.8 to 7.1 GHz, 12.7 to 13.2 GHzOptional Frequency Bands: ..................................................Contact MRC for information

on other bands from 1.99 to 15.4 GHzCapacity, Analog: ...................................................... 525 or 625 line video, up to 4 audio

channels pilot carrier or video signal plus data above videoCapacity, Digital:........................................................................ 70 MHz modem interface

1.4.2 TransmitterType:......................................................................................................Single conversionLocal Oscillators: ........................................Ultra-low phase noise, phase-locked sourcesFrequency Stability: ...........................................................................................±0.0005%Power Output:..................................................... See Operating Specifications Summary

1.4.3 ReceiverType:......................................................................................................Single conversionLocal Oscillators: ........................................Ultra-low phase noise, phase-locked sourcesNoise Figure: ....................................................................... See Specifications SummaryIF Bandwidth:.........................................................................................................30 MHzThreshold:........................................................... See Operating Specifications SummaryVIDEO PERFORMANCE (optional FMT)(Back-to-Back with CCIR Emphasis)

1.4.4 Frequency Response10 kHz to 4.5 MHz (525 line): ..............................................................................±0.25 dB10 kHz to 5.0 MHz (625 line): ..............................................................................±0.25 dB5 MHz to 8 MHz (Baseband Output): ....................................................................±0.5 dBField Tilt: ........................................................................................................... 3 IRE maxLine Tilt: ......................................................................................................... 0.5 IRE maxBaseband Chroma Delay: .............................................................................. ±20 nS maxBaseband Chroma Gain: ................................................................................ ±2 IRE maxDifferential Phase: .............................................................................................±0.5° maxDifferential Gain: ................................................................................................... 2% maxSignal-to-Noise Ratio:.................................................Meets or exceeds RS-250C; 67 dB(See Analog Specifications Summary)Signal-to-Hum (p-p/RMS): ................................................................................. 60 dB minVideo Input Level: ....................................................................................................1 Vp-pVideo Input Return Loss: ................................................... +26 dB min, reference to 75 Ω

1.4.5 Analog Radio PerformanceSignal to Noise: ..........................................................Meets or exceeds RS-250C; 67 dBSignal to Hum: ................................................................................................... 60 dB minSignal to Discrete Tones: .................................................................................. 65 dB minDifferential Gain: ................................................................................................... 1% maxDifferential Phase: ............................................................................................. ±0.2˚ maxNote: One-hop, 525 or 625 line video per CCIR; -40 dBm receiver carrier level; excludes modem.

1.4.6 Digital Specifications (Optional QM2 Modem)Digital Video ChannelData Rate: .............................................................. 19.39 Mbps (ATSC transport stream)Interface:..........................................................................................SMPTE 310M, typical

SpecificationsSystem Overview


Wayside Data ChannelData Rate (DS1): .............................................................................................1.544 Mbps Interface:...................................................................................................................G.703Asynchronous Service ChannelData Rate: ............................................................................................................9.6 kbpsInterface:................................................................................................................ RS-232Modulation: ........................................................................................................... 16 QAMFEC: .................................................Reed-Solomon (204/188) and depth 12 interleaving

1.4.7 ElectricalPower ConsumptionTransmitter, unprotected terminal:............................................................ 75 Watts typicalReceiver, unprotected terminal:................................................................ 55 Watts typicalPower Supply Voltages: ................................................................................ 110/240 Vac

24/48 Vdc

1.4.8 EnvironmentOperating Temperature Range:.......................................................................0° to +50°CRelative Humidity:.....................................................................0 to 95%, non condensingPhysicalHeight: ................................................................................ 3 rack units: 5.25" (13.34 cm)Depth: ........................................................................................................15.0" (38.1 cm)Weight: .........................................................................................................22 lbs (10 kg)

1.4.9 InterconnectionRF Connections.................................................................................................................1.71 to 4.90 GHz: ....................................................................Type “N” female connector5.925 to 7.125 GHz: .................................................................................... Type WR137;

CPR @ top of rack7.10 to 8.50 GHz: ......................................................... Type WR112; CPR @ top of rack10.70 to 13.25 GHz ........................................................................................ Type WR7514.4 to 15.35 GHz: ......................................................................................... Type WR62IF/Baseband Connectors:...........................................................................................BNCPower, Audio & Alarm Connections: ....................................Barrier strip, screw terminalsNetwork Management Control:.............................................................. 9-pin D connector

Specifications System Overview

1-9

1


1.4.10 DIGITAL Specifications Summary................................................... TX (Note 1) RX (Note 2,3).................................. Frequency Output Noise BER3 System.........................................Range Power1 Figure2 (10-6) Gain2Model ................................(GHz) (dBm) (dB) (dBm) (dB)DAR 2 ......................... 1.7 to 2.7 +31 2.5 -82 113DAR 4 ......................... 3.3 to 4.9 +28 3.5 -82 109DAR 6 ......................... 5.9 to 7.1 +28 3.5 -81 109DAR 6HP .................... 5.9 to 7.1 +31 3.5 -81 112DAR 7 ......................... 7.1 to 8.5 +24 3.5 -81 105DAR 7HP .................... 7.1 to 8.5 +27 3.5 -81 108DAR 12 ................... 10.5 to 13.2 +24 4.0 -80 104DAR 12HP ............. 10.5 to 13.2 +27 4.0 -80 107

1.4.11 Analog Specifications Summary ................................................... ...........TX RX RX......................Typical Frequency.....Output Noise Thresh- System Signal/.........................................Range... Power1 Figure2 hold4 Gain2 Noise4Model ................................(GHz)......(dBm) (dB) (dBm) (dB) (dBm)DAR 2 ......................... 1.7 to 2.7......... +37 2.5 -86 123 -75DAR 4 ......................... 3.3 to 4.9......... +33 3.5 -85 118 -73DAR 6 ......................... 5.9 to 7.1......... +33 3.5 -85 118 -73DAR 6HP .................... 5.9 to 7.1......... +37 3.5 -85 122 -73DAR 7 ......................... 7.1 to 8.5......... +30 3.5 -85 115 -73DAR 7HP .................... 7.1 to 8.5......... +34 3.5 -85 119 -70DAR 12 ................... 10.5 to 13.2......... +30 4.0 -84 114 -70DAR 12HP .............. 10.5 to 13.2......... +33 4.0 -84 117 -70DAR 15 ................. 14.4 to 15.35......... +30 4.0 -84 114 -70

Notes:“HP” suffix indicates high power option.1. Minimum power to branching network. Digital operation assumes 3 dB back-off QPSK, 6dB @ 16QAM2. Does not include branching, filter , or RF connection losses at rear of chassis.3. For 45 Mbps at 16 QAM.4. For one-hop, NTSC video; EIA/CCIR weighting.5. Contact MRC for Variable Rate Modem applications. Bit rate and bandwidth dependent on application.

SpecificationsSystem Overview


2-1DAR Plus Operator’s Guide

2Section

400468-1 Rev. C

2 System Installation

This section explains how to install the DAR PLus radio. The following topics are covered:• Unpacking and Handling• Installation Prerequisites• Rack Installation

2.1 Unpacking and Handling

Each unit is shipped assembled, wired, and factory tested. Each unit is packaged in appropriate shipping containers. Care should be taken when removing equipment from the container to prevent damage to the unit. Check that all parts and accessories are removed from the container and packing material before they are discarded. Verify that the equipment items shipped agree with those listed on the sales order.

Note: DO NOT discard the container or any packing material until the mechanical inspection has been satisfactorily completed. This material must be available in the event that a damage claim needs to be filed with the shipping carrier.

2.1.1 Inspection

Inspect the equipment for any shipping damage. Check that the equipment is clean and that no cables or connectors are broken, damaged, or loose.

Note: At the time of inspection, DO NOT make any adjustments to internal controls or adjustments. The equipment has been factory adjusted for proper operation prior to shipment.

2.1.2 Damage in Shipment

Should any damage be discovered after unpacking the unit, use the following procedure:

1. Immediately file a claim with the shipping carrier.

2. Forward a copy of the damage report to MRC.

3. Contact Customer Service at which time they will determine the disposition of the equipment.

For Customer Service information, see the Preface section of this manual.

Installation PrerequisitesSystem Installation

2-2 DAR Plus Operator’s Guide 400468-1 Rev. C

2.2 Installation Prerequisites

Complying with installation prerequisites prevents problems from arising during installation or future maintenance of the unit. Use the following guidelines:

1. Where possible, provide easy access to the front and rear of the equipment rack (Figure 2-1).

- Allow a minimum of 18 inches [45.72 mm] clearance at the rear of the equipment rack.

- To service and maintain the equipment, allow a minimum of 36 inches of clearance in front of the equipment rack.

Warning: Reduced Air Flow – Installation of the equipment in a rack should be such that the amount of air flow required for safe operation of the equipment is not compromised.

Figure 2-1 Rack Clearances – Top View

TW_SP

REAR

STANDARD19" RACK

DAR PlusRADIO

FRONT

18"CLEARANCE

36"CLEARANCE

Installation Prerequisites System Installation

2-3

2


2. Avoid direct heat to the unit. If unavoidable, use deflector plates or install the unit in a climate controlled environment.

Warning: Elevated operating ambient temperature – If installed in a closed or multi-unit rack assembly, the operating ambient temperature of the rack may be greater than the room ambient temperature. Therefore, considerations should be given to the Template Multiple Rack Assembly (TMRA).

3. Locate the equipment to allow for an adequate number of AC power outlets for test equipment and power tools.

Warning: Circuit Overloading – Consideration should be given to the connection of the equipment to the supply circuit and the effect that overloading of circuits could have on over current protection and supply wiring. Appropriate consideration of equipment nameplate ratings should be used when addressing this concern.

4. Check that the rack mounting rails are sufficiently rigid to support the rack and equipment.

Warning: Mechanical Overloading – Mounting of equipment in a rack should be such that a hazardous condition is not achieved due to uneven loading.

5. Eliminate any conditions that could cause water to drip onto the equipment and penetrate waveguide or cable openings.

2.2.1 Grounding the Equipment Rack

The equipment rack must be connected to the station ground using a #6 copper wire or equivalent. The ground wire should be routed in as straight and direct a route as is practical.

Caution: Grounding the equipment rack is mandatory.

Rack InstallationSystem Installation


2.3 Rack Installation

The DAR PLus mounts within a standard 19 inch equipment rack. The unit occupies a height 3 rack units (3RU). The DAR PLus attaches to the equipment rack using four 12–24 mounting screws. See Figure 2-2 for the correct mounting hole locations.

Figure 2-2 Rack Installation

For detailed information on assembling and installing a standard equipment rack, see Section 2.4, Equipment Rack Installation on page 2-4.

2.4 Equipment Rack Installation

Step 1 Remove the top and sides of the shipping container and packaging material, free the rack from the pallet by removing the nuts and bolts securing it in place. Refer to Table 2-1 for equipment rack specifications.

Table 2-1 Equipment Rack Specifications

Step 2 Remove the rack from its crate by lifting it off the mounting bolts and place it near its final mounting location. After the rack has been raised to a vertical position, remove the shipping support brackets the rack side rails.

Step 3 A template can be used for marking the floor location drilling holes for anchoring the hardware (Figure 2-3). However, if the rack is available when these holes are drilled, it is recommended that the rack base itself be used as a template.

Component Description

Finish Black baked enamel

Uprights Channel 3.0” (76.20 mm) deep x 1.4” (34.825 mm) wide x 0.25” (6.35 mm) thick.

Base Angles 4.0” (100.016 mm) high x 6.5” (162.40 mm) deep x 0.38” (9.50 mm) thick.

Top 1” (25.40 mm) high x 0.38” (9.50 mm) thick.

TW_RACK

MOUNTING SCREWS

DAR Plus

Equipment Rack Installation System Installation

2-5

2


Figure 2-3 Equipment Rack Template

Step 4 Hole size is determined by the type of anchor to be used. On concrete floors, use the following hardware:

- Bolts: 3/8”, 16 x 2.- Washers: 3/8”, Lock and flat (1 each per bolt).- Anchors: 3/8” 16 x 2.- Caulking Anchors:, “Diamond” type 03060,

Note: These anchors require 3/4” holes. On wood floors, use 3/8” x 1 - 1/2” lag bolts with lock and flat washers.

Step 5 Secure the rack to the adjacent racks and existing superstructure where applicable. Fasten the rack’s top braces to the superstructure using J-bolts.

If there is not an existing superstructure, the top of the rack should be braced to a ceiling or wall.

1.25"

2.125"

3.00"

6.00"

12.00"

20.25"

21.00"

RACK_TEM

Equipment Rack InstallationSystem Installation


Figure 2-4 Equipment Rack – Front View

RACK_FR

84.00"

MOUNTINGHOLES

Initial Power-up Procedure System Installation

2-7

2


2.5 Initial Power-up Procedure

The following procedure provides instructions for initially applying power to the radio. Before proceeding, verify the following:

Step 1 Is the other end of the communications link operational?

Step 2 Is prime power available and correct?

Step 3 Have all electrical interface connections been made?

Step 4 Are signal sources operational and correct?

2.6 Power Requirements and Fuse Specifications

2.6.1 Fuse Specifications

Use the following fuse type:• 120/240 Volts• 50-60 Hz• TA 250 Volts

Caution: The DAR Plus radios use either double or neutral fusing depending on the model. Use care when interchanging fuses between DAR Plus radios. Use Table 2-2 to determine the correct fuse.

Table 2-2 describes the fuse specifications and power specifications. The amount of current drawn by the radio depending the model and installed options.Table 2-2 DAR PLus Fuse Specifications

Fuse Type Radio Model Current Amperage Volts

DAR Plus Transmitter 1.5 Amps 3.15 Amps 120/240VACDAR Plus Receiver .8 Amps 2.0 Amps

Legend:HP= High Power

Power Requirements and Fuse SpecificationsSystem Installation


3-1DAR PLus Operator’s Guide

3Section

400468-1 Rev. C SW Release 1.0

3 Operating Controls

3.1 OverviewBoth the DAR Plus transmitter and receiver use a common front panel, LCD display, and keypad. The keypad is used to navigate through menus to make changes to system functions. The LCD display dynamically reports current system functions and errors messages.3.1.1 Common Keypad FunctionsFigure 3-1 shows the common keypad functions for selecting menus.Figure 3-1 Keypad Functions

Note: If no keys have been pressed within 3 minutes, the LCD back light turns off and returns to the Main Menu. Pressing any key re-lights the LCD display.

MAIN

RESET

RADIO

POWER

CONTRAST

DIGITAL

ANALOG

ADJUSTMENT

CHANNELMENU

CHANNELMENU

SUPPLY

(ACTIVE WHEN USING POWER SUPPLY, ANALOG CHANNEL, OR DIGITAL CHANNEL

MENU

MENU

MENU

Transmitter MenusOperating Controls

3-2 DAR PLus Operator’s Guide 400468-1 Rev. C Rev. C SW Release 1.0

3.2 Transmitter MenusFigure 3-2 show the menu system for the DAR Plus Transmitter. Figure 3-2 Transmitter Menu Diagram

STARTUPMENU

CHOOSE

POWER

TX

TX LEARN

RX or TX

POWERSETUP

MAIN MENU

SUPPLY

RADIOMENU

DIGITALMENU

ANALOGMENU

ANALOGPOWERSETUP

DIGITAL

Set the Digital Power Output(Figure 5-12 on page 5-11)

Choose Transmitter (TX) orReceiver (RX) Configuration(Figure 5-10 on page 5-9)

Press Main Menu to enter the Configuration menus.(Figure 5-9 on page 5-9)

Set Internal or External Modulator(Figure 5-11 on page 5-10)

Displays IF Level, Data Synchronization, Oscillator Status, Bit Error Rate, T1 Status(Figure 3-7 on page 3-7)

Displays status for Sub-Carrier IF and IF Squelch(Figure 3-6 on page 3-6)

Displays current, minimum, and maximum power output power, Phase Lock Loop status, and Threshold.(Figure 3-5 on page 3-5)

Displays current power level with minimum and maximum parameters(Figure 3-4 on page 3-4)

Set the Analog Power Output(Figure 5-13 on page 5-12)

Note:To reconfigure the transmitter as analog for digital, see (Section 5, System Configurations on page 5-1)

Transmitter Menus Operating Controls

3-3

3

DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0

3.2.1 Transmitter Main MenuThe Transmitter Main Menu displays the following information:

• Digital or analog output power depending how the radio is configured.• Software Version • Alarm Window - Up to 4 alarms messages can be displayed within the Alarm

Window. If more than 4 messages are displayed, the messages will scroll within the Alarm Window with the message at the bottom of the stack moved to the top of the window.

• Navigation to the following menus:

PWR - Tx Power Supply Menu, Figure 3 - 4 on page 3-4RAD - Transmitter Radio Menu, Figure 3 - 5 on page 3-5ANL - Transmitter Analog Mode Alarm States Menu, Figure 3 - 6 on page 3-6DIG - Transmitter Digital Alarm State Status Menu, Figure 3 - 7 on page 3-7

Figure 3-3 Transmitter Main Menu

DAR Plus TXD-TXPWR 34 dBm

PWR Version 1.0 DIG

RAD ANL

ALARM WINDOW

Tx Power Supply Menu, Figure 3 - 4 on page 3-4

Transmitter Radio Menu, Figure 3 - 5 on page 3-5

Transmitter Analog Mode Alarm States Menu, Figure 3 - 6 on page 3-6

Transmitter Digital Alarm State Status Menu, Figure 3 - 7 on page 3-7

POWER OUTPUTfor

ANALOG or DIGITAL



3.2.2 Transmitter Power Supply MenuThe Transmitter Power Supply Menu displays the following information:

• +5VVdc current, minimum, and maximum readings.• +15 Vdc current, minimum, and maximum readings.• –15Vdc current, minimum, and maximum readings.• Analog or digital power amplifier current, minimum, and maximum readings,

depending on radio configuration.

Figure 3-4 Tx Power Supply Menu

POWER SUPPLIESCURR. MIN MAX

+15 +14.8 +13.9 +15.3–15 –15.0 –14.9 –15.3+5 +4.98 +4.98 +5.04

RST

CURRENT VOLTAGE READINGMINIMUM VOLTAGEPARAMETER

MAXIMUM VOLTAGEPARAMETER

D TXP +12.0 +12.0 +12.0

POWER AMP VOLTAGE“D“- Digital Mode“A“- Analog Mode


3-5

3


3.2.3 Transmitter Radio MenuThe Transmitter Radio Menu displays the following information:

• D/A THS - Digital (D) or Analog (A) transmitter threshold at which an RF alarm and summary alarm reported. The threshold is the trip point at which an RF and Summary Alarm is reported.

• D/A PLL - Digital (D) or Analog (A) transmitter oscillator phase lock loop in locked (LCK) or unlocked (UNLCK) states. The UNLCK state reports a summary alarm.

• Current, minimum, and maximum output power for both digital or analog mode.

Figure 3-5 Transmitter Radio Menu

RADIOD THS 19dBmD PLL LCK

PWR CURR. MIN. MAX.D 27dBm 26dBm 27dBm

RST

THRESHOLDDIGITAL/ANALOG

OSCILLATORPHASE LOCK LOOPDIGITAL or ANALOG

LCK (Normal)or

UNLCK (Alarm)

RESETMIN / MAX DIGITAL or ANALOG

OUTPUT POWERCURR. - CurrentMIN. - MinimumMAX. - Maximum

ANALOG or DIGITAL



3.2.4 Transmitter Analog MenuThe Transmitter Analog Channel Menu displays the following analog status:

• FMT PLL (Modulator Phase Lock Loop) - LOCKED or UNLOCKED states.• SUB CARRIER (Sub-Carrier) - OK or LOST states. OK is normal and LOST

reports an alarm condition.• CARRIER INS (Carrier Insert) displaying OK or LOST states. OK is normal and

LOST reports an alarm condition.

Figure 3-6 Transmitter Analog Mode Alarm States Menu

ANALOG MODEFMT PLL LOCKEDSUB CARRIER OKCARRIER INS OK

PHASE LOCK LOOPLOCKED

OK (Normal)or

LOST (Alarm)

OKor

LOST (Alarm)

UNLOCKED (Alarm)


3-7

3


3.2.5 Transmitter Digital MenuThe Transmitter Digital Menu displays the following information about the alarm states:Internal QM2 Modem:

• A1S (All 1s Inserted) - OK or “1sInserted”• LEVEL - OK• PLL (Phase Lock Loop) - “LOCKED” or “UNLOCKED”• LOS (Loss of Signal) - Input “OK” or “FAULTS”• T1/A1s (T1/All 1s Inserted) - “All 1s Inserted” or “OK”• T1/LOS (T1/Loss of Signal) - “OK” or “FAULTS”

External Modem:• Modem Sum – “INACTIVE” or “ACTIVE”

Figure 3-7 Transmitter Digital Alarm State Status Menu

MODEM STATUSA1S OKLEVEL OKPLL LOCKEDLOS INPUT OKT1/A1S OKT1/LOS OK

LOSS OF SIGNAL

UNLOCKEDLOCKED

PHASE LOCK LOOP

T1 - ALL 1s INSERTED

ALL 1s INSERTED

OK

OKT1 - LOSS OF SIGNAL OK

OK

LEVELOK

orFAULTS

orFAULTS

or FAULTS

INTERNAL QM2 STATUS

MODEM STATUSMODEM SUM INACTIVE

INTERNAL MODEM STATUS

MODEM SUMINACTIVE (Normal)ACTIVE (Alarm)

Receiver MenusOperating Controls


3.3 Receiver MenusFigure 3-8 shows the menu system for the DAR Plus Receiver. Figure 3-8 Receiver Menu System

STARTUPMENU

CHOOSE

RX

RX LEARN

RX or TX

DIGITAL

MAIN MENU

RADIOMENU

DIGITAL

ANALOGMENU

THRESHOLD

RX LEARNTHRESHOLD

ANALOG

RX LEARNDIGITAL

RSL

RX LEARNANALOG

RSL

POWERSUPPLY MENU

Set the Digital Threshold and Modem Type (Internal or External(Figure 5-4 on page 5-4)

Set the Digital Receive Signal Level.(Figure 5-5 on page 5-5)

Set the Analog Threshold and Modem Type (Internal or External)(Figure 5-6 on page 5-6)

Displays Internal or External Modem Status(Figure 3-13 on page 3-13)

Choose Transmitter (TX) orReceiver (RX) Configuration(Figure 5-3 on page 5-3)

Press Main Menu to enter the Configuration menus.(Figure 5-2 on page 5-3)

Displays Analog Status (Figure 3-12 on page 3-12)

Displays Receive Signal Level (RSL) and Fade Margin for both analog and digital channels. Displays oscillator status for analog or digital channels.(Figure 3-11 on page 3-11)

Displays current power level with minimum and maximum parameters(Figure 3-10 on page 3-10)

Set the Analog Receive Signal Level.(Figure 5-7 on page 5-7)

Note:To reconfigure the receiver as analog for digital, see (Section 5, System Configurations on page 5-1)

Receiver Menus Operating Controls

3-9

3


3.3.1 Receiver Main MenuThe Receiver Main Menu provides the following commands and display features:

• Signal Level (RSL) and fade margin for both analog and digital channels • Software Version• Alarm Window - Up to 4 alarms messages can be displayed within the Alarm

Window. If more than 4 messages are displayed, the messages will scroll within the Alarm Window with the message at the bottom of the stack moved to the top of the window.

• Navigation to the following menus:

PWR - Receiver Power Supply Menu, Figure 3 - 10 on page 3-10RAD - Receiver Radio Menu, Figure 3 - 11 on page 3-11A - Receiver Analog Channel Menu, Figure 3 - 12 on page 3-12D - Receiver Digital Alarm State Status Menu, Figure 3 - 13 on page 3-13

Figure 3-9 Receiver Main Menu

DAR Plus RXD-RSL/MARG –69 dBm/+13dB

PWR Version 1.0 D

RAD A

ALARM WINDOWFor summary alarms, see

Section 4, Summary Alarms on page 4-1.

Receiver Power Supply Menu, Figure 3 - 10 on page 3-10

Receiver Digital Alarm State Status Menu, Figure 3 - 13

Receiver Analog Channel Menu, Figure 3 - 12 on page 3-12

Receiver Radio Menu, Figure 3 - 11 on page 3-11

ANALOG or DIGITAL



3.3.2 Receiver Power Supply MenuThe Receiver Power Supply Menu provides the following commands and display features:

• +15 Vdc, –15Vdc, or +5Vdc minimum and maximum readings.• +15 Vdc, –15Vdc, or +5Vdc current voltage readings. Note that voltage readings

that are out of the minimum and maximum ranges, are displayed in reverse video.• Press RST to reset the minimum and maximum readings.

Figure 3-10 Receiver Power Supply Menu

POWER SUPPLIESCURR. MIN MAX

+15 +14.8 +13.9 +15.3–15 –15.0 –14.9 –15.3+5 +6.98 +4.98 +5.04

RST

CURRENT MINIMUM VOLTAGE

MAXIMUM VOLTAGEVOLTAGE READING

The RESET key resets the MIN. (minimum) and MAX. (Maximum) readings to the current values being displayed.


3-11

3


3.3.3 Receiver Radio MenuThe Receiver Radio Menu provides the following commands and display features:

• Current, Minimum, and Maximum readings for both analog or digital Fade Margin. Note that readings that are out of the minimum and maximum ranges, are displayed in reverse video.

• Current, Minimum, and Maximum readings for both analog or digital Receive Signal Level (RSL). Note that readings that are out of the minimum and maximum ranges, are displayed in reverse video.

• Analog or digital oscillator Phase Lock Loop (PLL) status showing Locked (LCK) or Unlocked (UNLCK) states. Note the Unlocked state display a summary alarm on the Front Panel. See Section 3.3.1, Receiver Main Menu on page 3-9 and Section 4, Summary Alarms on page 4-1.

Figure 3-11 Receiver Radio Menu

RADIOD PLL LCK/LCK

CURR. MIN. MAX.D RSL -92dBm -93dBm -92dBmD MAR -32dBm -33dBm -32dBm

RST

RESETCurrent (CURR.)

Lock or Unlock

Analog (A) or Digital (D) Receive Carrier Level (RCL)

The RESET key resets the MIN. (minimum) and MAX. (Maximum) readings to the current value being displayed.

Minimum (MIN.)Maximum (MAX.)

LCK UNLCK

Active Readings

and Fade Margin

Lock or UnlockLCK UNLCK

MIN / MAX

Digital Phase Lock Loop State Analog Phase Lock Loop State

“D” - Digital“A” - Analog



3.3.4 Receiver Analog Channel MenuThe Receiver Analog Menu displays the following information about the analog signals:

• Sub-carrier – displays as “OK” or “UNLOCK” states• IF Squelch – displays as “FORCED” or “OFF” states• PILOT - OK

Figure 3-12 Receiver Analog Channel Menu

ANALOG MODESUB CARRIER OKIF SQUELCH FORCEDPILOT OK

Sub-Carrier State

IF SquelchFORCED and OFF

OKor UNLOCK


3-13

3


3.3.5 Receiver Digital MenuThe Receiver Digital Menu displays the following information about the digital signal: Internal Modem

• IF LEVEL – External IF input OK or modem IF low (mdm if LOW). Note that message in lower case indicates no summary alarm activation on front panel.

• SYNCS - Data Synchronization OK or lost synchronization (LOST SYNCS).• PLL - Phase Lock Loop in locked (LOCKED) or unlocked (UNLOCKED) states.• BER - Bit Error Rate OK or >10 -3. This condition reports a summary on the front

panel.• RXT1 – Receiver T1 Wayside Channel - OK or “no T1”

External Modem• ACTIVE or INACTIVE

Figure 3-13 Receiver Digital Alarm State Status Menu

MODEM STATUSIF LEVEL mdm if LOWSYNCS LOST SYNCSPLL LOCKEDBER NO ERRORSRXT1 no t1

T1 Wayside ChannelBIT ERROR RATENO ERRORS

PHASE LOCK LOOP LOCKEDUNLOCKED

DATA

OK

MODEM IF

modem IF LOW LOST SYNCSor

OKor

or>10-3

OKor

no T1

SYNCHRONIZATION

INTERNAL ALARM STATES

MODEM STATUSMODEM SUM INACTIVE

EXTERNAL ALARM STATES

MODEM SUMINACTIVE (Normal)ACTIVE (Alarm)



4-1DAR Plus Operator’s Guide

4Section

400468-1 Rev. C

4 Summary Alarms

4.1 OverviewBoth the DAR Plus transmitter and receiver use a control Module to gather diagnostic information from the Analog RF Shelf, the digital RF shelf, the power supply, and several plug-in modules. The Control Module is mounted to the hinged front panel and connects to the backplane using a ribbon cable. The backplane acts as a connection interface to route alarm information to the Control Module.Figure 4-1 shows how diagnostic information is routed to the Control Module from the various system components.Figure 4-1 DAR Plus Diagnostic Interconnection

AUDIOBOARD

VIDEOBOARD

MODULATOR orDEMODULATOR

I/OALARMS

30 PIN RIBBON CABLE

BACKPLANE

PLUG-IN MODULES

FRONT PANELand

DOORASSEMBLY

CONTROLMODULE

DISP_BD

DIGITALRF SHELF

ANALOGRF SHELF

POWERSUPPLY

CABINET ASSEMBLY

ACCOOLING

FAN

LCDDISPLAY

KEYPAD

Alarm IndicatorsSummary Alarms


4.2 Alarm IndicatorsThe front panel microcontroller module and display monitors radio functions and reports alarms and warnings as they occur. Alarms are reported in 2 ways:

• Front panel LEDS report alarm conditions for both the analog or digital RF shelves. See Section 4.2.1, LED Definitions.

• Alarm messages are displayed on the front panel LCD within the Alarm Window. Up to 4 alarm messages can be displayed at one time. If 4 or more alarms messages need to be displayed at one time, all messages scroll in order as they occur within the Alarm Message Window. (See Figure 4-2)In addition, when a reading exceeds or drops outside of the system specification, the report menu hi-light the reading as shown in Figure 4-2.

Figure 4-2 Receiver Main Screen with Alarm Window

4.2.1 LED DefinitionsThree LEDs are located on the front panel as shown in Figure 4-3.

• The PWR LED, colored green, indicates that power is applied to the unit. • The DIGITAL LED, colored amber, indicates an alarm in the digital RF section.• The ANALOG LED, colored amber, indicates an alarm in the analog RF section.

Figure 4-3 DAR Plus Front Panel Display and Keypad

DAR Plus RXD–RSL/MARG –50 dBm/+13dB

PWR PWR +15 FLT DIGPWR –15V FLT

RAD PWR +5V FLT ANL

ALARM MESSAGE WINDOW

HI-LITED BOXFOR OUT OF SPECIFICATIONREADING

(Screen blank if no faults)

POWER LED (GREEN)

SUMMARY ALARM (YELLOW)

Transmitter Summary Alarms Summary Alarms

4-3

4


4.3 Transmitter Summary AlarmsThis section describes the summary alarms for the transmitter, power supply, analog RF shelf, and digital RF shelf. Alarms are classified in two categories:

• GENERAL - General alarms warn of a system module which is operating out of specification but does not interrupt the radio service.

• CRITICAL - Critical alarms cause the system to shut down certain system components which may be damaged if they had continued to operate. For example, a power supply operating out specification will cause the Control Module to shut down the power amplifiers in both the analog and digital RF shelves.

4.3.1 Transmitter Power Supply Alarms

Table 4-1 lists power supply alarms which affect both the analog and digital sections of the radio. Note that a power supply alarm disables the power amplifiers.

Table 4-1 Transmitter Power Supply Alarms

4.3.2 Transmitter Digital RF Shelf Alarms

Table 4-2 lists alarms that affect the digital RF shelf.

Table 4-2 Transmitter Digital RF Shelf Alarms

Alarm Message

AnalogLED

Illuminate?

Digital LED

Illuminate?System Action Possible Cause

PWR +15 FLT Disables both Digital and Analog Power Amps

+15 Volts outside operating parameters. Source: Power Supply

PWR –15V FLT Disables both Digital and Analog Power Amps

–15 Volts outside operating parameters. Source: Power Supply

PWR +5V FLT Disables both Digital and Analog Power Amps

+5 Volts outside operating parameters. Source: Power Supply

Alarm Message

Analog \LED

Illuminated?

Digital LED

Illuminated?System Action Possible Cause

DG PLL UNLOK Disables Digital Power Amp

Digital Local Oscillator PLL Loss of lock detectSource: Digital Local Oscillator)

PWR DG +12V FLT None

+12 Volts Digital Power Amp supply out of Speck (Source Digital Power Amp)

DG TX PWR ALRM None

Digital Power Amplifier output power is low. (Source Digital Power Amp)

DG MODEM SUM None

Digital Modem Summary Alarm (External Modem from Backplane)

Transmitter Summary AlarmsSummary Alarms


4.3.3 Transmitter Analog RF Shelf Alarms

Table 4-3 lists alarms that affect the analog RF shelf.

Table 4-3 Transmitter Analog RF Shelf Alarms

Alarm Message

Analog LED

Illuminated?

Digital LED

Illuminated?System Action Possible Cause

AN PLL UNLOK Disables Analog Power Amp

Analog Local Oscillator PLL Loss of lock detect* Source: Analog Local Oscillator

PWR AN +12V FLT None

+12 Volts Analog Power Amp supply operating outside parameters. Source: Analog Power Amp

AN TX PWR ALRM None

Analog Power Amplifier output power is low. Source: Power Amp

AN CARR INS ON None

Analog Carrier Insert Failure Source: Limiter)

AN SUBARR FLT None

Analog Sub-Carrier AlarmSource: Audio Sub-Carrier Board(s))

AN FM TX LOK None

Analog Loss of FM Transmit Format lock Source: 70MHz Modulator)

Receiver Alarms Summary Alarms

4-5

4


4.4 Receiver Alarms

4.4.1 Receiver Power Supply Alarms

Table 4-4 lists alarms that affect the power supply.

Table 4-4 Rx General Power Supply Alarms

4.4.2 Receiver Digital RF Shelf Alarms

Table 4-5 lists alarms that affect the digital RF shelf.

Table 4-5 Receiver Digital RF Shelf Alarms

Alarm MessageAnalog

LED Illuminated?

Digital LED

Illuminated?System Action

Possible Cause

PWR +15 FLT None +15 Volts outside operating parameters.Source: Power Supply

PWR –15V FLT None –15 Volts outside operating parameters.Source: Power Supply

PWR +5V FLT None +5 Volts outside operating parameters. Source: Power Supply

Alarm Message

AnalogLED

Illuminated?

Digital LED

Illuminated?System Action

Possible Cause

DG PLL UNLOK None Digital Local Oscillator PLL Loss of lock detect Source: Digital Local Oscillator)

DG RSL ALRM None Digital Receive Signal Level is below Fade Margin. Source: IF Amplifier)

DG MODEM SUM None Digital Modem Summary Alarm.Source: External Modem from Backplane)

Alarm & Connection ReferencingSummary Alarms


4.4.3 Receiver Analog RF Shelf Alarms

Table 4-6 lists alarms that affect the analog RF shelf.

Table 4-6 Receiver Analog RF Shelf Alarms

4.5 Alarm & Connection ReferencingWhen troubleshooting alarm faults, refer to the following sections in order isolate problems within the transmitter or receiver.

• Section 4.5.1, DAR Plus Transmitter Alarm Reference on page 4-7• Section Table 4-7, DAR Plus Transmitter Alarm Reference Table on page 4-7

Alarm Message

AnalogLED

Illuminated?

Digital LED

Illuminated?

System Action Possible Cause

AN PLL UNLOK None Analog Local Oscillator PLL Loss of lock detect Source: Analog Local Oscillator

AN RSL ALRM None Analog Receive Signal Level is below Fade Margin. Source: IF Amplifier

AN SQLCH ALRM None Analog Squelch AlarmSource: IF Amplifier)

AN SUBARR FLT None Analog Sub-Carrier Alarm Source: Audio Sub-Carrier Board(s)

Alarm & Connection Referencing Summary Alarms

4-7

4


4.5.1 DAR Plus Transmitter Alarm Reference

Use Table 4-7 to reference alarm messages to the alarm connector as shown in Table A-4 on page A-4.

Table 4-7 DAR Plus Transmitter Alarm Reference Table

FIRM WARE 1.0 TRANSMITTER (TX)Pin# PIN

DESCRIPTIONDISPLAY

DESCRIPTIONSALARM STATES

GENERAL NORMAL ALARM

1 GND2 +15V ±7.5%3 NC14 –15V ±7.5%15 +5V ± 5%SUMMARY FUNCTIONS

4 SUM_ALRM_A na DAR PLUS16 SUM_ALRM_D SUMMARY ALARM

(Analog or Digital)LED OFF LED ON

ANALOG FUNCTIONS [A]5 FMT_LOK FMT PLL LOCKED UNLOCKED6 IF_ALRM CARRIER INS OK LOST17 SC_ALRM SUB CARRIER LOCKED UNLOCKED11

(Internal Modem)

PILOT ANALOG PILOT OK MISSING

RF FUNCTIONS [RAD]7 IF_LOK NU NU20 MW_LOK (A/D) PLL LCK UNLCKMODEM FUNCTIONS [D]11

(External Modem)

MDMA_1 DIGITAL A1S OK a1s input

23 MDMA_2 (MDM IF)LEVEL OK LEVEL LOW10 MDMA_3 PLL LOCKED UNLOCKED22 MDMA_4 LOS INPUT OK no input9 MDMA_5 T1/A1S OK t1a1s input21 MDMA_6 T1/LOS OK t1 no input8 MDMA_7 na na na11 MDMA_1 DIGITAL EXTERNAL MODEM

QM2, QM4, VRM MODEM SUM

INACTIVEACTIVE

PA VOLTAGES / AGC[RAD]RSL12 PA+12_A na13 PA+12_D PA VOLTS TXP 1218 RFIF_A na19 RFIF_D RSL dBm 5 024 PSON_A*25 PSON_D* 5 0

LEGEND: NU=NOT USEDNORMAL=5V LOGIC HIGHALARM=0V LOGIC LOW*EXCEPTION RXT1

Alarm & Connection ReferencingSummary Alarms


4.5.2 DAR Plus Receiver Alarm Reference

Use Table 4-8 to reference alarm messages to the alarm connector as shown in Table A-4 on page A-4.

Table 4-8 DAR Plus Receiver Alarm Reference Table

FIRM WARE 1.0 RXPin# PIN

DescriptionDISPLAY

DESCRIPTIONSALARM STATES

GENERAL NORMAL ALARM1 GND2 +15V ±7.5%3 NC14 –15V ±7.5%15 +5V ± 5%SUMMARY FUNCTIONS4 SUM_ALRM_A16 SUM_ALRM_D SUMMARY ALARM LED OFF LED ON

ANALOG FUNCTIONS [A] RECEIVER5 FMT_LOK6 IF_ALRM IF SQUELCH OFF FORCED17 SC_ALRM SUBCARRIER OK UNLOCKED (loss)11

(Internal Modem)

PILOT ANALOG PILOT OK MISSING

RF FUNCTIONS [RAD]7 IF_LOK20 MW_LOK (A/D) PLL LCK UNLCKMODEM FUNCTIONS [D]11

(External Modem)

MDMA_1 DIGITAL RXA1S OK a1sin

23 MDMA_2 SYNCS OK LOST SYNCS10 MDMA_3 PLL LOCKED UNLOCKED22 MDMA_4 BER NO ERRORS BER>10^39 MDMA_5 *RXT1 no t1 OK21 MDMA_6 T1PLL OK t1pll lost8 MDMA_7 (MDM) IF LEVEL OK mdm if low11 MDMA_1 DIGITAL EXTERNAL

MODEMMODEM SUM

INACTIVEMODEM SUM

ACTIVEPA VOLTAGES / AGC[RAD]RSL12 PA+12_A13 PA+12_D18 RFIF_A19 RFIF_D24 PSON_A*25 PSON_D*

LEGEND: NU=NOT USEDNORMAL=5V LOGIC HIGHALARM=0V LOGIC LOW*EXCEPTION RXT1

A-1DAR Plus Operator’s Guide

Appendix

400468-1 Rev. C

A

A System Connections

This appendix shows the DAR Plus external connections for the transmitter and receiver.

Figure A-1 Rear Panel Connectors

1

2

3

4

SUMMARY ALARM

AUDIO CHANNELS (1–4)

DATA

SITE MANAGEMENT

ALARM

IF

HDTVDS-1

(Table A-4 on page A-4)




(Table A-3 on page A-3)BASEBANDVIDEO

AC FAN

ANALOG

RF OUTPUT

ACorDC

POWER

(NoConnection)

orDIGITAL

System Connections

A-2 DAR Plus Operator’s Guide 400468-1 Rev. C

Table A-1 Data I/O

Table A-2 Site Management - QM2 Internal Modem

Note: When a QM2 Tx Modem input is grounded, It causes the associated Form C relay to activate.

Pin# Name Description

1 NC

2 NC

3 SVC DATA I/O 9600 Kbps Baud Data Service Channel

4 Pin 6

5 Ground

6 Pin 4

7 Pin 8

8 Pin 7

9 NC

Pin# Tx Input Rx Output Description

1 SM C IN SM _C_NO

2 GND SM_C_COM

3 ––– SM_B_NC

4 SM_A_IN SM_A_NO

5 GND SM_A_COM

6 ––– SM_C_NC

7 SM_B_IN SM_B_NO

8 GND SM_B_COM

9 ––– SM_A_NC

System Connections

A-3

A


Table A-3 Alarm I/O


Description Normal Alarm

1 GND Ground

2 +15 + 15 Vdc

3 NC

4 SUM_ALRM_A

5 FMT_LOK 70 MHz PLL FMT + 5 Vdc 0

6 IF_ALRM

7 IF_LOK (Oscillator) PLL + 5 Vdc 0

8 MDMA_7

9 MDMA_5

10 MDMA_3

11 MDMA_1

12 PA+12_A

13 PA+12_D NU

14 –15V +12Vdc A/D

15 +5V

16 SUM_ALRM_D DAR Plus Analog/Digital Summary

17 SC_ALRM

18 RFIF_A NU

19 RFIF_D AGC V

20 MW_LOK

21 MDMA_6

22 MDMA_4

23 MDMA_2

24 PSON _A*

25 PSON _D* Power Supply Voltage Control Line

Legend:NU = Not UsedA/D = Analog/DigitalPLL = Phase Lock LoopAGC = Automatic Gain ControlFMT = Model name for Transmitter Video ModulatorFor additional alarm referencing, refer to the following reference tables:

• DAR Plus Transmitter Alarm Reference Table, Table 4-7 on page 4-7• DAR Plus Receiver Alarm Reference Table, Table 4-8 on page 4-8

System Connections

A-4 DAR Plus Operator’s Guide 400468-1 Rev. C

Table A-4 Summary Alarm

Table A-5 Audio Channels


1 DIG_SUM_ALRM_COMM

2 DIG_SUM_ALRM_N/C

3 NC

4 ANA_SUM_ALRM_COMM NU

5 ANA_SUM_ALRM_N/C NU

6 DIG_SUM_ALRM_N/O

7 NC

8 NC

9 ANA_SUM_ALRM_N/C NU


Audio Channel #1

1 AF1A 600 ohm 8 dBm I/O

2 GND –

3 AF1B 600 ohm 8 dBm I/O

Audio Channel #2


2 GND –


Audio Channel #3


2 GND –


Audio Channel #4


2 GND –


B-1DAR Plus Operator’s Guide

Appendix

400468-1 Rev. C

B

B Modules

This appendix shows the location of the plug-in and RF modules for both the FLH–DAR transmitter and receiver:

• Section B.1, DAR Plus Transmitter Modules on page B-2• Section B.2, DAR Plus Receiver Modules on page B-3

Also included are individual module adjustments, indicators, and test points. The following modules are included:

• Section B.3, Tx Audio Modulator Motherboard (900426) on page B-4• Section B.4, Audio Subcarrier Generator (900100) on page B-5• Section B.5, Rx Video Demodulator (906556) on page B-6• Section B.6, Rx Audio Motherboard (900414) on page B-7• Section B.7, Rx Audio Subcarrier Demodulator (900172) on page B-8• Section B.8, Rx IF Filter/Equalizer (905560) on page B-9• Section B.9, IF Amp (905764) on page B-10• Section B.10, IF Limiter/Amp (905720) on page B-11

DAR Plus Transmitter ModulesModules

B-2 DAR Plus Operator’s Guide 400468-1 Rev. C

B.1 DAR Plus Transmitter Modules

Figure B-1 Transmitter- Top View (Front Door Open)

OSCILLATOR

BACKPLANE

IF LIMITER AMPPOWER AMP

MICROCONTROLLER

POWER DISTRIBUTION(906572)

(906542)& DISPLAY

POWER SUPPLY(906582)

(906560)

(906570)

(905720)

POWER AMP

(906673)POWER SUPPLY

(906529) QM2MODULATOR(906859)

AUDIOMODULATOR(900426)

VIDEOMODULATOR(906556)

DAR Plus Receiver Modules Modules

B-3

B


B.2 DAR Plus Receiver Modules

Figure B-2 Receiver - Top View (Front Door Open)

BACKPLANE

POWER DISTRIBUTION(906588)

(906542)& DISPLAY

POWER SUPPLY(906582)

(906560)

QM2DEMODULATOR(90)

VIDEODEMODULATOR(906556)

AUDIODEMODULATOR(90)

LNC SPLITTER(906621)

LNC (906512)

OSCILLATOR(906570)

IF FILTER(905560)

IF AMP(906587)

MICROCONTROLLER

Tx Audio Modulator Motherboard (900426)Modules


B.3 Tx Audio Modulator Motherboard (900426)Table B-1 Tx Audio Modulator Motherboard Adjustments (900426)

Figure B-3 Tx Audio Modulator Adjustments (900426)


R31 Channel 1 Audio Deviation Adjust

CR5 Audio 1 Green LED, ON is active







900426

1

15

J5

CHANNEL 4 CHANNEL 3 CHANNEL 2 CHANNEL 1

CH. 1CH. 2CH. 3CH. 4

CH. 1 DEV.CH. 2 DEV.CH. 3 DEV.

CH. 4 DEV.

J5

CR5CR6CR7CR8R31

R41R46

R36

FRONT PANEL VIEW

(900100) (900100) (900100) (900100)

Audio Subcarrier Generator (900100) Modules

B-5

B


B.4 Audio Subcarrier Generator (900100)Table B-2 Audio Subcarrier Generator Adjustments (900100)

Figure B-4 Audio Subcarrier Generator Adjustments (900100)

Component Description (see Figure 5.3)

R24 Subcarrier Output Level Adjust

C17 Peaking Output Level Adjust

L1 Peak for Output Level and Frequency

SW1 On / OFF Switch

C4 Fixed Capacitor for PRE-EMPHASIS

R13, R14 Fixed Resistors for PRE-EMPHASIS

C17

L1

R24

PEAK for OUTPUTLEVEL and FREQUENCY

ON/OFF SWITCH

PEAKING OUTPUTLEVEL ADJUST

900100

SUBCARRIER OUTPUTLEVEL ADJUST

SW1

Rx Video Demodulator (906556)Modules


B.5 Rx Video Demodulator (906556)Table 1-3 Rx Video Demodulator Adjustments (906556)

Note: All other adjustment components are factory set and should not be adjusted.

Figure 1-5 Rx Video Demodulator Adjustments (906556)


R88 Squelch Threshold Adjustment

R54 Baseband Gain Adjustment

R55 Video Gain Adjustment

R78 Discriminator Voltage Testpoint

VIDEO GAIN ADJUSTMENT

BASEBAND GAIN ADJUSTMENT

SQUELCH THRESHOLD ADJUSTMENT

SQUELCH LED (RED = SQUELCHED)

J1

1

15

J1

FRONT PANEL VIEW

906556

R88R54R55R78

R88R54R55R78

SUB-CARRIER ADJUSTMENT

Rx Audio Motherboard (900414) Modules

B-7

B


B.6 Rx Audio Motherboard (900414)Table B-4 Rx Audio Motherboard Adjustments (900414)

Figure B-6 Rx Audio Motherboard Adjustments


R1 Channel 1 Audio Level +8 dBm Adjust

CR5 Audio 1 Green LED, ON Subcarrier is detected







900414

1

15

J5

CHANNEL 4 CHANNEL 3 CHANNEL 2 CHANNEL 1

CH. 1CH. 2CH. 3CH. 4

CH. 1 AUDIO LEVEL ADJUSTCH. 2 AUDIO LEVEL ADJUS.CH. 3 AUDIO LEVEL ADJUSTCH. 4 AUDIO LEVEL ADJUST

J5

CR5CR6CR7CR8R1

R3R4

R2

FRONT PANEL VIEW

(900172)

Rx Audio Subcarrier Demodulator (900172)Modules


B.7 Rx Audio Subcarrier Demodulator (900172)Table B-5 Rx Audio Subcarrier Demodulator (900172)

Figure B-7 Rx Audio Subcarrier Demodulator (900172)


C8 Discriminator Adjust for Distortion

L1 Peak for S.C. Level U1 Pin 13 @ 2.5V Vdc

R21 Notch Filter Q Factor Adjust

C19 Notch Filter Frequency Adjust

R24 Flatness Adjust at 15 kHz

C12 Fixed Capacitor for DE-EMPHASIS

R14 Fixed Resistor for DE-EMPHASIS

R24

C8

L1

C19R21

NOTCH FILTERFREQUENCY ADJUST

FLATNESS ADJUSTAT 15 KHz.

DISCRIMINATOR ADJUSTFOR DISTORTION

PEAK FOR S.C. LEVELAT U1 PIN 13 @ 2.5Vdc.

900172

NOTCH FILTERQ FACTOR ADJUST

Rx IF Filter/Equalizer (905560) Modules

B-9

B


B.8 Rx IF Filter/Equalizer (905560)

Table B-6 Rx IF Filter/Equalizer Adjustments

Table B-7 Jumper Configurations

Figure B-8 Rx IF Filter/Equalizer


L9

L10

C16

Digital Video

E6–E4 E6–E5

E3–E1 E3–E2

E9 – E10 E9 – E10

E13 – E14 E13 – E14

L10

L9

C16

E14 E13

E9E10

E11 E8

E3E1

E2E15

VIDEO

DIG

ITA

L

J2

E4

E5

E6

E16

DIGITAL

VID

IEO

F1

E7E12

+15VGNDOUTPUT INPUT

F2

U2

905550A

J1

IF Amp (905764)Modules


B.9 IF Amp (905764)Table B-8 IF Amp

Note: All adjustments are factory set and should not be adjusted in the field.

Note: Switch S1 is factory set in the AGC position.

Figure B-9 IF Amp (905764)

Component DescriptionS1 Manual/AGC Mode Select Switch (See Note)S2 Video / Digital Mode Select SwitchU1 Stepped Attenuator

J5

R64

J2

J1U1

J4

IF MON

IF IN

J3

TP2

VREF

TP5

GND

AGC

TP4

TP3

VDET

S1

TP1VA2

OFFSET

R109

S2VIDEO

DIGITAL

SQLV

R94

ZERO db

R63

PWR

OUT

OUT

905884A

LOGGAIN

R104

MANUAL AGC

8421

ON

*

IF Limiter/Amp (905720) Modules

B-11

B


B.10 IF Limiter/Amp (905720)Table B-9 IF Limiter Adjustments

Table B-10 IF Limiter Jumper Configurations

Figure B-10 IF Limiter/Amp

Note: Jumpers are set in Analog/Digital position.

Component DescriptionU11 Stepped AttenuatorU10 Stepped Attenuator

Digital AnalogE19 – E20 E21 – E22E9 – E11 E9 – E10E3 – E18 E7 – E8

– E4 – E18

E4E16E18

E3

E15

E17E8E7 E14

E13E12E11

E9E10

E22 E21

U3

+15V

E5

ALARM

E6

U7 U9

K1

U5U11U10

905710A

E1

16

8

4

2

1

8 4 2 1

E20

E19

ON

ON

IF Limiter/Amp (905720)Modules


C-1DAR Plus Operator’s Guide

Appendix

400468-1 Rev. C

C

C Frequency Settings

This appendix shows the DAR PLus synthesizer settings for the 6, 12, and 13 GHz bands. Refer to the following tables for the correct frequency band:

• Table C-1, 6 GHz Oscillator Switch Settings ,on page C-2• Table C-2, 12/13 GHz Oscillator Switch Settings ,on page C-2

Set the correct frequency using S1–S4 as shown in Figure C-1.

Figure C-1 Synthesizer Switch Locations

Frequency Settings

C-2 DAR Plus Operator’s Guide 400468-1 Rev. C

Table C-1 6 GHz Oscillator Switch Settings

Table C-2 12/13 GHz Oscillator Switch Settings

FrequencySwitch Setting

S1 S2 S3 S4

6887.5 6 8 0 16912.5 A E 0 16937.5 E 4 1 16962.5 2 B 1 16987.5 6 1 2 17012.5 A 7 2 17037.5 E D 2 17062.5 2 4 3 17087.5 6 A 3 17112.5 A 0 4 1



S1 S2 S3 S4 S1 S2 S3 S4

12712.5 5 C 8 0 13075 A 9 B 012725 E D 8 0 13087.5 3 B B 0

12737.5 7 F 8 0 13100 C C B 012750 0 1 9 0 13112.5 5 E B 0

12762.5 9 2 9 0 13125 E F B 012775 2 4 9 0 13137.5 7 1 C 0

12787.5 B 5 9 0 13150 0 3 C 012800 4 7 9 0 13162.5 9 4 C 0

12812.5 D 8 9 0 13175 2 6 C 012825 6 A 9 0 13187.5 B 7 C 0

12837.5 F B 9 0 13200 4 9 C 012850 8 D 9 0 13212.5 D A C 0

12862.5 1 F 9 0 13225 6 C C 012875 A 0 A 0 13237.5 F D C 0

12887.5 3 2 A 0 13250 8 F C 012900 C 3 A 0 13262.5 1 1 D 0

12912.5 5 5 A 0 13275 A 2 D 012925 E 6 A 0 13287.5 3 4 D 0

12937.5 7 8 A 0 13300 C 5 D 012950 0 A A 0 13312.5 5 7 D 0

12962.5 9 B A 0 13325 E 8 D 012975 2 D A 0 13337.5 7 A D 0

12987.5 B E A 0 13350 0 C D 013000 4 0 B 0 13362.5 9 D D 0

13012.5 D 1 B 0 13375 2 F D 013025 6 3 B 0 13387.5 B 0 E 0

13037.5 F 4 B 0 13400 4 2 E 013050 8 6 B 0 13412.5 D 3 E 0

13062.5 1 8 B 0 13425 6 5 E 0