Introduction to Signal Paths WSR88D

Objective: Students will have basic understanding of RF,IF, and Test Paths used by the WSR88D RADAR between the Frequency Generator and the Intermediate Frequency Digital Receiver (IFDR). Expectations: In this online environment please keep microphones muted. Instructors will ask if there are any questions during the presentation.

NW

S EHB 6-513

2-18

Figure 2-5. NW

S Single Channel Equipm

ent Shelter Configuration

NW

S EHB 6-513

2-19

Figure 2-6. DoD

RD

A Equipm

ent Shelter Configuration

NW

S EHB 6-513

2-20

Figure 2-7. FAA

Equipment Shelter C

onfiguration (Sheet 1 of 2)

NW

S EHB 6-513

2-21

Figure 2-7. FAA

Equipment Shelter C

onfiguration (Sheet 2 of 2)

NW

S EHB 6-513

2-2

Figure 2-1. Radar D

ata Acquisition G

roup

NWS EHB 6-500

FP-1-5/(FP-1-6 blank)

Figure FO1-3. System Program andOperating Station Interrelationships,

Pictorial Flow Diagram

2-3

2-3

UD4 RECEIVER

UD90A11 RSP

UD90/190A1

SPIP

UD90A10 KVM

UD4A40 RDAIU

UD3 XMTR

AME

UD2A9

RFAMPLIFIER

MODULATOR

CONTROLAND

MONITOR

COOLING

DRIVE MOTORS

AZ – EL ENCODERS

RF PALLET

UD2A5

DIGITAL

RECEIVER

IF – DIGITAL

CONVERSION

7 TRIGGERS & GATES

FAULTSSTATUS

STATUS FAULTS

TRIGGERS CONTROL

TX PWR MON OUTPUT

UD2 PEDESTAL

NWS TRAINING CENTER

SIMPLIFIED BLOCK DIAGRAM

STALO = SITE FREQUENCY - COHO

SITE FREQUENCY = STALO + COHO

CONTROL

WIDEBAND

BASE DATA

GENERATION

ETHERNETINTERFACE

ETHERNET

INTERFACE

STATUS AND

CONTROL

UD90A4

ROUTER

UD90A5LAN SWITCH

HV

H + V RF H + V IF

RF to IFCONVERSION

FOR TRAINING USE ONLY

TO RPG FROM RPG

CONTROLBASE DATA (R,V,W,D)

STATUS & FAULTS

- Modulator Charge

- Trigger Charge

- Mid-PRT

- Post Charge

- RF Drive

- Modulator Discharge

- RF Pulse Start (T0)

SimplifiedBlock_20180417.vsd

STALO

1

2

3

UD4A1RF

GENERATOR

BurstMixer

RCV VIDEO

AME COMMS

POSITION DATA

INTERLOCKS SENSORS

7 TRIGGERS & GATES

RF GATE &CONTROL

STATUS

STATUS & CONTROL

1

RS232 – RS422CONVERSION

STALO

STALO

MOMENT DATA

TIMING

COHO

IF BURST

STATUS

ANTENNA DRIVE

BANDPASS T/R

BANDPASS T/R

LNA

LNA

AME = ANTENNA MOUNTED ELECTRONICS

ANT = ANTENNA PEDESTAL

IFDR = INTERMEDIATE FREQUENCY DIGITAL

RECEIVER

KVM = KEYBOARD, VIDEO, MONITOR

RSP = RADAR SIGNAL PROCESSOR

RCVR = RECEIVER

SPIP = SIGNAL PROCESSOR INTERFACE PANNEL

XMTR = TRANSMITTER

CLUTTERSUPRESSION

UD90A14POWER

AMPLFIER

I&Q DATA H + V IF

4 PORT AZ ROTARY COUPLER

EL ROTARYCOUPLER

HV PULSE

FAULTS

TRIGGERS

HV ON & ANT CMD

TDS 0-2

TX STATUS DATA WORD

HVOFF, RECYCLE & INOP

TIMING CONTROL &

SYNCHRONIZER

ETHERNET INTERFACE

RF GATE

CONTROL

INTERLOCK LOGIC

(PED / XMTR)

PEDESTAL CONTROL

CMD & STATUS

INTERFACE

REDUNDANT CHANNEL

SWITCHING *

OMT

HYBRID

1DC1 1AT4RF BURST

RF DRIVE

(8.32uS, 10mW Pk @ Site Feq.)

BITECal

* Redundant sites only: Includes

RDAIU Switching and WGS 1S1

DISCRETE STATUS DATAUD 4, 10, AND 7

ANALOG STATUS DATAUD1, 2, 4, 7, 10, AND 90

SW TO UTIL/GENGEN START CMD UD10

POWERDIST

FAULTS

2-5

UD90ProcessorCabinet

UD190 Processor Cabinet

AME = ANTENNA MOUNTED ELECTRONICSIFDR = INTERMEDIATE FREQUENCY DIGITAL RECEIVERRSP = RADAR SIGNAL PROCESSORXMTR = TRANSMITTER

UD103

XMTR

AME

UD2A9

RFAMPLIFIER

MODULATOR

DRIVE MOTORS

AZ – EL ENCODERS

RF PALLETUD2A5

DIGITALRECEIVER

IF – DIGITALCONVERSION

UD2 PEDESTAL

OMT

STALO = SITE FREQUENCY - COHOSITE FREQUENCY = STALO + COHO

UD90A4 ROUTER

H V

H + V RF

H + V IF

RF to IF

CONVERSION

FOR TRAINING USE ONLY

NWS Training CenterFAA Redundant Simplified Diagram

FAA_RedundantSimplified_v20180418.vsd

STALO

1

2

3

UD104A1RF GENERATOR

BurstMixer

RCV VIDEO

AME COMMS

INTERLOCKS SENSORS

RF DRIVE

STALO

STALO

TIMING

COHO

IF BURST

CH 1 BAND PASS

T/R

T/R

LNA

LNA

700 KW, 1.5/4.5 uS

H + V IF

4 PORT AZ ROTARY COUPLER

EL ROTARYCOUPLER

HV PULSE

TIMING CONTROL &

SYNCHRONIZER

DIGITALRECEIVER

IF – DIGITALCONVERSION

STALO = SITE FREQUENCY - COHOSITE FREQUENCY = STALO + COHO

UD4A1RF GENERATOR

BurstMixer

RCV VIDEO

STALO

TIMING

COHO

IF BURST

CLOCK

TIMING CONTROL &

SYNCHRONIZER

UD3 XMTR

RFAMPLIFIER

MODULATOR

HV PULSE

RF DRIVE(8.32uS, 10mW Pk @ Site Freq.)

UD90A5LAN SWITCH

UD90A11 RSP

UD90A5LAN SWITCH

UD90A11 RSP

CH 2 BAND PASS

WaveGuide

Switch

CH 1 BAND PASS

CH 2 BAND PASS

WaveGuide

Switch

WaveGuide

Switch

WaveGuide

Switch

Test / Cal

WaveGuide

Switch

Dummy

Load

WaveGuide

Switch

WaveGuide

Switch

Dummy

Load

LongShort

LongShort

H + V IF

UD4A40 RDAIU

To WFO

UD70A4RPG Router

UD90A4 ROUTER

UD70A11LAN SWITCH

UD70A4&5RPG (A&B)

UD170A4RPG RouterUD170A11

LAN SWITCHUD170A4&5RPG (A&B)

UD31 Relay Box

Balancing motor

Horizontal IF

Vertical IF

AME Comms

STALO

CH1 IFDR

CH2 IFDR

CH1 IFDR

CH2 IFDR

CH1 RSP

CH2 RSP

CH1 4A1

CH2 4A1

Mechanical movements w/CH change

Phase/Power Balancing unit/motor(tune balance of output H/V for 50/50)

Bandpass input/output filters(change frequency of input filters)

Ch1/Ch2 TX waveguide switch(change source of RF transmitter)

Standby/Operate waveguide switches(switch in dummy load for calibration

and antenna for operation)

RF switches in RDAIU(change STALO source up to pedestal)

IF switches in RDAIU(IF from pedestal to destination receiver)

Toggle AME Control(select which RSP controls AME)

Comms Relay box relays(select RPG to feed WFO)

UD104 RECEIVER

UD4 RECEIVER

UD104A38 IFDR

UD4A38 IFDR

2-107

IGCT

HV SwitchStack Monitor

Charging

Transformer

Charging Diode

280V

PS

Capacitor Filter

Bank

Charging

Switch

A16K1

Post Charge

Regulator

Focus Coil

Power Supply

Vacuum

Power Supply+3000 VDC <20µA

Focus CoilCurrent Adj.

Arc / VSWR

Detector

Filament

Power Supply

RF Amp Pulse ShaperVariable

Attenuator

Power

TransformerKlystron

Fo

cu

s C

oil

2

FilimentCurrent Adj.

A1R4

A1 R3

A1 R5

A1A2R74

wide

narrow

A10

A15A14

A9

A2

A4A5

A7A1T4 A7T1 A7T3

AT1

PS1

A7T2

A15A6

A15A9A15A1

A8

A1A2

V1

L1

PS8

A6

PS2

A1R2

A1R1

6 Pre-Conditions for Transmitter Available

no faults

no reset

preheat complete

WG SW seated

280v inrush current suppression bypassed

no HV Inhibit

- excesive triggers

- pfn wide/narrow

HVON Command

Trigger Sequence

Mod Charge

Mid PRT

Post Charge

RF Driver (RF Pre Trig)

Mod Discharge

RF Pulse Start

Mod Charge

Mid PRT

Post Charge

RF Driver

(Pre-trigger)

Mod Disharge

RF Pulse Start

Trigger Box

Discharge Trigger(30 +/- 2 us)

RF Pulse Width Select

1:2.7

280VDC

28VDC Enable

8.32µs 10mW

RF pulse from

UD4A1

8.32µs 48Wpk

2Wpk (-1dBmavg) CPI

7.5Wpk (5dBmavg) Litton1.5µs (sp) - 4.5µs (lp)

RF drive

LVPS

4.8 KvCharging

Pulse

1:30

A15A5

WSR 88D Transmitter Functional Block

TRIGGER Triggers from RDASC

xxx

CB2

CB1

CB2

CB1

CB2

UD3A3A3 Test Point

Legend

320

322

315

311

313

326

Integrated

Amp

25 AmpFocusCoil

current

Reflected PowerSample

-

+

FOR TRAINING USE ONLY NWSTC

5 Things (necessary to transmit)

Vacuum Pump Current

Filament Voltage

Mod Pulse

Focus Coil Current

RF Drive

Optical

Discharge

Trigger CCA

A3A1A1-U5 PFN

Color Transmitter Block_20170310.vsd

Pulse

Transformer

1:1

1:30

Filament

Transformer

32.4:1

1:1

15 Wpk

1.5µs (sp) - 4.5µs (lp)

RF

1-31

PROCESSOR

A3

KD

/HT

X J

16

KD

/VT

X J

17

Vert

RF

Re

ceiv

e J

11

V T

est

/ S

en

se J

15

H T

est /

Sen

se J

14

Horiz R

F R

eceiv

e

J9

TX

Sam

ple

J

18

Horiz I

F J

10

Vert

IF

J

12

ST

ALO

J

13

2A9

AME

AME COMMS

RS-422

1

Single Channel WSR-88D Signal Paths

R38 COHO PWR @

4A1J4

R39 STALO PWR @

4A1J2

R258

R257

R50 A20J1_2

R51 A20J1_3

R52 A20J1_4

R251 A20J1_5

TRANSMITTER UD3

PEDESTAL UD2

RDA DATA PROCESSOR UD90

RECEIVER CABINET UD4

AR1

AMP

W93

3W102 3W

10

3

3W

10

4

J13B

FL2

FL1

FL3

AT13

50 dB

AT8

50 Ohms

3

90/190W550

2

J28

W555

Hybrid Splitter

&

Phase Shifter

2A1A3A9

4 CHANNELAZIMUTH

ROTARY JOINT

2A1A5

ELEVATION

ROTARY

JOINT 3

1

2

3

2A5 RF PALLET

2W

57

5

2W

57

4

2W

55

2

2W

55

9

2

W56

0

2

W55

8

2W567

2W568

W550

2

1

3

A1 – ANT GAIN

R261 – ANT NOISE

TEMP

42W569 2W561 2W563

2A1A2

SLIP

RINGS

-50 dB

-30 dB

-30 dB

CP10FL1

LOW PASS

FILTER

R254 RF_4/104W357-OUT

DC1J1

J4

DC2J1

DC3J1

4W583

2W

55

5

2W

57

7

20 dBJ2

J3

V

2W

55

6

2W

57

6

20 dB

RECEIVER MODULE A2

A4

J3

J2

A1

H

Cable

Ad

ap

ter

Pla

te

Cable Adapter Plate

V

H

S

J6

J5

J4

LNA LNA

Ban

dp

ass

Filt

er

Ban

dp

ass

Filt

er

W11

4

RDA INTERFACE UNIT

RCP COM 1 AME COM

Horizontal IF Returns / Test Signals

Vertical IF Returns / Test Signals

STALO

W54

W53

W10

W56

W55

RS-232RS-422

RDA Shelter Wall

RDA Shelter Wall

XM

T S

EN

SE

XM

T S

EN

SE

CW

KD

/ N

OIS

E

KD

/ N

OIS

E

1

2

V

H

A3

A5

R3

3

R3

4

R2

88

19200 baud

STALO

Power / Control / Status

Power / Control / Status

BITE/CAL ASSY A4COHO

CW

H & V test

Switching

And

DelayH & V

Xmit Samples

Xmit Sample

KD or NoiseKD or Noise

Noise

Mixer

T

2

3

4

1

4/104W357

4/104W573

J21

AT550 dB

Adaptation Data

Tx/Rx Signal

Test Signal

Reference Signal

Control Signal

LEGEND

* Site Dependent

J5 J3

J29

4W584W550

W56

J15

4W568

W55

J16

4W567

W10

J2

4W582

W22 4/104W455

J23

R259

AT12

8 dB ATTN

4/104W67

4/104W66

J13A

AT16

0-12 dB

AT17

0-12 dB

4/104W601

90/190W602

90/190W844

CP1

J9

CP7

A38 IFDR

4/104W463

4/104W353

90/190W71

4/104W107

4/104W132

4/104W463

4/104W105

W59 W61

2W564 (LPP) 2W565 (LPP)

NX3841-C

T/R LIM T/R LIM

2W

55

7

CP2

2W

57

2

CP1

2W

57

3

CP3

A40

2A2A2

J3

J2

J1

SPIP

J6

J5

SERIAL

RIGHT

RSPA11

ETH

RIGHT

TOP

ETH

MID

TOP

ETH

MIDBOT

J16

90/190W813 W22

J2

J7

J13E

J7

J5

3W105

CP14

W60

SEE NOTE

NOTE: CABLE CONNECTED TO UD4 BUT NOT USED INTERNALLY.

MATCH FILTER

R41 SHORT

R40 LONG

CP8

TO RPG VIA LAN SWITCH AND ROUTER

A15

5

4/104W129

FPGA

J18

* W/G RUN FROM W/G

SWITCH 1S1 TO AZ

ROTARY JOINT

2A1A3A9

* W/G

A39 BURST MIXER

For Training Use Only 2-41

PROCESSOR

A3

KD

/HT

X J

16

KD

/VT

X J

17

Vert

RF

Re

ceiv

e J

11

V T

est

/ S

en

se J

15

H T

est /

Sen

se J

14

Horiz R

F R

eceiv

e

J9

TX

Sam

ple

J

18

Horiz I

F J

10

Vert

IF

J

12

ST

ALO

J

13

2A9

AME

AME COMMS

RS-422

W/G

Sw

Ctr

l J7

1

Redundant Channel WSR-88D Signal Paths

R38 COHO PWR @

4A1J4

R39 STALO PWR @

4A1J2

R258

R257

TRANSMITTER UD3

PEDESTAL UD2

RDA DATA PROCESSOR UD90

RECEIVER CABINET UD4

AR1

AMP

3W102 3W

10

3

3W

10

4

CP14

AT8

50 Ohms

3

RDA

INTERFACE

UNIT

A40-RED

AME

COM

2

W555

Hybrid Splitter

&

Phase Shifter

2A1A3A9

4 ChannelAzimuth

Rotary Joint

2A1A5

Elevation

Rotary Joint

2A5 RF Pallet

2W

57

5

2W

57

4

2W

55

2

2W

55

9

2W

56

0

2W

55

8

2W567

2W568

2W566

2

1

3

A1 – ANT GAIN

R261 – ANT NOISE

TEMP

42W569 2W561 2W563

2A1A2

SLIP

RINGS

-50 dB

-30 dB

-30 dB

CP10

FL1

LOW PASS

FILTER

R254 RF_4/104W357-OUT

DC1J1

J4

DC2J1

DC3J1

2W

57

8

STALO Ch 1 J3

V IF OUT Ch 1 J11

V IF OUT Ch 2 J12

H IF OUT Ch 1 J13

STALO

OUT

H IF IN V IF INCP13

4W571 (104W591 CH-1)

4W570 (104W590 CH-1)

CP12

CP11

J24

4

J2

2W

55

5

2W

57

7

20 dBJ2

J3

Ban

dp

ass

Filt

er

Ch

2

Ban

dp

ass

Filt

er

Ch

1

V

2W

55

6

2W

57

6

20 dB

Ban

dp

ass

Filt

er

Ch

2

RECEIVER MODULE A2

A4

J3

J2

Ban

dp

ass

Filt

er

Ch

1

A1

H

Cable

Ad

ap

ter

Pla

te

Cable Adapter Plate

V

H

S

J6

J5

J4

LNA LNA

RDA Shelter Wall

RDA Shelter Wall

W54

W53

W154

W56

W55

W156

W10

5

Vertical IF Returns / Test Signals

Horizontal IF Returns / Test Signals

KD

/ N

OIS

E

KD

/ N

OIS

E

XM

T S

EN

SE

XM

T S

EN

SE

CW

1

2

3

1

2

3

V

4W578 (CH-2 only)

H

A3

A5

R3

4

R3

3R2

88

P1

19200 baud

STALO

Power / Control / Status

Power / Control / Status

BITE/CAL ASSY A4COHO

CW

H & V test

Switching

And

DelayH & V

Xmit Samples

Xmit Sample

KD or NoiseKD or Noise

Noise

Mixer

T

1

2

3

4

4/104W67

4/104W66

Adaptation Data

Tx/Rx Signal

Test Signal

LEGENDReference Signal

Control Signal

W15

90/190W844

CP7

90/190W661

J21

90/190W550

90/190W813 W22

4/104W463

W93

CP1

J28

4W564

4/104W463

4/104W601

4/104W573

4/104W353

AT12

8 dB ATTN

4/104W357

W61

W60

W59

4/104W555W22

4W580

J15

W56

W55

J16

4W579

W156

J29

4W566

J2

W10 4W565

J23

J5J4J9 J2

W553

W554

4/104W129

J19 J18

W551

W552

4W

57

2

(10

4W

59

2 C

H-1

)

T/R LIMT/R LIM

2W

57

3

CP3CP1

2W

57

2

2W

55

7

CP2

COM Ch 1 J7

CH SELECT J6

STALO Ch 2 J1

H IF OUT Ch 2 J14

COM Ch 2 J8

NX3842-C

4W594

4W595

4W563

4W593

2A2A2

J3

J2

J1

* W/G RUN FROM W/G

SWITCH 1S1 TO AZ ROTARY

JOINT 2A1A3A9* W/G

SEE NOTE

NOTE: CABLE CONNECTED TO UD4 BUT NOT USED INTERNALLY.

* J2 NOT CONNECTED IN REDUNDANT CHANNEL 1

J13J76

RSP

ETH

RIGHT

TOP

ETH

MID

TOP

ETH

MIDBOT

SPIP

J7

J16

J13B

FL2

FL1

FL3

J13A

AT16

0-12 dB

AT17

0-12 dB

A38 IFDR

J2

J7

J13E

MATCH FILTER

R41 SHORT

R40 LONG

J5

A11

A1

SERIAL

RIGHT

90/190W71

TO RPG VIA LAN

SWITCH AND ROUTER

CP8

5

6 TO J7

J13J12

90/190W65 W101

INTERPANEL LINK

TO CHANNEL 1 SPIP

*

R50 A20J1_2

R51 A20J1_3

R52 A20J1_4

R251 A20J1_5

AT13

50 dB

AT550 dB

4/104W107

4/104W132

4/104W105

FPGA

J18

A39 BURST MIXER

For Training Use Only 2-43

NWS EHB 6-513

2-14

Figure 2-3. Receiver Cabinet UD4 (Sheet 2 of 2)

NWS EHB 6-511

FP-11-103/(FP-11-104 blank)

Figure FO11-13. Transmitter MajorComponents (Sheet 1 of 6)

NWS EHB 6-513

2-6

Figure 2-2. Antenna/Pedestal UD2 (Sheet 2 of 3)

NWS EHB 6-513

2-5

Figure 2-2. Antenna/Pedestal UD2 (Sheet 1 of 3)

For Training Use Only 2-55

NWS EHB 6-513

FP-5-273/(FP-5-274 blank)

Figure FO5-28. RF Pallet FunctionalBlock Diagram (Sheet 1 of 2)

NWS EHB 6-513

5-25/(5-26 blank)

Figure 5-1. Receiver Signal FlowBlock Diagram (Sheet 1 of 3)

NWS EHB 6-513

5-29/(5-30 blank)

Figure 5-1. Receiver Signal FlowBlock Diagram (Sheet 3 of 3)

NWS EHB 6-518

3-291/(3-292 blank)

Figure 3-48. AME ComponentLocations (Sheet 2 of 3)

NWS EHB 6-518

3-289/(3-290 blank)

Figure 3-48. AME ComponentLocations (Sheet 1 of 3)

NWS EHB 6-513

5-41/(5-42 blank)

Figure 5-4. IF Analog-to-DigitalConversion

NWS EHB 6-513

5-53/(5-54 blank)

Figure 5-6. Klystron Test Signal Generation

NWS EHB 6-513

2-14

Figure 2-3. Receiver Cabinet UD4 (Sheet 2 of 2)

NWS EHB 6-513

2-31

Figure 2-12. Radar Data Acquisition Data Processor Cabinet UD90/190 (Sheet 1 of 2)

NWS EHB 6-513

4-12

Figure 4-4. RDAIU 4A40 Controls and Indicators (Sheet 1 of 2)

NWS EHB 6-513

4-13

Figure 4-4. RDAIU 4A40 Controls and Indicators (Sheet 2 of 2)

P/O ANTENNA MOUNTED ELECTRONICSUD2A9

RECEIVER CABINETUD4

P/O ANTENNA MOUNTED ELECTRONICSUD2A9

RF PALLETUD2A5

IFDR4A38

TR Limiter2A5A1

Clutter Module2A9A4A4

Delay Line2A9A9

Horiz CW

Vert CW

Isolator2A9A8

Isolator2A9A7

2A9A5

2A9A6

J3

J1

J4

TX SAMPLE 2W552

Vert XMT Sample

Hybrid2A9A10

AT6-15 dB

J1

Main Bite Cal Module2A9A4A3

STAL

O

CW

J8

J6

J12

J10

J1

On rear ofBite Cal Assy.

J5

Horiz XMT Sample

2A9DC2

J3

J4

J4

Bandpass Filter2A5FL1

Low Noise Amplifier2A5A4

Gain VS TempCompensation

AT70-3 dB

AT80-3 dB

RECEIVER2A9A2

J2

J3

J4

J5

J6

J7

AT111 dB

AT121 dB

CP1

CP2

CP3 AT160-12 dB

FL1

FL2

AT170-12 dB

4A1RFGenerator

2A5DC1

J1

AZ ROTARYJOINT

2A1A3A9

J1

J2

J3

J4

J5

J6

AT3PhaseShifter

3 dB ZDRSwitch

Isolator2A9A4A5

J9

J11

J10

J13

J12

H-RF2W556

V-RF2W555

J3J1

J2

H-IF2W572

V-IF2W573

STALO2W557

2W559

2W558

2W560

2W567

2W566

2W568

KD H-TX (NOISE)

2W577

KD V-TX (NOISE)

2W576

H TEST (CW) / H SENSE 2W575

V TEST (CW) / V SENSE 2W574

J16

J17

J14J15 J13

AT4

Isolator2A9A12

Noise Module2A9A4A1

KDTest Signal

J3 J4

NoiseSource

J2

2A9DC1

J3

AT1-14 dB

AT1-30 dB

AT2-30 dB

AT2

Hybrid2A9A11

2A5DC2

J1

2A5DC3

J1

NWSTC WSR-88D Test PathsFor Training Use Only

LegendSTALO

CW

KD

NOISE

COHO

Hybrid

Step Atten2A9AT40-103dB

MatrixSwitch 2A9W57

2A9W58

2A9W

54

2A9W

55

2A9W53

2A9W212A9W272A9W28

2A9W19

2A9W26

2A9W25

2A9W22

2A9W24

2A9W37 2A9W17

2A9W38 2A9W18

2A9W19

2A9W

20

2A9W52

2A9W51

J16

J15

J29

W55

W156

W56

W53

W154

W54

/ /

/ /

/ /

Low Noise Amplifier2A5A5

Gain VS TempCompensation

J3

J2

J1Bandpass Filter2A5FL2

TR Limiter2A5A3

For Training Use Only 2-57

NWS EHB 6-518

3-289/(3-290 blank)

Figure 3-48. AME ComponentLocations (Sheet 1 of 3)

NWS EHB 6-513

5-51/(5-52 blank)

Figure 5-5. Test Signal PathBlock Diagram

- Linearity (Fast/Full)

- RCVR Bias

(5.4.6.3)

Tests Dynamic Range during Linearity test 90dB(sp) - 93dB (lp)

Switch Options:

Straight

Swapped

H to V (H isolated)

V to H (V isolated)

H only (V isolated)

V only (H isolated)

H to Both

V to Both

Isolated

"H" t/s

"V" t/s

(Table 5-3)(5.4.6.2)

- Sys Noise Temp

- Sun Check

(Table 5-2)

(5.4.6.1)

- Clutter Suppression

- RF Gen Phase Sifter Chk

- Power Sense

No loss

10us

KD & Noise

Switching

Attenuated CW andPhase Shifted CW

LNA -to-RCVR-to-IFDR

Circulators -to-Bandpass Filters-to-TR Limiters-to-LNA-to-Rcvr-to-IFDR

NWSTC MODIFIED DRAWING FOR TRAINING USE ONLY

Provides 20dB of isolation

0-6dB

0-6dB

Provide 20dB of isolation

"H" t/s

"V" t/s

6dB

Reflectivity Cals

Velocity & Phase Cals

LNA -to-RCVR-to-IFDR

For Training Use Only 2-53