AN/GRC-144(V)4 Output Power Test at 14.4 to 15.0 GHz and Power Alarm Calibration

TM 11-5820-695-35

3-76.

AN/GRC-144(V)4 Output Power Test at 14.4 to

15.0 GHz and Power Alarm Calibration

Radio Set AN/GRC-144(V)4 output power test 14.4 to 15.0

GHz assumes that the T-1054(P)A/GRC-144 output power

test has been performed and all performance standards are

in accordance with paragraph 3-72.

a. Test Equipment and Materials.

(3) Open waveguide connection at Converter-

Multiplier CV-3633/GRC-144(V) ANT J4 output and first

shelter waveguide connection by removing screws that

(1) Thermister Mount, Hewlett-Packard P486A

secure waveguide and the CV-3633/ GRC-144(V) together.

(2) Power Meter, Hewlett-Packard 432A

(4) Move the waveguide to a safe location.

(3) Attenuator, Waveline 707-20

CAUTION

b. Test Connections and Conditions.

Do not support test equipment by

waveguides. Test equipment must be

NOTE

properly supported.

NOTE

To perform the AN/ GRC-144(V)4 output

power test, the waveguide connection

Locate the test equipment close to the

at Converter Multiplier CV-3633/' GRC-

CV-3633/ GRC-144(V) to permit proper

144(V) 3A7J4 ANT waveguide flange

interconnection.

must be opened.

(5) Interconnect

the

test

equipment

(1) Record the T-1054(P)A/GRC144(V) and CV- accordance with the test setup shown in figure 3-37.

3633/GRC-144(V) filters 3A3 and 3A4 operating frequency

and dial settings respectively.

c. Initial Test Equipment Calibration.

Turn on the test equipment and allow a 30 minute warmup

NOTE

period. Use the following technical manual procedures to

zero the test equipment.

Disregard status panel waveguide

switch FREQUENCY BAND IN USE and

Item

Technical Manual

transmitter WAVEGUIDE SW indicator

alarms.

Power Meter, Hewlett

Packard HP 432A

Attenuator, Waveline

(2) Insure that transmit waveguide switch is set

707-20 (prepare a

to the 15 GHz TEST (TO LOAD) position. For the

AN/GRC-144(V)4 optional configuration, insure that Switch, calibration chart for

Waveguide SA-1679/GRC is set to{ the TO LOAD (TEST) the attenuator at 14.4

to 15.0 GHz at 0.1 GHz steps),

position.

Change 6

3-101