CV-3633/GRC-144(V) Local Oscillator Frequency Accuracy Test and Alarm Calibration

TM 11-5820-695-35

3-78.

CV-3633/GRC-144(V) Local Oscillator Frequency

NOTE

Accuracy Test and Alarm Calibration

Disregard status panel waveguide

switch FREQUENCY BAND IN USE and

a. Test Equipment and Materials

transmitter WAVEGUIDE SW indicator

alarms.

(1) Frequency Counter, Hewlett Packard 5340A.

(2) Insure that transmit switch waveguide is set

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

(2) Test Cable, N(M) to N(M), Pomona 1680-T-60.

AN/GRC-144 (V)4 optional configuration, insure that

Switch, Waveguide SA-1679/GRC is set to the TO LOAD

(3) Signal Generator, Hewlett Packard 626A.

(TEST) position.

(4) Adapter WG/N(F), Narda 609.

(5) Directional Coupler, Hewlett Packard P752D.

(6) Waveguide, Flexible, HP11503A.

b. Test Connections and Conditions

Record the CV-3633/GRC-144(V) operating frequency.

(3) Break waveguide connection at Converter-

NOTE

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

shelter waveguide connection by removing screws that

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

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

oscillator frequency accuracy test and

together.

alarm calibration test, the waveguide

connection at Converter-Multiplier CV-

(4) Move the waveguide to a safe location.

3633/GRC-144(V)

3A7J4

ANT

waveguide flange must be opened.

(5) Interconnect the test equipment in

accordance with the test setup shown in figure 3-39.

(1) Record the T-1054(P)A/GRC144(V) and

CV-3633/GRC-144(V) filter 3A3 and 3A4 operating

c. Initial Test Equipment Calibration.

frequency and dial settings respectively.

Turn on the frequency counter and signal generator and

allow a 15 minute warmup period.

Change 6 3-108.1/(3-108.2 blank)