OLD SQUELCH Test at 30.00 MHz

TM 11-5820-401-34-3/0967-432-3060

4-5. OLD SQUELCH TEST. (CONT)

1. Turn AN/GRM-114A RF LEVEL control (1) slowly clockwise until CALL lamp lights.

STANDARD. R-442/VRC CALL lamp should light while AN/GRM-114A RF LEVEL is at or below

0.7 Uv.

2. If RF LEVEL control (1) is more than 0.7v, see troubleshooting chart 4-5.

3. Remove cable from R-442/VRC ANTENNA port.

STANDARD. R-442/VRC CALL lamp should go out.

4. If R-442/VRC CALL lamp does not go out, see troubleshooting chart 4-5.

5. Reconnect cable to R-442/VRC ANTENNA port.

STANDARD. R-442/VRC CALL lamp should light.

6. If CALL lamp does not light, see troubleshooting chart 4-5.

OLD SQUELCH Test at Other Frequencies

7. Return AN/GRM-114A RF LEVEL control (1) to minimum setting.

8. Set AN/GRM-114A RF FREQUENCY MHz thumbwheels (3) and R-442/VRC MC-TUNE-KC

switch to frequency control settings listed below. Repeat steps 1 through 7 at each

frequency.

NOTE

Change R-442/VRC to BAND

at 53, 65, and 75 MHz.

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