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|  TM 11-5820-401-34-3/0967-LP-432-3060
4-4.
NEW SQUELCH TEST. (CONT)
NOTE
Change R-442/VRC to BAND
at 53, 65, and 75 MHz.
EQUIVALENT AN/GRM-114A THUMBWHEEL SETTING
R-442/VRC SWITCH SETTING
I
41.00
MHz
041000.0
Hz
052000.0
Hz
52.00
MHz
053000.0
Hz
53.00
MHz
65.00
MHz
065000.0
Hz
075000.0
Hz
75.00
MHz
4-5.
OLD SQUELCH TEST.
PURPOSE. This test checks the sensitivity of the R-442/VRC squelch modules (A5200, A5300) to
OLD SQUELCH noise components (7300 Hz) at several carrier frequencies. Proper operation of the
squelch modules is verified by the CALL lamp response to signal strength at or below a 0.7-v rf car-
rier level.
TEST EQUIPMENT AND MATERIALS
Test Set AN/GRM-114A
Power Supply PP-1104(*)/G
Rf Cable RG-58/U
Maintenance Kit MK-1978/VRC
TEST SETUP. Connect equipment as shown in test setup diagram
.
4-11
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