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|  TM 11-5820-401-34-3/0967-LP-432-3060
RECEIVER SENSITIVITY TEST. (CONT)
4-3.
Sensitivity Test at 30.00 MHz
1. Connect MM-100E attenuated probe A to MK-1978/VRC SPKR jack; connect probe B to GND.
(See test setup diagram , page 4-5.)
2. Adjust R-442/VRC VOLUME control for 17-volt indication on MM-100E meter.
3. If 17-volt indication cannot be obtained on MM-100E, see troubleshooting chart 4-6.
4. Change MM-100E RANGE switch to SINAD.
STANDARD. MM-100E blue SINAD scale should indicate 10 or greater.
5. If MM-100E scale indicates less than 10, see troubleshooting chart 4-2.
Sensitivity Test at Other Frequencies
6. Set AN/GRM-114A RF FREQUENCY MHz thumbwheels (1) and R-442/VRC MC-TUNE-KC
switch to frequency control settings listed below. After each frequency change, note
MM-100E blue SINAD scale indication.
R-442/VRC SWITCH SETTINGS
EQUIVALENT AN/GRM-114A THUMBWHEEL SETTINGS
I
41.00
MHz (BAND
)
041000.0
Hz
52.00
MHz(BAND
)
052000.0
Hz
53.00
MHz (BANd D )
053000.0
Hz
64.00
MHz (BAND
)
064000.0
Hz
75.00
MHz (BAND
)
075000.0
Hz
4-7
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