TM 55-1930-209-14&P-12
6.
Key the transmitter and verify that there is 0.8 to 1 watt power output o, channels 06, 16, and 26.
7.
Key the transmitter and verify that there is no power output on channels 01W, 02W, and 03W.
8.
Set an FM communications monitor to measure the exact transmitter frequency of channel 06.
9.
Key the transmitter and verify that the FM monitor indicates the exact frequency ±500 Hz.
10.
Repeat Steps 8 and 9 for channels 16 and 26.
11.
Set the communications monitor to measure transmitter deviation.
12.
Key the transmitter and speak into the microphone. Deviation must not exceed ±5.0 kHz.
II.
Receiver
1.
Connect the signal generator function of the FM communications monitor to the antenna receptacle.
2.
Connect a voltmeter, set for AC volts, to the speaker jack with a 4 ohm, 5 watt resistor in parallel.
3.
Select channel 06.
4.
Turn the squelch control fully counterclockwise (maximum speaker noise).
5.
Adjust the volume control for a voltmeter reading of 1.4 VAC.
6.
Set the signal generator to the exact receiver frequency (no modulation).
7.
Slowly increase the signal level until the voltmeter reading is reduced to 0.14 VAC (20 dB decrease). Verify
that the signal generator output does not exceed 0.5 uV.
8.
Reduce the signal generator output to zero.
9.
Adjust the squelch control to the point where speaker noise just cuts out (threshold).
10.
Set the internal modulation of the signal generator to ±3 kHz, with 1 kHz audio, then increase the output until
audio is regained. Verify that the signal generator output does not exceed 0.25 uV.
11.
Turn the squelch control fully clockwise (fully squelched).
12.
Increase the signal generator output until audio is regained. Verify that the signal generator output does not
exceed 6.5 uV.
13.
Repeat Steps 4 through 12 for channels 16 and 26.
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