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TM 11-5820-890-30-5
3-17. OPERATIONAL CHECK. Continued
Step 1. SELF-TEST, RECEIVE, AND TRANSMIT CHECK. Continued
Action
h. Connect DMM to RF PROBE.
Set UUT RT: FCTN: SQ ON.
Set PTT: UUT.
Read DMM. Repeat for each channel.
i.
Set PTT: OFF.
Set power supply to 22 V dc.
j.
Set PTT: UUT.
Read DMM.
k. Set PTT: OFF.
Set power supply to 31 V dc.
Set PTT: UUT.
Read DMM.
l.
Set PTT: OFF.
Set power supply to 27.5 V dc.
m. Set RF SWITCH: 2.
Set UUT RT: RF: M.
n. Set PTT: UUT.
Read frequency counter.
o. Set RF SWITCH: 1.
Set UUT RT: RF: HI.
Read SIG display.
p. Press handset PTT switch and talk into
handset.
q. Set PTT: OFF.
Response
h. DMM reads 35 to 39 dBm for all channels.
If not, go to chart 2.
i.
No response.
j.
DMM reads 35 to 39 dBm for all channels.
If not, go to chart 2.
k. DMM reads 35 to 39 dBm for all channels.
If not, go to chart 2.
l.
No response.
m. No response.
n. Frequencies should read:
CHAN
Frequency (MHz)
MAN
48.999750 to 49.000250
1
87.974550 to 87.975450
2
54.999770 to 55.000230
3
32.999825 to 33.000175
4
39.999800 to 40.000200
5
60.999700 to 61.000300
6
71.999650 to 72.000350
CUE
79.999600 to 80.000400
If not, the RT is bad. See chapter 2.
o. SIG display reading is 5, 6, or 7. If not,
the RT is bad. See chapter 2.
p. Sidetone is present. If not, the RT is bad.
See chapter 2.
q. No response.
3-29
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