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TM 11-5820-890-30-5
2-29. OPERATIONAL CHECK. Continued
Step 6. RF OUTPUT CHECK. Continued
Action
Response
j.
Set frequency counter to 500 load.
j.
Frequency counter reads:
Set CHAN switch to each position.
CHAN
FREQUENCY (Hz)
Read frequency counter.
MAN
29999850 to 30000150
1
37874800 to 37875200
2
42974800 to 42975200
NOTE:
3
43374800 to 43375200
4
49074750 to 49075250
If reading is incorrect, set FCTN GEN
5
56199700 to 56200300
LEVEL to minimum and read frequency
6
68774650 to 68775350
counter again.
CUE
87974550 to 87975450
If any channel is incorrect, go to
chart 15 at node on sheet 4.
k. Set PTT: OFF.
Return frequency counter to 1 M W load.
k. No response.
Step 7. SIDETONE CHECK.
Action
Response
a.
Set UUT RT: RF: HI.
a.
No response.
Disconnect RF test cable at test adapter
UUT ANT connector.
Set RF SWITCH: 1.
b. Set PTT: UUT.
b. Sidetone should not be present. If it is,
Press handset PTT switch and check for
go to chart 19.
sidetone.
c.
Reconnect RF cable to maintenance
c.
No response.
group UUT ANT connector.
d. Press handset PTT switch and check for
d. Sidetone should be present. If it is not,
sidetone.
go to chart 20.
e.
Set PTT: OFF.
e.
No response.
Step 8. SQUELCH CHECK.
Action
Response
a.
Set UUT RT: FCTN: SQ OFF.
a.
Rushing noise is present in handset. If
Listen to handset.
not, go to chart 21.
b. Adjust VOL control.
b. Volume in handset varies. If not, go to
chart 8. Also, see figure FO-7.
c. Set UUT RT: FCTN: SQ ON.
c.
Rushing noise is not present in handset.
Listen to handset.
If it is present, go to chart 22.
2-37
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