TM 11-5820-890-30-4
12-23. OPERATIONAL CHECK. Continued
Step 3. ICM TEST. Continued
Action
Response
g. Press handset PIT switch, talk, and listen.
g. Clear and intelligible voice is heard in
handset. If not, go to chart 17.
h. RCU: Pull VOL switch out.
h. Louder clear and intelligible voice is heard
Press handset PTT switch, talk, and listen.
in handset. If not, go to chart 18. If signal
is present but drops out, go to chart 17.
Step 4. FREQUENCY LOAD TEST.
Action
Response
a. Push RCU: VOL switch in.
a. RCU display reads:
Set test adapter:
PIT: OFF.
Set RCU:
FCTN: LD
CHAN: CUE.
If not, go to chart 19.
b. Press RCU: FREQ key.
b. RCU display reads:
If not, go to chart 20.
c. Press RCU: CLR key.
c. RCU display reads:
If not, go to chart 21.
d. Load 32000 kHz into RCU CUE channel.
d. Frequency loads correctly. If not, go to
chart 20.
12-31