TM 11-5820-890-30-4
12-23. OPERATIONAL CHECK. Continued
Step 6. COMSEC VARIABLE LOAD TEST. Continued
Action
Response
b. While listening to handset and observing
b. RCU display blinks while reading:
RCU display, press RCU: STO key.
Then press RCU: CMSC/1 key.
and alarm tone stops, followed by one
beep. If not, go to chart 25.
c. While listening to handset, load and store
c. Two beeps are heard in handset after
variables 2-6 into RCU CHAN 2-6 (vari-
pressing STO and channel number for
able 2 into CHAN 2, variable 3 into CHAN
each variable. If not, the COMSEC module
3, etc.) Two beeps should be heard after
(19A11) is bad.
pressing STO and channel number for
each variable.
d. Set KYK-13: FUNCTION switch: OFF.
d. No response.
Disconnect KYK-13 W13 cable from RCU
AUD/FILL connector.
Step 7. TRANSMIT VOICE TEST.
SET:
RCU:
TEST ADAPTER:
RF SIGNAL GENERATOR:
FCTN: SQ ON
RESPONSE: 3
FREQ:
29.999 TO 30.001 MHz
MOD GEN: ON
OUTPUT LEVEL: -50 dBm
FM:
AC
RF:
ON
Action
Response
a. Connect W1 cable from test adapter UUT
a. No response.
ANT connector to REF RT ANT connector.
b. Set test adapter:
b. No response.
PTT: UUT.
c. Adjust FM PEAK DEVIATION on RF signal
c. FM deviation can be adjusted to between
generator to between 4 and 5 kHz.
4 and 5 kHz. If not, go to chart 26.
12-34
