TM 1-1510-223-10
Table 3-1. VHF Communications Transceiver Fault Codes
CODE
INTERPRETATION
00
No fault found
01
5 V dc below limit
02
5 V dc above limit
03
12 V dc below limit
04
12 V dc above limit
05
Synthesizer not locked
07
Noise squelch open without signal
08
Noise squelch not open with signal
12
BCD frequency code invalid
13
2-out-of-5 frequency code invalid
14
Serial message invalid
15
Frequency out of range
16
Forward power below limit
17
Transmitter temperature excessive
21
Tuning voltage out of limit at highest receive frequency
22
Tuning voltage out of limit at 118 MHz
23
Local oscillator output below limit
24
No-signal AGC voltage too high
25
Inadequate AGC voltage increase with RF signal
26
Reflected RF power above limit
27
Transmitter timed out
BT03838
Figure 3-5. HF Communications Transceiver Control Unit
STO
switch
is
pressed
simultaneously
with
a
microphone transmit switch, a 1000 Hz operator
attention tone will be transmitted (required by some
Canadian radiotelephone stations).
(4)
Frequency/channel selector knob. The
frequency/channel selector knob (inner concentric with
the
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