TM 11-5820-880-12
WARNING
Shut off or disconnect all transceivers before performing maintenance
or troubleshooting on any part of the multiplexer.
Table 3-2. Troubleshooting
Step
Operation
Normal indication
Corrective procedure
Provided the band-pass filter is
1
tuned to the transceiver frequency,
check rf power output of the
transceiver. Set the band-pass
filter meter function switch to 60W-F.
If rf power output is 0, check
coax connectors from the
Forward power output 35 to 60 watts
transceiver to the multi-
for the VRC-12 family.
plexer. If power output is still
0, refer to the transceiver
operator's manual.
2
Observe the meter during tuning.
Set band-pass filter meter
function switch to 60W-R.
If the tuning meter indicates
a high reading during tuning
or the meter movement does
not go to a minimum, check
the multiplexer and antenna
coax connections. If this
does not solve the problem,
refer to organizational main-
tenance for a replacement
band-pass filter.
Reflected power output is low.
3-6
