Codan 6725-W/E-AC/EX-CE - Figure 21: BUC Fault Diagnosis Chart 6

Maintenance and fault finding
92 Block Up Converter Systems 6700/6900 series User Guide
Figure 21: BUC fault diagnosis chart 6
BUC fault
diagnosis chart 6
Check for presence of
Tx IF from modem at
both ends of the Tx IF
cable (Test D)*.
OK?
Is the
transmit
attenuator setting
correct?
* Refer to test
procedures
BUC faulty.
Refer to Codan.
Set the correct
transmit attenuator
setting using STA
command.
Modem, any other
device on IF cable, or
cable faulty. Replace
as required.
Yes
Yes
No
No