IBUC Operation Manual
Terrasat Communications, Inc.
Rev. A
5-4
Warning; DC power will be present on the cable so the use of a DC block is
recommended.
- Connect the LNB to the demodulator (or IFU) by attaching the coaxial cables from
the RX L-band OUT on the LNB to the demodulator (or IFU) RX L-band input port. If
the RX level is low check the cable, the feedhorn and antenna for proper operation.
Common Problems
The following common problems or occurrences have been noted during normal
troubleshooting:
Supply voltage at IBUC is low or missing
10MHz reference at the IBUC is at the wrong level or missing
10MHz phase noise does not meet the minimum requirements
Antenna is misaligned
Bad OMT and/or antenna
Damaged cables
Antenna on the wrong satellite
TX L-band input level is misadjusted or turned off
Water in the IBUC due to no gasket in the waveguide or a hole in the feed window.
Water in the coax connectors
Incorrect frequency settings
Tx output is disabled
Repair Policy
The Terrasat IBUC and PSUI are not field repairable.
In the event that a failure has been detected it may be necessary to return the defective
unit to the factory or factory authorized service center. Refer to chapter 1 for returning a
defective unit to the factory.
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