Terrasat IBUC 3, Operation Manual

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Maintenance
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6-5
Engineered to Endure
Antenna is Pointed Toward Wrong Satellite or is Misaligned
Transmission to the wrong satellite or on the wrong polarization or channel can cause
interference with other satellite users and may result in fines from the satellite
operator.
To ensure that your antenna is aligned with the correct satellite,
1. Follow the antenna manufacturer’s instructions to verify the azimuth, elevation,
and polarization settings.
2. Follow the antenna manufacturer’s instructions to move the antenna into a position
that provides maximum signal strength.
3. Establish a communications link with the satellite network operations center
(NOC).
4. Peak the signal on the satellite, and then adjust polarization per guidance from
NOC staff.
Moisture Migrated Into the IBUC
Moisture can enter and damage the IBUC if waveguide gaskets are missing, there is a
hole in the feed window, or there is a break in the coaxial connectors.
To prevent moisture from entering the IBUC,
• Ensure that the paper label is removed from the waveguidre prior to installation
and operation.
• Ensure that the rubber waveguide gasket is intact and fully seated in the grooved
channel before making the connection.
• Use water-resistant wrap (or mastic tape) on all outdoor connectors to ensure a
water - tight seal. Mastic tapes are designed to flow and self - heal if cut or punctured
For more information about applying water-resistant wrap, see page 3-14 .
• Avoid using damaged connectors (for example, scratched mating surfaces,
eccentric or bent center conductors, and so on.).
Within Specifications Locked
Unit is operating normally. No alarms are
present.
Within Specifications Out-of-Lock
Causes a major alarm (Synthesizer Out of
Lock). Power amplifier is muted and the IBUC is
automatically shut-off. Synthesizer may be
faulty and the IBUC might need to be returned
for repair.
Table 6.1 Possible Scenarios for IBUCs with an External 10 MHz Reference Signal
10 MHz Reference
Signal Level
Phase-Locked Local
Oscillator
Results