Chapter 9. Fault Isolation - Comtech EF Data SDM-300L3 Installation And Operation Manual

Chapter 9. FAULT ISOLATION

9.1 Fault Isolation
The modem's design allows a technician to repair a faulty modem on location.
CAUTION
The fault isolation procedure lists the following categories of faults or alarms.
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Note: Each fault or alarm category includes possible problems and the appropriate action
required to repair the modem.
If any of the troubleshooting procedures mentioned earlier in this chapter do not isolate
the problem, and Comtech EF Data Customer Support assistance is necessary, have the
following information available for the representative:
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This equipment contains parts and assemblies sensitive to damage by ESD.
Use ESD precautionary procedures when touching, removing, or inserting
PCBs.
Modulator
Demodulator
Transmit Interface
Receive Interface
Common Equipment
Backward Alarms
Modem configuration. Modem configuration includes the modulator,
demodulator, interface, or local AUPC sections.
Faults (active or stored).
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