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SHM-768K
5. Tests and Diagnostics
5.1 General
This chapter contains information on system test and fault isolation
procedures.
5.2 Loop Tests Procedure
The test switches and LED indicators built into the SHM-768K allow rapid
checking of the data terminals, SHM-768K and lines. Use the test procedures
provided in this chapter to verify normal system operation and to isolate
faulty equipment in the event of failure. Each test verifies the operational
performance of a unit in the system or provides a positive indication of
equipment failure.
Before testing operation of the data system equipment and line circuits,
make sure that all units are turned on and configured correctly.
5.3 Bit Error Rate Tester (BERT)
The Bit Error Rate Tester (BERT) can be activated in any diagnostics test in
which the test pattern transmitted is looped back to the BERT for comparison
(Figure 5-1).
