Loss Of Signal Faults; Troubleshooting Charts - Symmetricom TSG-3800 Series User Manual

The TSG re-establishes the reference phase whenever:
The clock oscillator enters Acquire Mode
The input reference switches
Testing and maintenance of the TSG-3800 can lead to an excessive accumulated
phase offset. The internal oscillator frequency changes in an attempt to minimize
the phase error. Re-establishing a new reference phase offset corrects for this
problem. To do this, use the

Loss of Signal Faults

Loss of signal (LOS) errors report automatically to the EIA-232 ports. A LOS fault
does not necessarily light the LOS indicator. These errors can result from:
No input reference signal (LOS indicator is on)
An intermittent input reference signal (LOS indicator may be on)
Jitter exceeding specification on the input reference signal (LOS indicator off)

Troubleshooting Charts

This section contains troubleshooting charts for individual modules.
12778474-002-2 Revision F – March 2004
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command.
PHASE {input} ZERO
Maintenance and Troubleshooting
Troubleshooting Charts
TSG-3800 User's Guide 121