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RedMAX Administration and Maintenance Guide
Redline Communications Inc. Confidential and Proprietary
tracking from the satellite signal there is no problem; however, If the signal is not
re-acquired, then when the internal oscillator can no longer maintain the signal, your
system timing will drift and result in significant RF interference issues.
Figure 3-1
AN100UX Event Log Showing Synchronization Messages
You need to be aware when your GPS goes into holdover.
SNMP traps are sent under certain condition and if you have configured trap receivers,
these traps can be configured to trigger alarms.
If you are not using trap receivers, then you need to monitor the event log and understand
that the sequence of events, shown in Figure 3-1, above, likely means that the GPS has
entered holdover. You can use the Perl script, errorReport.pl, as described in “Script –
errorReport.pl” on page A-5.
Note
There is no specific sector controller event log message associated with the GPS
clock entering holdover mode.
There is no other indication, to the AN100U/UX, that the GPS has entered holdover.
Additionally, there is no clear indication that the GPS has re-acquired the signal and is
receiving the satellite signal as opposed to its internal holdover signal.
You will need to investigate the GPS device to either clear the holdover manually by
resetting the device or verify that it is operating correctly and is receiving the satellite
signal.
