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116 TimeAnalyzer 7x00 User’s Guide
098-00208-000 Revision A – February, 2010
Chapter 6 Maintenance and Troubleshooting
Troubleshooting
Diagnosing the IOC
Reading LED Conditions
shows the function of the LED indicators on the IOC of the TP5000 probe
module.
System in Holdover
Not tracking E1 Input
(GPS LED is OFF)
Loss of Signal (LOS) of
E1 Input
Check connection for E1 input
Check E1 input source
Alarm Indication Signal
(AIS)
Check E1 input source
Out of Frame (OOF)
Check E1 input source
Signal amplitude level
Check E1 input source.
Check cables
System stays in warm-up
ToD source (GPS or E1)
invalid
Check Input source.
Check alarms with “show alarm-config”
command.
Warm-up still in progress
Typical warm-up time for the Active card
is:
Quartz 30
40 minutes
Rubidium
50
60 minutes
Standby IOC starts locking to Active IOC
after Active IOC enters normal track.
Allow an additional ~20 minutes for
Standby card to completes warm-up.
Table 6-3. LED Conditions for the IOC Card - TP5000 Probe Module
Indicator
Label
Description
Corrective Action
Power
Module Power
Indicator
PWR
Green - Module power available
n/a
Off - Module power not available
Check power supply
,“No LED lit on
any module” for probable causes
and more corrective actions.
Table 6-2. Troubleshooting Symptoms - TP5000 Probe Module
Symptom
Probable Cause
Troubleshooting Procedure /
Corrective Action