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097-58001-02 Revision G – April 2008 TimeProvider User’s Guide 147
Chapter 5 Testing the TimeProvider
Verifying Normal Operation
Table 5-2 shows the condition of the LED indicators on the front panel of the IMC
under normal operating conditions.
Holdover Off Tracking at least one input
PRS Q LED Green, A LED Green
Q LED Green, A LED Off
Q LED Red, A LED Off
Enabled, qualified, and active
Enabled, qualified, and not active
Enabled and not qualified
Input 1 Q LED Green, A LED Green
Q LED Green, A LED Off
Q LED Red, A LED Off
Enabled, qualified, and active
Enabled, qualified, and not active
Enabled and not qualified
Input 2 Q LED Green, A LED Green
Q LED Green, A LED Off
Q LED Red, A LED Off
Enabled, qualified, and active
Enabled, qualified, and not active
Enabled and not qualified
GPS Off
Green
Amber
Red
1 PPS signal is not present
1 PPS signal is active
Bridging mode fault
Loss of 1 PPS signal, TPIU fault, or
antenna fault
Table 5-2. LED Conditions for the IMC and IMC/TPIU
LED Name Condition Description
Power Green Power is On
Fail Off No failure
Alarm Off No alarm
Critical Off No Critical alarms
Major Off No Major alarms
Minor Off No Minor alarms
ACO Off Alarm cutoff disabled
Table 5-1. LED Conditions for the IOC (Continued)
LED Name Condition Description