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097-58001-02 Revision G – April 2008 TimeProvider User’s Guide 157
Chapter 6 Maintaining and Troubleshooting the TimeProvider
Diagnosing the IOC
Diagnosing the IOC
Reading LED Conditions
Table 6-2 shows the function of the LED indicators on the front panel of the IOC.
Table 6-2. LED Conditions for the IOC
LED Name Condition Description
Power Green
Off
Flashing Green
Power is On
Power is Off
Warming Up
Fail Red
Off
Card failure
No failure
Alarm Red
Off
Card alarm
No alarm
Active Green
Off
Card is active
Card is in standby mode
Holdover Off
Amber
Red
Tracking at least one input
Not tracking in PRR mode; Bridging Mode
engaged
Tracking no inputs
PRS Q LED Off A LED Off
Q LED Amber A LED Off
Q LED Green A LED Green
Q LED Green A LED Off
Q LED Red A LED Off
Disabled
Enabled, in process of qualifying
Enabled, qualified, and active
Enabled, qualified, and not active
Enabled and not qualified
Input 1 Q LED Off A LED Off
Q LED Amber A LED Off
Q LED Green A LED Green
Q LED Green A LED Off
Q LED Red A LED Off
Q LED Flashing GreenA LED Off
Disabled
Enabled, in process of qualifying
Enabled, qualified, and active
Enabled, qualified, and not active
Enabled and not qualified
Enabled and not qualified: Tip-Ring reversed
Input 2 Q LED Off A LED Off
Q LED Amber A LED Off
Q LED Green A LED Green
Q LED Green A LED Off
Q LED Red A LED Off
Q LED Flashing GreenA LED Off
Disabled
Enabled, in process of qualifying
Enabled, qualified, and active
Enabled, qualified, and not active
Enabled and not qualified
Enabled and not qualified: Tip-Ring reversed
GPS Off
Green
Amber
Red
Disabled
Enabled and GPS qualified
Enabled and in Bridging mode
Enabled and GPS disqualified (except in
Bridging mode)