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Minor and Major Alarms

Minor Alarm

There are several conditions that can cause the front panel Fault lamp, or Web UI status lights to indicate a Minor alarm has been asserted. These conditions include:

  • Too few GPS satellites, 1st threshold: The GNSS receiver has been tracking less than the minimum number of satellites for too long of a duration. Refer to Troubleshooting GNSS Reception for information on troubleshooting GNSS reception issues.

Major Alarm

There are several conditions that can cause the front panel Fault lamp, or Web UI status lights to indicate a Major alarm has been asserted. These conditions include:

  • Frequency error: Indicates a jump in the oscillator’s output frequency has been detected. Contact Tech Support for additional information.
  • 1PPS is not in specification: The 1PPS input reference is either not present or is not qualified.
  • System Sync: A Major alarm is asserted when the Timing System is not in sync (Input references are not available and the unit is not in Holdover). Examples of not being synced include:
    • When the Timing System has just booted-up and has not yet synced to a reference.
    • When all input references were lost and Holdover Mode has since expired.
  • Timing System Error: A problem has occurred in the Timing System. Contact Spectracom technical support if the error continues.