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Minor and Major Alarms

Minor Alarm

There are several conditions that can cause the 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 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.