Spectracom - Essential Ingenuity

Amber/Orange Sync LED Indication

Question

Why does my SecureSync or NetClock 9400 periodically (or always) have an amber/orange Sync LED (not green)?

Answer

An amber/orange front panel sync LED (along with the holdover alarm) is an indication that the unit is in “holdover” mode. There are 2 possible conditions that cause holdover:
  • All input references are lost or not valid.
  • The TFOM (Time Frequency of Merit) estimated time error value is exceeding the user-configurable MaxTFOM value.
See the article Troubleshooting Holdover for more information and for tips on troubleshooting the permanent or temporary loss of references. See the article Understanding MaxTFOM for more information about this user-configurable parameter.

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