accumulating over time: Some types of logs will fill up within days, while others
can take months until they have reached their maximum storage capacity.
You can delete logs at any time, see .
4.5.2.1 Types of Logs
SecureSync generates log files for the following event categories:
Alarms Log
Displays log entries for the Timing System, for example:
The Unit has Rebooted: SecureSync was either rebooted or power cycled.
In Holdover: Input references were available, but all input references have
since been lost. If the references are not restored before the Holdover
period expires, time sync will be lost.
No longer in Holdover: Input references were lost at one point (or
declared not valid), but have since been restored OR the Input references
were not restored before the Holdover period expired (Time Sync alarm is
asserted).
In Sync: SecureSync is synchronized to its selected Time and 1PPS ref-
erence inputs.
Not In Sync: SecureSync is not synchronized to its Time and 1PPS inputs
and is not currently in Holdover. NTP will indicate to the network that it is
Stratum 15 and so the time server likely be ignored as a time reference.
Frequency Error: The oscillator’s frequency was measured and the fre-
quency error was too large. Or, the frequency couldn’t be measured
because a valid input reference was not available.
Reference change: SecureSync has selected a different Time and 1PPS
input reference for synchronization. Either the previously selected input ref-
erence was declared not valid (or was lost), so a lower priority reference (as
defined by the Reference Priority Setup table) is now selected for syn-
chronization OR a valid reference with higher priority than the previous ref-
erence is now selected for synchronization.
E X A M P L E :
GNSS is the highest priority reference with IRIG input being a lower priority. SecureSync
is synced to GNSS and so GNSS is the selected reference. The GNSS antenna is dis-
connected and IRIG becomes the selected reference. The Reference change entry is
added to this log.
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CHAPTER 4 • SecureSync 2400 User Manual Rev. 5.2
4.5 Quality Management
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