Spectracom NetClock 9400 Series, Руководство пользователя

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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 Hol
dover period expired (Time Sync alarm is asserted).
In Sync : NetClock is synchronized to its Time and 1PPS inputs.
Not In Sync : NetClock is not synchronized to its Time and 1PPS inputs and is not cur
rently 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.
Sending trap for event 1 (SNMPSAD) : An SNMP trap was sent by the SNMP agent to
the SNMP Manager. The event number in this entry indicates which SNMP trap was sent.
The Unit has Rebooted : NetClock was either rebooted or power cycled.
Alarms Log
Displays log entries for the Timing System, for example:
The Unit has Rebooted : NetClock 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 Hol
dover period expired (Time Sync alarm is asserted).
In Sync : NetClock is synchronized to its selected Time and 1PPS reference inputs.
Not In Sync : NetClock is not synchronized to its Time and 1PPS inputs and is not cur
rently 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 frequency error was
too large. Or, the frequency couldn’t be measured because a valid input reference was
not available.
Reference change : NetClock has selected a different Time and 1PPS input reference for
synchronization. Either the previously selected input reference was declared not valid (or
was lost), so a lower priority reference (as defined by the Reference Priority Setup table)
is now selected for synchronization OR a valid reference with higher priority than the
previous reference 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. NetClock is synced to
GNSS and so GNSS is the selected reference. The GNSS antenna is disconnected and IRIG
becomes the selected reference. The Reference change entry is added to this log.
Timing Log
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CHAPTER
4
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NetClock User Reference Guide Rev. 16
4.5 Quality Management