Spectracom VersaSync User Manual page 225

E X A M P L E :
GNSS is the highest priority reference with IRIG input being a lower priority. VersaSync 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.
Authentication Log
Displays log entries for authentication events (e.g., unsuccessful login attempts, an incorrectly
entered password, etc.) that are made to VersaSync's command line interfaces (such as telnet,
SSH, FTP, etc.).
Events Log
Displays log entries related to GNSS reception status changes, Sync/Holdover state changes,
SNMP traps being sent, etc. Examples include:
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4 VersaSync User Manual Rev. 6.0
Not In Sync : VersaSync 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 : VersaSync 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.
Reference Change : VersaSync has switched from one input reference to another (for
example, IRIG was the selected input being used, but now GNSS is the selected ref-
erence).
GPS Antenna Problem : The GPS Antenna Problem alarm indicates the GNSS receiver has
detected an over-current or undercurrent condition (an open or short exists in the GNSS
antenna cable, or the GNSS antenna is not connected to VersaSync). The receiver will
attempt to continue the normal acquisition and tracking process regardless of the
antenna status. The current draw measurements that will indicate an antenna problem
are:
Under-current indication < 8 mA
Over-current indication > 80 mA
Note: This alarm condition will also be present if a GNSS antenna splitter that
does not contain a load to simulate an antenna being present is being used.
4.6 Quality Management
213