Safran VersaSync User Manual page 297

Displays log entries created for all configuration changes that have occurred
(such as creating a new user account, for example).
NTP Log
The NTP log displays operational information about the NTP daemon, as well as
NTP throughput statistics (e.g., packets/sec.). Examples for entries in this log
include indications for when NTP was synchronized to its configured references
(e.g., it became a Stratum 1 time server), as well as stratum level of the NTP ref-
erences.
The NTP throughput statistics data can be utilized to calculate mean values and
the standard deviation.
Example log entries include:
Oscillator Log
Displays log entries related to oscillator disciplining. Provides the calculated fre-
quency error periodically while synchronizing to a reference.
GPS Qualification Log
If VersaSync is connected to a GNSS antenna and is tracking satellites, this log
contains a running hourly count of the number of GNSS satellites tracked each
hour. This history data can be used to determine if a GNSS reception problem
exists and whether this is a continuous or intermittent reception issue.
GNSS reception may be displayed as cyclic in nature. A cyclic 12 hour pattern of
decreased GNSS reception typically indicates that the GNSS antenna has an
obstructed view of the horizon. The GNSS satellites are in a 12-hour orbit, so if
part of the sky is blocked by large obstructions, at the same time every day (at
approximately 12 hour intervals), the GNSS reception may be reduced or may van-
ish altogether. If this occurs, the antenna should be relocated to afford it an unob-
structed view of the sky.
CHAPTER •
4 VersaSync User Manual Rev. 12
Synchronized to (IP address),
Stratum 1 NTP server.
ntp exiting on signal
the network that it is a Stratum 15 time server because it is not syn-
chronized to its selected reference.
Time reset xxxxx s: These entries indicate time corrections (in seconds)
applied to NTP.
No servers reachable: NTP cannot locate any of its configured NTP servers.
Synchronized to PPS(0),
erence clock driver (which provides more stable NTP synchronization).
stratum=1: NTP is synchronizing to another
15: This log entry indicates NTP is now indicating to
stratum=0: NTP is synchronized using the PPS ref-
4.6 Quality Management
283