Every hourly entry in the log also contains a quality value, represented by “Q= xxxx” (where x
can be any number from 0000 through 3600). The Qualification log records how many satel-
lites were tracked over a given hour. If for every second of the hour a tracked satellite was in
view, the Quality value will equal 3600. For every second SecureSync tracked less than the min-
imum number of satellites, the value will be less than 3600. The minimum requirement is one
satellite at all times after the unit has completed the GNSS survey and indicates “Stationary”. A
minimum of four satellites are required in order for the GNSS survey to be initially completed.
If all entries in the qualification log are displayed as “0=3600”, a constant GNSS reception
problem exists, so the cause of the reception issue is continuous. If the unit occasionally shows
0=3600 but at other times shows that 1 through 12 have numbers of other than “0000”, the
reception is intermittent, so the cause of the reception issue is intermittent. If the Quality value
normally equals 3600 but drops to lower than 3600 about every 12 hours, the issue is likely
caused by the GNSS antenna having an obstructed view of the sky.
E x a m p l e G P S Q u a l i f i c a t i o n L o g E n t r y :
6 = 151 7 = 1894 8 = 480 9 = 534 10 = 433 12 = 108 Q = 3600
In this example, SecureSync tracked no less that 6 satellites for the entire hour. Out of the entire
hour, it was tracking 6 satellites for a cumulative total of 151 seconds (not necessarily in a
row). For the duration of the hour, it was tracking, 7, 8, 9, 10 and 12 satellites for a period of
time. Because it was tracking at least at least one satellite for the entire hour, this Quality value
is Q=3600.
Note: If SecureSync is not connected to a GNSS antenna, this log will remain
empty.
System Log
Displays log entries related to the Timing System events and daemon events (such as the Alarms,
Monitor, Notification, or SNMP daemons starting or stopping, etc.)
Timing Log
Displays log entries related to Input reference state changes (for example, IRIG input is not con-
sidered valid), antenna cable status. Examples include:
GRGR = GNSS Reference
1
antenna fault: The GNSS 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
SecureSync). The receiver will attempt to continue the normal acquisition and tracking
process regardless of the antenna status.
1
GR = GNSS Reference
4.5 Quality Management
CHAPTER 4 • SecureSync User Reference Guide Rev. 26
307
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