Spectracom SecureSync User Reference Manual page 274

4.11 Logs
or may vanish altogether. If this occurs, the antenna should be relocated to afford it an unob-
structed view of the sky.
Every hour (displayed in the log as UTC time), SecureSync counts the total number of satellites
that were tracked during that hour. The GNSS qualification log shows the number of satellites that
were tracked followed by the number of seconds that the particular number of satellites were
tracked during the hour (3600 seconds indicates a full hour). The number to the left of the "=" sign
indicates the number of satellites tracked and the number to the right of the "=" sign indicates the
number of seconds (out of a total of 3600 seconds in an hour) that the unit was tracking that num-
ber of satellites. For example, "0=3600" indicates the unit was tracking 0 satellites for the entire
hour, while "0=2700 1=900" indicates the unit was tracking one satellite for 900 seconds, but for
the remaining portion of the hour it was tracking zero satellites.
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 satellites were
tracked over a given hour. If for every second of the hour a tracked satellite was in view, the Qual-
ity value will equal 3600. For every second SecureSync tracked less than the minimum 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 satel-
lites 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 inter-
mittent, 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.
Oscillator Log
Displays log entries related to oscillator disciplining. Provides the calculated frequency error peri-
odically while synchronizing to a reference.
TimeKeeper Log
Displays log entries related to TimeKeeper (if activated).
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NOTE – If SecureSync is not connected to a GNSS antenna, this log will remain
empty.
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4 SecureSync User Reference Guide Rev. 18