Manually Setting The Time - Safran SecureSync 2400 User Manual

If an output reference is using the GPS or TAI timescale, and the System Time is
set to "UTC", then the GPS Offset box in the Edit GPS Offset window must be
populated with the proper timescale offset value in order for the time on the out-
put reference to be correct. Some references (like GNSS) provide the timescale
offset to the system. In the event that the input reference being used does not
provide this information, it must be set in through the Offsets panel of the Time
Management page.
Since the GPS and TAI offsets have a fixed relationship, only the GPS offset can
be set. If only the TAI offset is known, subtract 19 from it to get the GPS offset.
Output timescales
Some of the available SecureSync outputs (such as the ASCII data module's out-
puts, etc.) won't necessarily output in the same timescale selected in the System
Time's timescale field. These outputs have internal conversions that allow the
timescale for the outputs to also be independently defined, so that they don't
have to be provided in the same timescale.
Other SecureSync outputs will be provided in the same timescale that is selected
in the System timescale field. The NTP output for network synchronization and
the time stamps included in all log entries will be in the same timescale as the con-
figured System timescale. For example, if "GPS" is selected as the System times-
cale, the log entries and the time distributed to the network will all be in GPS time
(time broadcasted directly from the GNSS constellation).
3.2.1.3

Manually Setting the Time

For some applications, it may not be necessary to synchronize SecureSync to a
UTC-based reference. Or, a GPS reference is not available yet (e.g., because the
antenna is not yet installed), but the system has to be setup and tested.
In such cases, the System Time can be hand-set, and then used as a User [x]-set
System Time. For more information on when to use this functionality, see
"User/User" Reference" on
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3 SecureSync 2400 User Manual Rev. 5.2
Note: If the System Time is set to the UTC timescale, and all output
references either use the UTC or "local" timescale, then it is not neces-
sary to set the GPS and TAI timescale Offsets.
Caution: It is imperative to configure any input reference's timescales
appropriately. Otherwise, a System Time error may occur!
page 210.
3.2 System Time
"The
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