System Time - Spectracom SecureSync 1200 User Reference Manual

3.2 System Time
SecureSync's time keeping. It is also possible to enter the exact day and time when the leap
second is to be applied, and to delete a leap second.
See also: "Leap Seconds" on page 149
Local Clocks panel
You can create multiple different Local Clocks, as needed. The names of all Local Clocks that
have already been created are displayed in the Local Clocks panel.
See also "Local Clock(s), DST" on page 152.
3.2

System Time

The time that SecureSync maintains is referred to as the System Time . The System Time is used to
supply time to all of the available time-of-day outputs (such as the front panel LED display, NTP
time stamps, time stamps in the log entries, ASCII data outputs, etc.)
By default, the System Time is synchronized to SecureSync's input references (such as GNSS,
IRIG, ASCII data, NTP, PTP, etc.).
If a UTC-based time is not required, however, it is also possible to manually set the System Time
to a desired time/date, or to use the unit's battery backed time (Real Time Clock) as System
Time (with an external 1PPS reference).
The flow chart below illustrates how SecureSync obtains the highest available and valid ref
erence, depending on whether an external source is chosen as reference, or an internal ( User
[x] , or Local System ).
Figure 3-1:
How the System Time is derived
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