Symmetricom 5071A, Operating And Programming Manual

Page: 39 / 194

Chapter 1 Getting Started
Performing Basic Tasks
Operating and Programming Manual 11
While the sync input is armed, all 1pps outputs and the clock display are stopped.
These resume on synchronization or within 1.5 seconds, whichever occurs first.
If no sync pulse is captured within 1.5 seconds after arming, the selected sync
input is disarmed, and the instrument's LCD display shows: Sync timed out.
Setting Time and Date
To Set Time
1 Press Shift , then 8 (Set Clock).
2 Set 24-hour time
3
(numeric keys), then press Enter : the time displays increment
immediately.
3 Press

to select the Display ON/OFF field, then press Inc to turn on the Display.
To Set Date
1 Press Shift , then 8 (Set Clock).
2 Press

twice to select the DATE field.
3 Enter the Modified Julian day
3
with the numeric keys.
4 Press Enter .
The new date is shown in the LCD display.
Always synchronize the 1pps pulse outputs before setting time and date, otherwise the
clock may display incorrect time/date information.
Powering Down the 5071A
When removing power from the 5071A, you'll need to disable the internal-standby
battery. (Note: 48V option does not have internal-standby battery).
If the 5071A is used in a system or operation where power is removed on a daily or more
repetitive basis, it is strongly recommended that the internal standby batteries be
physically disconnected (this step is not required for 48V option instruments). This will
prevent excessive discharge/recharge cycles from prematurely depleting standby capacity.
Refer to page 28 for the information on how to disable the internal-standby battery.
3
See pages 19 and 20 for information about the Modified Julian Day (MJD).
NOTE