Arbiter Systems 1092A, Operation Manual, Page: 55 / 214

7.5 Setting Out of Lock 37
7.5 Setting Out of Lock
Use the “Set Out of Lock” feature to control how the clock responds to an out-of-lock condition.
Out of lock means that the GPS receiver in the clock is no longer tracking any satellites and that
the time may drift according to characteristics of the internal clock and environmental conditions.
Adjust these settings so that, in the event of an out-of-lock condition, you will be notified in a
reasonable amount of time. The default setting is for the clock to alarm after being unlocked for
a period of one minute. Unlocked indications include the red unlocked LED being ON, and the
optional out-of-lock relay (Option 93) switching to the unlocked, or faulted, condition.
For RS-232
command, see Section 10.2.14 .
“Extend Relay Start” increases the time for the clock to change from an unlocked to a locked
indication, thereby increasing clock stability at startup. Normally at startup, the clock waits until
the GPS receiver is tracking at least four satellites before it will indicate that the signal is accurate
and changes to a Locked” condition. To extend the out-of-lock indication for a few minutes longer,
select “Yes” to the selection, “Extend Relay Start.”
SET OUT-OF-LOCK?
ENTER
SETUP
SET OUT-OF-LOCK?
LOCK TIME = 01 Min
LOCKTIME = 99 MIN
|
LOCKTIME = 01 MIN*
ZERO DELAY UNLOCK
UNLOCK OFF
* = Default setting
DOWN
UP
EXTEND RELAY START?
UP = YES DOWN = NO
DOWN
UP
ENTER
Figure 7.6: Out-of-Lock Setup