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Chapter 5 Command Reference
1 PPS Reference Synchronization
Operating and Programming Guide 5-33
Assessing 1 PPS Quality ________________________
(continued)
This query returns the duration of the present or most recent period of
operation in the holdover and holdover processes. This is the length of time the
reference oscillator was not locked to GPS. The time units are seconds.
Response
The first number in the response is the holdover duration. The duration units
are seconds, and the resolution is 1 second.
If the Receiver is in holdover, the response quantifies the current holdover
duration. If the Receiver is not in holdover, the response quantifies the
previous holdover.
The second number in the response identifies the holdover state. A value of 0
indicates the Receiver is not in holdover; a value of 1 indicates the Receiver is
in holdover.
Context Dependencies
This query is always valid. If this query is sent before the first holdover has
occurred, the response will be 0,0, indicating that the Receiver is currently not
in holdover and last holdover duration was 0 seconds (user infers there has not
been one yet).
Set to 0,0 after a :SYSTem:PRESet. If there was a prior holdover, the duration
will be lost.
:SYNChronization:HOLDover:DURation?
RESPONSE FORMAT
Returns the duration of the present or most recent period of
operation in the holdover and holdover processes.
±
d.dEe, 0 or 1