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Chapter 5 Command Reference
1 PPS Reference Synchronization
Operating and Programming Guide 5-31
Assessing 1 PPS Quality ________________________
(continued)
This query returns an estimate of the time interval error that can be expected
for a one day holdover, given the current state of SmartClock learning in the
Receiver.
Response
The first number in the response is the estimated time interval error. The units
are seconds, the resolution is 100 nanoseconds.
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 not valid prior to first lock following powerup (see bit 2 of the
Powerup Status Register) or :SYSTem:PRESet. Sending this query before first
lock will generate
error -230
.
This query returns the current time error during holdover operation, given the
current state of SmartClock learning in the Receiver.
Response
The time error units are seconds.
Context Dependencies
This query is valid when the Receiver is in holdover. If not in holdover,
error -230
is generated.
:SYNChronization:HOLDover:TUNCertainty:PREDicted?
RESPONSE FORMAT
Returns an estimate of the time interval error that can be expected
for a one day holdover, given the current state of SmartClock
learning in the Receiver.
±
d.dEe, 0 or 1
:SYNChronization:HOLDover:TUNCertainty:PRESent?
RESPONSE FORMAT
Returns the current time interval error during holdover operation,
given the current state of SmartClock learning in the Receiver.
±
d.dEe