ScottOn 07/28/2010 01:02 AM, [email protected] wrote:
Hi Scott,
a cool thing to try is to put the unit into manual holdover by issuing the
command
sync:holdover:init
The unit will act as if the GPS antenna has been removed, but GPSCon will
continue to show the 1PPS phase drift against GPS. Thus you can see how
stable your LPRO is over time when the unit is in holdover.
You can restart normal locking with the command
sync:holdover:rec:init
On a good DOCXO, we would see less than 2000ns drift over a day when the
unit has been stable for a week or so. I believe the limits of the time
interval display are about +/- 2000ns.
bye,
Said
In a message dated 7/27/2010 08:42:01 Pacific Daylight Time, [email protected]
writes:
I test it by changing the antenna delay. It should recover within a
reasonable time. Bumping the coarsedac is typically too much change and
takes longer to recover. I run it with a 20ns offset to my z3801a, and
they always stay within 20ns of other.
I've had the Fury running for about 5400 hours since the last reboot,
running v1.21 firmware. It stays within +-10ns, usually it's between
+-5ns. Over 24hrs, gpscon reports TI average 0.15 or so and stddev
around 2.5ns.
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