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. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
