Hi > On Dec 1, 2014, at 11:47 AM, Paul <[email protected]> wrote: > > On Mon, Dec 1, 2014 at 11:15 AM, Graham <[email protected]> wrote: > >> It has been less than 18 hours since I powered them up so I am not yet >> wondering why the the REF-0 LED's are in the state they are as I have seen >> reports of others having to wait 24 hours or so before every "locks in". > > > > There are differing states. My pair went OK+Standby in about 10 minutes > but they're not "stable" at that point. > > Here's a log snippet: > > Log 019:20141128.00:00:00: Power on > Log 020:20141128.00:00:26: Power settings ok, Int: 17 dBm, Ext: 17 dBm > Log 021:20141128.00:52:21: Position hold mode started > Log 022:20141128.01:28:32: GPS reference valid at 20141128.20:34:00 > Log 023:20141128.20:35:04: Locked mode entered > Log 024:20141129.10:35:03: Ready for 4 hour flywheel > Log 025:20141129.16:35:03: Ready for 8 hour flywheel
Checking the log from time to time is a very good idea. > > > The first timestamp after power-on is 00:00 of the last valid date prior to > power-off. Until it gets GPS lock, the time stamps can be pretty confusing. > I assume the deltas are correct. So 1:29 to Locked and 20 more > hours to "stable". Holdover uncertainty continues to decrease for many > more hours. It decreased from hundreds of microseconds to 3 at the time of > that log and is now at 900 nanoseconds. The holdover uncertainty numbers on these are every bit as “interesting” as the numbers the Z3801 puts out. Fun to watch. I would not count on them being correct. Bob > _______________________________________________ > 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. _______________________________________________ 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.
