Hi One point worth mentioning - the device will still be quite happy acting as a GPSDO. It simply will not be of much use for NTP (or any other date dependent system).
Bob On Aug 11, 2013, at 7:44 AM, Mark C. Stephens <ma...@non-stop.com.au> wrote: > Azelio, is your Furuno playing up? > > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Azelio Boriani > Sent: Sunday, 11 August 2013 9:30 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Warped back to 1993 > > OK, good, found the bug. Now, iwe wish it were possible to download the > firmware, make the correction and then upload... > > On Sun, Aug 11, 2013 at 1:14 PM, Magnus Danielson > <mag...@rubidium.dyndns.org> wrote: >> On 08/11/2013 05:18 AM, Mark C. Stephens wrote: >>> Okay this is what worked for me: >>> >>> 1. Removed power and antenna. >>> 2. apply power with no antenna. >>> 3. send :GPS:INIT:DATE 2007,08,11 >>> 4. plug antenna back in. >>> >>> For some reason if I used the correct date, the Z3815A warped back to 1993. >>> >>> But I am curious why did this happen today? >> GPS weeks begin on sundays. Today is first day of week 1753: >> >> http://csrc.ucsd.edu/scripts/convertDate.cgi?time=2013+08+11 >> >> Going back 1024 days gives you week 729 day 0, which occurs on 1993 12 26: >> http://csrc.ucsd.edu/scripts/convertDate.cgi?time=1993+12+26 >> >> A simple way to compensate for the lack of bits is to assume wrapping >> occurs, so week numbers lower than som value actually lacks 1024 weeks. >> A trivial code like this fixes this: >> >> if (week < 729) >> week += 1024; >> >> Brilliant until you reach week 1753. >> >> I've seen this happen at 500 and 512. >> >> Cheers, >> Magnus >> >>> >>> >>> --marki >>> >>> -----Original Message----- >>> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] >>> On Behalf Of Mark C. Stephens >>> Sent: Sunday, 11 August 2013 1:06 PM >>> To: Discussion of precise time and frequency measurement >>> Subject: Re: [time-nuts] Warped back to 1993 >>> >>> Hal, I can't get it to take, I keep getting E-350 and the time does not >>> change. >>> Did you unplug the antenna or anything while you changed date? >>> >>> >>> >>> >>> >>> -----Original Message----- >>> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] >>> On Behalf Of Hal Murray >>> Sent: Sunday, 11 August 2013 12:54 PM >>> To: Discussion of precise time and frequency measurement >>> Subject: Re: [time-nuts] Warped back to 1993 >>> >>> >>> ma...@non-stop.com.au said: >>>> A Z3805A, a Z3815A and 58534A integrated timing antenna all think >>>> it's >>>> 26 Dec 1993. >>>> What happened?! _______________________________________________ >>> Is that off by 1024 weeks? (Looks close, but I haven't checked the >>> details.) >>> >>> There is a week field in the GPS data stream. It's only 10 bits. >>> >>> I had that problem on a Z3801A. It did the right thing after I told it the >>> date. >>> :GPS:INIT:DATE 2011,12,26 >>> >>> >>> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.