This is a known problem for old GPS receivers, refer to this URL: <http://www.leapsecond.com/notes/gpswnro.htm> to learn more or search the Internet with the words "GPS week number rollover".
On Mon, May 4, 2015 at 12:43 PM, Chris Mottram <[email protected]> wrote: > Hi Bob, I've just this minute joined this list, because I Tymserve 2100 unit > we have at work has just started doing the same thing, at just gone 1am UT > on May 3rd. I've also tried restarting and power cycling (this is somewhat > convoluted as the unit is ~3000 miles away from me) but it's firmly stuck in > 1995 > > Ours is currently running Rev 3.1 : > 5 ? version > Boot Code - Tymserve_2100 > Rev 1.1 12/20/1996 13:07:21 > Main Code - TymServe_2100 > Rev 3.1 08/22/2002 12:15:37 > > After a power cycle, our unit comes up as follows: > 3 ? time > JAN 01 1995 00:01:53.687252 > After the GPS has locked this changes to: > 5 ? time > SEP 17 1995 20:14:35.479915 > Where 20:14 was the correct UT time. > > cheers > > Chris > > > On 05/04/2015 12:31 AM, Bob Martin wrote: >> >> My Tymserve 2100 gps unit (Rev 4.1) thinks it's 1995 -- September 17, >> 1995. >> >> But a restart (connect via telnet and give the commands util restart) >> brings it back to the correct time and date -- for a while? I haven't caught >> it dropping back, so i don't know if it's doing this on the hour, after an >> hour, or what, but I noticed it last night, and I've restarted it a few >> times today. >> >> Any clues? >> >> I know about the off-by-a-second issue with the pending leap second. This >> one is more interesting! >> >> So far I've just been issuing software restarts. The next time I'll power >> cycle the sucker and see if that does any good. >> >> GPS signal isn't the issue; the 2100 shares an external GPS antenna with >> my Thunderbolts through a Symmetricom 58536A GPS splitter, and the >> Thunderbolts are as happy as a Thunderbolt can be. >> >> cheers >> >> bob k6rtm >> >> >> _______________________________________________ >> 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. >> > > > -- > ----------------------------------------------------------------------------- > Chris Mottram | > Liverpool Telescope Programmer. | > Liverpool John Moores University, | email: [email protected] > Astrophysics Research Institute, | phone: (0151) 904 6591 > IC2, Liverpool Science Park, | mobile: 07778650412 > 146 Brownlow Hill, Liverpool, L3 5RF | www: www.astro.ljmu.ac.uk > ------------------------------------------------------------------------------ > > _______________________________________________ > 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.
