I seem to remember a rollover about then that obsoleted older gps units. On Sun, Aug 29, 2010 at 5:40 PM, Matthew Kaufman <[email protected]> wrote:
> I believe I've found a difference between the faulty units and the working > units... The faulty ones come up as 1/1/1997 when you do :SYSTEM:PRESET, the > good ones come up as 1/1/1998. Does this difference ring any bells for > anyone? > > Matthew Kaufman > > On 6/24/2010 8:41 AM, Matthew Kaufman wrote: > >> I now have *two* Z3801A units which misbehave in the following way (which >> this thread reminded me of): >> >> The GPS status says it acquires quite a few (5-6) satellites with high >> signal strength... then after a minute or two, for no apparent reason, it >> loses *all* of them simultaneously but immediately goes back into >> "acquiring" for the ones it was seeing, and a few seconds later, they're all >> back. During this time, survey (if in progress) is halted and then restarts >> and runs for a bit before halting again when it loses everything briefly >> again. Then, within days, the unit ends up out of lock... if I go check it, >> I see it doing the same thing, and when the satellites are being received it >> is in "fine frequency adjust" mode, but so far off the 1pps phase that it >> really has no hope of re-locking before the next time it drops and then >> reacquires all the satellites. >> >> This is independent of antenna, location, and 48v power source... one unit >> apparently has been this way since I got it, the other worked fine for >> months and then developed this problem. >> >> Without knowing more, I'm thinking it might simply be a bad GPS receiver >> board, thus the idea of trying to find a replacement, perhaps one that is >> better at staying acquired, has crossed my mind. >> >> Matthew Kaufman >> >> _______________________________________________ >> 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. > _______________________________________________ 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.
