[time-nuts] Z3801A gps week rollover
paulswedb at gmail.com
Thu Sep 8 13:20:23 EDT 2016
Right on the pps and frequency. I should have been far more clear date and
I fired up my 3801 and it locked up just fine. Need to check its message to
see whats its putting out.
I will say that I added 2 AA batteries that seem to be lasting for several
years easily and they keep the memory in the GPS engine going and maybe
that keeps the date and time correct so that once you have corrected the
date and time maybe it sticks.
On Thu, Sep 8, 2016 at 1:05 PM, Tom Van Baak <tvb at leapsecond.com> wrote:
> IIRC, we've never heard reports of GPSDO pulse or frequency outputs being
> affected by rollovers. In GPS there are internal rollovers every 1, 256,
> and 1024 weeks but the 1PPS and 10 MHz outputs are not dependent on any of
> these events. The same is true for leap seconds; they may be mishandled by
> some GPS receivers, but they have no effect on 1PPS or 10 MHz outputs.
> ----- Original Message -----
> From: "paul swed" <paulswedb at gmail.com>
> To: "Discussion of precise time and frequency measurement" <
> time-nuts at febo.com>
> Sent: Thursday, September 08, 2016 8:16 AM
> Subject: Re: [time-nuts] Z3801A gps week rollover
> > Mark,
> > From some earlier threads on rollovers. Do you even need to set the time
> > all?
> > Granted not great if the 3801 is a time source, but if its just frequency
> > do you care?
> > Thanks
> > Paul
> > WB8TSL
> > On Tue, Sep 6, 2016 at 11:30 AM, Mark Sims <holrum at hotmail.com> wrote:
> >> Happy until the next power glitch... the setting does not seem to
> >> between boots. There may also be other conditions that causes it to
> >> forget your date.
> >> And when setting the date, you should disconnect the antenna first, then
> >> power on. Once the unit starts tracking satellites you can no longer
> >> the date.
> >> ---------------
> >> > I had one that screwed up. I power cycled and set the date. It's
> >> now.
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