[ntp:questions] Maximum time2 fudge value for NMEA refclock?

Rhys user at mailinator.org
Tue Jul 20 08:59:34 UTC 2010

In article <i23c61$uqr$1 at news.eternal-september.org>, david-
taylor at blueyonder.co.uk.invalid says...
> "jimmyterrence" <jimmyterrence at gmail.com> wrote in message 
> news:a8402956-55da-4990-bf95-42a7a26419aa at c10g2000yqi.googlegroups.com...
> []
> > I'm in the process of compiling on a Debian Lenny system that
> > I had as a spare. I want to see if my problems carry over to a
> > different machine. If it still doesn't work, I might try a FreeBSD
> > install. I've played around with FreeBSD before, but not to try and
> > set up a pps source.
> As a non-FreeBSD person, I put up my simple notes on two versions of 
> FreeBSD here:
>   http://www.satsignal.eu/ntp/FreeBSD-GPS-PPS.htm
> with more references to notes from others as well.  If they help, great. 
> If they show me as a FreeBSD novice, that's spot-on.
> Cheers,
> David 

I'm amazed it quickly converges, using separate NMEA and PPS on mine, 
with the correct offset, and correct drift file, its an hour or 2 before 
it finishes going 500ppm/step/500ppm/step.

Running around 600ms offset now, I charted it against PPS, and it looks 
roughly like 560-640 ms, slowly going back and forwards across the day.

Using combined NMEA and PPS it just ignores the NMEA until the PPS is 
working, but thats not as self-sufficient as i'd like.

Thanks for your notes on Freebsd stuff, helped a lot setting it up.

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