[ntp:questions] Maximum time2 fudge value for NMEA refclock?
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 220.127.116.11 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:
> 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.
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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