On 29/12/2013 23:51, Adrian P wrote:
[]
Now I am wondering if there is any other way to see if the PPS signal
is used or not... maybe with some debugging?
Adrian
Adrian,
Does the ppstest work? That shows whether the hardware is connecting
properly, and that PPS support is present. Yes, I see from your earlier
post that it does work. But try ppstest as ppswatch - see how close the
the second edge you are.
If so, what are the relevant lines in your ntp.conf?
You should be seeing one line of output from ntpq -pn for each of the
configured servers. However, checking on my FreeBSD system shows that
the NMEA driver can produce PPS sync directly, without having to add the
atom driver.
I see that you have:
server 127.127.20.0 mode 1 minpoll 4 maxpoll 4 prefer
fudge 127.127.20.0 flag1 1 flag2 0 flag3 1 refid PPS
I have:
server 127.127.20.1 mode 0 minpoll 4 maxpoll 4 prefer
fudge 127.127.20.1 flag1 1 flag3 1 refid PPS
I'm not sure whether it matters which sentence you choose to process -
it seems that I'm using mode 0 - $GPMRC. I would see whether altering
flag3 to 0 makes any difference, as there was a discussion about the
polarity of that flag.
Just a few things which you can try easily.
Yes, ntpd can be run with debugging, but that's rather outside my expertise.
--
Cheers,
David
Web: http://www.satsignal.eu
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