[ntp:questions] NTP with a Serial PPS

elio.gi at gmail.com elio.gi at gmail.com
Fri Sep 28 12:50:35 UTC 2007


Hi to all.
I've succeeded to work NTP with the PPS.
My error was that although I had reconfigured and recompiled the ntp
4.2.4p4 I have to start daemon in the installation path of ntpd. It's
strange, 'cause when I type "version" in the ntpq shell it report to
me the correct version.
If I execute "ntpd" from the local (right) path the line appear to me:
     remote           refid      st t when poll reach   delay
offset  jitter
==============================================================================
*SHM(0)          .PPS.            0 l   13   16  377    0.000
0.009   0.001
xmchm932a.siemen 139.25.228.79    3 u    2   16  377   17.916
-20.608   5.359
+blns064x.bln.sb .GPS.            1 u    4   16  377   28.944
-1.512   0.652
+mhpa6hjc.mch.sb .PPS.            1 u   18   16  376   18.178
-0.039  66.899

So SHM is working good.

Thanks to all,
and if someone would ask me something...please don't esitate to do
it !

I' ve also other doubts , but now I'm measuring the quality of this
system.
Kind regards.
Elio.


On 27 Set, 19:31, cmad... at hiwaay.net (Chris Adams) wrote:
> Once upon a time, Elio <elio... at gmail.com> said:
>
> >1) Could you copy the content of your ntp.conf file?
>
> server 127.127.20.0 mode 2
> fudge 127.127.20.0 time1 0.7 refid GPS
> server 127.127.28.0 minpoll 4 maxpoll 4 prefer
>
> >2) Have you installed some drivers for NMEA on your linux pc? (If yes,
> >have you recompiled your kernel?)
>
> No.  NMEA is a protocol spoken over regular serial ports.  The ntpd
> driver just opens the serial port; /dev/gps0 is symlinked to
> /dev/ttyUSB2.
>
> >3) Could you copy your shmpps command that you execute in order to run
> >this software?
>
> hm_splc2 -d /dev/gps0 -s -u 0 -l DCD
>
> --
> Chris Adams <cmad... at hiwaay.net>
> Systems and Network Administrator - HiWAAY Internet Services
> I don't speak for anybody but myself - that's enough trouble.





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