[ntp:questions] Does this look sane, is PPS working?

Ralph Aichinger ralph at pangea.at
Tue Feb 12 19:03:21 UTC 2013


james machado <hvgeekwtrvl at gmail.com> wrote:
> I would expect to see a PPS line if you have PPS up and working
> correctly, this is what I see on my RPi.

I am using the built-in PPS support of the NMEA driver ("flag1").

> associd=0 status=0115 leap_none, sync_pps, 1 event, clock_sync,
> version="ntpd 4.2.7p347 at 1.2483 Sat Jan 12 07:12:20 UTC 2013 (1)",
> processor="armv6l", system="Linux/3.6.1+", leap=00, stratum=1,
> precision=-19, rootdelay=0.000, rootdisp=500.045, refid=PPS,
> reftime=d4c4e26b.6e1eaad0  Tue, Feb 12 2013  7:46:51.430,
> clock=d4c4e26e.efc5983d  Tue, Feb 12 2013  7:46:54.936, peer=3436, tc=4,
> mintc=3, offset=-0.002504, frequency=23.052, sys_jitter=0.001907,
> clk_jitter=0.000, clk_wander=0.001

So no kern either, seems to work anyway ;)

>> fudge  127.127.20.0 time2 0.384 flag1 1
>>
> 
> You seem to be missing your PPS driver and should have something
> similar to this.
> 
> server 127.127.20.0 mode 16 minpoll 3 iburst prefer
> fudge 127.127.20.0 flag1 0 time2 0.400

You use the driver 20 (NMEA) without PPS (flag1 0) I (hopefully)
use it with (flag1 1).

Thanks! The values from your setup are very helpful, as they
are quite close to mine.

/ralph



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