[ntp:questions] timing issue with a HP 58534A

Mark C. Stephens marks at non-stop.com.au
Mon Feb 6 13:50:46 UTC 2012

This is probably the wrong question to ask, but anyway, I have flag1 1 for refclock 20 in my config.

Under freebsd how do I verify it is using PPS timestamps?

Many thanks,

-----Original Message-----
From: Dave Hart [mailto:hart at ntp.org] 
Sent: Tuesday, 7 February 2012 12:14 AM
To: Mark C. Stephens
Cc: questions at lists.ntp.org
Subject: Re: [ntp:questions] timing issue with a HP 58534A

On Mon, Feb 6, 2012 at 13:06, Mark C. Stephens <marks at non-stop.com.au> wrote:
> Yes, GPZDA is doing the trick.

Glad to hear it.

>> Which NMEA sentence is the Windows ntpd showing in ntpq clockvar (cv) output?
> GPGGA I kid you not, it's in clockstats...

Assuming the quality indicator in clockstats is 0, that sounds like a bug in ntp-dev's refclock_nmea.c, which was substantially rewritten compared to the 4.2.6p5 code.  I just reviewed it and by my reading it should be rejecting 0 and accepting anything else.  Please file a bug report if that's not what you see with 4.2.7.

Dave Hart

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