Re: [chrony-users] PPS correction not being applied

[Bill Unruh <unruh@xxxxxxxxxxxxxx>]

On Fri, 24 Feb 2017, Brian Gieryk wrote:

> Bill, PPS is being referenced as GPS now.
>
> Miroslav, that was initial fix.
>
> Now, NMEA offset is +198ms std dev is 7301us

Sounds about right.

> GPS (PPS) is offset +23 us std dev is 19us.

Seems a bit high. But I do not know either your gps or how well the PI
interrupt works.
> Brian
>
> Sent from my iPhone
>
> > On Feb 24, 2017, at 08:48, Miroslav Lichvar <mlichvar@xxxxxxxxxx> wrote:
> >
> > > On Fri, Feb 24, 2017 at 08:44:02AM -0700, Brian Gieryk wrote:
> > > Did as suggested, and seems to be working.  NMEA is showing  +/- 2599 us and GPS (PPS) is showing +/- 1831 us.
> >
> > 1800 microseconds is not that good for a PPS. Usually it's just a few
> > microseconds, or better. What does the "chronyc sourcestats" command
> > print?
> >
> > --
> > Miroslav Lichvar
> >
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