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 <mlich...@redhat.com> 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?

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Miroslav Lichvar

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