[ntp:questions] System time ramps forcing step correction?

A C agcarver+ntp at acarver.net
Sun Sep 9 23:01:53 UTC 2012

On 9/9/2012 15:41, E-Mail Sent to this address will be added to the 
BlackLists wrote:
> A C wrote:
>> Has anyone seen a system with GPS/PPS have its system
>>   time ramp/slew ahead by over a second requiring a step
>>   correction?
> Prefer the PPS source?
> GPS time is usually only second relative without the PPS,
>   and will sometimes drift around a lot within the second
>   on non timing GPSes.
>   I have GPS chips on embedded systems that the serial sentence
>    always seems to wander around 20ms to 50ms.

NTP doesn't let me prefer the PPS source (ATOM).  I'm forced to prefer 
some other source and let PPS activate on its own.

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