[ntp:questions] Re: May ntp be off by a second in case of GPSsource?

Bjorn Gabrielsson bg at lysator.liu.se
Fri Dec 30 18:21:29 UTC 2005

hmurray at suespammers.org (Hal Murray) writes:

> >So, can it be stated that NTP (strictly) requires (and will require) such a 
> >GPS receiver?
> It's not "required", but if the device supports it you get much better
> results when you take advantage of it.  Much much better.

PPS pulse yes. But still the serial port message is usually sent after
the pulse. On some receivers the NMEA message is unpredictable - the
jupiter receiver I have is either 1 or 2 seconds late in _NMEA_
mode. Binary mode for the jupiter is flawless. 



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