[ntp:questions] help - clock jumps up to 5000 ms startup ntpd with usb gps linux

David J Taylor david-taylor at blueyonder.co.uk.invalid
Mon Feb 20 07:59:40 UTC 2012

> Well, no. As I understand it, the garmin would issue the nmea sentence
> so that it ended after the second that it referred to ended.

Sometimes after, sometimes before.

> This made
> the simpleminded association of the garmin nmea time with its PPS
> difficult.

If not impossible.

> It however did not stop you from using a say 1.1 sec offset
> to correct the nmea time using the nmea driver.
> Ie, as I understand it, it was solveable by a simple recalibration. (
> unfortunately the pps driver could not do that)

The firmware error rendered the device outside its own datasheet 
specification - i.e. broken.


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