[ntp:questions] GPS/PPS and "enable calibrate"

unruh unruh at invalid.ca
Sun Sep 8 05:21:50 UTC 2013

On 2013-09-08, David Taylor <david-taylor at blueyonder.co.uk.invalid> wrote:
> On 07/09/2013 21:30, Horvath Bob-BHORVAT1 wrote:
> Unusually, some GPS receivers (with poorly programmed firmware) have a 

Why not just say it-- Germin GPS 18x receivers had this problem. It is
supposed to be fixed by the latest firmware.

> delay just around or just exceeding one second, which makes 
> identification of the exact second problematical without the correct 
> delay factor being added to the configuration.  There is also the 
> possibility that serial NMEA data is being used without PPS, as it is 
> the best source available, and calibration would be important in that 
> case.  Serial alone can be worse than just using Internet servers, so 
> it's a situation to avoid if possible.

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