[ntp:questions] Performance of serial-over-USB ref-clock

David J Taylor david-taylor at blueyonder.not-this-part.nor-this.co.uk.invalid
Sun May 10 07:30:30 UTC 2009

David J Taylor wrote:
> Folks,
> Thanks to your help, I got the serial-over-USB GPS NMEA ref-clock
> working with Windows.  It will be interesting to see whether the
> performance is any different to a LAN connection to a ref-clock.  See:
>  http://www.satsignal.eu/ntp/NTP-on-Windows-serial-port.html#usb
> over the next 24 hours.  The change on PC Narvik was at 15:45 UTC,
> Saturday, May 09.
> Cheers,
> David

My conclusion is that there is a substantial improvement over a LAN 
connection, but that connecting via USB is not as good as a direct 
connection (as expected).  Certainly better than not having a reference 
clock.  Please see the page above for details.


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