[ntp:questions] How bad is USB?

David J Taylor david-taylor at blueyonder.not-this-part.nor-this.co.uk.invalid
Sun May 10 07:31:05 UTC 2009


Richard B. Gilbert wrote:
[]
> You can try it and see what happens!  The results may be sufficiently
> good for your purposes.  You will almost certainly not get microsecond
> accuracy.  If you are willing to settle for +/- 10 milliseconds you
> can almost certainly get that.

Richard,

My first tests show within a millisecond or so:

  http://www.satsignal.eu/ntp/NTP-on-Windows-serial-port.html#usb

Caveat: the minpoll is 16s for the USB ref-clock configuration, and 64s 
for the LAN-connect to stratum-1 system.

Cheers,
David 




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