[ntp:questions] How bad is USB?
Uwe Klein
uwe_klein_habertwedt at t-online.de
Sun May 10 10:02:16 UTC 2009
David J Taylor wrote:
> 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
>
Do I see a (sawtoth) beat signal between "true" time and the nominally 1ms
polling interval from the usb bus?
uwe
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