On 08/08/2012 22:34, Rick Jones wrote:
[]
Is that unsuitability inherent in USB, so it matters not whether there
is anything else on the USB, or is it more a case of being "bad"
generally only when other things are on the same USB? I'm still
looking to go serial, but was wondering.
[]
Pointers to the fine manual for any of the above would be welcome.
thanks,
rick jones
Rick, judge for yourself. I made a simple comparison between pure LAN
sync, and PPS over USB sync here:
http://www.satsignal.eu/ntp/NTP-on-Windows-serial-port.html#usb
The minimum average jitter value was 110 - 140 µs with the LAN
connection, and 45 µs with the USB/PPS connection. So a USB/PPS
connection may be better than a LAN connection, and most likely much
better than a WAN or Wi-Fi connection. Direct serial/PPS is much better
than USB, though.
--
Cheers,
David
Web: http://www.satsignal.eu
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