On 6/26/2011 3:52 PM, chipper wrote:
If the ntp client needed to be withing .5 milliseconds of the server,how
could I tell if the jitter and delay were to
much to support this kind of accuracy?
Thanks
Chip
<snip>
Try it! If you are using an NTP server on the internet, it's going to
be difficult. You may find that time quality is excellent between 2300
- 0700 local time and very poor for the remaining sixteen hours!
If you have a GPS receiver, LORAN receiver, etc, you can get time of
very high quality. In particular, GPS sends a pulse per second and one
edge of that pulse is accurate to about +/- 50ns. The rest of the GPS
signal tells you which second is being marked by the specified edge,
leading or trailing (I've forgotten which).
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