Chris Cox wrote:
> Dave wrote:
>> I have a requirement where I need two Suns (both Netra T1s) to have
>> their clocks close to each other during an experiment that lasts 4
>> hours. During this time, neither Sun will have internet access and
>> they will not be networked to each other.
>
> Ick.
>
>>
>> I suspect if I sync them by NTP before the experiment starts, then
>> they will not drift by more than 500 ms over a 4 hour period. Does
>> that seem reasonable? Has anyone actually ever made medium term (few
>> hours) stability measurements of the clocks in Suns?
>
> It's possible... but too many variables.
>
> If there was some way to sync to a local "accurate" clock for each
> that would help. I know that's not much help.
>


That is a possibility. I have one of these


http://www.thinksrs.com/products/PRS10.htm

which is a rubidium oscillator. I could get another and sync them both
to GPS. A bit more complexity than I wanted, but it might be necessary.