[ntp:questions] SNTP with 1ms of precision?

Richard B. Gilbert rgilbert88 at comcast.net
Fri Jun 18 00:10:27 UTC 2010


Marcelo Pimenta wrote:
> 2010/6/17 Richard B. Gilbert <rgilbert88 at comcast.net>
> 
>> Marcelo Pimenta wrote:
>>
>>> Yes!! My question is about ms(MILIsecond) a collegue of this forum said
>>> that
>>> NTP give nsec accurancy... Is impossible to have usec imagine nsec!
>>>
>>> Thanks
>>>
>>>
>> If you have a GPS timing receiver (different from navigation receiver),
>> with a PPS output, one edge of that pulse should be accurate to within 50
>> nanoseconds.  A serial output will tell you which second is marked by the
>> pulse.
>>
>> Getting time into a computer without losing some of that accuracy can be
>> quite difficult.
> 
> 
> Yes, I agree. But we were talking about NTP using Ethernet, so... that's
> impossible
> 

Sorry about that but the thread had lost its original context long 
before I replied!




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