[ntp:questions] Frequency Offset

David Lord snews at lordynet.org
Sat Feb 25 10:02:58 UTC 2012


Alby VA wrote:
> On Feb 24, 3:07 pm, Chris Albertson <albertson.ch... at gmail.com> wrote:
>> On Thu, Feb 23, 2012 at 8:59 PM, Richard B. Gilbert
>>
>> <rgilber... at comcast.net> wrote:
>>>>  Thanks. I needed that NTP 101 lesson. So is it a stretch to try and
>>>> obtain a quality motherboard to improve the frequency offset?
>> Even if you were to get a higher quality  crystal it would still drift
>> and you'd need a GPS to keep it "on time".   The only thing you would
>> gain is that the frequency offset would change at a slower rate.   As
>> long as NTP can "keep up" with the rate of drift you are fine.
>>
>> Practically speaking I doubt you could find a better replacement
>> crystal of the correct frequency that would fit in the space.  The
>> double oven crystals that are better tend be be the size of a one inch
>> cube, more or less and certainly not the tiny silver can on your
>> motherboard.
>>
>> Chris Albertson
>> Redondo Beach, California
> 
> 
> 
> 
>  Well, I was thinking you could set the crystal off motherboard and
> then just runs some wiring back to the connection points where the
> crystal would sit. That way shapes and sizes wouldn't really matter.

I'm off out now but somewhere have references to projects
for doing just that. There also the plots of resultant offset
over time that show the marked improvements that were made.


David



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