[ntp:questions] How common is LI=3 - solved.

William Unruh unruh at invalid.ca
Sun Feb 5 20:46:19 UTC 2017


On 2017-02-05, David Woolley <david at ex.djwhome.demon.invalid> wrote:
> On 05/02/17 00:22, Robert Scott wrote:
>>  I hope to achieve a
>> frequency accuracy of 5 PPM.  Once that measurement is made, I store
>> it for subsequent use in my app.

5ppm is not hard if you keep discipling the clock with ntpd/chrony. If
you let it freerun, then things like heat will cause trouble.
>
> The equipment doesn't have a very long service life and is in a 
> temperature controlled environment, as I think both ageing and thermal 
> effects can violate the 5ppm limit.



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