[time-nuts] Counter Internal Oscillator Importance with External Reference?

[Poul-Henning Kamp]

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In message <60c74d75-41e5-7112-d8b6-721664b895af at rubidium.dyndns.org>, Magnus Danielson writes:

>Indeed. On the other hand some measurements is hard not to do that way.
>One should think about how isolation is created if needed, and this 
>includes AC and DC, common mode and differential mode. Isolation 
>amplifier should be part of the arsenal.

EMI is part of it, but there raw synchronism is a significant
source of systematic errors because the "noise" is no longer
gaussian.

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