[time-nuts] Re: DIY Low offset Phase Noise Analyzer (Erik, Kaashoek)

[Dr. David Kirkby]

On Fri, 15 Jul 2022 at 23:35, ed breya via time-nuts <
time-nuts at lists.febo.com> wrote:

>
> Unfortunately, powering up the OCXOs and getting their signals connected
> leads to some inevitable ground loops anyway, so you can't always take
> full advantage of built-in isolation, but at least you have it. Try to
> use it when you can.
>
> The rest of the line and low frequency ground loop issues are hard to
> predict, depending on the overall powering and operational setups, but
> some general methods can be applied.
>

Would it not be worth running from NiCd batteries to eliminate PSU noise
and conducted interference as a possible source. I believe NiCd have one of
the lowest noises, bit no doubt Google would help.

I have a couple of high resistance meters (ie basically electrometers). A
lot of the signals in that are optically coupled between boards.

Dave
-- 
Dr. David Kirkby,
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