[time-nuts] OCXO Vref (in)stability plot

Poul-Henning Kamp phk at phk.freebsd.dk
Mon Apr 22 01:58:19 EDT 2013


In message <7d58cf6b-25de-4e7d-9570-e512a22aa0aa at email.android.com>, Didier wri
tes:

>What is the bandwidth of the measurement?

Very low.

The measurements show here are made with an RC lowpass filter (5k/1µF)
on the output, but it doesn't change the statistical properties of
the noise at all.

Settings on the HP3458A (NPLC,NDIG etc) has no effect either.

I suspect it is the oven-power leaking through.


-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
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Never attribute to malice what can adequately be explained by incompetence.


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