[volt-nuts] Practical power supply noise testing

Poul-Henning Kamp phk at phk.freebsd.dk
Fri Jul 1 17:25:33 EDT 2016

In message <2656F010-8E12-4BAD-B9AE-713CEFEE1B0A at febo.com>, John Ackermann N8UR writes:
>I have several supposedly low noise bench power supplies that I want to check out.  They seem to work well but are quite old, so of course one wonders about the caps, etc.
>Can someone suggest a practical test regime to verify power supply
>DC noise performance?  Preferably one that doesn't require building
>up custom low noise amps?

Listen to them ?

All the "hard" noise is in the audio-range, so a series capacitor
a low-noise amp and a pair of headphones...

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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