[time-nuts] SMD TADD-1 distribution amplifier - seeking comments and suggestions?

Poul-Henning Kamp phk at phk.freebsd.dk
Thu Dec 17 17:22:20 EST 2015


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In message <CAPnVNRVsvdM+xb6rove8zU4sR1RjBLe+tahWcVyDNcWPhPWiMQ at mail.gmail.com>, Anders Wallin writes:

>My 'ultra-low-noise DC-supply' in the form of a lead-acid battery improves
>things somewhat, but some spurs still remain:
>http://www.anderswallin.net/wp-content/uploads/2015/12/2015-12-17_fda_spurs_and_comments.png
>interpretations and explanations are welcome!
>The board was not enclosed in a metal can for these tests.

Isn't that the explanation ?

Any SMPS in the vicinity is going to show up...


-- 
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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