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Author Topic: Help - thread where replacing cheap caps in SMPS improved analyzer noise floor  (Read 349 times)

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Offline EE-diggerTopic starter

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Help - thread where replacing cheap caps in SMPS improved analyzer noise floor
« on: September 06, 2024, 04:44:06 am »
Searching for an hour and need help.

I'm sure it was for a Siglent spectrum analyzer but by replacing a handful of cheap capacitors in the SMPS, the noise floor of the instrument was improved, most noticeable as the frequency increased.

Searched by key words, looked for the photos of the removed caps ... NADA  :horse:
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Offline EE-diggerTopic starter

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Re: Help - thread where replacing cheap caps in SMPS improved analyzer noise floor
« Reply #1 on: September 07, 2024, 05:27:15 pm »
The thread I'm looking for had photos of a handful of cheap, replaced capacitors in the Siglent or Rigol instrument.  The noise floor improved with frequency with the new caps.

Cannot find it  :palm: :palm:
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Offline EE-diggerTopic starter

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Re: Help - thread where replacing cheap caps in SMPS improved analyzer noise floor
« Reply #2 on: September 07, 2024, 09:04:09 pm »
Found it.  The thread was on the Rigol RSA5000 and had w/wo images of the noise floor improvements.
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