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a strange noise when using chopper mode

Hello Aaronia team,

according to questions which I asked before and the answers, I found out that in the case of using "chopper mode" in IsoLOG DF, I should press the "auto rotate" button.

but when I press that a noise which differs with the main noise level about 30 dB appears. and as soon as I make "auto rotate" OFF, the problem is fixed

Is this usual?

Uploaded files:
  • spectrum_with_autorotate.png
  • spectrum_without_autorotate.png

This is the trigger sector.

Nothing to worry about since it is not used for the DF.


Can you explain a little about this noise. because I may use the raw data of antenna and I want to compensate this noise

Sorry, I cant give you any internals on this.