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Did you performed CAL RESET before screenshot?

Yes, and also disabled CAL-CORRECTION

It looks not good. With such hardware you may have worse dynamic range.

Yes, Hugen warned of such, but note SCALE is 12dB/div with 0db at 8
I have been going to run some noise abatement experiments.

It looks that original hugen79 hardware has really better performance.

"...they [clones] have failed to understand the role of bridge and shielding,
and made some bad modifications to facilitate manufacturing."
/g/nanovna-users/message/158