S meter calibration for transverters 144/432Mhz

Bojan Vukosavljevic

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Jun 5, 2025, 1:15:07 PMJun 5

to Radioberry

Is it possible to manually calibrate the S meter?

Thank you.

transverter.jpg

Bojan Vukosavljevic

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Jun 5, 2025, 5:33:45 PMJun 5

to Radioberry

Sorry, I posted in the wrong group :(

чет, 5. јун 2025. у 19:15 Bojan Vukosavljevic <bvdm...@gmail.com> је написао/ла:

Is it possible to manually calibrate the S meter?

Thank you.

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qrp73

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Jun 5, 2025, 8:32:05 PMJun 5

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These are different values. S-meter value is calculated as a total power over receiving bandwidth. While noise floor on FFT spectrum is calculated as a power for single bin bandwidth which is about Fs/fft_size. So the noise floor level depends on selected FFT size, which S-meter depends on selected receiver bandwidth.

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