- SNR meter, bandwidth and gain adjustment for transverters
Re: SNR meter, bandwidth and gain adjustment for transverters
But S-Meter is not SNR meter. Although the SNR meter
should be approximated from the S-Meter reading.
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On 20210705 13:57:05, Conrad, PA5Y
I disagree, SNR improves as you reduce bandwidth, this is
just physics. If the metering does not reflect this then the
SNR metering is simply wrong. Just use your ears.
Per the info
on Simon's page explaining the operation of the S-meter, "[The
signal level] is the peak spectrum FFT bin (output value)
which is within the current filter."
That page is found here: https://www.sdr-radio.com/s-meter
Simon explains it clearly. There is no correlation of peak FFT
bin value to filter bandwidth (or AGC level, or any other
consideration), nor should there be. Any modern SDR-based
S-meter that changes its reading based on filter bandwidth is
doing it wrong.
I've said it before: Simon got it right, many others are
getting it wrong.
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