Re: SNR meter, bandwidth and gain adjustment for transverters
jdow
So if you have a signal that features multiple peaks
all about the same amplitude how big is the S-Meter error? Take an
NFM signal modulated by a sine wave. Run up the modulation from
zero until there are three spikes showing within the NFM bandwidth
that are all the same level. What is the correct measurement? One
of the peaks or the proper sum of all three? Now continue running
up the amplitude of modulation into the BFM realms with the signal
spread out over 200 kHz bandwidth. What is the correct S-Meter
reading? Does that reading change when the announcer pauses for
breath? Should it? Mark, I think you went off the cliff on that
one.
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{^_^}
On 20210705 07:43:04,
oldjackbob@... wrote:
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."
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