Re: rewinding a PL-380 antenna


sdwillingham
 

Hi Bill,

--- In ultralightdx@..., "mediumwavedx" <mediumwavedx@...> wrote:
Scott,

Could you tell us how and where the SNR figure is measured for
display? Does the RSSI value work into it, or is it derived
from audio output?
The SNR figure is calculated by a proprietary DSP algorithm, and
neither the RSSI nor audio output directly play a role. The
input to the algorithm is the filtered IF signal before audio
demodulation. It is really more of a carrier-to-noise ratio
than directly an audio noise measurement. Obviously, in AM it
is bounded between 0 and 25 dB. The motive for computing and
providing the number comes from implementing better station
search capabilities; the display is just a nice byproduct.

-Scott-

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