> Sure - in the absence of QRM, it's a workable CW signal.
> You can easily set up a simulation with a signal generator and an RMS-
> reading AC voltmeter.
Zero dB S/N is a very workable CW signal for good weak signal
CW ops. Many people can even dig below zero dB S/N if the noise
is "rough" noise.
The reason is noise power is directly related to filter bandwidth, and
CW is a very narrow mode. The brain, if trained properly, makes a
good CW filter. The brain can discriminate against off-frequency
noise as long as it has some type of frequency difference.
If you restrict noise and signal to a very narrow BW, it gets tough
to "filter" in your head because it all sounds the same.
73, Tom W8JI
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