[Elecraft] RE: K2: DSP for CW ? - Curious

[Lyle Johnson]

> ... I don't use the
> denoiser at narrow CW bandwidths, but I am still experimenting with it.

The denoiser is not effective at really narrow bandwidths.  It is more 
effective with wider bandwidths, in which case it can suppress noise and 
let the CW signals pop out of a quieter background.

With a very narrow filter already in place, noise looks more and more 
like a signal because many of its random characteristics have already 
been suppressed.

Think of the denoiser as a filter, looking for "signatures" that look 
like signals.  When it finds one, it builds a filter around that 
frequency and the signal then appears.

If you have already selected a narrow filter, the "denoising" has 
already been done.

73,

Lyle KK7P