[Elecraft] KDSP2-settings for CW use

[Bob Nielsen]

On Nov 23, 2005, at 12:24 PM, Robert Tellefsen wrote:

> Karsten
> To use the NR function on cw, you need to open up the filters.
> The narrower the filters, whether IF or audio, the more noise
> pulses are stretched, and "white" noise begins to sound like
> signal.  Both cases reduce the effectiveness of the NR function.
>
> I find that I get the best results with the IF filter set around  
> 500 Hz
> bandwidth, and the same for the DSP filter.  This gives the NR
> function a chance to work.
>
> So you have a tradeoff between NR versus selectivity.  You have to
> experiment under any given conditions to see which gives you the
> best results.

For those who think this might be a bad tradeoff, remember that  
(thanks to Mr. Boltzmann) the noise power is proportional to  
bandwidth, while the signal power will be generally independent of  
bandwidth.   Therefore, the need for noise reduction is less with  
narrower bandwidths.

73, Bob N7XY