[Elecraft] K3: DSP NR for Data A mode?

[Bill Frantz]

Is it possible to implement Noise Reduction in the DSP for Data 
A mode? Or is it a really stupid idea?

The PSK software I use -- cocoaModem for the Mac -- has a noise 
reduction mode which works reasonably well when it is receiving 
a broad spectrum signal -- 2 KHz or more. It does not work well 
at all when I narrow the DSP bandwidth to eliminate strong 
nearby signals. This situation leads to the annoying situation 
where I can copy a weak station when the bandwidth is broad, but 
not when I have narrowed it to eliminate strong nearby stations. 
The strong nearby stations overload my SignaLink AtoD converter 
which keeps me from copying the station. It seems to me the DSP 
is in a position to apply noise reduction before the narrow band 
filter, if that is the best way to perform noise reduction.

Cheers - Bill, AE6JV

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