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Re: K3: DSP NR for Data A mode?

Posted by N5GE-2 on Jul 20, 2012; 5:43pm
URL: http://elecraft.85.s1.nabble.com/K3-DSP-NR-for-Data-A-mode-tp7559524p7559536.html


Have you tried using a narrower filter in the K3 or using the K3 NR?

Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member

On Fri, 20 Jul 2012 09:03:20 -0700, Bill Frantz <[hidden email]> wrote:

>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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