Re: [K3] Attenuator and soundcard digital modes

Posted by Guy, K2AV on Jul 06, 2011; 7:10pm
URL: http://elecraft.85.s1.nabble.com/K3-Attenuator-and-soundcard-digital-modes-tp6552276p6555683.html

If NR was available on data, it would be expected to work by the
newbies with endless complaints, even if there were mounds of reports
out there saying why it shouldn't be used. Then the vagaries of
digital operation would be blamed on Elecraft.  Each digital mode has
a specific collection of clean detection tricks that belong in the PC
software, not the K3.  My gut lurch is that NB probably needs to be
X'd out as well.

73, Guy.

On Wed, Jul 6, 2011 at 7:46 AM, Brian Alsop <[hidden email]> wrote:

> Don,
>
> Noise reduction is unavailable for K3 digital modes.  You get a N/A when
> trying to use it.  (If you really want to try it you'd have to use USB.
>  A high potential exists for poor copy with NR on.)
>
> Oddly enough NB is selectable.  I can imagine some of the higher
> settings of NB can likewise scramble copy, though I haven't any data to
> support that.
>
> Attenuator on is a good idea if you (and your sound card) can live with
> the signal strength it produces.
>
> 73 de Brian/K3KO
>
>
> On 7/5/2011 23:39, Don Putnick wrote:
>> After having a less than successful time with PSK31 during the 13 Colonies Special Event, I think I need to learn more about noise reduction. I've read the section in KE7X's manual, but I'm looking for guidance specific to the soundcard digital modes.
>>
>> 1) It appears the K3's attenuator is fixed at -10 dB. Is that the case or is it reprogrammable?
>>
>> 2) What is the collective wisdom on noise reduction for soundcard digital modes: K3 attenuator, K3 noise reduction, PSK31 software noise reduction, some combination of the three, or none at all?
>>
>> Thanks and 73,
>> Don NA6Z K3 #5495
>>
>
>
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