[Elecraft] OT - sound cards

[Don Wilhelm]

Dave and all,

It is my understanding that the bandwidth of the KX3 I/Q outputs will be 
"greater than 40 kHz", but certainly less than the 200 kHz width of the P3.

That fact reduces the sampling rate requirements of the sound card - I 
believe most on-motherboard soundcards will handle the width and 
sampling rate required.  The noise is quite another issue - but 
salvation may be had if the I/Q output levels are line level - the 
soundcard problems for onboard soundcards are magnified when microphone 
levels are mixed with digital noise.

In other words, the KX3 I/Q outputs MAY work just fine with most 
soundcards - the real answers remain to be seen, and are dependent on 
the particular computer soundcard you may have.

73,
Don W3FPR

On 1/9/2012 5:59 PM, David Gilbert wrote:
>
>
> Regarding sound cards for SDR use, certainly the great majority of cards
> out there would have major deficiencies ... most especially for noise,
> but also for dynamic range and sampling rate.  And as you say, many
> don't even have stereo inputs.  N8LP keeps a list of recommended cards
> on his web site with good information on the pros and cons of each.
>
> 73,
> Dave   AB7E
>
>