[Elecraft] SDR_Sound_Cards

[k3ndm at comcast.net]

Tony, 
You are correct. However, I think you missed my point. The discussion has been concern over using cards that are capable of a 192KHz sample rate. My point was, maybe stated badly, was that shouldn't be a consideration as Elecraft was saying you really should stay at 48KHz, but 96KHz would be just OK . I was not trying to get into a Nyquist discussion. 

I think the concern has been the ability to see the entire spectrum of the ham band being used. And, I was trying to say that you will see it, just 48KHz at a time, software controlled. If the recommendation is to steer away from the 192KHz. bandwidth, consideration of a 192KHz. capable card is kinda mute. Go for a card that has high linearity and low internal noise, and some of those do not go to 192KHz. 

73, 
Barry 
K3NDM 

----- Original Message -----
From: "Tony Estep" <esteptony at gmail.com> 
To: elecraft at mailman.qth.net 
Sent: Friday, August 31, 2012 3:29:22 PM 
Subject: Re: [Elecraft] SDR_Sound_Cards 

On Fri, Aug 31, 2012 at 11:42 AM, Barry LaZar <k3ndm at comcast.net> wrote: 

> ....if you opt to use NaP3 and 
> set it so that what you are tuned to is in the center of the display, 
> you will always see the +/- 24KHz.... 

============== 
The amount you see is selectable. It depends on the sampling rate as set by 
the sound card, the sampling rate set in the NaP3 Setup page, and the width 
selected on the NaP3 display. If you have a 192K card, you can see up to 
+/- 96K, or as little as +/- 3K. 

Tony KT0NY 


-- 
http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 
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