[Elecraft] SDR-IF and I/Q questions

[David Gilbert]

The thread title didn't say anything about being restricted to the KX3, 
and your comment simply stated that you were giving up on SDR in general 
... hence my comment.  Whatever rig you've been having your problems 
with (I assume a K3), it certainly wasn't a KX3.

I'm curious which programs you have tried that didn't have good rig 
control.  Do you include TRX-Pan and NaP3 in that group?  I'm interested 
because those are the programs I intend to try with my K3.   By the way, 
my intended use would be for spectrum display and point/click QSY.  I'm 
perfectly happy to rely on the rig for actual reception, filtering, 
demodulation, gain control, etc.  Your needs may be different than mine.

Dave   AB7E



On 11/14/2011 11:42 AM, Richard Fjeld wrote:
> Well Dave, maybe I am missing something here, but this thread has been
> about the anticipated KX3 and having a Pan-Adapter to use with it.  As I understand
> it, the I/Q leads are being brought out, but not the IF.  So other SDR receivers, or adapters, are not
> needed. Therefore, we are down to finding acceptable software, soundcards, and computers
> to make it work on a par with a P3.
>
> The programs I tried that are not producing mirrored images are lacking good control between radio and software. No 'search and pounce' capability, and time consuming to adjust as the frequency was changed beyond the display width.  Not hardly on a par with a P3. Perhaps there is something out there that I am not aware of. I'll concede that, but if it is a commercial product, I want to exercise 'buyer beware'.
>
> I find PSDR-IF would be a very good match if it wasn't for the mirrored images that fills a crowded
> screen. Thanks to a fine gentleman who sent me this link, it shows I am not the only one
> having this problem.  Go to:
> http://groups.google.com/group/powersdr-if-stage/search?group=powersdr-if-stage&q=image&qt_g=Search+this+group
>
>
> and click on the posts with "image" to see all the posts on this topic.  Many people are having trouble
> with it.  AND, it pretty well identifies the problem.  If it ever gets fixed, we will have something encouraging.  At the speed it is going, it may be only for younger people.
> 73,
> Dick, n0ce
>
> _________________________________

> What specific shortfalls in SDR applications that don't have images lead
> you to conclude they are inferior to the P3?
>
> Also, keep in mind that "SDR" is not completely defined by
> soundcard-based configurations.  Have you considered other
> computer-based SDR front ends like SDR-IQ or QSR-1 before making such a
> blanket assessment?
>
> Dave   AB7E