[Elecraft] KX3 SDR

[James Austin]

Another free online DSP book, that I stumbled upon this evening is Signal
Processing for Communications. I have not gone much past the table of
contents, but it looks interesting.

http://www.signalprocessingforcommunications.org/
<http://www.signalprocessingforcommunications.org/index.html>

<http://www.signalprocessingforcommunications.org/index.html>Jim KA2RVO


On Wednesday, July 27, 2016, tomb18 <tomb18 at videotron.ca> wrote:

> Hi It's not that simple Basically you take the I and q signals, sample
> them with the sound card, convert them to a complex number, pop them  in a
> fast Fourier transform, do a rectangular to polar conversion and then
> calculate the magnitude in dBm.  Then plot them. There's a few more nuances
> but that's the overall idea. Check out the free book on the Internet called
> the scientists guide to digital signal processing.73 Tom va2fsq.com
>
>
> Sent from my Samsung Galaxy smartphone.
> -------- Original message --------From: Enzo Adrian-Reyes <
> enzo.adrianreyes at gmail.com <javascript:;>> Date: 2016-07-27  7:16 PM
> (GMT-05:00) To: Elecraft List <elecraft at mailman.qth.net <javascript:;>>
> Subject: [Elecraft] KX3 SDR
> Hi All
>
> Yes this topic might be a little bit more complicated than the title
> suggest.
>
> So I have the KX3 plugged into the audio input of my computer, and its
> sending quadrature data (IQ) to the sound card, the sound card samples at
> 96Khz.
>
> So my question is how I process this? Yes I know use a piece of software,
> but I am trying to write this, I know the IQ data is coming through down
> and if I use the right process on the IQ data I get base band data out. I
> kind of know that however I dont understand the SDR data coming out, so for
> example and I getting sample of IQ data at freq point Y, or is it  a
> circular buffer arrangement.
>
> I guess what I am saying is, is the IQ data coming from teh KX3 data from
> teh Centre Freq (+/-) the bandwith scope, or just the centre freq + some
> additional side bands?
>
> How are bandwith and sampling rate related? I mean if I am sampling at at
> 96Khz, with a band with of 48Khz does that mean I am only getting 2 samples
> per second at perticular freq??? Or am I getting the entire band of 48Khz
> at 96Khz.
>
> Regards
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