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Technical Topics => SDR - Software Defined Radio => Topic started by: desmoface on February 27, 2013, 0312 UTC

Title: Do you think this would work?
Post by: desmoface on February 27, 2013, 0312 UTC

Hey everyone, I stumbled upon this video and started thinking tha this would work with my ts-870, as it has an i.f. Out (at 8.83, via an rca connector).  I downloaded the isdr app on my ipad, and it appears that all i'd have to do is get the camera kit, and the griffin i-mic.

My question is, am I feeding the if out into the i-mic, or audio from the rcvr?  Anyway, here's the video:

http://www.youtube.com/watch?v=qUHbPZztkiY

I notice that there arent many options to get the spectrum display for my imac, so this may be the next best thing.

Thanks for any advice.

Steve

Title: Re: Do you think this would work?
Post by: ChrisSmolinski on February 27, 2013, 1239 UTC

I assume the Elecraft KX3 outputs an I/Q signal down in the audio range, which is why it works.

You can't feed an 8.83 MHz IF output into a sound card input. (Plus, it is not I/Q data) What you need to two is convert it to I/Q data at a lower frequency. I believe this may be what you're looking for: http://www.wu2x.com/sdr.html

BTW - The SdrDx app for Mac OS X does work with sound card SDRs, so you could use that, rather than the iPad. (But again, not with your RS-870)

SdrDx: http://fyngyrz.com/?p=915

Title: Re: Do you think this would work?
Post by: desmoface on February 27, 2013, 1338 UTC

Hmm...It says you have to have a network server application, I'm not really sure what that is.  That does look pretty good, though.  I was hoping it would be an easy setup as I'm not really technically savy when it comes to puters.  I'm more of a plug and play type, LOL.

It appears that most of the software is for pc's, I prefer to stay with my mac.  Oh well, I'll keep researching a bit more.

Thanks for the info, Chris.

Steve

Title: Re: Do you think this would work?
Post by: ChrisSmolinski on February 27, 2013, 1408 UTC

Quote from: desmoface on February 27, 2013, 1338 UTC

It appears that most of the software is for pc's, I prefer to stay with my mac.  Oh well, I'll keep researching a bit more.

SdrDx works great with the Mac, and with SDRs that follow the RF Space interface. (Also with sound card based SDRs and the FCD Fun Cube Dongle although I have not tried that)