[aprssig] 9k6 Packet SDR

Bill Vodall wa7nwp at gmail.com
Thu Mar 13 13:07:50 CDT 2014


On Fri, Mar 7, 2014 at 6:00 AM, John Langner WB2OSZ <wb2osz at comcast.net> wrote:
> Dire Wolf version 1.0 has two types of "software audio cables" for use with
> gqrx and rtl_fm.


Still thinking about how cool this is going to be - decoding 9600
packet at a wide range of frequencies with the HDTV dongle SDR.   Hope
to get to try it soon.

A couple more ideas...

* It will probably possible to create a CD or file image of raw data
(audio) captured off the air.    Does anything like this currently
exist for testing?   A stock sound card setup probably won't work as
it doesn't have the bandwidth and discriminator audio.   Capturing
from the RT dongle should work???

* The next step - if we can decode 9600 packet from a dongle - why not
19200?   The Kantronics data radios would generate that.   Why not
56K?   More?   What is the bandwidth limit of the dongle receivers?
Since they're for TV I'd image it's 6 MHz...

Bill, WA7NWP


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