[aprssig] 9k6 Packet SDR

Denis wb8skp at gmail.com
Thu Mar 13 13:56:29 CDT 2014


Bill,

The dongles BW is about 2.4Mhz.

Denis

----- Original Message ----- 
From: "Bill Vodall" <wa7nwp at gmail.com>
To: "TAPR APRS Mailing List" <aprssig at tapr.org>
Sent: Thursday, March 13, 2014 1:07 PM
Subject: Re: [aprssig] 9k6 Packet SDR


> 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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