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RE: P3D at lunch...



I believe someone from AMSAT-France was working on a soundcard program.
Whoever writes one, I'd be interested in a copy, as all my low speed digital
modes (including 1200 bps packet) are done in software.

Tony Langdon. 
Systems Development and Support. 
ATC Training Australasia.  Level 2 321 Exhibition St Melbourne  3000. 
Phone:  1300 13 1983     WWW:  http://www.atctraining.com.au 



> -----Original Message-----
> From: Phil Karn [mailto:karn@qualcomm.com]
> Sent: Friday, 17 November 2000 13:29
> To: 71611.76@compuserve.com
> Cc: amsat-bb@AMSAT.Org; karn@qualcomm.com
> Subject: Re: [amsat-bb] P3D at lunch...
> 
> 
> If nobody else has already written a PC soundcard demod for P3D 400bps
> telemetry, I suppose it's time that I do it. I see no good reason to
> use customized hardware to do a job that can be done so easily in
> software.
> 
> Anybody know of anybody else having done this? If not, does anybody
> have a good digital recording of a few frames of telemetry that I can
> use for testing?
> 
> I need the carrier somewhere near the middle of the audio passband (so
> both BPSK sidebands fit within the receiver passband), and the
> recording should be linear PCM, *not* RealAudio, MP3 or any other
> compressed format. Ideally the recording should be made directly from
> a receiver, so there's no tape wow or flutter to contend with.
> 
> Thanks!
> 
> Phil, KA9Q
> 
> 
> 
> 
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