Re: [amsat-bb] successes with P3T.exe and AMSAT/TAPR DSP-93 andTAPRDSP56002EVM tests

[Roy Welch <rdwelch@xxxxxxxxxx>]

I agree with Mark's comments.  The only difference here was that I tape
recorded the WAV files and played them back into my DSP-93 to decode them. 
I did that only because the connecting cables I have already here fitted
that scheme.

"Mark L. Hammond" wrote:
> 
> Hello all,
> 
> I'd like to share some reports of success with Stacey's recently release
> P3T telemetry program.
> 
> I have been able to play a P3D audio wave file into both my AMSAT/TAPR
> DSP-93 and TAPR DSP56002EVM units and decode the data :-)
> 
> Below are two rather big (256k) .jpg files from desktop snap shots showing
> the data decoded with both units.  (They are 1280x1024, so you 640x480
> desktop users will be moving around a lot.)
> 
> http://camel.campbell.edu/~hammond/ham/p3d/p3t_dsp93.jpg
> 
> http://camel.campbell.edu/~hammond/ham/p3d/p3t_evm.jpg
> 
> Basic setup is to play the P3D audio wave file with my sound card/Windows
> Media Player into either DSP unit with P3T running.
> 
> The only caveat I have found is that the DSP-93 runs at 1200 baud serial
> out, while the DSP56002EVM runs at 57600 out (as I have it
> configured).  The program P3T seems to work at both serial speeds, but I
> had to EXIT the P3T program after changing the serial speeds, so pay
> attention to that detail if you are messing with serial port speeds as I
> have been doing.
> 
> As far as I can tell, the units are decoding the data the same.  They are
> either both right, or both wrong ;-)  I prefer the former!!
> 
> Currently, I have the following ready for the launch:
> 
> DSP-93 running 400 bpsk decoder
> DSP56002EVM  running 400 bpsk decoder
> DSP56002EVM running 9k6 raw telemetry decoder
> 
> Now, if I only had orbital elements and a real signal on a known frequency,
> I'd be set!
> 
> Great job by the DSP programmers that wrote the 400 psk code, and Stacey
> for releasing P3T soon enough for some testing before launch!   Many, many
> thanks.
> 
> These are exciting times indeed.
> 
> 73,
> 
> Mark L. Hammond  [N8MH]
> 
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-- 
73, Roy

Internet: w0sl@amsat.org
Home Page: http://home.swbell.net/rdwelch
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