[amsat-bb] ARISSat TLM test WAV file pointer

PA3GUO pa3guo at amsat.org
Mon Aug 8 10:06:16 PDT 2011



this is a test WAV file, and my install of ARISSatTLM is able to decode
9.6MB, 1:45 minutes.

would be useful to place this on www.arissattlm.org

Henk, PA3GUO

Hi Henk.

I've had some issues with decoding BPSK too.  Worked fine on the first day,
then unable to decode anything.
Eventually I reloaded the software and played a wav file through the system.
Finally it began decoding again. I don't really know what the problem was.
It still will not send tlm via the internet and I can't get sound
out...Hence the wav files.

Problem is the wav file I have is large so I cant send it to you to try.
Perhaps some one has 30 seconds worth that does decode, then we can use that
as a standard to check our systems.

I've been tracking doppler by hand. Seems to work OK but it's very important
to keep the CW in the 'blue' window.
I would think jumps would not be good. Perhaps frequent doppler updates.  -
So very small jumps.

I also heard HB9 last night on the transponder, but in low power mode (45
sec)that is difficult. - I'll wait for some daylight passes.

Good luck

David G0MRF

-----Original Message-----
From: PA3GUO <pa3guo at amsat.org>
To: amsat-bb <amsat-bb at amsat.org>
Sent: Mon, 8 Aug 2011 10:41
Subject: [amsat-bb] ARISSat TLM decoding using FCD
Just sharing the results of my recordings of last night:
(using the FCD + HDSDR)


-          FM voice works fine

-          Xponder works fine (HB9AOB was very clear)

-          CW decoding works fine (the Tuning indicator locks on the CW

-          BPSK decoding did not work (I hear & see the signal, but no


Is the BPSK decoding very sensitive to doppler / freq hops ?


Henk, PA3GUO


Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

More information about the AMSAT-BB mailing list