[amsat-bb] Decoding AO-85 from IC-910H 9600 data socket - any success anyone?

KO6TZ Bob my.callsign at verizon.net
Sat Oct 10 20:06:01 UTC 2015


So far I have uploaded 276 frames of telemetry using the 9600 port of 
the sub-band on my IC910h.  This is wired directly to the "Line-In" of 
my desk top computer.

  I would not recommend using the "Mic-In" jack, or a laptop computer.  
The 9600 port is used because it offers less filtering of the 0-200 Hz 
of the audio band pass.  This is the portion that is filtered heavily to 
make PL tones sub audible in the radio , as well as remove 60 Hz and its 
3rd at 180 Hz from the microphone input.



Congrats to the AO-85 team!

Trying to decode telemetry using the 9600 output of the sub data (while
radio is in Sat mode) from my IC-910H.  Has anyone been able to do
this?  High elevation passes only?

9600 output is connected directly to mic input.  No isolation
transformers, etc.  Seems like those making progress have gone the SDR
route with IQ data?

Sound card input - 2 channel (L-R channels connected on cable), 24 bit,
48000 Hz

radio - cable to sub band data socket.  9600 bps transmission on. (Is
this for TX only, does not change output and  can be left of?)

AO-85 software

Source - mic input, 4800

start --> no joy,

Suggestions welcome.

Thanks, es 73


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