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

[Eric Knaps, ON4HF]

Hello,

I also wanted to try decoding the Fox telemetry with my IC-910H without 
any luck. My 9600 data socket was connected to my"mic in" on my desktop 
computer.
Changed to "line in" on my sound card.
Wow! What a difference! On the last pass I decoded 113 frames.

By the way, thanks Bob for the contact on AO-7 a few days ago.

73,
Eric.

Amateur radio station ON4HF
Satellite manager UBA
Member Amsat-NA
Member Amsat-UK
Member Amsat-ON

http://www.on4hf.be

Op 11/10/2015 om 14:57 schreef Bob Mattaliano:
> Bob,
>
> Thanks for the response.  Was using my desktop "mic-in" jack. 
> Soundcard is a built in on my Dell Optiplex 755. Very limited 
> functionality with driver provided, i.e., poor mic input level control 
> and (my) concerns that sub-audible frequencies lost.
>
> So, switched to a cheap USB soundcard (Begringer UCA202) which 
> happened to be on-hand.  Claimed OK down to 10 Hz.  Not fancy, but can 
> input control level.
>
> TADA!  Works!
>
> 73 es tks agn,
>
> Bob
>
> ---------------
>
> From: KO6TZ Bob<my.callsign at verizon.net>
> To:amsat-bb at amsat.org
> Subject: Re: [amsat-bb] Decoding AO-85 from IC-910H 9600 data socket -
>     any success anyone?
> Message-ID:<56196FA9.9050407 at verizon.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Bob,
>
>
> 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.
>
>
> BOB  KO6TZ
>
>
>
> On 10/10/2015 10:30, Bob Mattaliano wrote:
>> Hi,
>>
>> 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
>>
>> Bob N6RFM
>> n6rfm1 at gmail.com
>>
>
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