[amsat-bb] Decoding AO-85 from IC-910H 9600 data socket - any success anyone? -- Success!
Eric Knaps, ON4HF
on4hf at telenet.be
Mon Oct 12 19:26:48 UTC 2015
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
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.
Amateur radio station ON4HF
Satellite manager UBA
Op 11/10/2015 om 14:57 schreef Bob Mattaliano:
> 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,
> 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
> 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:
>> 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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