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Re: AO40 audio and telemetry



Alan, this AO-40 audio downlink is cool!  I'm passing the link along to my
Dad and some ham buddies. -- Frank wb2bxo@amsat.org

----- Original Message -----
From: Alan K. Adamson <ne1h@highrf.com>
To: <amsat-bb@AMSAT.Org>
Sent: Saturday, May 12, 2001 4:12 PM
Subject: [amsat-bb] AO40 audio and telemetry


> I don't know if it is a useful service or not, but I'll run again the
> telemetry and audio from my station to the web starting tonight at AOS
> Atlanta time.
>
> This last pass, I had over 3000 good CRC packets which was something like
> 78%.  This is a little bit of a misleading number as ao40rcv doesn't count
> the E and most of the command packets and there were a bunch of those as
the
> command team turned on leila etc.
>
> So, the plan for tonight is to start audio feed about AOS (about 3:00z
> 5/13/01 or 13/5/01 for you ROW guys :) ).  I may chase some signals with
> audio at first so if you'd like to hear your downlink  I can probably make
> that happen.
>
> Here are all the numbers....Please coordinate with me on the IRC channel
> #amsat on chatnet.org
>
> Telem will be via the goddard server, ip address 128.183.143.104 port 1024
> audio will be via http://audio.highrf.com:8080 and please enter that in
your
> mp3 player not your browser.  (any mp3 player should work)
>
> You'll need p3t to get the feed from the goddard server.  I don't have the
> link for that handy.
>
> If you'd like to hear your downlink.... please do the math and tell me the
> downlink frequency you'll expect.  I don't have TX ability yet so I
haven't
> figured all of this out.  I'm happy to camp of a freq until we find you.
>
> My downlink seems to be about +2khz to reference so with that and the
actual
> freq, you can come pretty close to calibration on your uplink to downlink
> for yourself.
>
> On my tests today, I ran 5W across 150' of 9913 to a 14.15dbc M2 RHCP
> antenna on 435 and was heard.  Your mileage may vary and squint will
effect
> this as will distance.
>
> I have some general observations to make about RX setups, but, I'll make
> that under separate cover.
>
> See ya on IRC.
> Alan
>
> ps. please let me know if this is of any value... I won't waste the
> bandwidth if it's not.
>
> ----
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