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Re: AO-40 high-speed telemetry?



Richard,

Well I was ready, and I'd modded my TNC too! Only to find that the 70cm
downlink wasn't there.

I vaguely remember from James' talk at the colloquium that this mode would
only be there for a short while (maybe 24 hours) before the IHUs were booted
into their normal modes. So maybe we'll never hear what it sounded like
during takeoff. Probably quite loud. Maybe the Microphone's front end blew.

Cheers, Howard G6LVB


----- Original Message -----
From: "Richard W L Limebear" <Richard@g3rwl.demon.co.uk>
To: <amsat-bb@AMSAT.Org>
Sent: Sunday, November 19, 2000 9:29 AM
Subject: Re: [amsat-bb] AO-40 high-speed telemetry?


> "John P. Toscano" writes:
>
> > While crusing the AMSAT-UK web site today
>
> Nice to know someone looks at it :))
>
> > No one has
> > yet (to my knowledge) heard the 70cm beacon or received 9600 bps
> > FSK data from AO-40.
> snip
> > but I can't help wondering if there is actually
> > a malfunction that hasn't been announced.
>
> My thoughts exactly. The "in-flight entertainment" was something that 'RUH
> was intensely interested in. Must be a good reason that the 9k6 isn't
> coming down.
>
> BTW: I saw several comments from folks about slight instabilities in the
> frequency. If anyone notices these around perigee then its probably that
> the s/c is magnetorquing - when AO-13 was magnetorquing the beacon often
> burped on each torque firing. (Guess: torquing needs a high-current pulse
> so buss voltage drops on each pulse.)
>
> > Anyway, "the whole world is watching", so any official tidbits of info
> > that the flight team can drop our way in between all their other busy
> > activities would be greatly appreciated!
>
> Amen
>
> 73
> Richard W L Limebear G3RWL
> g3rwl@amsat.org
> FOC # 1188
>
>           So many beautiful girls ..... (sob) so little time
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