[amsat-bb] Fox -1B / AO-91 in trouble?

[Burns Fisher]

Looks much better all right.  If cycling the  IHU fixed it, that does imply
it was an IHU problem, although we could have guessed that the tx was ok,
since we were getting telemetry ok.  Since the IHU cycled ok, that implies
that it was not the program memory.  Given that we got telemetry in idle
and for a few seconds after the transponder went off, that means a lot of
stuff was ok.  I'm guessing that probably some bits got flipped in the data
for the software high pass filter, which would explain why there was trash
in what should have been the telemetry audio frequency band (below 200Hz).

73,

Burns WB1FJ
AMSAT Fox Software

On Tue, Apr 30, 2019 at 12:17 PM Andrew Glasbrenner via AMSAT-BB <
amsat-bb at amsat.org> wrote:

> I cycled the power to the IHU and it popped right back the way it should
> be.
> Should be fine now, but reports for the next day or two will be
> appreciated.
>
> 73, Drew KO4MA
> AMSAT VP Operations
>
> -----Original Message-----
> From: AMSAT-BB <amsat-bb-bounces at amsat.org> On Behalf Of Andrew
> Glasbrenner
> via AMSAT-BB
> Sent: Tuesday, April 30, 2019 8:11 AM
> To: amsat-bb at amsat.org
> Subject: Re: [amsat-bb] Fox -1B / AO-91 in trouble?
>
> My first pass is just after noon. If it hasn't self-corrected by then, I'll
> try a reset.
>
> Drew
>
> -----Original Message-----
> From: AMSAT-BB <amsat-bb-bounces at amsat.org> On Behalf Of Alan via AMSAT-BB
> Sent: Tuesday, April 30, 2019 3:10 AM
> To: 'Hans BX2ABT' <hans.bx2abt at msa.hinet.net>; APBIDDLE at MAILAPS.ORG
> Cc: amsat-bb at amsat.org
> Subject: Re: [amsat-bb] Fox -1B / AO-91 in trouble?
>
> Hans,
>
> Looks like if it IDs, the signal is normal and you get the usual 2
> telemetry
> frames.  If the transponder has been brought up, you get the odd signal,
> with a brief switch to DUV at the end, but no telemetry.  The command staff
> have been notified.
>
> 73,
>
> Alan
> WA4SCA
>
>
> <-----Original Message-----
> <From: Hans BX2ABT [mailto:hans.bx2abt at msa.hinet.net]
> <Sent: Tuesday, April 30, 2019 01:14 AM
> <To: APBIDDLE at MAILAPS.ORG
> <Subject: Re: [amsat-bb] Fox -1B / AO-91 in trouble?
> <
> <Hello Alan,
> <
> <Then you were luckier than I was. I couldn't get anything. Let's just
> <wait
> and see.
> <
> <73 de Hans
> <
> <BX2ABT
> <
> <
> <On 04/30/2019 01:34 PM, Alan wrote:
> <> Hans,
> <>
> <> Saw your post, and was able to catch part of a pass here.  As you
> described.
> <>
> <>
> <> There were two periods where the audio switched to the normal DUV
> <rumble, <> and I got 2 frames each time.
> <>
> <> 73,
> <>
> <> Alan
> <> WA4SCA
> <>
> <>
> <> <-----Original Message-----
> <> <From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of <Hans
> <>
> <BX2ABT via AMSAT-BB <> <Sent: Tuesday, April 30, 2019 00:05 AM <> <To:
> amsat-bb at amsat.org <> <Subject: [amsat-bb] Fox -1B / AO-91 in trouble?
> <> <
> <> <Just had a good pass from Fox-1B, but it seems the bird is in trouble.
> <> <No telemetry and no voices heard, just weird noises. I put a screen
> shot
> <> <on my website: BX2ABT.com. Let's just hope a reset will cure this bird.
> <> <73 de Hans (BX2ABT)
> <> <
> <> <_______________________________________________
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> of
> <> AMSAT- <> <NA.
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> <>
> <>
> <>
> <>
>
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> to all interested persons worldwide without requiring membership. Opinions
> expressed
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