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

[Eric Skoog]

Interesting ......was this the first time we’ve experienced this “feature” on AO-91?   Or anything else similar?

Eric (K1TVV)

Sent from my iPhone

> On Apr 30, 2019, at 1:29 PM, AI9IN via AMSAT-BB <amsat-bb at amsat.org> wrote:
> 
> I warned you it might be me. For some reason I used the time for the
> pass coming up on Friday. Maybe I need a nap. 
> 
> Steve AI9IN
> 
>> On 2019-04-30 1:25 pm, Paul Stoetzer wrote:
>> 
>> What time did you have for the pass?  
>> 
>> The last pass started around 12:13 pm EDT. Next pass is around 1:48 pm. 
>> 
>> 73, 
>> 
>> Paul, N8HM 
>> 
>>> On Tue, Apr 30, 2019 at 1:20 PM AI9IN via AMSAT-BB <amsat-bb at amsat.org> wrote: 
>>> 
>>> Nothing heard from AO-91 on pass over EM79 a few minutes ago. Sometimes
>>> it's me, so if somebody else was able to transmit through the bird, go
>>> with that. 
>>> 
>>> Steve AI9IN
>>> 
>>> On 2019-04-30 1:02 pm, Burns Fisher via AMSAT-BB 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
>>>>> 
>>>>> -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:
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