[amsat-bb] AO-40 Update, 2002-09-09

["Stacey E. Mills" <w4sm@xxxxxxxxxx>]

\Hello All,
>  at the risk of getting complaint mail, it looks like the IHU has 
> crashed, ao40
>is transmitting a steady bpsk carrier with no data
>at 1038utc...
>
>Kevin WA6FWF

No complaint,  just thanks and a clarification.

The IHU-2 was on and I'm sure this is the problem.  If the IHU-1 had 
crashed during the beacon off period, the beacon would not have come on 
nominally at MA = 106.  I mentioned on the amsat-bb earlier that we are 
having to leave the IHU-2 on longer for photos and that if  (when) it 
crashed this would be one result.  In addition to unmodulated carrier, 
sometimes it outputs gibberish.   As the IHU-1 should be functioning 
nominally, this is of no consequence to normal function and should be a 
quick fix as soon as a command station gets access and turns off  or 
re-loads the IHU-2.

We are working to determine why the IHU-2 crashes and will be leaving it on 
quite a bit with variations in its software to turn caches on / off, wash 
the memory, etc., so this will probably happen multiple times in the future.



-- 
  _______________________________________________________________________
  Stacey E. Mills, W4SM    WWW:    http://www.cstone.net/~w4sm/ham1.html
   Charlottesville, VA     PGP key: http://www.cstone.net/~w4sm/key
  _______________________________________________________________________

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