MDM Trouble Report for 2003 Feb 1

Telescope: 2.4m
Observer(s): Thorstensen (Dartmouth)
Instrument: modspec + echelle

Problem(s) Encountered:
[This trouble actually occurred on Feb 2, but I'm in a date
box because trouble reports are tied directly to dates.  So
I'm fictionalizing that this occurred on Feb 1, because it
doesn't matter when it happened.]

After I took the first exposure of the night, CCDcom returned
the error message:
 ccd_aread: wrong aio finished, expected 0.  This is bad.
Failed, return code = 0, elapsed = 2.594000 .
I tried  df echelle , and it responded with
 Error in download -4 (camera not responding) 

I had to do the following procedure twice before I could get
going again; I had the procedure in some old notes.

CCD power OFF  - wait (a *long* time it turns out)
CCD power ON
hit reset button
start a new ccdcom program
[I have notes to do some diagnostics as follows:
    diag db 2  
    diag ii
    diag ic   ---  this last should respond
      Camera communication established 
and finally:
df echelle
ut init
ut

The first time I attempted this it failed at  df echelle ,
so I tried it again; this time I waited several minutes with the
power off, and cycled the power on the fiber-optic communication
box in the computer room for the hell of it (I don't imagine
it had anything to do with it but I wanted to get on the air
and figured it wouldn't hurt).  

After things are working you'll want to 

diag db 0       -- to reset the diagnostic debugging output
     to zero.
I think the secret when this happens is to wait for what seems
a very long time for the Leach electronics to completely 
reset, like maybe 5 minutes.

The guider computer was also not answering to the keyboard (I
hadn't turned it off since last night), Ctrl-alt-delete rebooted
it this time.  No time lost.

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Submitted on 2003 Feb 2 [21:30:08]