Only Known Problem

[Tom Droege <tdroege2@earthlink.net>]

The Clear Sky Clock promises good weather tonight so I should be able to 
run all three systems.  Gosh, clear sky and no moon.  This does not happen 
very often.

The only known problem is TOM3 which occasionally writes a bad file.  I 
have tracked this down to the chiller.  TOM3 and TOM2 are both on the same 
chiller and so should both be subject to the noise.  However, TOM2 controls 
the chiller.  So it turns it on and off when it is not transferring an 
image.  This is a lesson in noise elimination.  If you can't eliminate the 
noise, make sure it happens when you are not doing something critical.

If TOM2 and TOM3 were running on linux boxes, then someone here could 
probably solve how to have the two control programs compare notes and 
switch the chiller at a safe time.

I will try to solve the problem at the source, which is usually the right 
way.  I have ordered a line filter and will try to locate it so that the 
chiller switch on does not radiate and get into the output cable.  If that 
does not work, I will try a shielded cable.  I can probably get away with 
one of the ones I have.

Tom Droege