Hi Lawrence,

The fix for this involves editing 'ccds.nam'. Take
a look for your camera, the Starlight XPress SXV-H9.

A few lines above, you'll see that the SBIG cameras have
the guider chip at the end of the line. This is now the preferred
way of doing things; it means that the guiding data for each SBIG
camera is already in place, and people can just say "I've got an
ST-9" without needing to play about with guide.dat and the
oddities of the GUIDER_CHIP line.

You do have the correct numbers (0.0, 0.9, .72, .72). Put them
at the end of the SXV-H9 line, and everything will work correctly.

I see that just putting a GUIDER_CHIP line in 'guide.dat' leaves
much to be desired now. If you fire up the CCD frame dialog, it
will look through 'ccds.nam' and reset the GUIDER_CHIP line anyway.
I've modified the 'update7' page to mention that things work much
differently (better, I hope!) in Guide 8, and that one should look
within 'ccds.nam' for full documentation of how to add a guiding chip.

It's unclear to me if this positioning is a "fixed" sort of thing?
Maybe I should be thinking about the need to allow more flexible
guider chip arrangements ("I've got camera X, am using a camera Y
for a guider, and it's offset like this, and I'd like to set all
this up in Guide without playing around with obscure 'guide.dat'
or 'ccds.nam' files.")

-- Bill