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Old 09-09-2010, 11:26 AM
allan gould's Avatar
allan gould
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allan gould is offline
 
Join Date: May 2005
Location: Brisbane
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Quote:
Originally Posted by JohnH View Post
Can you explain why this method is better?

I was of the understanding that ST4 commands would be better than anything going via the software/firmware/serial loop (less lag?) - when using a camera with on-board guide port (eg QHY5).

Or perhaps I should just try it?
Its all explained here :-
http://f1.grp.yahoofs.com/v1/kDGITGR...%20Guiding.pdf
but to quote from the article:-
ST4 Guiding
• Advantages:
– Available in All EQMod Connection options
• Disadvantages:
– Rate changes will require re-calibration
– Can not be combined with PEC

Pulse Guiding
• Guide commands sent via EQMOD
• Advantages:
– Variable rate pulse guiding
– Modify/modify pulse control on the fly
– Combine with PEC
• Disadvantage:
– Can only work with EQDIRECT configuration
– Too many variables (things to remember)

EQMOD and Gemini pulse guiding apparently operate the same AFAIK
Allan
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