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Yes I see what you're saying. Well if you can rule out crud on the gear system or belts then that leaves a software spike caused by some not wanted pulse. Does it only happen with Protrack enabled or without?
Greg.
Greg, I totally agree with what you are saying. My point, however is that with the guide camera pointed at pa=45 any crud or PE, or whatever on either axis would show up on the graph equally distributed between X and Y. It would only show up "more" on one axis than the other as the camera continued to be rotated towards the 4 cardinals (0,90, 180,270). On a cardinal all of the error of a particular axis would show on either X or Y, but not both. Calibration doesn't change at all what is seen on the graph (which is precisely why calibration is NOT required to perform PE measurement in TSX. With this in mind it is tricky to figure out why one should see any major differences between X and Y plots on average. How can one explain a strong spike in only one axis with the camera oriented at PA=45?
I really appreciate any and all input on this as my question at SB is being totally ignored.
Peter[/QUOTE]
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