Hello Gary,
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That is correct.
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However, when guiding at the bottom to the right you can set MAX pulse duration in AZ and ALT, default is 2500 ms which i have not found a reason to change.
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Even if you would change the calibration step size on brain -> guiding ->calibration step (ms): next to Advanced it will automatically change back to the value calculated by the values entered when creating the profile and also depending on guidspeed entered which is found when clicking on Advanced.
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You have to keep an eye on what the number is on calibration step (ms): since it could suddenly change for example if there is a different guidespeed in the Meade Generic driver if connected so the guidespeed there could overwrite the guidespeed in PHD2.
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It once changed to 2300ms for me and i am not sure why. PHD2 recommends that you should create a new profile if a parameter has changed and not do manual changes, pherhaps that is the reason.
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However i have found that, as long as you keep an eye on that number and it works i have not found a reason to create a profile from scratch.
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Best regards
Gabriel
Gabriel Wiklund