I have an older ap 900 mount with the GTOcp1 controller, and I am not sure how to program a PEC curve to the mount. When in the "acquiring data" mode, I select the PEC OFF option, but that does not change the AP GTOCP1 control box PEM menu setting from "PLAY to NONE". And when I select the PEC ON option in Pempro it does not switch the AP GTOCP1 control box PEM setting to "PLAY". I manually set the control box setting to "NONE" and choose the PEC OFF option in Pempro when acquiring the data. Once I create the PEC curve I am not sure if it is being recorded to the mount when I click the "Start Playpack" button in the "program mount" window of Pempro. Do I need to manually start recording in the PEM menu of the AP controller before starting playback? When I start playback in Pempro, the PEM setting in the control box does not automatically switch from "NONE to RECORD". When I enable "PLAY" in the control box PEM menu and re-acquire data with PEC enabled in Pempro, My periodic error is worse. Of note is that on a repeat run of data acquisition after the above steps, but with PEC off in Pempro and PEM set to "none" in the control box I got a much improved PE curve. It went from +/- 4.8 to +/- 1.47. That confused me even more. I could not find anything in the help files specifically for programing the GTOCP1 control box. Are there any specific data or instructions available to help me understand and solve this? Any advice would greatly appreciated.

The GTOCP1 must use the manual acquire and playback (Program Mount) to program the mount.

These sections under the User Guide of the Help file explain in detail what you must do (and mention Astro-Physics mounts when there is something specific to it):

(Under "Users Guide" section of the help):
Acquiring Data
Analyze
Create PE Curve
Program Mount

-Ray

I am sorry, but I made an error in the original post. The control box is a GTO CP2, not a CP1. Otherwise my questions are the same.
Thanks again!

I would like to apologize for my ignorance, but I still don't fully understand how to verify the mount has been programmed and running the Pempro error correction curve data. Last night I used Pempro, created a curve, and recorded it to the mount, but the AP hand controller's PEM function did not seem to be affected by this. Are the Ap hand controller's PEM and the Pempro program using different and independent methods for correcting periodic errors? If so, how do you disable or enable the Pempro mount corrections when you are using the telescope when the Pempro program is not running? In other words, after I program the mount with a pempro generated curve, should the AP hand controller PEM option be set to "NONE" or "PLAY"? Also, when I am through programming the mount with the Pempro playback function, is PEC automatically turned on?
Thanks again

quote:

but the AP hand controller's PEM function did not seem to be affected by this.

Forget the hand controller. It is just another computer talking to the mount just like your PC. PEMPro can turn PEM on and OFF on it's own. When you start to acquire data you should see a popup from PEMPro that asks you if you want to turn PEM on or OFF. While PEMPro is running do NOT also do anything with the keypad.

quote:

If so, how do you disable or enable the Pempro mount corrections when you are using the telescope when the Pempro program is not running?

You can enable PEM with the Hand Controller, with PulseGuide (an application for AP mounts), or in the ASCOM driver setup dialog.

quote:

Also, when I am through programming the mount with the Pempro playback function, is PEC automatically turned on?

Yes. (And it does state this in the documentation: http://www.siriusimaging.com/H...Pro/ProgramMount.htm - near the bottom of the link).

-Ray

Thank you very much for your response.That was very helpful.

Ok, glad that helped!

-Ray