ASTRO-PHYSICS German Equatorial 1200GTO, Manual, Page: 25 / 38

PEMPRO ASTRO-PHYSICS SPECIAL EDITION BY SIRIUS-IMAGING
PEMPro™ (Periodic Error Management Professional) is a Windows software application that makes it easy to characterize
and reduce periodic error. PEMPro™ will analyze the performance of any mount that is equipped with a CCD camera and
compatible camera control software. PEMPro™ gives you powerful tools to program your mount's periodic error correction
firmware to achieve the best possible performance for your mount. PEMPro™ dramatically improves guided and unguided
imaging resulting in better images and fewer lost exposures. PEMProAP™ is a special edition that can only be used with a
single Astro-Physics mount.
The uncorrected periodic error of your 1200GTO will be 5 arc seconds or less when it leaves our facility. Starting in 2007, we
will have reduced this already small native error significantly by loading the error curve from our extensive testing procedures
into the servo system. The resulting error that remains should be negligible, and will probably be satisfactory for all but the most
demanding applications. You can, however, reduce the error even further to maximize performance without auto-guiding by
recording a much longer run with PEMPro™ that will average more complete cycles of the worm.
As a normal item of mount maintenance, you should plan to redo your PEMPro™ run once a year (more or less depending on
usage) to compensate for gear run in. If you ever remove your motor / gearbox or manually turn the worm gear, you will also
invalidate any previously recorded corrections and will need to do a new PEMPro™ run. (Manually moving the telescope does
NOT turn the worm gear, so that is not a problem!) Complete documentation is provided in the help menu of the installed
program. Also, please read the Important Information HTML file on the CD before loading PEMProAP onto your computer.
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