PEM

PEM is the Astro-Physics implementation of periodic error correction. If you have Rev S or later firmware (or a GTOCP4) then PEM status should be reflected in this group box's title.

Enable: Enables the mount's periodic error correction facility.

Disable: Disables the mount's periodic error correction facility.

Record: Starts a PEM record, which will last the duration of one worm period. During that time