It can be used in EQ mode on a table top or tripod but the instructions (supplied with my ETX90 RA version anyway) were written by someone with a fundamental misunderstanding of how the RA ring works on the scope.
You calibrate the RA position, with the RA drive running (and after you've polar-aligned), by pointing to a guide star (of known RA value) and then moving the ring so it reads the same value as the RA guide star. The RA ring automatically moves with the rotating top of the base so as the scope tracks, the RA reading stays the same. So far, so good.
What the instructions failed to describe is the special technique that you need to use (that is unique to the ETX 90 RA) when you want to pan to a new location. You need to put your thumb on the RA ring and bottom of the base, together, so the ring temporarily STAYS PUT relative to the bottom of the base, while at the same time rotating the top of the scope (letting it slide under the RA ring) to the new position (new RA reading). Then let go of the RA ring.
Edited by munirocks, 20 January 2020 - 01:45 PM.