My elevation system is extremely tight with minimal backlash, and easy to get the
hysteresis down to a couple tenths of a degree.
My azimuth system is fairly free of backlash also, but has a drift problem, i.e., when the
motor is shut off, the mass keeps moving for a couple tenths. I think this could be
improved by adding a brake to my AZ drive motor, which I will probably do in the future.
The hysteresis on Azimuth is about -0.4 degrees to +.3 degrees. Meaning that when the
target moves passed the antenna by 0.4 tenths, the system corrects, but shuts off only 0.1
beyond but drifts an extra couple tenths. Even on 2.3GHz this seems to keep on track
pretty well, even with my 3dB beamwidth of 0.95 degrees.