[amsat-bb] G5400B Rotor Problem

Hi all,

Trying to get a G5400B rotor going but having some calibration problems with the azimuth settings. With power off and the rotor set at the left hand position, I adjust the needle to read 180. When the power is turned on the reading goes to about 182. I then let the rotor go all the way to the right 180 mark and adjust the full scale pot to read 180. The problem is when the rotor is half way around and should be reading 360 it actually reads 345. Any ideas on what I should be looking at? Also there is nothing in the manual to suggest what the “out voltage adjust” pot is supposed to do. What is its function?

Thank you for any advice.

73 Al W8KHP