AvL's patent-pending AvL Cable Drive rotary drive technology provides the ultimate in precision and stiffness over geared or other drive systems. The AvL Cable Drive rotary drive system suffers no backlash and is a simple maintainence free dry mechanism able to operate in a very wide range of difficult and hazardous conditions without degradation. The AvL Cable Drive rotary drive technology is an elegant, simple, system that utilizes the averaging effect of many cables wrapped around a drive capstan and an output shaft. The most important of specifications for a satellite antenna, particularly an auto-acquisition antenna, is the pointing accuracy and the stability and stiffness of the positioner under the most extreme environmental conditions. The positioning accuracy is determined by how precisely the positioner can move to a defined point as well as how stable and stiff the positioner is in maintaining that position. The speed of movement is based on how quickly the positioner can move to a defined position. AvL's patent-pending AvL Cable Drive technology provides the ultimate in precision and stiffness compared to geared drive systems and, unlike most other systems, is free of backlash. It is a maintenance-free dry mechanism able to operate in a very wide range of difficult and hazardous conditions without degradation. Originally invented as an inexpensive way to rotate very large antennas accurately and smoothly, the AvL Cable Drive is an elegantly simple system that utilizes the averaging effect of many cables wrapped around a drive capstan and output shaft.