The Antenna Control Unit (ACU) provides the power to the antenna and controls various settings of the antenna. The digital VFD (Vacuum Fluorescent Display) allows for easy operation of the ACU, even in the dark. Functions of the ACU: Provides power to the antenna unitMonitors the antenna statusChanges the target satelliteSet up the user environmentSet the current GPS informationSet satellite informationPerform self-diagnosis of the antennaSet up the interface with a PC