... . Main monitoring computer transmits control signals into positioner's controller via RS-232 interface, to control antenna ... 1 - antenna bracket , 2 - 2D positioner , 3 - polarizationpositioner , 4 - positioner's controller , 5 - Main monitoring computer , 6 - test software , 7 ... - positioner's control cables , 8 - RF cables , 9 - source antenna ,10 ...