... 's controller via RS-232 interface, to control antenna polarization match and direction axis rotation through connector; ... get a high-precision result quickly.In the diagram: 1 - antenna bracket , 2 - 2D positioner , 3 - polarizationpositioner , 4 - positioner' ... positioner's control cables , 8 - RF cables , 9 - source antenna ,10 - tested antenna , 11 - vector network analyzer , 12 - printer , 13 - ...