VertexRSI Model 7133B Antenna Controller The VertexRSI Model 7133B Antenna Controller is for applications requiring low cost and dependable manual antenna positioning for small and medium aperture antennas. Satellite Systems Model ATX-3000 Automatic Inclined Orbit Antenna Tracking Controller The Satellite Systems Corporation Model ATX-3000 Antenna Tracking Controller is a user-friendly microprocessor-based system to reliably track inclined orbit satellites.