Control and diagnostic system for the demonstrator of S Band active antenna

In the paper, a Control and Diagnostic System designed for the Demonstrator of S Band Active Antenna is presented. Transmit and receive antenna radiation pattern is steered and controlled by a central computer. Diagnostic system is focused on transmit part of the demonstrator with solid state T/R modules. The key elements of diagnostic, amplitude and phase meters integrated with each transmit channel are presented. The system works in pulse condition. Real, transmit signal as reference for diagnostic system is used. Independent, built-in system of diagnostic for T/R modules are presented as well. It enables safe modules operation and failure location in service mode. The Control and Diagnostic System is based on CAN 2.0 bus what allows to operate with very high reliability and baud rate up to 1 Mb/s.