RSA320 is a spectrum signal measurement module that meets the needs of customers for high-performance spectrum measurement and analysis, providing low phase noise and very wide analysis bandwidth, 2G high-speed A/D acquisition of IF signals, quadrature digital down-conversion, real-time digital down-conversion, and anti-alias filtering through the FPGA, built-in real-time spectrum calculation module, the results of which are sent to the main controller through the high-throughput PXIE interface, supporting rich real-time spectrum and vector signal analysis functions, especially supporting rich API interfaces to meet the needs of users for flexible customisation. The controller supports rich real-time spectrum and vector signal analysis functions, especially supports rich API interface, which can meet the user's demand for flexible customisation. It is widely used in spectrum signal analysis, spectrum monitoring, radar signal analysis and other fields.