The SP850B is Prosund mid-range flagship microwave vector network analyzer under SP800B series, covering ultra-wide continuous millimeter-wave band from 100kHz to 50GHz, available in SP850B-250 (2-port) and SP850B-450 (4-port) hardware variants. Target applications include 5G/6G millimeter-wave RF frontends, 24~50GHz radar, satellite communication, automotive millimeter-wave radar, wideband RF power amplifiers, multi-port duplexers, high-speed millimeter-wave PCB traces, mass production FCT batch testing, precision university microwave labs and domestic millimeter-wave component metrology calibration.