The SP900S is flagship ultra-wideband millimeter-wave signal analyzer under Prosund SP900S series, continuous frequency coverage from 2Hz to 50GHz, the highest-performance domestic model in this frequency band. Equipped with self-developed DDS low-phase-noise LO, max 4GHz ultra-wide IQ analysis bandwidth, it integrates five core functions: real-time spectrum analysis, phase noise measurement, noise figure test, pulse analysis and vector demodulation, replacing separate spectrum analyzer + noise figure analyzer + pulse analyzer combo.