The SP220L is cost-effective 20GHz analog RF signal generator under Prosund SP200L series, compact 2U industrial rack chassis with continuous frequency coverage from 9kHz to 20GHz. It only supports analog signal generation (without vector IQ demodulation), integrating four output functions: continuous wave, AM/FM/PM analog modulation, pulse modulation and linear frequency modulation (LFM). It is designed for basic excitation testing of microwave passive components, RF power amplifiers, receivers and radar local oscillators, serving as a cost-effective alternative to imported instruments for mass production testing, SME R&D and university microwave teaching.