Technology for calibrating vector signal analyzer in aspect of FSK demodulation error

The paper addresses the problems about calibration of vector modulation error: first, lacks traceability. Second, lack of error setting. To solve the problems in the aspect of FSK demodulation of vector signal analyzer, we propose new solutions to calibrate vector demodulation error, namely, use analog PM signal with certain parameters, to construct an "equivalent FSK signals" with modulation error. The signals' modulation error such as EVM can be traced to PM frequency and modulation index, and is also adjustable within a wide range. This technique can be used for calibrating VSA and Radio Communication Tester in the aspect of FSK Demodulation Error.