卫星宽带中频调制解调器测试平台设计

摘要

In order to realize the fast measurement and improvement of the wide-band satellite IF mod-demodulator performance.Based on the EVM (Error Vector Magnitude) analysis,using the Agilent's large-scale equipment (such as E4438C,E4440A SPA,16803A digital logic analyzer),a wide-band satellite IF mod-demodulator test platform based on EVM measurement is designed.The platform provides a way to get the real-time IF mod-demodulator's EVM value.Even more,the adjustments for improving the IF mod-demodulator's performance is obtained based on the EVM analysis.This platform is greatly helpful for the research on the wide-band IF mod-demodulator and facilitates the satellite communicate research project and education,and improves the service efficiency of the large-scale instruments at the same time.%为实现宽带卫星中频调制解调器性能的快速验证及性能提升,基于EVM(Error Vector Magnitude)误差矢量分析,结合安捷伦的大型精密仪器(如E4438C信号源、E4440A PSA频谱分析仪、16803A数字逻辑分析仪等),设计了基于EVM检测的卫星宽带中频调制解调器测试平台.通过该平台,能直观、实时分析调制、解调器的EVM值.通过EVM分析,给出中频调制、解调器的优化方向,为宽带调制、解调器的研究提供了有力的支撑,促进了宽带卫星通信系统的科研及教学发展,提高了大型仪器的使用效率.