频谱分析原理及频谱分析仪使用技巧  

Spectrum analysis theory and spectrum analyzer using techniques

作　　者：孙英侠[1] 李亚利[1] 宁宇鹏[1] 

机构地区：[1]中国人民解放军95853部队

出　　处：《国外电子测量技术》2014年第7期76-80,共5页Foreign Electronic Measurement Technology

摘　　要：频谱分析仪是功能强大并广泛应用于射频信号检测的一种仪器。通过对现代外差式频谱分析仪组成原理的论述,分析了频谱分析仪扫描时间、频率跨度与视频带宽的相关性、参考电平与射频衰减的相关性,探讨了噪声、最大输入电平、抗扰度等决定频谱分析仪性能的因素。通过对频谱分析仪原理的阐述和特性的分析,列举了对频谱分析仪使用不当导致测试结果失真的案例,避免了实践中对频谱分析仪原理了解不透彻导致的测量错误。A spectrum analyzer is a powerful measurement instrument which widely used in RF signal detection.The thesis based on the overview of the principle of heterodyne spectrum analyzer,analyzed the correction of sweep time,resolution bandwidth and video bandwidth,the correction between reference level and RF attenuation,and discussed the noise,maximum input level,noise immunity which influenced the performance of spectrum analyzer.This paper discussed the principle and analyzed the characteristics of spectrum analyzer;enumerated result distortion cases caused by using spectrum analyzer undeserved,and avoid any measurement error in practice.

关 键 词：外差式频谱分析仪 中频信号处理 抗扰度 

分 类 号：TN911.7[电子电信—通信与信息系统]