中波发射机输出监测板工作原理浅析
摘要:文章阐述了中波广播发射机输出监测板的工作原理、取样电压和取样电流及VSWR电路,以及入射功率和输出功率监测,从而为整机稳定正常运行提供保护。
关键词:VSWR;相位检测器;包络检波器;定向耦合器
doi:10.3969/J.ISSN.1672-7274.2023.12.021
中图分类号:TN 838,TN 93 文献标志码:A 文章编码:1672-7274(2023)12-00-03
Analysis of The Working Principle of The Output Monitoring Board of The Medium Wave AM Transmitter
ZHOU Jiazhen
(Shanwei Medium Wave Broadcast Station, Shanwei 516400, China)
Abstract: This paper introduces the output monitoring board of the medium-wave broadcast transmitter, describes in detail the working principle of the modified board, and realizes the monitoring of incident power and output power through the sampling voltage, sampling current and VSWR circuit, so as to provide protection for the stable and normal operation of the whole machine.
Key words: VSWR; phase detector; envelope detector; directional coupler
1 基本电路原理分析
输出监测板是发射机的重要部件,包括电压驻波比保护电路、功率测量电路、调制度监测电路等。(剩余4262字)