中波发射机易遭雷击烧功放问题排查及改进措施分析  

Analysis of Troubleshooting and Improvement Measures for the Problem of Lightning Strikes and Power Amplifier Burning in Medium Wave Transmitters

作　　者：毛超[1] 王贵金[1] Mao Chao;Wang Guijin(Yangzhou Radio and Television Station,Jiangsu 225009,China)

机构地区：[1]扬州广播电视总台,江苏225009

出　　处：《广播与电视技术》2023年第5期114-118,共5页Radio & TV Broadcast Engineering

摘　　要：扬州中波台新购更新了两部全固态PDM 1kW发射机,在安装调试正式使用中新发射机正常运行,技术指标都正常,但是遇雷暴天气极易烧功放,连续两年在雷暴天气观察都有此现象,而以前的发射机出现此故障很少。本文从梳理机房现有防雷措施入手,介绍分析该故障检修流程并逐步排查故障原因,提出具体改进措施和方案。Two all solid-state PDM 1kW transmitters have been newly purchased and updated by Yangzhou Medium Wave Station.During the installation,debugging,and official use,the new transmitters are in normal operation and the technical indexes are normal.However,it is easy to burn the power amplifier in thunderstorm weather.This phenomenon has been observed for two consecutive years during thunderstorm weather,and the previous transmitters have rarely experienced this fault.This paper introduces the existing lightning protection measures in the computer room,analyzes the fault maintenance process,investigates the cause of the fault,and puts forward specific improvement measures and schemes.

关 键 词：全固态 PDM发射机 雷击 场效应管 防雷器 邻频感应串扰 

分 类 号：TN94[电子电信—信号与信息处理]