DX(50/10)全固态中波发射机日常运维过程中直流稳压板故障和VSWR故障浅析  

Analysis of DC Voltage Regulator Fault and VSWR Fault in DX(50/10) All Solid-State Medium Wave Transmitter Daily Operation and Maintenance Process

作　　者：毛玉龙 Mao Yu-long(Chongqing Broadcasting and Television Technology Center Broadcasting Launcher,chongqing 400039)

机构地区：[1]重庆广播电视技术中心广播发射台,重庆400039

出　　处：《电子质量》2019年第3期22-26,共5页Electronics Quality

摘　　要：就中波调幅广播而言,其覆盖面比较广,接收设备成本低,很多偏远的地方都能覆盖到。中波广播人口覆盖率超过95%,是国内乃至世界上广播覆盖人口最多的宣传媒介。最为重要的是中波广播在重大突发事件中发挥了不可替代的作用,比如在汶川大地震后,灾区无法与外界进行信息沟通的紧急情况下,广播在危难之际发挥了巨大的作用。承上所述,中波广播的存在是富有意义的,保障中波频率的正常播出是必要的,由此我们对中波发射机的了解和故障检修是必须的!该文主要针对DX(50)全固态中波发射机在日常运行维护中常出现的两个故障进行分析和探讨。故障1发生在低压电源与音频系统之间;故障2出现在匹配网络及天馈部分。该文主要结合在实际工作中对于这两类故障的分析处理和检修经验进行阐述。In the case of medium-wave am broadcasting,it has a wide coverage,low cost of receiving equip-ment and can be covered in many remote places.With a population coverage of more than 95%,medium wave broadcasting is the media with the largest population coverage in the country and even in the world.The most important thing is that medium wave broadcasting plays an irreplaceable role in major emergencies.For example,after the Wenchuan Earthquake,when the disaster area cannot communicate with the outside world,broadcas-ting plays a huge role in times of crisis.As mentioned above,the existence of medium wave broadcasting is meaningful and it is necessary to ensure the normal broadcasting of medium wave frequency.Therefore,our understanding of medium wave transmitter and troubleshooting are necessary.This paper mainly focuses on the DX(50) all-solid medium wave transmitter in the daily operation and maintenance of the two common failures are analyzed and discussed.Failure 1 occurs between the low-voltage power supply and the audio system;Failure 2 occurs in the matching network and the antenna feed section.This paper mainly combined with the analysis and treatment of these two types of fault and maintenance experience in practical work.

关 键 词：中波发射机 直流稳压器 匹配网络 

分 类 号：TN838[电子电信—信息与通信工程]