摘要
当前,要想促使广播事业得到更好的发展,就需要引进合理的广播发射机,其具备循环调制和功放模式以及故障检测等多项功能,有利于降低故障出现的概率,提升稳定性和安全性。从实际运行现状来看,该种类型的发射机出现故障也是极为频繁的。射频激励器给发射机提供某一频率射频激励信号,配有外部激励输入接口,有并机工作同步激励输出功能,有的机型配有专用外部激励器。正常情况下主备激励可以实现自动切换,以确保发射机正常工作的可靠性。基于此,本文论述了射频激励工作原理,分析故障原因,为快速处理故障提供处理路径。
In order to promote the better development of broadcasting industry,it is necessary to introduce reasonable broadcast transmitter,which has many functions,such as cyclic modulation,power amplifier mode and fault detection,which is helpful to reduce the probability of failure.Improve stability and safety.From the actual operation status,this type of transmitter failure is also extremely frequent.The RF exciter provides a certain frequency RF excitation signal to the transmitter,which is equipped with an external excitation input interface,and has the function of synchronous excitation output.Some models are equipped with special external exciter.Under normal conditions,the main and standby excitation can realize automatic switching to ensure the reliability of the transmitter.Based on this,this paper discusses the working principle of RF excitation,analyzes the cause of failure,and provides a processing path for rapid fault handling.
作者
李业军
温长生
Li Yejun;Wen Changsheng(Radio and Television Station of Hubei Province,Wuhan Hubei,430022)
出处
《电子测试》
2021年第12期51-52,共2页
Electronic Test
关键词
欠激励
过激励
under-motivation
over-motivation
