摘要
介绍一套自主设计制作的播出信号监听监看系统。当中波、调频和电视发射台的节目信号变差、缺失或发射机故障时,系统可辅助值班员迅速判断故障源头,对故障进行处理。系统用到的核心器件是一种用途广泛的D触发器电路。当按下选择按钮,给触发器的CP端一个上升沿时,对应当触发器就会翻转“置1”,其他的触发器“置0”,再通过差分放大器判断,控制模拟电子开关开通,只有对应节目信号可通过;将信号送到监听监看器进行节目质量检测,确保安全优质播出。详细论述系统的结构、原理和调试方法。
This article introduces a self-designed and produced broadcasting signal monitoring system.When the program signal of medium wave,frequency modulation,and television transmission stations deteriorates,is missing,or the transmitter malfunctions,the system can assist the duty officer in quickly identifying the source of the fault and handling it.The core device used in the system is a widely used D trigger circuit.When the selection button is pressed to give a rising edge to the CP end of the trigger,the corresponding trigger will flip “set to 1”,and the other triggers will “set to 0”.Then,the analog electronic switch is controlled to turn on through the differential amplifier judgment,and only the corresponding program signal can pass;send the signal to the monitoring device for program quality testing to ensure safe and high-quality broadcasting.This article discusses in detail the structure,principles,and debugging methods of the system.
作者
江剑锋
JIANG Jianfeng(Guangdong Radio and Television Technology Center 522 Station,Guangzhou 510800,China)
出处
《电视技术》
2023年第3期215-217,共3页
Video Engineering
关键词
D触发器
电子开关
故障判断
D-trigger
electronic switch
fault detection
