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随着我国电视工业的迅速发展,高频闭路电视多路传输越来越显示出它的优越性.它不仅应用在电化教育中,还应用在研究单位、工厂、旅馆及集体住宅中.本文就高频闭路电视的特点,多路传输的实施,器件的选择制作以及系统的设计作一简要介绍.一、电视信号的传输方式电视信号的传输方式可分成三种.高频开路传输是把视频信号与伴音信号通过调制器变为高频电视信号,然后通过发射机及发射天线发
With the rapid development of China’s television industry, the high-frequency CCTV multiplex transmission shows its superiority more and more.It is not only used in the education of electrification, but also used in research institutes, factories, hotels and collective houses. The characteristics of high-frequency closed-circuit television, the implementation of multiplex transmission, the device selection and production system design as a brief introduction. First, the transmission of television signals TV signal transmission can be divided into three types. High frequency open transmission is the video Signal and audio signals through the modulator into a high-frequency television signal, and then through the transmitter and transmitting antenna