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有线电视与有线广播兼容传输系统,在实际应用中已经获得成功。该系统的终端电视图像清晰、伴音清楚,有线广播节目声音宏亮,使用方便,减少了建网的投资。这个系统在设计、安装、调试等方面要兼顾电视、广播两种信号传输的要求,因此必须注意以下几个技术问题: 1.兼容系统要满足电视信号和有线广播信号的传输衰耗《山东省共用天线电视系统技术标准(暂定)》中规定用户端输入电平为60～80dB,有线
Cable TV and cable broadcast compatible transmission system, has been successful in practical applications. The system of terminal TV images clear, sound clear, cable radio program sound loud, easy to use, reducing the investment in network construction. The system must take into account the requirements of two kinds of signal transmission such as television and radio in the aspects of design, installation, debugging, etc. Therefore, the following technical problems must be paid attention to: 1. The compatible system should satisfy the transmission loss of the television signal and the cable broadcasting signal. “Shandong Province Common Antenna TV System Technical Standards (tentative) ”in the provisions of the client-side input level of 60 ~ 80dB, cable