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本文研究了采用光纤微波副载波复用技术对多路电视信号进行长距离中继传输的基本限制和主要技术。分析了在电继传输时,PAL—D制电视传输频道数限制及微波副载波的最佳频带。讨论了单模光纤色散和衰耗特性对光系统的要求。给出了由光波层、微波层、电视层共三个层次组成的系统单元的方案。并对系统单元做了一些基本实验。
This paper studies the basic limitations and main techniques of using optical fiber microwave subcarrier multiplexing technology for long-distance relay transmission of multi-channel television signals. This paper analyzes the limitation of the number of TV channels and the best sub-band of microwave subcarrier in PAL transmission. Optical system requirements of dispersion and attenuation characteristics of single-mode fibers are discussed. The scheme of system unit consisting of three layers of light wave, microwave and television is given. And made some basic experiments on the system unit.