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本文论述了光纤同轴电缆混合（ＨＦＣ）网中实现双向传输的几个关键问题，着重对数模混合传输、反向噪声以及反向信号电平控制等问题进行了分析和讨论
This article discusses several key issues in bidirectional transmission in fiber optic coaxial cable hybrid (HFC) networks, and focuses on the analysis and discussion of the problems of mixed digital-analog transmission, reverse noise and reverse signal level control