HFC电缆分配网噪声干扰的分析与对策

Analysis and Countermeasures the Noise in HFC Cable Distribution Network

论述通过实验模拟2种电缆分配网常见的特性噪声注入回传通道,研究噪声对通道SNR的影响,得出了只有工作频率上的噪声对通道SNR产生影响的结论,并通过实际案例进一步分析这两种特性噪声,得出无源互调产物是分配网系统内主要噪声来源的结论。

This article discusses the common characteristics through experiments simulating the two cable distribution network return channel noise injection study the effect of noise on the channel SNR, obtained only operating frequency noise on the impact on the channel SNR conclusions; and through further analysis of actual cases these two characteristics of noise, draw conclusions passive intermodulation products within the distri- bution network system is the main source of noise.