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利用一种简易的测试方法对HFC接入网回传通道及相关设备的NPR指标进行测试,力图准确了解回传通道开展业务后,放大器和光链路对回传系统的指标影响程度,从而为HFC接入网中开展综合业务提供理论指导,并通过实际双向HFC接入网回传系统NPR的测试证明,只要回传输入电平满足网络设备的回传功率驱动要求,同时网络回传通道设计合理,系统的回传NPR指标是完全能够满足IEC60728-10反向通道噪声功率比NPR≥25dB的要求的。
Using a simple test method to test the NPR index of the HFC access network backhaul channel and related equipment, trying to understand exactly how the amplifier and the optical link affect the index of the backhaul system when the backhaul channel conducts service, so as to provide the HFC Access network to provide integrated services to provide theoretical guidance, and through the actual two-way HFC access network return system NPR test proved that as long as the return input level to meet the power requirements of the network equipment backhaul power, while the network return channel design is reasonable , The systematic return NPR index is fully able to meet the IEC60728-10 reverse channel noise power ratio NPR ≥ 25dB requirements.