早期和近年有线电视用户放大器设置与设计方法分析比较

A Comparison of Early Years and Recent Years About Setting and Designing CATV Distributive Amplifiers

分析比较早期乡镇独立前端小型系统和近年实施多级光缆联网后用户放大器设置特点和设计方法 ,提出当前乡镇有线电视系统在多级光缆联网后不容许实施多级用户放大器串联设置的理论依据和事实依据 ,指出当前乡镇实行用户放大器多级串联设置是失真指标劣化和导致提前更新改造的主要原因之一 。

Analyzed and compared setting and design method of distribution amplifiers over multistage optical fiber network in recent years and isolated systems in early years in villages and towns. Theoretical and practical foundations shows that series can’t be used to set distribution amplifiers in multistage optical fiber network, and pointed out that series setting is the major cause of index deterioration and the necessity of subsequent system reconstruction.