有线电视放大器调试参数和质量指标的计算  

Calculation of Debugging Parameters and Quality Index of CATV Amplifier

作　　者：林挺逵 周岩 LIN Tingkui ,ZHOU Yan （1. Taizhou Luqiao Broadcast Television Center, Zhejiang Taizhou 318050, China; 2. Qinhuangdao Bohai Cable Information Network Co. , Hebei Qinhuangdao 066001, China）

机构地区：[1]台州市路桥广电中心,浙江台州318050 [2]秦皇岛渤海有线信息网络公司,河北秦皇岛066001

出　　处：《中国有线电视》2007年第2期138-144,共7页China Digital Cable TV

摘　　要：先根据放大器的信号通路分析放大器输入口电平、输入电平和输出电平之间的数量关系，然后推导出放大器输出电平调试参数输入衰减量LAT和输出斜率调试参数均衡量EQ的计算方法，再分析放大器设置斜率以后失真指标和C／N指标的计算方法，说明光发射机必须输入平坦的信号，最后分析放大器质量指标的评议方法。Based on amplifier＇s signal channel, this paper analyzes the quantitative relation among input port level, input level and output level. Then, the calculational methods of LAT and EQ are deduced. LAT is an input attenuation of amplifier＇s output level debugging parameter, and EQ is an equation of amplifier＇s output slope debugging parameter. Furthermore, the calculational methods of distortion index and C/N ratio after amplifier＇s slope setup are analyzed to illuminate that optical transmitter should be input with plain signals. Finally, the appraisal approach of quality index of an amplifier is discussed.

关 键 词：调试参数 衰减量 均衡量 输出斜率 指标计算 指标评议 

分 类 号：TN943.6[电子电信—信号与信息处理;电子电信—信息与通信工程]