数字电视主要技术参数的测量与分析

Measurement and Analysis of the Main Technical Parameters of Digital TV

主要介绍有线数字电视的平均功率电平、误码率(BER)、调制误差率(MER)三个关键参数的物理概念、测试方法,以及在技术维护中利用这三个参数分析和判断网络出现的各种质量问题,有效保证数字电视信号在网络中的传输质量。

This article mainly introduces the physical concepts and test methods of the three key parameters of the average power level,bit error rate（ BER）,and modulation error rate（ MER） of cable digital TVs. It also describes how to use these three parameters to analyze and judge the network appearance in technical maintenance and effectively ensure the quality of digital television signal transmission in the network.