摘要
光纤同轴混合(HFC)网是目前承载数字电视信号的主要传输媒质,HFC网络能否真正满足数字电视传输网络的要求,需要对HFC网络中数字电视信号性能参数进行测试分析。在讨论数字电视信号电平、误码率、调制误差比等主要性能参数的基础上,根据实际运营的有线数字电视HFC网络构建测试模型,测试了数字电视信号的性能参数,分析了数字电视信号在HFC网络中的传输情况。测试分析表明:在目前条件下,HFC网络能适应数字电视信号的传输,有一定的优越性。
Today hybrid fiber coax （HFC） network is the main medium of transmitting digital TV signals, but it is necessary to determine whether HFC can meet the requirements of wideband digital TV signal transmitting by measuring and analyzing the digital TV signal parameters. Based on the discussion of digital TV signal parameters, such as signal level, bit error ratio, and modulation error ratio, and according to the really operating HFC networks, the measurement model is built. And the digital TV signal parameters in the HFC model are measured. The digital TV signal transmisson characteristics in the HFC model are analyzed. From the results of measurement and analysis, it is obvious that HFC networks can adapt the transmission of digital TV signal.
出处
《光纤与电缆及其应用技术》
2006年第3期11-14,20,共5页
Optical Fiber & Electric Cable and Their Applications
关键词
光纤同轴混合网
数字电视信号
测试
hybrid fiber coax network
digital TV signal
measurement
