广电有线网用中低档频谱仪进行线路维护的可行性研究

为使我国广电有线电视网维护和故障抢修的效率普遍提高，并结合现阶段全国多数有线电视网络公司资金欠缺、仪器配置与人员专业素质不高的特点，尝试用CX350中档频谱仪排查“广电有线电视网某一个数字频道的几套节目（或几个频道的多套节目）周期性出现马赛克和停顿”现象以及用TelemannlS00低档频谱仪通过同时测试开机信号电平和观察信号频谱判定广电有线数字电视RF传输故障，获取了相关的实际频谱曲线，最后得出了“带QAM解调模块的中档手持式频谱仪可较好地用于干线的维护；不带QAM解调模块的低档频谱仪可用于楼栋分配网和用户端的维护”的结论。

Radio and television cable networks with low-grade spectrum analyzer line maintenance carried out feasibility study

To improve the efficiency of our television cable network maintenance, combined with the national stage, most cable networks company lack of funds,equipment and personnel professional quality is not high,I try to use CX350 mid- range spectrum analyzer to troubleshoot the ＂Radio cable television sets of a particular digital channel program （or sever- al channels of multi-sets of programs） appear periodically mosaics and pause ＂phenomenon as well as low-grade spectrum analyzer with TelemannlS00 tested by simultaneously observing the signal power spectrum of the signal level and cable digital television broadcasting determination RF transmission failure, access to the related actual spectral curve of the con- clusion of the ＂mid-range with a QAM demodulator module handheld spectrum analyzer can be better used for the main- tenance of trunk; QAM demodulation module with no low-end spectrum analyzer can be used to BAN distribution net- work and client maintenance ＂conclusion.