摘要
光缆网络改造增设光节点后,"村村响"广播难以采用原先射频插入的方式进行插播,改用光纤调频广播信号混合复用传输设备进行插播,调试过程中发生广播信号干扰有线电视信号的故障,就广播单频道调制度与有线电视多频道调制度之区别进行理论分析,剖析故障的具体原因。
Heyu Village, located in Yuanqiao Town, Huangyan District, after the additional transformation of optical node in optical network, finds the former RF intersection for inter cut in "Every Village Project" broadcasting unsuitable and switches to optical FM signal hybrid muhiplexing transmission equipment. This paper reports the cable TV troubleshooting of interference from broadcast signal in the debugging process and gives a detailed report of specific reasons for the breakdowns and inferences. Furthermore, this paper also gives a theoretical analysis of the differences between broadcasting single - channel modulation and cable TV multi - channel modulation.
出处
《中国有线电视》
2011年第11期1276-1278,共3页
China Digital Cable TV
关键词
村村响
广播
有线电视
光功率
光调制度
every village project
broadcasting
cable TV
excessive optical power
light modulation