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2.1连接故障有线电视系统有成千上万个光电连接器,从一定意义讲,有线电视工程就是接头工程。无论调试、维护,首先要解决的问题就是连接。2.1.1光缆及其连接故障2.1.1.1光纤、光连接器、光分路器的损耗1)G-652光纤温度损耗常温下,1310nm,0.32±0.03d B/km;1550nm,0.20±0.02d B/km。高低温,GY/T 130对A类光缆未作规定,对低一个等级的B类光缆规定,-40~+70℃
2.1 Connection Failure CATV system has tens of thousands of optical connectors, in a sense, cable project is the connector project. Regardless of debugging, maintenance, the first problem to be solved is the connection. 2.1.1 Failure of Optical Cable and Its Connection 2.1.1.1 Loss of Optical Fiber, Optical Connector and Optical Splitter 1) Temperature loss of G-652 optical fiber at room temperature, 1310nm, 0.32 ± 0.03d B / km; 1550nm, 0.20 ± 0.02d B / km. High and low temperature, GY / T 130 Class A optical fiber cable is not provided for a lower level of Class B cable regulations, -40 ~ +70 ℃