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在明线载波设备维护中,经常发现当外线或实线振铃时,造成载波机导频中断和电路不通的现象,这是由多种因素造成的。现将故障分析及检修方法介绍如下,以供维修时参考。 (1)首先弄清同一线对中所开载波设备是全部中断还是部分中断,以便区分故障段落。若十二路机和三路机全部中断,应从十二路机的引入盘向外检查,不必考虑线路滤波器以内部分;若是十二路机中断,三路机正常,应考虑十二路机的线路高通滤波器;若十二路机正常,三路机中断,则应检查十二路机的线路低通滤波器和三路机的引入盘及线路高通滤波器。
In line carrier equipment maintenance, it is often found that when an external line or a solid line rings, carrier wave pilot breaks and the circuit is blocked, which is caused by a variety of factors. The fault analysis and maintenance methods are introduced below, for maintenance reference. (1) First of all, it is necessary to find out whether the equipment of the carriers carried by the same line pair is all or part of the interrupt, in order to distinguish the fault paragraphs. If the twelve road machines and three-way machine all interrupt, should be imported from the twelve road machine out to check, do not have to consider the line filter within the part; if the twelve road machine interrupt, three machine normal, should consider the twelve road machine Line high-pass filter; if the twelve road machine is normal, the three-way machine is interrupted, you should check the twelve road machine line low-pass filter and three-way machine into the plate and line high-pass filter.