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有线电视前端是整个有线电视网络的“心脏”,由它引发的故障可直接导致整个网络终端的收视出现异常,所以对它的日常维护、检修显得尤为重要,要力求达到快速、准确,以保证信号的安全优质播出。这就要求我们机房维护人员不仅要掌握常规的故障排除方法,还应熟悉一些“偏方”。笔者在工作中就遇到一些“杂症”,现列举如下,以供同行们参考。 实例一:CCTV-5出现间歇性的中断,约2分钟后又自动恢复正常,而经同一卫星天线接收的CCTV-6、CCTV-3、CCTV-8则无异常。 这四套加密节目经过同一功分器供给四台解码
The front end of CATV is the “heart” of the entire cable television network. The fault caused by it can directly lead to abnormal viewing of the entire network terminal. Therefore, it is especially important for its routine maintenance and overhaul to be fast and accurate so as to ensure Signal safety and quality broadcast. This requires that we not only have room maintenance staff to master routine troubleshooting methods, should also be familiar with some “recipe”. I encountered some “miscellaneous diseases” at work, are as follows, for colleagues for reference. Example 1: An intermittent interruption occurred in CCTV-5 and returned to normal after about 2 minutes. However, CCTV-6, CCTV-3 and CCTV-8 received by the same satellite antenna were normal. The four encrypted programs through the same power splitter supply four decoding