一种快速、准确地找出CATV传输电缆中短路点的判断方法

• 作 者: 张克危
• 机 构: 湖南岳阳县有线台
• 出 处: 有线电视
• 发表日期: 1995年11期
• 关键词: CATV 短路点 芯线 屏蔽层 故障率 人为故障 铅弹 短路故障 支干线 电阻档

有线电视,顾名思义是靠电缆来传输电视信号的。线路越长,故障率就越高。其中,最使人伤脑筋的是人为造成的电缆短路故障。例如,有人为了盗接信号,在电缆中插针,并将针尖断在电缆中,造成芯线和屏蔽层短路。有的人为了打鸟,用汽枪向电缆射击,将铅弹射入电缆形成短路,这些现象时常发生,使信号严重衰减,直接影响了有线电视网络的正常运行。由于有线电视主、支干线往往是采用凌空高架的方式,所以,一旦出现这类人为故障则很难找到短

Cable television, as its name implies, is a cable that transmits television signals. The longer the line, the higher the failure rate. Among them, the most troublesome is man-made cable short circuit fault. For example, someone stabbed a signal, staked a pin in the cable, and broken the pin in the cable, causing the wire and shield to short-circuit. Some people shoot birds, shoot the cables with air guns, and shoot the lead bullets into the cables to form a short circuit. These phenomena happen frequently and cause serious signal attenuation, which directly affects the normal operation of the cable television network. As the main cable TV, the main line is often used volley overhead way, so in the event of such human failure is difficult to find short