近年来,虽然因有线电视传输系统的交流声干扰故障的发生率逐步下降,但因有线电视系统投入运行后,随着时间的推移,系统设备的老化,气温变化以及其他人为或自然原因影响必将出现各种故障,且用户端线路或设备引起的交流声干扰故障逐年上升,影响用户收视效果。此类故障的原因很多。下面笔者在此根据自己的工作经验总结出以下一些故障的分析与排除方法,与大家分享。对于用户端设备引起的交流声干扰,必须通过分支线路排 In recent years, although the incidence of malfunctions caused by hum interference caused by the cable television transmission system has been gradually reduced, the aging of the system equipment, the temperature change, and other man-made or natural causes will inevitably result from the time when the cable television system is put into operation A variety of faults will occur, and the hum disturbances caused by lines or devices on the subscriber line increase year by year, affecting user ratings. There are many reasons for such failures. The following author here based on their own work experience summed up the following analysis and troubleshooting of the failure to share with you. The hum noise caused by the customer premise equipment must be routed through the branch lines