中水一局有线电视系统是企业网络 ,经改造升级后 ,信号质量极大改善。但过了不久 ,就接到多户投诉 ,反映电视图像上有黑或白横杠横带干扰。经实地观察 ,画面上确有向上或向下移动的横杠横带干扰 ,严重时切割画面无法正常收看 ,伴音也受影响 ,波及几栋楼。凭经验初步判定可能是 Bureau of a water cable television system is an enterprise network, the transformation and upgrading, the signal quality greatly improved. However, shortly after receiving complaints from multiple households, there were black and white horizontal bar interferences on the television images. The field observation, the picture does move up or down the horizontal bar interference, the serious cut screen can not be normal watching, sound is also affected, spread to a few buildings. Preliminary experience may be