高频机对有线电视干扰的特性及抑制措施

The Characteristic and Prevention of Disturbance of High Frequency Sealer to CATV

采用理论分析、数据测试和现场考察等方法对高频机干扰有线电视的规律进行探讨。高频机产生的各次高次谐波是干扰源 ,干扰的实质是特殊的交流声调制 ,干扰信号主要是通过空间辐射向远处传播 ,有线电视受干扰的主要原因是自身的屏蔽出了问题。

The rule of the disturbance of high frequency sealer to CATV was compresively studied by means of theoretical analysis, data measurement, and spot observation. According to the study, the high order syntonic waves are the source of disturbance, the essence of which is a special kind of hum modulation. Since signal is transferred by radiation, CATV is disturbed due to the failure of shield. A simple and effective measure to prevent or lighten this disturbance was proposed as well.