随着电子工业的发展,广播电视、工业电视、电化教学近几年内发展很快,电视设备越来越多.同时,中波广播功率也不断增加,空间辐射电磁波场强平均电平不断提高,对电视设备的干扰也越来越严重.在我们江苏电视台附近,中波辐射电磁场的场强已达到120分贝(1.2伏/米).随着干扰源、时间、地点和环境的不同,中波广播对电视视频信号的干扰程度和形式不完全一样,但反映在电视图象上基本是斜纹或竖纹干 With the development of the electronics industry, radio and television, industrial television and electrification teaching have developed rapidly in recent years with more and more television equipment. Meanwhile, the broadcasting power of China-Poland wave has been continuously increasing, the average level of space radiation electromagnetic field strength has been continuously increasing, The interference of TV equipment is more and more serious.At Jiangsu TV Station, the field strength of medium wave radiation electromagnetic field has reached 120 dB (1.2 V / m) .With the interference source, time, place and environment, The extent of the interference with the television video signal is not exactly the same as that of the broadcast video signal, but it is basically reflected in television images as twill or vertical stripes