在《彩色电视机原理与维修》课程的教学中,三基色信号、由三基色信号复合成的亮度信号、由三基色信号与亮度信号形成的色差信号等内容较为抽象,其波形图的形成过程不易理解,也难以在一般的实验室里实验。用Protel99se软件对该过程进行仿真教学,能直观地显示出相应的波形及各波形之间的关系,有助于学生对该部分知识的理解,从而提高教学效果。 In the teaching of “color television set principle and maintenance”, the three primary color signals, the luminance signal composed of the three primary color signals, the color difference signals formed by the three primary color signals and the luminance signal are relatively abstract and the formation process of the waveform thereof Not easy to understand, it is difficult to experiment in a general laboratory. Protel99se software to simulate the process of teaching, can intuitively display the corresponding waveform and the relationship between the waveforms, help students understand the part of the knowledge, thereby enhancing the teaching effectiveness.