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彩电行逆程脉冲(行同步信号)的作用有:(1)作为行AFC电路的比较信号,以保证图像在荧屏水平方向的正确位置;(2)作为色同步选通脉冲,以保证色选通门准时打开,让色同步信号通过;(3)作为行消隐信号,以保证在行逆程期间电子束
Color TV line back-pulse (line synchronization signal) role: (1) AFC circuit as a comparison signal to ensure that the image in the horizontal direction of the screen the correct location; (2) as a color gating strobe to ensure color selection Pass through the door on time, so that the color burst signal through; (3) as a line blanking signal to ensure that during the line reversal electron beam