一、概述 为了在电视接收机屏幕上得到高质量的重现图象,在调试接收机时,常常采用各种图象信号发生器。例如多波群信号,灰度阶梯信号,方格,棋盘,园等信号,以及彩色电视所用的彩带信号等。用这些信号调试电视接收机既直观,又准确,而且能迅速发现接收机的毛病所在。棋盘方格信号是调节黑白电视接收机比较适宜的一种电视信号,它在电视机屏幕上产生图一所示图案。用此信号可以很方便地调整电视机通道特性,校正行、帧幅度及线性,因 I. Overview In order to obtain high-quality reproduced images on the television receiver screen, various image signal generators are often used when debugging the receiver. Such as multi-wave group signals, gray-scale signal, checkered, checkerboard, garden and other signals, as well as color television signals used in ribbons. Debugging TV receivers with these signals is both intuitive and accurate, and it quickly identifies the problems with the receiver. Checkerboard square signal is to adjust the black-and-white television receiver is a more appropriate type of television signal, which produces a picture on the television screen shown in the pattern. With this signal you can easily adjust the TV channel characteristics, correction of line, frame rate and linearity, because