论文部分内容阅读
一、概述S-306图像中频扫频信号发生器、S-307视频扫频信号发生器和S-308伴音中频扫频信号发生器是一套新颖的电视扫频信号发生器.这套仪器与S-309显示器或一般示波器配用,可清晰地显示出电视机通道板的图像中频特性曲线、视放特性曲线和伴音中频特性曲线.它专门用于调试及维修电视机的通道板.这套仪器与一般扫频仪(如BT-3、BT-7、BT-8等)相比,具有以下新颖之处:1.调整图像中频特性曲线几个吸收点很方便图像中频吸收回路的调整是很重要的,但由于各吸收点输出电压很小,各点不易观察和调整.S-306采用键控信号的方法,它的基本原理是用三角波扫描,在扫
I. Overview S-306 image IF sweep signal generator, S-307 video sweep signal generator and S-308 audio IF sweep signal generator is a new set of TV sweep signal generator. S-309 display or general oscilloscope with a clear display of the TV channel plate image IF curve, viewing curve and audio IF characteristics. It is specifically used to debug and repair TV channel board. The instrument has the following novel features when compared with conventional scanners (such as BT-3, BT-7, BT-8, etc.): 1. Adjusting the MF curve of the image is convenient. Very important, but because of the absorption point of the output voltage is small, the point is not easy to observe and adjust .S-306 using key signal method, which is the basic principle of triangular wave scanning, scanning