光笔控制的电视跟踪窗

本文叙述了一种付诸实际应用的光笔控制的数字式电视跟踪窗.萧先说明了电视跟踪窗在电视跟踪测量系统中的作用,电视跟踪窗的种类及其比较,自动窗与手动窗的区别,以及带边框的数字式跟踪窗的结构原理.然后叙述数字式电视跟踪窗的光笔控制,其中包括光笔的结构和定位原理,光笔控制跟踪窗位置的电路结构及工作原理,使用光笔中要注意的问题.

A TV Tracking Window Controled by Light Pen

This paper describes a type of digital TV tracking window controled by Iight pen for practical applications.At first the functions of TV tarcking Window in TV tracking system,type of TV tracking window,the difference between automatic Window and hand window,and the structure principle of digital tracking window with side-frame have been given.Then the light Pen control of TV tracking window,including the principles of light pen structure,positioning,circuit structure and operation principle of tracking window position controled by light pen and some cautions in the use of light pen are described.