数字示波器在电视技术实训教学中的应用

数字示波器在电视技术实训教学中的应用

内容简介：随着电子技术的发展,电视机内部电路不断更新,对电视机电路测量的要求越来越高.在电视技术教学和电视机故障检修中会发现,电视机维修综合测试仪、万用表等测量仪器进行故障判断,已不能较全面地进行参数测量.在电视机综合测试仪基础上增设了以AT89S52单片机为控制单元,通过高速A/D转换器AD0804实时采样输入信号,实现波形的实时采样存储并在液晶MGL（S）-240128T上显示的数字示波器.实验证明增设数字示波器进行故障检测,可提高电视技术的直观教学质量及电视机故障检测的准确性和维修效率.

Abstract：With the development of electronic technology and the constantly updated ofinternal circuit of the TV, the requirements of measurements for the TV circuit are increasingly enhanced. It is found that many parameters can not be completely measured by TV repair tester and multimeter and other measuring instruments in TV fault diagno- sis. Based on the TV integrated tester, a digital oscillograph is introduced. The AT89S52 MCU is a control unit of the digital oscillograph. The real - time sampling signals are inputted by the high speed A/D converter of AD0804, which results in the storage of real -time sampling of waveform and display on the LCD MGL(S) -240128T. It is proved that the digital oscillograph can improve the quality of TV technology visual teaching, the accuracy and the efficiency of maintenance of TV malfunction detection.

作者：张庆华, 刘彦甲,

关键词：数字示波器, AT89S52, AD0804, 电压检测, 电流检测