Abstrct: the electrical parameters Tester through AT89C51 SCM as a core element of control by the analog switch HCF4051 constitute a range digital multimeter.
本电参数测试仪通过AT 89 C 51单片机作为核心的控制元件，由模拟开关hcf 4051构成自动量程数字万用表。
2
The principle and constitution and the existed problems of analog measurement mode used in the encoder tester are presented.
介绍了码检仪采用模拟量测量方式的原理、组成及存在的问题；
3
Although it does not display very different controller details, the Joystick Tester app still allows you to check the functions of both analog and digital USB devices.