设计了一种数字计算机系统电路板测试仪，提出了一种基于故障诊断的电路板测试方法。
Presents briefly and talks about the design method of digital system based on FPGA, and summarizes the steps about the design of digital system based on FPGA.
该方法能准确识别出指针式仪表示数，有利于信号采集进数字计算机系统，基本能实现在线测试。
The method can recognize the readings, which make it easy for the signals to be collected into computer system, and can realize on-line recognition.
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