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VXI高速数字测试模块主要用于数字板卡和数字系统的测试,也具有逻辑分析仪和数字信号发生器的功能。本文讲述了基于VXI总线的高速数据测试模块硬件电路设计。设计包括VXI总线接口电路,高速数据通道(FDC)传输电路,本地数据处理电路和64路可编程I/O电路。充分结合VXI消息基接口的优点,实现了高速数据测试;实时数据比较和故障诊断功能,并对设计过程存在的问题进行讨论。
VXI high-speed digital test module is mainly used for digital board and digital system testing, but also has a logic analyzer and digital signal generator functions. This article describes the VXI bus-based high-speed data test module hardware circuit design. Design includes VXI bus interface circuit, high-speed data channel (FDC) transmission circuit, local data processing circuit and 64 programmable I / O circuits. Fully combines the advantages of VXI message-based interface to achieve high-speed data testing; real-time data comparison and fault diagnosis functions, and discusses the problems existing in the design process.