本文还对汇流条控制器的模拟量输入通道、数字量输入通道、数字量输出通道进行了自检测设计，包括硬件BIT设计和软件实现方法。
The built-in test (BIT) design of hardware and software is also introduced in this dissertation. The BIT design consists of analog inputs, digital inputs and digital outputs.
本卡不但具有四路同步A/D转换功能，而且还具有两路D/A输出功能和八路数字量输入输出功能。
This card not only has the function of four-channel simultaneous sampling, but also has two channels for D/A, eight channels for digital I/O.
测控系统以工控机作为硬件基础，分为模拟量输入通道和数字量输出通道两部分。
The hardware components of the measurement and control system based on industrial personal computer consist of the analog input channel and the digital output channel.
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