频率通过用可编程器件EPLD控制，而脉冲信号的宽度和幅度通过多路模拟开关和数字电位器调节。
The pulse frequency can be selected by EPLD. The voltage amplitude and pulse width of analog pulse can be adjusted by analog switches and digitally controlled potentiometers.
本文介绍了一种成功应用于PLC - 56b可编程序控制器中，可对多路模拟量信号进行检测与控制的有效方法。
In this paper, a method that's applied in PLC-56B for testing and controlling multi-way analogue signals is introduced.
具有多路模拟输入通道，配有键盘和数码显示器。
It has multiplex analogue input channels, keyboard and digital code display with strong ability to resist the disturbance.
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