这种情况常见于模拟信号和数字信号用同一根电缆传输的场合。
This situation can occur in a large system where analog and digital signals are cabled together.
调制解调器是实现模拟信号和数字信号互相转变的设备，通过它用户的电脑才可连接因特网。
Modem enables the mutual conversion of analog signals and digital signals. Dial up connection is impossible without medom.
我是一个临时的控制器，需要监测的20个单独的按钮以及一个15 - 20模拟信号和数字信号楼。
I am building a temporary controller that needs to monitor 20 separate button pushes along with another 15-20 analog and digital signals.
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