Digital and analog systems need an interpreter in order to understand each other. and that's where the modem (short for Modulator DEModulator) comes.

数字系统与模拟系统之间需要有一个转换器，以便使两种系统相互理解。调制解调器的作用就在于此。

youdao

The remote sensing satellite earth station is composed by antenna, feed subsystem , servo subsystem, receiver, station manage subsystem, modulator, demodulator, recorder and quick view equipment.

遥感卫星地面站主要由天馈线、伺服分系统、接收分系统、站控分系统、调制器、解调器、记录设备和快视设备等构成。

youdao

This paper designed a full digital modulator and a full digital demodulator for the millimeter wave communication machine based on the soft radio theory.

本文利用软件无线电的思想为毫米波保密通信机设计了一个全数字的调制解调器。

youdao