There is a wide range of satellite modems from cheap devices for home Internet access to expensive multifunctional equipment for enterprise use.

A satellite modem's main function is to transform an input bitstream to a radio signal and vice versa.

The main functions of a satellite modem are modulation and demodulation.

Frame formats that are supported by various satellite modems include:

A block diagram of a generic satellite modem is shown on the image.

A satellite modem is not the only device needed to establish a communication channel.

There are also industrial satellite modems intended to provide a permanent link.

In order to access the Internet you need to connect a special satellite modem to your computer.

This technique was proven in the early days of satellite modems in the late 1970s.

In addition to the receiver, it has a WiFi router and satellite modem.