Introduction
Communications systems are electrical engineering systems that allow us to send and receive signals across long distances. In this practice sheet, you will learn about the basics of communications systems and how they work.
Basics
- What is a communications system?
A communications system is a system that enables the transmission and reception of signals over long distances. It typically consists of a transmitter, a receiver, and a medium (such as a wire or a radio wave).
- What is the purpose of a communications system?
The purpose of a communications system is to enable the transmission and reception of signals over long distances. This could be used for a variety of purposes, such as sending messages, transmitting data, or providing a connection to the internet.
- What are the components of a communications system?
The components of a communications system include a transmitter, a receiver, and a medium (such as a wire or a radio wave). The transmitter is used to send the signal, the receiver is used to receive the signal, and the medium is used to carry the signal from the transmitter to the receiver.
- What is the difference between a transmitter and a receiver?
A transmitter is used to send the signal, while a receiver is used to receive the signal. The transmitter takes in a signal and encodes it into a form that can be transmitted over the medium. The receiver takes in the signal from the medium and decodes it back into its original form.
Practice Problems
- You want to send a signal across a long distance. What components of a communications system would you need?
You would need a transmitter, a receiver, and a medium (such as a wire or a radio wave). The transmitter would take in the signal and encode it into a form that can be transmitted over the medium. The receiver would take in the signal from the medium and decode it back into its original form.
- You want to send a message to a friend. How would you use a communications system to do this?
You would need to use a transmitter to encode the message into a form that can be transmitted over a medium, such as a wire or a radio wave. The receiver at the other end would take in the signal from the medium and decode it back into its original form. Your friend would then be able to read the message.
- What is the difference between a wired and a wireless communications system?
A wired communications system uses a physical medium, such as a wire, to carry the signal from the transmitter to the receiver. A wireless communications system uses a radio wave to carry the signal from the transmitter to the receiver.
