3. Modulation & Multiplexing

Question 1

What is modulation?

Answer 1

Makes the information signal more compatible with the medium

Question 2

What is multiplexing?

Answer 2

Allows more than one signal to be transmitted concurrently over a single medium (i.e. to share the same channel)

Question 3

What are the basic types of multiplexing?

Answer 3

Frequency division; time division and code division

Question 4

What is baseband transmission?

Answer 4

Information that can be sent directly and unmodified over the medium OR can be used to modulate a carrier for transmission over the medium

Question 5

What is broadband transmission?

Answer 5

A transmission that takes place when a carrier signal is modulated, amplified and sent to the antenna for transmission

Question 6

What are modems?

Answer 6

Translate the data from digital to analogue and vice verse

Question 7

What is a carrier?

Answer 7

A high frequency signal that is modulated by audio, video or data.

Question 8

What is a radio frequency?

Answer 8

An electromagnetic signal that is able to travel long distances through space