Engineering part 3

The third part of the engineering system is the Telecommunication.
Telecommunication is the assisted transmission of signals over a distance for the purpose of communication. Telecommunication has 3 main parts:
-a transmitter that takes information and converts it to a signal;
-a transmission medium that carries the signal;
-a receiver that receives the signal and converts it back into usable information.

A network is a collection of transmitters, receivers and transceivers that communicate with each other. Digital networks consist of one or more routers that work together to transmit information to the correct user.

A channel is a division in a transmission medium so that it can be used to send multiple streams of information.

The shaping of a signal to convey information is known as modulation.
Modulation can also be used to transmit the information of analogue signals at higher frequencies. This is helpful because low-frequency analogue signals cannot be effectively transmitted over free space.