Other Flashcards
What is telecommunications:
Sending, receiving and storing information
What information can be used in telecommunications:
Sound, images and data
How is the information transported in telecommunications:
Wires, radio waves or optical fibres
What types of data can be used in telecommunications;
Analogue and digital
What do analogue signals convey:
Sound, light or temperature information
Are analogue signals continuous or discontinuous:
Continuous
Analogue signals can be converted to:
Electrical signals
How are analogue signals transported:
Copper wire or radio waves (has to be converted)
What do digital waves convey:
0 and 1
Are digital signals continuous or discontinuous:
Discontinuous
How are digital signals transported:
Electrical signals, radio waves or optical fibres
How are digital signals better than analogue signals:
No loss of quality and more information
Define attenuation:
When a signal loses strength as it travels
What does amplification do to an analogue signal:
Makes it louder but also increases the attenuation
Why doesn’t amplification affect digital signals:
It does, but the signal can be regenerated so the end signal has the same quality as the original
