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Analogue and Digital Signals

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by

Alun King

on 1 October 2013

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Transcript of Analogue and Digital Signals

Analogue and Digital Signals
Digital Signals
Discrete, stepped signal

Imagine communicating using morse code - clear defined signals

Less noise interference;
Can implement data integrity checks
Examples
Human voice - analogue
Temperature - analogue
CD music - digital data
Telephone - analogue
Internet - digital (via modem)
Advances in Tech
Digital TV replacing analogue (terrestrial)
DAB Radio replacing FM radio

Clearer signals, greater detail, less noise.
Analogue Signals
Older transmission methods used analogue signals.

They are a continuous signal

When transmitted from a distance, noise causes interference
Full transcript