Analogue Vs Digital Signalling

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Analogue
Signals are continuously variable, meaning they can take a range of values and any value in between
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They take up more bandwidth to transfer signals
They are not high tolerance as mistakes can easily be made, e.g. (0.00564 could easily be 0.00563)
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Used in earlier technologies such as older televisions signals and telephone networks, in order to vary the frequency of the signal
Greenhouses may use analogue signal readers to take numerical data such as the temperature
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Digital
These are discrete signals that contain two states.
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These states help to represent numbers, letters, images, sound and programs.
This is high tolerance as the two states cannot be mistaken.
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This signal occupies a smaller bandwidth and is commonly used for radio and television broadcasting, as more programs can be squeezed in for viewers
Digital watches use this signals and digital thermostats
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Other cards in this set

Card 2

Front

They take up more bandwidth to transfer signals

Back

They are not high tolerance as mistakes can easily be made, e.g. (0.00564 could easily be 0.00563)

Card 3

Front

Used in earlier technologies such as older televisions signals and telephone networks, in order to vary the frequency of the signal

Back

Preview of the front of card 3

Card 4

Front

Digital

Back

Preview of the front of card 4

Card 5

Front

These states help to represent numbers, letters, images, sound and programs.

Back

Preview of the front of card 5
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