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School/Analyse/Layers/1. Physical Layer.md
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@@ -18,9 +18,14 @@ Waves, like you would see on a lake, or in electrical cables are made when a phy
Waves by them self store no real information.
## Signal
A signal is a wave that holds information. (wave + data = signal)
A signal is a wave (carrier) that holds information. (wave + data = signal)
## Encoder
A encoder converts
The carrier is a type of wave we add our information to. In most cases a sine wave is used as a carrier wave,
![[Pasted image 20211103214144.png]]
![[encoder.png]]
A encoder converts analog or digital information in signals that can be transmitted across different [[Comminucation Mediums]]
The process of adding data to a carrier wave is called Modulation
## Modulation