diff --git a/.obsidian/workspace b/.obsidian/workspace
index 2cac0cc..c6ce18c 100644
--- a/.obsidian/workspace
+++ b/.obsidian/workspace
@@ -88,6 +88,7 @@
   "active": "bc6e8ad9aa0f44c3",
   "lastOpenFiles": [
     "School/Analyse/Layers/1. Physical Layer.md",
+    "School/Analyse/Images/encoder.png",
     "School/Analyse/Network Types.md",
     "School/Analyse/Layers/5. Session Layer.md",
     "School/Analyse/Layers/6. Presentation Layer.md",
@@ -95,7 +96,6 @@
     "School/Analyse/Layers/4. Transport Layer.md",
     "School/Analyse/Layers/3. Network Layer.md",
     "School/Analyse/Layers/2. Datalink Layer.md",
-    "School/Analyse/OSI Model.md",
-    "School/Analyse/Comminucation Mediums.md"
+    "School/Analyse/OSI Model.md"
   ]
 }
\ No newline at end of file
diff --git a/Pasted image 20211103214144.png b/School/Analyse/Images/encoder.png
similarity index 100%
rename from Pasted image 20211103214144.png
rename to School/Analyse/Images/encoder.png
diff --git a/School/Analyse/Layers/1. Physical Layer.md b/School/Analyse/Layers/1. Physical Layer.md
index 0ecd331..0303757 100644
--- a/School/Analyse/Layers/1. Physical Layer.md	
+++ b/School/Analyse/Layers/1. Physical Layer.md	
@@ -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]]
\ No newline at end of file
+![[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