Using-Altium.md

@@ -89,5 +89,20 @@ Once you have all your components on the schematic, you can connect them using t
     - Clearance Rules - these set how much clearance you want to give different components (like space between a route and a pad). Under Clearance Rules, select the Ignore Pad to Pad clearances within a footprint. This will clear up if there is a clearance error within a component
     - Under Differential Pairs Routing - make your rule where the object matches Diff Pair Class then the name of your diff pair class or All Differential Pairs
 
+- Differential Pair routing:
+    Sometimes you need to have routes that are the same length to preserve the signal that passes through it.
+
+To do this:
+    - In your schematic file, click Place, highlight over Directives, and select Differential Pair.
+    - Click on the two wires you want to be a differential pair - have the same length - this will leave a little red symbol on each of them.
+    - Click on the red icons and make sure the labels are the same as each other
+    - ###Rename the two wires with nets so they have the same name (probably just the label name) with one having an underscore N and the other with an underscore P (for negative and positive) Ex. RF_N and RF_P
+    - Save the schematic, open the PCB file, and import the changes
+    - Change the routing option to Interactive Differential Pair Routing (You can change this through the 
+    - Workspace Ribbon or through the Route button at the top
+    - You can try different corner types here as well until you find one that looks good by using shift + space.
+    - Click on one of the pads you want to route from and it should automatically start routing the other one too. Connect to the end pad and it should create two traces close together.
+    - Check to make sure the two traces are the same length by hovering over the traces and it should show that they are the same or very, very close to the same length.
+
 
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