# Filter Tab

## What can I filter?

Let’s suppose you want to find (a) specific packet(s) that get generated when you (for example) press a button, accelerate or lock the cars doors. The captured CAN traffic contains so much data that you can’t seem to find the packets easily. Let’s use the filter tab:

> - You can collect background noise containing CAN packets that are sent on the bus without any user interaction

> - After that, a variable amount of samples get captured. You have to perform the desired action in every sample - e.g. lock the doors in every sample.

> - As soon as all data has been captured, the filter tab begins to analyze it. It filters background noise out of each sample and tries to find packets that occur in every sample. These are most likely the packets your are looking for.

## How can I try this without a car or CAN device?

Use ICSim!