# 3.5. Calibration (operate when necessary)

Click the Advanced Settings button to open the Advanced Settings page.

<figure><img src="https://1851866520-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIWx9bMxy88NRLPUcOemU%2Fuploads%2F7WpHdg0JuU29PW2wxV9l%2Fimage.png?alt=media&#x26;token=1bcd8943-e21f-42fc-b6f4-d1b0a99015a2" alt=""><figcaption></figcaption></figure>

3.5.1. Compass calibration.

{% hint style="info" %}
Compass calibration is required when drone is equipped with one GPS module, if drone is with RTK or D-GPS, compass calibration is no longer needed.
{% endhint %}

<figure><img src="https://1851866520-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIWx9bMxy88NRLPUcOemU%2Fuploads%2FLvTCYzKu7gx0gLu6SK3y%2Fimage.png?alt=media&#x26;token=515d28d0-f0b7-49b4-9191-9c5fe11ae752" alt=""><figcaption></figcaption></figure>

3.5.2. Remote control mode check

{% hint style="info" %}
Change the flight mode on radio controller and chcek from the ground station whether the mode on ground station software is consistent.
{% endhint %}

<figure><img src="https://1851866520-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIWx9bMxy88NRLPUcOemU%2Fuploads%2FiS811qijSzFTU3LuvsLN%2Fimage.png?alt=media&#x26;token=8aed76dd-ead3-47b1-85ac-60706e6160e3" alt=""><figcaption></figcaption></figure>