# Trainer (Instructor)

The **Trainer** screen in Radio Settings is used to configure how the radio in Master mode will handle the signals from the radio in Slave mode.

<figure><img src="https://1252429118-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fc6eINXoIlfUG72tlmns6%2Fuploads%2Fgit-blob-1bd81e1c025e5ed2e3c5c84dfce642488ea64f9c%2Ftrainer2.png?alt=media" alt=""><figcaption><p>Trainer Screen</p></figcaption></figure>

For each of the four main control inputs (Ail, Ele, Thr, Rud), the following options can be configured (for each row, from left to right).

* **Mode -** How the radio in Master mode will handle the signals from the radio in Slave mode.
  * **OFF** - Stick values from the radio in Master mode will be used - no input from the radio in Slave mode.
  * **Add -** Adds the stick values from both the radios in Master and Slave modes.
  * **Replace -** Replaces the stick values from the radio in Master mode with the stick values from the radio in Slave mode. (Default)
* **Source channel** - The channel from the radio in Slave mode that is mapped the control input.
* **Weight** - Percentage of stick travel to use of the radio in Slave mode. Use negative values to change the stick direction.
* **Cal (calibrate)**- Sets the center stick value of the radio in Slave mode.
* **Multiplier** - This value changes the weight of all the sticks together.

{% hint style="info" %}
The trim from the radio in Master mode is usually used. Set the trims on the radio in Slave mode to their center.
{% endhint %}

{% hint style="info" %}
The radio in Master mode is the one that gets bound to the model receiver.
{% endhint %}
