Make sure the model is in a horizontal position on the ground, then put the throttle to 0, and keep the other channels in the centre position.
Move to [System] and enter the [SRX Stab] tool, then click [Start] and the blue LED light turns on. Once the blue LED starts flashing, we can calibrate the maximum travel of stick channels (excluding the throttle channel).
If the calibration is completed, the LED turns off and the servos react left and right to indicate the calibration process is completed.