Garmin G3X Installation Manual page 157

With the aircraft stationary, initiate the GSU 73 AHRS magnetometer calibration procedure as follows:
1. Enter configuration mode by holding down the left-hand softkey while powering on the GDU
37X (if needed).
2. Use the FMS Joystick to select the GSU Page (if needed).
3. Unlock the GSU Page by pressing softkeys 2, 3, 4 in order (if needed).
4. Ensure that all the required status boxes are checked (Tables 9-2 and 9-3).
5. On the GSU Status Page, use the FMS Joystick to select MAGNETOMER.
6. Use the FMS Joystick to highlight the Calibrate button, press the ENT Key.
G3X Installation Manual – Post Installation Checkout and Calibration Procedures
190-01115-01
Page 9-17
Revision E