Garmin G300 Installation Manual page 77

5. Use the FMS Joystick to select MAGNETOMETER INTERFERENCE TEST.
6. Use the FMS Joystick to highlight the Calibrate button, press the ENT Key.
7. Ensure that the aircraft has been properly prepared per the on-screen instructions. See Table
9-2 for a sample test sequence.
G300 Installation Manual – Post Installation Checkout and Calibration Procedures
190-00921-01
Page 9-21
Revision A