Garmin G3X Installation Manual page 146

Furthermore, electrical changes to the installation that affect components within 10.0 feet of the GMU 44
magnetometer after the magnetometer calibration and magnetometer interference procedures were
completed will require a repeat of the magnetometer interference test. If new magnetic interference is
detected, it must be resolved and then the magnetometer calibration procedure must be repeated. Wiring
or grounding changes associated with a device located in the vicinity of the GMU 44 is a good example of
such a change.
9.3.1 Calibration Procedure A: AHRS ORIENTATION
1. Enter configuration mode by holding down the left-hand softkey while powering on the GDU
37X.
2. Use the FMS Joystick to select the GSU Page.
3. Unlock the GSU Page by pressing softkeys 2, 3, 4 in order.
4. Use the FMS Joystick to select AHRS ORIENTATION (if not already selected).
5. Use the FMS Joystick to highlight the Calibrate button at the bottom of the display, press the
ENT Key to begin the calibration.
Page 9-6
Revision E
G3X Installation Manual – Post Installation Checkout and Calibration Procedures
190-01115-01