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Page 8-6 G3X Installation Manual – Post Installation Checkout and Calibration Procedures
Revision A 190-01115-01
8.3.1 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. Ensure that all the required status boxes are checked (Tables 8-2 and 8-3). The GMU 44 and
GSU 73 units must be communicating with the GDU 37X, and the GPS antenna must have
clear view of the sky or a GPS repeater to produce positive status indications.
5. Use the FMS Joystick to select AHRS ORIENTATION (if not already selected).
6. Use the FMS Joystick to highlight the Calibrate button, press the ENT Key.
7. Determine the direction the connectors of the GSU 73 are facing per the on-screen
instructions.
8. Use the FMS Joystick to highlight the Calibrate button at the bottom of the display, press the
ENT Key to begin the calibration.