Accessing System Functionality; Menus - Garmin G3X Touch Pilot's Manual

If GPS input fails, the AHRS can continue to provide attitude and heading information
to the PFD as long as magnetometer and airspeed data are available and valid.
If the magnetometer input fails, the AHRS continues to output valid attitude
information; however, the heading output on the PFD Page is flagged as invalid with
a red 'X'.
Failure of the air data input has no effect on the AHRS output while AHRS is receiving
valid GPS information. Invalid/unavailable airspeed data in addition to GPS failure
results in loss of all attitude and heading information. Likewise, loss of magnetometer
(heading) data, in combination with loss of GPS data results in a loss of all attitude
and heading information.
In installations that include multiple AHRS units (G3X Touch supports up to three
AHRS sources) if data from an AHRS source is lost the G3X Touch will automatically
switch sources, when a failure is detected. Reversionary sensor selection is annunciated
in a window on the right side of the PFD. These annunciations reflect reversionary
sensors selected on the PFD. Pressing the Menu Key while on the PFD page accesses
the PFD Options page, the desired ADAHRS source (AUTO, ADAHRS1, or ADAHRS2).
This allows for manual switching of the ADAHRS sensors being viewed on the PFD. The
GPS sensor cannot be switched manually.

1.6 ACCESSING SYSTEM FUNCTIONALITY

MENUS

The G3X Touch has a dedicated MENU Key. Press MENU once to display a context-
sensitive list of options for the page or the dedicated PFD. Press MENU twice to
display the Main Menu.
The Page Menu allows the user to access additional features or make setting changes
which specifically relate to the currently displayed page. The menu will display 'No
Options' when there are no options for the page selected.
190-01754-00 Rev. A Garmin G3X Touch Pilot's Guide
System Overview
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