Garmin G3X Touch Pilot’s Guide 190-01754-00 Rev. L136CNS InterfaceSystemOverviewFlightInstrumentsEISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeaturesAFCSAnnun/AlertsAppendixIndexTransponder tuning for panel mount transponders like GTX 327 (Mode C) is alsosupported.TRANSPONDER CODE AND MODE SELECTIONThe transponder mode will automatically switch between GND Mode and ALT Mode.Selecting a transponder code or mode:1) Touch the transponder data box on the PFD.2) Use the keypad to enter a code and touch Enter.Or:Touch STBY, GND/ALT, or ON to change the mode, and touch Enter.Transponder Code, Mode, and Flight ID Entry
