Garmin G3X Pilot’s Guide190-01115-00 Rev. K127CNS InterfaceSystemOverviewFlightInstruments EISCNSInterfaceGPSNavigationFlightPlanningHazardAvoidanceAdditionalFeatures AFCS Annun/Alerts Appendix IndexTRANSPONDER MODE SELECTIONThe transponder mode will automatically switch between GND Mode and ALT Mode.The mode can also be manually set using the softkeys.Selecting a transponder mode:1) From the full-screen PFD and/or the split-screen PFD Page, press the XPDRSoftkey.2) Press the MODE Softkey.3) Press the desired mode softkey (STBY / GND, ON, or ALT). Pressing andholding the STBY Softkey activates Ground (GND) Mode and the STBYSoftkey becomes the GND Softkey.GROUND MODEGround Mode is normally selected automatically when the aircraft is on the ground.The transponder powers up in the last mode it was in when shut down. To manuallyselect Ground Mode, press and hold the STBY Softkey. A green GND indication andtransponder code appear in the mode field of the Transponder Data Box and the STBYSoftkey becomes the GND Softkey. In Ground Mode, the transponder does not allowMode A and Mode C replies, but it does permit acquisition squitter and replies todiscretely addressed Mode S interrogations.Deselect (press) the GND Softkey to return to Standby Mode.STANDBY MODE (MANUAL)Standby Mode can be selected at any time by pressing the STBY Softkey. In Standby,the transponder does not reply to interrogations, but new codes can be entered. WhenStandby Mode is selected, a white STBY indication and transponder code appear in themode field of the Transponder Data Box.MANUAL ON MODEON Mode can be selected at any time by pressing the ON Softkey. ON Modegenerates Mode A and Mode S replies, but Mode C altitude reporting is inhibited. InON Mode, a green ON indication and transponder code appear in the mode field ofthe Transponder Data Box.
