Garmin G3X Pilot's Manual page 134

CNS Interface
• Flight ID (Flight Identification) reporting - The Mode S Transponder reports
identification as either the aircraft registration or a unique Flight ID.
• Altitude Reporting
• Airborne status determination
• Transponder capability reporting
• Mode S Enhanced Surveillance (EHS) requirements
• Acquisition squitter - Acquisition squitter, or short squitter, is the transponder
24 bit identification address. The transmission is sent periodically, regardless
of the presence of interrogations. The purpose of the acquisition squitter is to
enable Mode S ground stations and aircraft equipped with a Traffic Avoidance
System (TAS) to recognize the presence of Mode S-equipped aircraft for selective
interrogation.
When configured the transponder interface is displayed on three levels of softkeys
on the PFD: Top-level, Mode Selection, and Code Selection. When the top-level XPDR
Softkey is pressed, the associated transponder softkeys appear: IDENT, CODE, and
MODE.
When the CODE Softkey is pressed, the pilot can enter the desired code using the
FMS Joystick.
Pressing the IDENT Softkey initiates the ident function and reverts to the top-level
softkeys.
With a remote transponder configured, the #2 PFD Softkey becomes XPDR (if
a navigation source is not selected) or XPDR/CRS (when the pilot can control the
navigation course).
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Transponder
Transponder Data Box (Split-Screen)
Garmin G3X Pilot's Guide
Code
Mode
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Status
190-01115-00 Rev. J