User Guide

Garmin G1000 Pilot’s Guide for the Diamond DA42
190-00649-00 Rev. A4-40
AUDIO PANEL AND CNS
TRANSPONDER DATA BOX
The Transponder Data Box is located to the left of the System Time Box. The data bar displays a four-digit
code field, a mode field and a reply status indicator. In Standby Mode, both the code field and the mode field
appear in white. In all other modes, these fields appear in green.
MODE S FEATURES
The GTX 33 Transponder is equipped with selective addressing or Mode Select (Mode S), capability. Mode S
functions include the following features:
• Level-2 reply data link capability (used to exchange information between aircraft and various ATC facilities)
• Surveillance identifier capability
• Flight ID reporting – The G1000 transponder reports aircraft identification as either the aircraft registration or
a FLT ID (Flight Identification). The system is configured for either option by an authorized Garmin service
center.
• 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.
If configured for Flight ID entry, the pilot enters the appropriate flight ID on the PFD. After the correct Flight
ID is entered, the aircraft identification reported in response to ATC radar interrogations is properly correlated
with the associated call sign for voice communication.
The Flight ID is not to exceed seven characters. No space is needed when entering Flight ID. When a Flight
ID contains a space, the system automatically removes it upon completion of Flight ID entry. (See ICAO
documents 8168, 4444, and 8585 for further details).
If the Flight ID is set to ‘SAME AS TAIL’ no entry is required. In this configuration, the transponder reports
the aircraft registration number to ATC.
The purpose of acquisition squitter is to enable Mode S ground stations and Traffic Collision Avoidance System
(TCAS) equipped aircraft to recognize the presence of Mode S-equipped aircraft for selective interrogation.