G1000TM
Transponder Pilot’s Guide

Record of Revisions 
Revision  Date of Revision  Revision Page Range  Description 
A B C D  04/30/04 11/29/04 05/3/05 07/20/05  5-1 – 5-7 5-1 – 5-7 5-1 – 5-5 5-1 – 5-5  Initial release. Added information on .ight ID reporting. Changes per Software 4.02. New cover plus minor edits. 

5.1 GTX 33 TRANSPONDER

The GTX 33 transponder is integrated into the G1000 system, offering Mode A, Mode C and Mode S interrogation and reply capabilities. This pilot’s guide provides a description of the transponder operation and information on Mode S capability.
The transponder controls are located on the G1000 Primary Flight Display (PFD) on the lower portion of the screen (see .gures below).
TRANSPONDER SOFTKEYS
The transponder function spans three levels of softkeys; the Top-level, the Mode Selection and the Code Selection softkeys.
When the Top-level XPDR softkey is pressed, the following softkeys appear in the softkey bar (Figure 5.1.2): STBY, ON, ALT, VFR, CODE, IDENT, BACK.
When the CODE softkey is pressed, the number softkeys appear in the softkey bar (Figure 5.1.3): 0, 1, 2, 3, 4, 5, 6, 7, IDENT, BKSP, BACK. The digits 8 and 9 are not used for code entry. Pressing the BKSP softkey backs up code selection to the previous digit.
Pressing the BACK softkey during code selection reverts to the MODE Selection softkeys (Figure 5.1.2). Pressing the BACK softkey during Mode Selection reverts to the Top-level softkeys (Figure 5.1.1).

NOTE: After 45 seconds of transponder softkey inactivity, the system reverts back to theTop-level softkeys (Figure 5.1.1).

TRANSPONDER STATUS BAR
The Transponder Status bar is located to the left of the System Time box and contains, a four-digit code .eld, a mode .eld and a reply status indicator. In Standby mode, both the code .eld and the mode .eld appear in white. In all other modes, these .elds appear in green.

Transponder Status Bar

Pressing CODE

Pressing BACK
Figure 5.1.2  Mode Selection Softkeys
displays the Code

displays the Mode
Selection softkeys

Selection softkeys

Figure 5.1.3  Code Selection Softkeys

190-00382-00 Rev. D Garmin G1000 Transponder Pilot’s Guide

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 identi.er capability

.  
Flight ID reporting

.  
Altitude reporting

.  
Airborne status determination

.  
Transponder capability reporting

.  
Mode S Enhanced Surveillance (EHS)
requirements

.  
Acquisition squitter

Flight ID Reporting – The G1000 transponder reports aircraft identi.cation as either the aircraft registration or a FLT ID (Flight Identi.cation). The system is con.gured for either option by an authorized Garmin service center.
If con.gured for Flight ID entry, the pilot must enter the appropriate .ight ID on the PFD. After the correct Flight ID is entered, the aircraft identi.cation reported in response to ATC radar interrogations is properly correlated with the associated call sign for voice communication.
The .ight ID is not to exceed seven (7) 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 con.guration, the transponder then reports the aircraft registration number to ATC.
　
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