User Guide

190-00552-00 Rev. A
Garmin G1000 Pilot’s Guide for the Columbia 350/400
4-35
AUDIO PANEL AND CNS
4.7 GTX 33 MODE S TRANSPONDER
The GTX 33 Transponder is integrated into the G1000 System, offering Mode A, Mode C, and Mode S
interrogation and reply capabilities. This section 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 the following figures).
TRANSPONDER SOFTKEYS
Transponder function spans three levels of softkeys: Top-level, Mode Selection, and Code Selection.
When the top-level
XPDR Softkey is selected, the following softkeys appear (Figure 4-41): STBY , ON , ALT ,
VFR , CODE , IDENT , BACK .
Figure 4-42 Code Selection Softkeys
Figure 4-41 Mode Selection Softkeys
Figure 4-40 Top-Level Softkeys
Transponder Data Box
Selecting BACK
displays the Top-
level softkeys
Selecting BACK
displays the Mode
Selection softkeys
Selecting XPDR
displays the Mode
Selection softkeys
Selecting CODE
displays the Code
Selection softkeys
When the CODE Softkey is selected, the number softkeys appear (Figure 4-42): 0 , 1, 2 , 3 , 4 , 5 , 6 , 7 , IDENT ,
BKSP, BACK . The digits 8 and 9 are not used for code entry. Selecting the BKSP Softkey backs up code
selection to the previous digit.
Selecting the
BACK Softkey during code selection reverts to the Mode Selection Softkeys (Figure 4-41).
Selecting the BACK Softkey during mode selection reverts to the top-level softkeys (Figure 4-40).
After 45 seconds of transponder softkey inactivity, the system reverts back to the top-level softkeys
(Figure 4-40).