Operating Instructions; Reference Documents; Table 1-7 Reference Documents - Garmin GTX 23 Installation Manual

1.10 Operating Instructions

The GTX 23 is a remote-mount LRU with no user controls or indicators. All user interface is accomplished
through a compatible display device. Although different displays will handle the transponder interface
differently, all will typically have the following user inputs:
Mode Selection:
1. Standby Mode: In Standby Mode, the GTX 23 will not reply to interrogations.
2. ON Mode: In ON mode, the GTX 23 will generate Mode A and Mode S replies, but Mode C altitude
reporting is inhibited.
3. Altitude Mode: In Altitude Mode, Mode C altitude reporting is enabled.
Code Selection:
1. Entering a Code: A total of 4096 discrete identification codes can be entered.
2. VFR Code: Selecting VFR changes the Code to the pre-programmed VFR code.
Ident Function:
Selecting the Ident function sends an ID indication to ATC for 18 seconds. This ID indication distinguishes
your transponder from all others on the air traffic controller's radar screen.
NOTE
For detailed operating instructions, refer to the pilot's guide for the equipment that
provides the GTX 23 user interface. The G3X Pilot's guide (190-01115-00) provides
information for operating a GTX 23 in a G3X system.

1.11 Reference Documents

The following publications are sources of additional information for installing the GTX 23. Before
installing the unit, the technician should read all relevant referenced materials along with this manual.
Part Number
190-01115-01
190-00906-01
Rev. C

Table 1-7 Reference Documents

Document
G3X Installation Manual
GTX 23 Installation Manual
Page 1-9