190-00734-11
GTX 330/33 with ADS-B Out
Rev. 1
Maintenance Manual with ICA
3-3
Avoid selecting code 7500 and all codes in the 7600-7777 range. These codes trigger special indicators in
automated facilities. An aircraft’s transponder code is used for ATC tracking purposes, therefore exercise
care when making routine code changes.
Function Display
PRESSURE ALT
Displays the altitude data supplied to the GTX 330 in feet, hundreds of feet (i.e.,
flight level), or meters, depending on configuration.
FLIGHT TIME
Displays the Flight Time, controlled by the START/STOP key or by one of four
airborne sources (squat switch, GPS ground speed recognition, Airdata airspeed
recognition or altitude increase) as configured during installation. The timer begins
when the GTX 330 determines that the aircraft is airborne.
ALTITUDE
MONITOR
Controlled by START/STOP key. Activates a voice alarm and warning annunciator
when altitude limit is exceeded
OAT/DALT
Displayed when the GTX 330 is configured with temperature input. Displays
Outside Air Temperature and Density Altitude.
COUNT UP
TIMER
Controlled by START/STOP and CLR keys.
COUNT DOWN
TIMER
Controlled by START/STOP, CLR, and CRSR keys. The initial Count Down time
is entered with the 0 – 9 keys.
CONTRAST
This page is only displayed if manual contrast mode is selected in Configuration
mode. Contrast is controlled by the 8 and 9 keys.
DISPLAY
This page is only displayed if manual backlighting mode is selected in
Configuration mode. Backlighting is controlled by the 8 and 9 keys.
ADS-B TX
Controlled by START/STOP key. Starts/stops extended squitter function.
FLIGHT ID
If system is configured for FLT ID PWR-UP ENTRY at installation, the FLIGHT
ID entry page will be present on power up of GTX 330. This allows the pilot/crew to
enter the specific Flight ID for transmission to ATC interrogations.
3.2
GTX 33/33D
Figure 6 shows a screenshot of the GTX control page associated with the GTN 7XX series touchscreen
navigator. Refer to the following Garmin documents for details regarding the controls and their functions.
Table 2. GTN 7XX Series Transponder Control Reference Documents
Document Title
Document Number
GTN 725/750 Cockpit Reference Guide (CRG)
190-01007-04
GTN 725/750 Pilot’s Guide
190-01007-03
Figure 7 shows a screenshot of the GTX control page associated with the GTN 6XX series touchscreen
navigator. Refer to the following Garmin documents for details regarding the controls and their functions.
Table 3. GTN 6XX Series Transponder Control Reference Documents
Document Title
Document Number
GTN 625/635/650 Cockpit Reference Guide (CRG)
190-01004-04
GTN 625/635/650 Pilot’s Guide
190-01004-03
The document reference is online, please check the correspondence between the online documentation and the printed version.
