GTX 330/330D Installation Manual 190-00207-02
Page 5-4 Rev. U
5.1.3 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.
5.2 Configuration Pages
The configuration descriptions given in this section reflect software version 6.00 or
higher. Software version 4.01 or later is required for Mode S Enhanced Surveillance
(EHS).
When connecting the GTX 330 to a NAV/COM/GPS unit such as a GNS 480 (CNX80) or
GTN 6XX/7XX unit, the transponder can be configured from either the NAV/COM/GPS
unit or the GTX 330. Although possible from the NAV/COM/GPS unit, configuration from
the GTX 330 front panel offers more functions and easier to interpret displays.
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