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Function Display
NOTE: Transponder options are normally set at time of installation. For changes to the GTX 327 parameters, contact your Garmin authorized service center.
PRESSURE ALT: Displays the altitude data supplied to the GTX 327 in feet, hundreds of feet (i.e., flight level), or meters, dependent upon installation configuration.
FLIGHT TIME: Displays the Flight Time, configured during installation as MANUAL, CLEAR, or ACCUMULATE (see Timer Operation for details). Timer is controlled by the START/STOP and CLR keys when configured as Manual.
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 during installation configuration. Contrast is controlled by the 8 and 9 keys.
DISPLAY: This page is only displayed if manual backlighting mode is selected.during installation configuration. Backlighting is controlled by the 8 and 9 keys.
Altitude Trend Indicator
When the PRESSURE ALT page is displayed, an arrow may be displayed to the right of the altitude, indicating that the altitude is increasing or decreasing. One of two sizes of arrows may be displayed depending on the vertical speed rate. The sensitivity of these arrows is set during transponder installation.
Automatic ALT/STBY Mode Switching
If the GTX 327 is configured with Automated Airborne Determination, ALT mode selection occurs when
ADS-B Control (GDL 90)
Automatic Dependent