GTX 327 Installation Manual
Page 5-3
190-00187-02
Revision K
5.1.2 Function Display
PRESSURE ALT
Displays the altitude data supplied to the GTX 327 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 327 determines that the
aircraft is airborne.
COUNT UP TIMER Controlled by START/STOP and CLR keys.
COUNT DOWN
Controlled by START/STOP, CLR, and CRSR keys. The initial Count
TIMER
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.
5.1.3 Code Selection
Code selection is done with eight keys (0 - 7) that provide 4,096 active identification codes. Pushing one
of these keys begins the code selection sequence. The new code is not activated until the fourth digit is
entered. Pressing the CLR key moves the cursor back to the previous digit. Pressing the CLR key when
the cursor is on the first digit of the code, or pressing the CRSR key during code entry, removes the
cursor and cancels data entry, restoring the previous code. You may press the CLR key up to five
seconds after code entry is complete to return the cursor to the fourth digit. The numbers 8 and 9 are not
used for code entry, only for entering a Count Down time, contrast and display brightness, and data
selection in the Configuration mode.
NOTE
The selected identification code should be entered carefully, either one
assigned by air traffic control for IFR flight or an applicable VFR
transponder code.
•
Important Codes:
1200
VFR code for any altitude in the US (Refer to ICAO standards elsewhere)
2000
VFR code commonly used in Europe (Refer to ICAO standards)
7000
VFR code commonly used in Europe (Refer to ICAO standards)
7500
Hijack code (Aircraft is subject to unlawful interference)
7600
Loss of communications
7700
Emergency
