Garmin 010-00230-10 Installation Manual - Page 29

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Any time the function switch is in the ON or ALT position the transponder becomes an

active part of the Air Traffic Control Radar Beacon System (ATCRBS).

transponder also responds to interrogations from TCAS equipped aircraft.

• IDENT  Pressing the IDENT key activates the Special Position Identification (SPI) Pulse for 18 seconds,

identifying the transponder return from others on an air traffic controller's screen. During the

IDENT period the word 'IDENT' appears in the upper left corner of the display.

• VFR  Sets the transponder code to the pre-programmed VFR code selected in Configuration Mode (Set

to 1200 at the factory). Pressing the VFR key again will restore the previous identification code.

• FUNC  Changes the page shown on the right side of the display. Display data includes Pressure

Altitude, Flight Time, Count Up and Count Down timers. In the Configuration Mode, steps

through the function pages.

• START/ STOP  Starts and stops the Count Up, Count Down and Flight timers. In configuration mode,

• CRSR  Initiates entry of the starting time for the Count Down timer and cancels transponder code entry.

Selects changeable fields in Configuration Mode.

• CLR  Resets the Count Up, Count Down and Flight timers. Cancels the previous keypress during code

selection and Count Down entry. Used in Configuration Mode.

• 8  Reduces Contrast and Display Brightness when the respective fields are displayed and enters the

number eight into the Count Down timer. Used in Configuration Mode.

• 9  Reduces Contrast and Display Brightness when the respective fields are displayed and enters the

number eight into the Count Down timer. Used in Configuration Mode.

5.1.2 Code Selection

Code selection is done with eight keys (0 – 7) providing 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 in the Configuration Mode.

The selected identification code should be entered carefully, either one assigned by air

traffic control for IFR flight or an applicable VFR transponder code.

Page 5-2

Rev. 1

steps through functions in reverse.

NOTE

The

GTX 330 Installation Manual

190-00207-02