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| The Garmin GTX 330 Transponder has twenty buttons. | ||
| Clicking and display areas | ||
| The click areas correspond to the buttons | ||
| IDENT. Ident Pushbutton | ||
| VFR. VFR Button | ||
| ON. Turns on the GTX 330 | ||
| ALT. Alt mode | ||
| STBY. Stand by mode | ||
| OFF. Turns off the GTX 330 | ||
| 0 to 7 . Code Selector Knobs | ||
| FUNC. Function Selector Knob. Selects what you see in the right side of the screen. | ||
| CRSR. Cursor | ||
| START/STOP. Set timers | ||
| CLR. Reset timers or clear code figures | ||
| Operation | ||
| OFF - Powers off the GTX 330. Pressing STBY, ON or ALT key powers on the transponder displaying the last active identification code. | ||
| STBY - Selects the standby mode. | ||
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ON - Selects Mode A. In this
mode, the transponder replies to interrogations, as indicated by the
Reply Symbol  .
Replies do not include altitude information. |
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ALT - Selects
Mode A and Mode C. In ALT mode,
the transponder replies to identification and altitude interrogations
as indicated by the Reply Symbol |
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| CODE SELECTION - Is done with eight keys (0-7) providing 4096 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. The numbers 8 and 9 are not used for code entry only for entering a Count Down time, and contrast and display brightness. | ||
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IDENT - Pressing
the IDENT key
activates the Special Position Identification. The word IDENT will
appear in the upper left corner of the display and Reply Symbol |
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VFR - Sets the transponder code to the pre-programmed VFR code selected in Configuration Mode (this is set to 1200). |
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FUNC - Changes the page shown on the right side of the display. Display data includes Pressure Altitude, Flight Time, Altitude Monitor, Count Up and Count Down timers, contrast and brightnes. |
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START/STOP - Starts and stops the Count Up and Count Down. |
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CRSR - Initiates starting time entry for the Count Down timer |
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CLR - Resets the Count Up and Count Down. Cancels the previous keypress during code selection. |
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8 - Reduces Contrast and Display Brightness when the respective fields are displayed and set the Count Up figures (decreasing) |
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9 - Increases Contrast and Display Brightness when the respective fields are displayed and set the Count Up figures (increasing) |
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| Function Display | ||
| PRESSURE ALT - Displays the altitude data supplied to the GTX 330 in hundreds of feet. | ||
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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. |
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| FLIGHT TIME - Timer start is configured as Automatic the timer begins when take off is sensed. | ||
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| ALTITUDE MONITOR - Controlled by START/STOP key Activates a voice alarm and warning annunciator when altitude limit is exceeded (not implemented, just data displayed). | ||
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| OAT/DALT : Displays Outside Air Temperature and Density Altitude. | ||
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| COUNT UP TIMER : Controlled by START/STOP and CLR keys. | ||
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| COUNT DOWN TIMER : Controlled by START/STOP, CLR, and CRSR keys. The initial Count Down time is entered with the 8 and 9 keys. | ||
| CONTRAST : Contrast is controlled by the 8 and 9 keys. | ||
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| DISPLAY: Backlighting is controlled by the 8 and 9 keys. | ||
| Timer Operation | ||
| To operate the Flight Timer: | ||
| 1. Press the FUNC key until “FLIGHT TIME” is displayed. | ||
| 2. In this version the GTX 330 Is configured with automated Airborne Determination, the timer begins automatically when the unit senses that the aircraft has began to take off (ground speed greater than 30 knots).The timer will stop when ground speed less than 30 knots, and will resets to zero and begins again if a new take off has place. | ||
| To operate the Count Up timer | ||
| 1. Press the FUNC key until “COUNT UP” is displayed. | ||
| 2. If necessary, press CLR to reset the Count Up timer to zero. | ||
| 3. Press START/STOP to begin count up. | ||
| 4. Press START/STOP again to pause the timer. Pressing again will resume from the time paused. | ||
| 5. Press CLR to reset the timer to zero. | ||
| To operate the Count Down timer | ||
| 1. Press the FUNC key until “COUNT DOWN” is displayed. | ||
| 2. Pressing CRSR will move the cursor under hours, minutes or seconds. Usee the 8 and 9 keys to set the initial time. | ||
| 3. Press START/STOP to begin count down. | ||
| 4. Press START/STOP again to pause the timer. | ||
| 5. When the Count Down timer expires, the ‘COUNT DOWN' banner is replaced with a flashing “EXPIRED”. | ||
| 6. Press CLR to reset the timer. | ||
| Automatic ALT-GND Mode Switching | ||
| if the GTX 330 is configured with Automated Airbome Determination, normal operation begins when take off is sensed. When the aircraft is on the ground the screen automatically displays GND The transponder does not respond to ATCRBS interrogations when GND is annunciated. | ||
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.
won't
blink for 18 seconds, identifying your transponder return from others
on the air traffic controller's screen. The word IDENT will appear in
the upper left corner of the display while the IDENT mode is active.