Garmin GTX 330 User manual

Garmin GTX 330 Series
Equipment Supplement
Revision A
15-Dec-2012

Garmin GTX 330 Series Supplement GRT Avionics
Revision A GTX 330-2
Section 1: Introduction
1.1
About the GTX 330 Series….………………………….…………………………………………………………..
3
1.2
Data Port and Hardware Requirements……………………………………………………………………
3
Section 2: Installation & Wiring
2.1
Suggested Connections……………………………………………………………………………………………
4
2.2
Worksheet: My System……………………………………………………………………………………………..
4
Section 3: Setup & Programming
3.1
Display Unit Setup…………………………………………………………………………………………………….
5
3.2
Configuring The GTX 330…………………………………………………………………………………………
6
3.3
Post-Installation Check-Out……………………………………………………………………………………..
6
Section 4: Pilot’s Guide Supplement
4.1
Using the GTX 330……………………………………………………………………………………………………
7
4.2
Traffic Display Icon………………………………………………………………………………………………….. 7
4.3
Horizon I or Sport Traffic Display……………………………………………………………………………. 8
4.4
HXr Traffic Display……………………………………………………………………………………………………
8
Table of Contents

Revision A GTX 330-3
GRT Avionics Garmin GTX 330 Series Supplement
Section 1: Introduction
1.1 About the GTX 330 Series
The Garmin GTX 330 Mode S transponder series provides normal altitude encoding data to ATC
as well as traffic data link capability to the GRT family of EFIS systems. With the use of an ES
(Extended Squitter) version of the GTX 330 series, you have the first step to ADS-B compliance for
the 2020 mandate. This supplement provides suggested methods for connecting the GPS to the
EFIS display unit to allow optimal performance of both units.
Download the current installation manual appropriate for your transponder from the Garmin
website and follow all instructions thoroughly. GRT provides pin assignments here for convenience.
While the chance that pin assignments will change is very slim, Garmin may change them at any
time.
The interface between this unit and the EFIS allows for:
ŸPressure altitude, flight ID, GPS position, groundspeed and ground track to be transmitted to ATC
ground stations
ŸTIS traffic alerts (both units) and ADS-B OUT (GTX 330ES only when paired with suitable GPS)
ŸNote: In this section, wherever the term GTX 330 is used, it applies to either of the following
transponders: GTX 330, GTX 330ES.
1.2 Data Port & Hardware Requirements
NOTE: Serial setup is recommended for simplicity. Advanced users concerned about running out
of serial ports may utilize ARINC 429 instead of serial data. Refer to GTX 330 installation manual
for details. GRT Sport EFIS systems require the external GRT ARINC429 module for ARINC
connections. Horizon HX and HXr systems have built-in ARINC 429 ports (Connector C).
Required Display Unit Data Port Suggested Assignment
Serial Port IN Serial 2 IN
Serial Port OUT Serial 2 OUT

Garmin GTX 330 Series Supplement GRT Avionics
Revision A GTX 330-4
Section 2: Installation & Wiring
2.1 Suggested Connections
For more information on Display Unit pins and connectors, see Connector Definitions (HX, SX) on
the GRT website or Pinout Diagrams in HXr Installation Manual.
2.2 Worksheet: My System
You may use this form to make a record of your own Serial Port IN and OUT choices.
Horizon HX and HXr EFIS
Display
Unit Pin
Display Unit
Function GTX 330 Pin GTX 330 Function
B22 Serial 7 OUT P3301-22 (Serial 1 IN)** Fuel air data in for encoder and
flight information
B23 Serial 7 IN P3301-23 (Serial 1 OUT)** Output of TIS traffic data
** Any GTX 330 serial port pair may be used.
** Multiple Serial ports can be used to connect multiple display units for redundancy
Display
Unit Pin Display Unit Port GTX 330 Pin GTX 330 Port Wire Color
Serial _____ OUT P3301- _______ Serial _____ IN
Serial _____ IN P3301- _______ Serial _____ OUT
Sport EFIS
Display
Unit Pin
Sport Display
Unit Function GTX 330 Pin GTX 330 Function
Sport Pin 31
Serial 2 OUT P3301-22 (Serial 1 IN)**
Fuel air data in for encoder and flight
information
Sport Pin 35
Serial 2 IN P3301-23 (serial 1 OUT)** Output of TIS traffic data
** Any GTX 330 serial port pair may be used.
** Multiple Serial ports can be used to connect multiple display units for redundancy

Revision A GTX 330-5
GRT Avionics Garmin GTX 330 Series Supplement
Section 3: Setup & Programming
3.1 Display Unit Setup
After the display unit and the GTX 330 unit are installed and wired, use the following table to
program the display unit to communicate with the GTX 330.
Access the specified Set Menu page in the display unit. Then, look down the list to find each Setting.
Press the right knob to activate the setting, and turn the knob to set each corresponding Value.
This Setup information applies to all GRT EFIS Systems.
Set Menu Page Setting Value
General Setup Serial Port _____ Rate* 9600
General Setup Serial Port _____ Input* GTX 330
General Setup Serial Port _____ Output* Fuel/Air Data(Z format)
General Setup Traffic Altitude Filter Unlimited *
Moving Map Traffic Alert Window On
* Fill in blank with display unit serial port you designated for the GTX 330.

Garmin GTX 330 Series Supplement GRT Avionics
Revision A GTX 330-6
3.2 Configuring the GTX 330
Refer to the most current Garmin GTX 330 installation manual for instructions for accessing the
transponder Configuration page and setting up other important transponder characteristics. This
configuration information only applies to the settings that affect the transponder’s communication
with the EFIS system; there may be other settings required to make the transponder function
properly.
3.3 Post-Installation Checkout for the GTX 330
1. Check that the GTX 330 has a pressure altitude showing on the display.
2. With the GTX 330 turned on go to the Set Menu, General Setup. Check the designated
serial ports counter is active and counting.
RS-232 INPUT/OUTPUT page INPUT OUTPUT
CHNL 1* FADC W/ALT TIS w/REMOTE
* GTX 330 serial port pair wired to Display Unit
Multiple serial ports may be used to connect multiple displays for redundancy.

Garmin GTX 330 Series Supplement GRT Avionics
Revision A GTX 330-7
Section 4: Pilot’s Guide
4.1 Using the GTX 330
Standard operating procedures apply to GTX 330 transponders when used with GRT EFIS systems.
Please refer to the Garmin GTX 330 user manual for transponder operating instructions.
4.2 Traffic Display Icon
When the display unit is programmed to the specifications in Section 3, traffic alerts will pop up
on the map and/or primary flight display automatically when within range of radar-based TIS
(Traffic Information Service) or ADS-B when equipped with an ADS-B receiver.
ADS-B and TIS traffic alerts use the same symbols. Note that if target aircraft do not have Mode C
capability, altitude information is omitted from the icon.
In the example given here, your aircraft is the large icon in the
center of the circle. The target traffic is at your 1 o’clock position,
700 feet above you, climbing at least 500 fpm, and heading nearly
the same direction.
+07
Lateral Vector
Ground track of
target (direction is
away from Target
Vertical Vector
Up Arrow=Climbing
Down Arrow=Descending
No Arrow=Change in
altitude of <500 fpm
Target Icon
Last known position of
target. Appears as a
solid circle on PFD.
Altitude
Relative altitude of target
in hundreds of feet.
+ = Above you
- = Below you

Garmin GTX 330 Series Supplement GRT Avionics
Revision A GTX 330-8
4.3 Horizon I or Sport Traffic Display
When enabled in the Setup Menu (see Section 3) and in range of services, traffic is displayed on
the Moving Map page. When targets are detected within 2 nm of your position, a dedicated Traffic
Alert window will appear automatically on the Map or PFD display. The word TRAFFIC appears in
the lower right corner of the screen in green or yellow, as described below, to indicate service.
4.4 HXr Traffic Display
To Activate Traffic Inset:
1. Press INSET softkey on either the lower Left or Right side of screen.
2. Press TRAFFIC softkey.
3. Press either 2, 6, or 12 softkey (lower left side) to select Inset map range. Range value is the
diameter of inset ring.
4. If no Traffic inset is active, but the EFIS is receiving traffic information, a Traffic inset popup
window will automatically appear if a target appears within 2 nm of your position.
Traffic Service Indicator
Green=Receiving Information
Yellow=No Service/Searching
Traffic Inset
ŸL or R corner of screen
Ÿ2, 6 or 12 nm Range
ŸHDG Up
NOTE: RNG softkeys
control full-screen
map range, not Inset.