Garmin GTX 330 User Manual

GTX 330/330D Installation Manual 190-00207-02
Page 1-2 Rev. U
and configuration selection. The unit also features an altitude monitor, TIS traffic advisories and flight
timers. A voice or tone audio output announces altitude deviation, TIS traffic advisory and count down
timer expiration.
The GTX 330 features multiple transmit/receive ARINC 429 and RS-232 data ports. The unit concentrates
data from three ARINC 429 inputs, gray code, RS-232 input data and discrete inputs to the high-speed
ARINC 429 output bus used by display systems such as the Garmin 400 Series/500 Series units.
The GTX 330 is configured with all key controls. The layout of the front panel keys and displays
segregates the transponder’s primary functions from the secondary functions. The unit can be configured
so the aircraft avionics master bus can turn the unit on.
Provision is made for unit software upgrade by means of RS-232 data through rear connector pins. The
installation of an optional connector is highly recommended. If the optional connector is placed in the
aircraft, transponder removal and reinstallation for software upgrade is not required. The software can be
changed while the unit is still mounted inside the aircraft.
1.3 ADS-B Capabilities
Automatic Dependent Surveillance-Broadcast (ADS-B) technology improves situational awareness and
flight safety. With ADS-B capabilities, position, velocity, and heading information are automatically
transmitted to other aircraft and ground stations. The current air traffic control system depends on a
transponder request for pertinent aircraft information. ADS-B provides automatic transmission of aircraft
information without a request.
NOTE
RS-232 ADS-B Out from a Garmin 4XX/5XX WAAS, GTN 6XX/7XX with GPS software
version 3.20 or later, or a GPS WAAS source that supports ARINC 743A output is required
to support ADS-B transmissions.
1.3.1 ADS-B Versions
There are three distinct ADS-B versions recognized by regulatory authorities. As shown in the table
below, the Garmin GTX 330 w/ES currently supports ADS-B Out 1090MHz Extended Squitter capability
meeting ‘Version 1’ or ‘Version 2' ADS-B system requirements depending on software version (see Table
1-1).
NOTE
GTX 330 w/ES transponders with software version 6.20 or earlier are not compliant with
the ADS-B version required by the 14 CFR 91.225(a) equipage mandate.
Table 1-1 ADS-B Versions
ADS-B
Version
GTX 330 w/ES
Compliant
Supported
SW Version
Regulatory Standard/Minimum Performance
Specification
Version 0 No None Equipment designed to TSO-166 / RTCA DO-260
Version 1 Yes 6.00 - 6.20 Equipment designed to TSO-166a / RTCA DO-260A
Version 2* Yes
7.01
and later
Equipment designed to TSO-166b / RTCA DO-260B
*Version required by 2020 ADS-B Out mandate defined in 14 CFR 91.225

Garmin GTX 330 Specifications

General

Reply Frequencies	1090 MHz
Frequency Range	1090 MHz (reply)
Power Output	200 Watts peak
Dimensions	5.7 x 1.6 x 7.5 inches (145 x 41 x 191 mm)
Temperature Range	-20°C to +55°C
Operating Voltage	11-33 VDC