Garmin GTX 33 User Manual

GTX 33 Installation Manual 190-00906-00
Page 1-2 Rev. F
Provision is made for unit software upgrade by means of RS-232 data through rear connector pins. In
installations where the transponder interfaces with a GNS 480 (CNX80) or GTN 6XX/7XX 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.
The GTX 33 meets Mode S Enhanced Surveillance (EHS) requirements. Mode S Enhanced Surveillance is
used predominantly in European airspace. It provides information consisting of additional aircraft
parameters (see JAA NPA 20-12a) to ground radar systems. Compliance with Enhanced Surveillance may
require additional interface between aircraft systems and the GTX 33.
The GTX 33 and GTX 33D differ from the GTX 33H and GTX 33DH in the qualified DO-160 vibration
categories. See the GTX 33 Environmental Qualification Form (005-00131-03) for details.
1.3 ADS-B Capabilities
The Extended Squitter Enabled GTX 33 provides the capabilities of Automatic Dependent Surveillance-
Broadcast (ADS-B) technology, which 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 400/500 Series WAAS unit with main 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 show in the table below,
the Garmin GTX 33 w/ES currently supports ADS-B Out 1090MHz Extended Squitter capability meeting
‘Version 1’ ADS-B system requirements.
NOTE
GTX 33 w/ES transponders with software version 6.20 or earlier are not compliant with
ADS-B version required by the 14 CFR 91.225(a) equipage mandate.
* Version required by 2020 ADS-B mandate defined in 14 CFR 91.225
Table 1-1. ADS-B Versions
ADS-B
Version
GTX 33 w/ES
Compliant
Regulatory Standard/Minimum Performance
Specification
Version 0 No Equipment designed to TSO-166 / RTCA DO-260
Version 1 Yes Equipment designed to TSO-166a / RTCA DO-260A
Version 2* No Equipment designed to TSO-166b / RTCA DO-260B

Garmin GTX 33 Specifications

General

Brand	Garmin
Model	GTX 33
Category	Marine Radio
Language	English