190-00906-01
GTX 23 Installation Manual
Rev. C
Page 1-2
1.3 ADS-B Capabilities
The GTX 23 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 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 23 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
(Table 1-1).
Table 1-1 ADS-B Versions
ADS-B
Version
GTX 23
w/ES
Compliant
Supported
SW Version
Regulatory Standard/Minimum Performance
Specification
Version 1
(applies to
006-B1417-00
Rev. A (v6.20))
Yes
6.00 - 6.20
Equipment designed to TSO-166a / RTCA DO-260A
Version 2*
(applies to All
006-B1417-00
Rev. ( ) except
006-B1417-00
Rev. A (v6.20)
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
