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1.7.3 Power Requirements
Characteristic
Input Voltage
Power Input
Maximum Full TSO Reply Rate;
Mode C, 1200 PRF, Code 7777
Maximum Quiescent
1.8 License Requirements
The Telecommunications Act of 1996, effective February 8, 1996, provides the FCC discretion to
eliminate radio station license requirements for aircraft and ships. The GTX 23 installation must comply
with current transmitter licensing requirements. To find out the specific details on whether a particular
installation is exempt from licensing, please visit the FCC web site
If an aircraft license is required, make application for a license on FCC form 404, Application for Aircraft
Radio Station License. The FCC also has a fax-on-demand service to provide forms by fax. The GTX 23
owner accepts all responsibility for obtaining the proper licensing before using the GTX 23.
The UHF transmitter in this equipment is guaranteed to meet federal
communications commission acceptance over the operating temperature range.
Modifications not expressly approved by Garmin could invalidate the license and
make it unlawful to operate the equipment.
1.9 Certification
The conditions and tests required for TSO approval of this article are minimum performance standards. It
is the responsibility of those installing this article either on or within a specific type or class of aircraft to
determine that the aircraft installation conditions are within the TSO standards. The article may be
installed only if performed under 14 CFR Part 43 or the applicable airworthiness requirements.
GTX 23 Installation Manual
190-00906-01
14/28 Vdc See the Environmental Qualification Form for details on
surge ratings and minimum/maximum operating voltages.
22 Watts Typical, 45 Watts Maximum
1.6 A @ 28 Vdc, 3.1 A @14 Vdc
0.85 A @ 28 Vdc, 1.1A @ 14 Vdc
CAUTION
Specification
http://wireless.fcc.gov/aviation.
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Revision A
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