Garmin GTR 225 User manual

190-01182-02 March 2015 Revision F
GTR 225/GNC 255
TSO Installation Manual

190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page A
© 2012-2015
Garmin International, Inc., or its subsidiaries
All Rights Reserved
Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted,
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of any revision to this manual onto a hard drive or other electronic storage medium to be viewed and to
print one copy of this manual or of any revision hereto, provided that such electronic or printed copy of this
manual or revision must contain the complete text of this copyright notice and provided further that any
unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.
At Garmin, we value your opinion. For comments about this guide, please e-mail:
[email protected].
Garmin International, Inc.
1200 E. 151st Street
Olathe, KS 66062 USA
Telephone: [phone]
Aviation Dealer Technical Support Line (Toll Free): [phone]
Website address: www.garmin.com
Garmin (Europe) Ltd.
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Telephone: [phone]
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Telephone: [phone]
RECORD OF REVISIONS
Revision Revision Date Description
D 12/12/13 Updated serial port configuration and other minor edits. See Current
Revision Description for details.
E 8/25/14 Add NV data and other minor edits. See Current Revision Description
for details.
F 3/25/15 Added v2.10 functionality and other minor edits. See Current Revision
Description for details.

190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page B
CURRENT REVISION DESCRIPTION
Section Number Description of Change
Global Updated screenshots where applicable.
Rewrote many sections for clarity.
1.3 Renamed section to, “General Specifications.” Merged general specifications to
table 1-2.
1.5 Added speaker audio output and maximum audio output reduction to table 1-5.
1.10 Renamed section to, “Certification.”
4.5 Added table 4-6, “Socket Contact P/Ns.”
5.2.4.2.2 Added an NMEA standard GPS messages to section.
5.2.4.2.3 Added COM and NAV keypad command messages to section.
6.4.2.2 Added new section, “Calibrate OBS Resolver Page (GNC Only).
6.4.3.2 Added information and tables about COM RX squelch settings.
6.4.4.1 Added table 6-13, “COM Sidetone Mode Selections” and table 6-14, “COM Sidetone
Pilot Control.”
6.8.2 Added table 6-16, “Software Compatibility.”
B.2.4.1.7 Added new section, “COM Keypad Input (Display Software Version 2.10 or later).
B.2.4.1.13 Added new section, “NAV Keypad Input (Display Software Version 2.10 or later).
Appendix D Added GNS 480 to figure D-15.
Added figure D-16, “GTR/GNC-GMX 200 Interconnect.”

190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page i
INFORMATION SUBJECT TO EXPORT CONTROL LAWS
This document may contain information which is subject to the Export Administration Regulations (EAR)
issued by the United States Department of Commerce (15 CFR, chapter VII, subchapter C) and which may
not be exported, released, or disclosed to foreign nationals inside or outside of the United States without
first obtaining an export license. A violation of the EAR may be subject to a penalty of up to 10 years
imprisonment and a fine of up to $1,000,000 under Section 2410 of the Export Administration Act of 1979.
Include this notice with any reproduced portion of this document.
This information in this document is subject to change without notice. Visit Garmin’s website
(www.garmin.com) for updates and supplemental information concerning the operation of Garmin
products.
DEFINITIONS OF WARNINGS, CAUTIONS, AND NOTES
WARNING
Warnings indicate immediate attention must be given to avoid potential
personal injury or equipment damage should the instructions be disregarded.
CAUTION
Cautions indicate an alert to potential damage to the equipment if the
procedural step is not directly followed.
NOTE
Notes indicate additional information is needed.

190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page ii
WARNING
This product, its packaging, and its components contain chemicals known to the State of
California to cause cancer, birth defects, or reproductive harm. This notice is being
provided in accordance with California's Proposition 65. If you have any questions or
would like additional information, please refer to our website at
www.garmin.com/prop65.
WARNING
Perchlorate Material – special handling may apply.
Refer to www.dtsc.ca.gov/hazardouswaste/perchlorate.
WARNING
This product contains a lithium battery that must be recycled or disposed of properly.
Battery replacement and removal must be performed by professional services.
CAUTION
To avoid damage to the GTR 225 or GNC 255, take precautions to prevent Electrostatic
Discharge (ESD) when handling the GTR, connectors, fan, and associated wiring. ESD
damage can be prevented by touching an object of the same electrical potential as the unit
before handling the unit itself.
NOTE
Garmin recommends installation of the GTR 225/GNC 255 by a Garmin authorized
installer. To the extent allowable by law, Garmin will not be liable for damages resulting
from improper or negligent installation of the GTR 225/GNC 255. For questions, please
contact Garmin Aviation Product Support at [phone].