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REPLACING BATTERY
When the red indicator on the face of the transmitter
lights dimly, or not at all during activation, the battery
needs replacing.
LINEAR LIMITED WARRANTY
This Linear product is warranted against defects in material and workmanship for twelve (12)
months. The Warranty Expiration Date is labeled on the product. This warranty extends only to
wholesale customers who buy direct from Linear or through Linear’s normal distribution channels.
Linear does not warrant this product to consumers. Consumers should inquire from their selling
dealer as to the nature of the dealer’s warranty, if any. There are no obligations or liabilities on the
part of Linear Corporation for consequential damages arising out of or in connection with use or
performance of this product or other indirect damages with respect to loss of property, revenue,
or profi t, or cost of removal, installation, or reinstallation. All implied warranties, including implied
warranties for merchantability and implied warranties for fi tness, are valid only until Warranty
Expiration Date as labeled on the product. This Linear Corporation Warranty is in lieu of all other
warranties express or implied.
All products returned for warranty service require a Return Product Authorization Number (RPA#).
Contact Linear Technical Services at 1-800-421-1587 for an RPA# and other important details.
IMPORTANT !!!
Linear radio controls provide a reliable communications link and fi ll an important need in portable
wireless signaling. However, there are some limitations which must be observed.
• For U.S. installations only: The radios are required to comply with FCC Rules and Regulations as Part 15
devices. As such, they have limited transmitter power and therefore limited range.
• A receiver cannot respond to more than one transmitted signal at a time and may be blocked by radio
signals that occur on or near their operating frequencies, regardless of code settings.
• Changes or modifi cations to the device may void FCC compliance.
• Infrequently used radio links should be tested regularly to protect against undetected interference or fault.
• A general knowledge of radio and its vagaries should be gained prior to acting as a wholesale distributor
or dealer, and these facts should be communicated to the ultimate users.
• This device complies with FCC Part 15 and Industry Canada Rules and Regulations. Operation is subject
to the following two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operation.
1
2
3
REMOVE CASE
SCREW FROM
BACK OF
TRANSMITTER
FLIP TRANSMITTER OVER
AND LIFT OFF FRONT COVER
INSTALL A FRESH
12-VOLT TYPE 23A
BATTERY, FITTING INTO
BATTERY CLIPS
AS SHOWN
PLUS
SIDE
MINUS
SIDE
4
REPLACE TRANSMITTER
COVER AND SCREW
Copyright © 2000 Linear Corporation 217189 A
GT-31
MINIATURE
DIGITAL
TRANSMITTER
Operation Instructions
DESCRIPTION
Linear’s GT series of digital transmitters are wireless
radio controls designed for use with Genie Pro®
INTELLICODE™, Overhead Door® CodeDodger™, and
Linear® Model AM-RGR access control receivers. The
rolling-code GT radio format provides additional security
by changing the transmitter’s code with each use.
The GT-31 is a three-button miniature transmitter that
sends a unique code for each button. Typically, one
button is used to operate a community access gate,
another button can activate the individual’s garage door,
and a third button can control an additional door or other
device.
The transmitter is powered by a 12-volt Type 23A battery.
A red indicator lights when the transmitter is activated. A
2-part key ring is supplied with the unit.
☞ NOTE: INTELLICODE™, CodeDodger™, Genie Pro®, and Overhead
Door® are registered trademarks of Overhead Door Corporation.
PROGRAM TRANSMITTER INTO RECEIVER
For INTELLICODE™ and CodeDodger™ systems, refer
to the instructions provided with the receiver to set it to a
“learning” mode. Activate the desired transmitter button
to program that button into the receiver.
Linear’s Model AM-RGR receivers detect the signal from
the transmitter and pass its digital code to the AM/II
access controller.
GT-31 transmitters are manufactured and sold “Block
Coded” from the factory. Each block of transmitters is
labeled with the starting and ending block code number,
along with a facility code number. Refer to the AM/II
instructions for details on how to program the block and
facility code numbers into the controller.
(760) 438-7000 • FAX (760) 438-7043
USA & Canada (800) 421-1587 & (800) 392-0123
Toll Free FAX (800) 468-1340
www.linearcorp.com
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