Linear SNT00376, SNT00377, SNT00378 User Manual

DXT-21

RED INDICATOR
LIGHTS WHEN
TRANSMITTING

USE TOP BUTTON AS "SHIFT"
KEY, PRESS TO SELECT CODES
5, 6, 7 & 8 WITH FRONT BUTTONS

PRESS FOR
CODE 3 (& TOP
FOR CODE 7)

PRESS FOR
CODE 1 (& TOP
FOR CODE 5)

PRESS FOR
CODE 4 (& TOP
FOR CODE 8)

PRESS FOR
CODE 2 (& TOP
FOR CODE 6)

PRESS BUTTONS FOR A
MINIMUM OF 2 SECONDS

DXT-23
DXT-25

PORTABLE
TRANSMITTERS

Operation Instructions

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USA & Canada [phone] & [phone]

Toll Free FAX [phone]

DXT-21 FEATURES DXT-23 FEATURES DXT-25 FEATURES

The DXT-21, DXT-23 and DXT-25 are battery powered portable
transmitters designed for use with Linear’s DX Format receivers.
Each transmitter can be used in a limitless number of wireless

BY

remote control applications. Pressing a button on the transmitter
sends a digitally coded wireless signal to its companion receiver.

The digital DX code format features over a million possible codes.
The DX transmitters are precoded at the factory to unique codes, so
no field coding is required. The multi-button transmitters send variations
of their preset codes depending on which buttons are pressed.
Transmitters can send a signal for up to 10 seconds per activation.

For versatility, any transmitter code can be programmed into any
receiver channel. Receivers must be programmed to the
transmitter code before system testing and operation. Refer to the
receiver’s instructions for details on programming.

Each transmitter is powered from two 3-Volt #2032 lithium
batteries with an expected battery life of up to 5 years. The red

DXT-21

The DXT-21 is a two-button, one-code transmitter. Pressing either
the round button on the transmitter’s front, or the small button on
the transmitter’s top will send the same signal.

DXT-23

The DXT-23 is a three-button, four-code transmitter. Pressing
either of the transmitter’s front buttons sends codes one and two.
Pressing the small button on the transmitter’s top sends code
three. Pressing both front buttons together sends code four.

DXT-25

The DXT-25 is a five-button, eight-code transmitter. Pressing any
of the transmitter’s front buttons sends codes one through four.
Holding down the small button on the transmitter’s top together
with pushing with any of the front buttons sends codes five through
eight.

PRODUCT DESCRIPTION

TRANSMITTER CONFIGURATIONS

test/operate indicator lights during operation and can be viewed
from the front or the top of the unit. The indicator will glow dimly
during operation when the batteries get low. It will stop lighting
altogether during operation when the batteries are below 4.5 volts.

A removable pocket clip and belt clip are provided for each
transmitter. Either can be attached to the back of the transmitter
allowing the unit to be clipped to shirt pocket or slid onto a belt.

The top button on each transmitter can be hidden with the top
button cover supplied with each unit.

DXT-21 DXT-23 DXT-25

RED INDICATOR
LIGHTS WHEN
TRANSMITTING

REMOVE BATTERY
ACCESS SCREW

REPLACE
WITH TWO
TYPE 2032
BATTERIES

PRESS EITHER BUTTON
TO SEND CODE 1

PRESS BUTTONS FOR A
MINIMUM OF 2 SECONDS

BATTERY REPLACEMENT POCKET & BELT CLIP, BUTTON COVER LINEAR LIMITED WARRANTY

FLIP
TRANSMITTER
OVER

SWING BATTERY
COMPARTMENT OPEN

SIDE UP

PRESS LEFT BUTTON FOR CODE 1
PRESS RIGHT BUTTON FOR CODE 2

RED INDICATOR
LIGHTS WHEN
TRANSMITTING

PRESS BUTTONS FOR A
MINIMUM OF 2 SECONDS

ATTACH WITH
THREE SCREWS

BELT
CLIP

REMOVE FOUR
SCREWS TO
OPEN CASE

INSTALLING TOP BUTTON COVER PLATE

POCKET
CLIP

PRESS TOP BUTTON
FOR CODE 3

PRESS BOTH
FRONT
BUTTONS FOR
CODE 4
(FOR ADDED
SECURITY)

ATTACH WITH
TWO SCREWS

REMOVE
TOP BUTTON

REPLACE WITH
COVER PLATE

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 L inear

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 profit, or cost of removal, installation, or reinstallation. All

implied warr anties, inclu ding implied warranties for merchantability and implied
warranties for fitness, 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.

For warranty service on Linear equipment return product, at sender’s expense to:

Linear Corporation Repairs Department
2580 Pioneer Avenue, Suite C
Vista, CA 92083

Linear radio controls provide a reliable communications link and fill an important need
in portable wireless signalling. 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 modifications 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.

Copyright © 1995 Linear Corporation 211527 A

IMPORTANT !!!