Linear DT-2A User Manual

256 AVAILABLE CODES ON EACH
SWITCH

You can select any one of 256 codes on
Switch “A” and also any one of 256 codes on
switch “B”

NOTE:

The manufacturer strongly recommends that
you test your equipment frequently. From the
time of installation, it is absolutely necessary
to test the system at least once a week. It is
also good practice to change the 9-volt battery
every six months.

NOTE:

The transmitter transmits continuously with
button depression. An LED lights during
transmission to indicate battery operation.

Left Button "A"

Right Button "B"

Battery

Test Light

This product is warranted to the consumer against defects in
material and workmanship for one year from the date of purchase.
This warranty applies to first retail buyers of new devices. Warrantor
will repair, or at its option, replace, any device it finds that requires
service under this warranty, and will return the repaired or replaced
device to the consumer at the warrantor’s cost. For warranty service
and shipping instructions contact warrantor at the address shown
below. Devices must be sent to warrantor for service at owner’s
expense. The remedies provided by this warranty are exclusive.
Implied warranties under state law are to the one year period of this
written warranty. Some states do not allow limitations on how long
an implied warranty lasts, so the above limitation may not apply to
you. In order to be protected by this warranty, save your proof of
purchase and send copy with equipment should repair be required.
This warranty gives you specific legal rights, and you may also have
other rights which vary from state to state.

All products returned for warranty service require a Return
Product Authorization Number (RPM). Contact Linear Technical
Services at 1-800-421-1587 for an RPA# and other important
details.

LIMITED WARRANTY

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 modifications to the device may void FCC compli-

*

ance.
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.

Delta-3 Series

DT-2A

Two-button Digital
Transmitter

Code Setting Instructions

Copyright © 1999 Linear Corporation 207403 G

[phone] • www.linearcorp.com

DT-2A TWO-BUTTON TRANSMITTER
CODE SETTING

There are two digital coding switches in the
DT-2A transmitter. Code Switch “A” is
exposed by removing the battery access
cover. It is the coding switch for the

left button

on the front of the transmitter (Button “A”).
Code Switch “B” is the coding switch for the

right button

on the front of the transmitter
(Button “B”). The switch is located behind the
back cover of the transmitter. To access
Coding Switch “B”, it is necessary to remove
the screw located in the middle of the back
cover.

ROTATE CLIP
AWAY FROM
BATTERY DOOR

BATTERY

CODING SWITCH "A"

SETTING CODE SWITCH “A”

Before removing the battery access door,
loosen battery clip screw and rotate clip away
from door. To open the battery access cover
and gain access to Coding Switch “A”, lift off
the small L-shaped cover by inserting your
thumbnail or a small screwdriver under either
of the two slots at the edge of the case. The
coding switch has eight keys numbered 1-8.

To set a code, select any combination of ON
or OFF positions for the switch keys
numbered 1-8. Use a paper clip or other
pointed object (except a pencil or pen) to set
the keys on the coding switch. The ON
position is when the top of the switch is down.

Keys 1, 2, 3, 4,
and 6 OFF

O

3

1

N

O

F

F

8

7

6

5

4

Keys 5, 7
and 8 ON

SETTING CODE SWITCH “B”

To gain access to Coding Switch “B”, first
remove the screw in the middle of the back
cover. Remove the back cover to expose the
8-key switch.

To set a code, select any combination of ON
and OFF positions for the switch keys, in the
same manner as described for Coding Switch
“A”.

CAUTION:

It is not advisable to set a code with all keys
ON, OFF, or alternating ON and OFF,
because these codes are too easy to
duplicate.

TRANSMITTERS CODE MUST
MATCH RECEIVER CODE

Switch “A” is designed for use with a garage
door opener. The code set to Switch “A” must
be identical to the code set in the receiver to
be used in conjunction with Push-button “A”

CODING
SWITCH

"B"

CODING
SWITCH

"A"

REAR VIEW WITH
BACK COVER REMOVED
TO ACCESS SWITCH "B"

Switch “B”, under the back cover is designed
for use with less-frequently changed codes,
such as a community gate operated by
Push-button “B”. The code set into Switch “B”
must be identical to the code set in the
receiver to be used in conjunction with
Push-button “B”.