DT-4B
DIGITAL
TRANSMITTER
Code Setting
Instructions
(800) 421-1587 • www.linearcorp.com
DESCRIPTION
The Delta-3 DT-4B digital transmitter is a
four-channel wireless radio control designed for use with
automatic garage/gate operators and access control systems. The
transmitter can be used with one four-channel receiver (DR4), two
two-channel receivers (DR2) or four single-channel receivers (DR,DRQ
or DRM). Receivers should be mounted at least 8 feet apart.
The Delta-3 radio format provides 256 different digital codes. The
codes are set using the 8-position coding switch es in the units.
CAUTION: All transmitters and receivers should be
✶
recoded by the installer prior to operation.
In order to avoid the possibility of duplicat ing codes in adjacent
systems, factory set codes should not be used. In addition, among
the valid codes available, four others should not be used. These
include: all keys set ON or OFF and keys set alternating ON/OFF.
The transmitter is powered by a 9-volt battery. It sho uld last 12 to
18 months with normal use. The red LED on the face of the
transmitter will glow when the unit is activated. When it lights dimly,
or not at all when transmitting, the batt ery needs t o be re placed.
STEP 1
Locate coding switch.
Remove the battery access door
located on the back of the transmitter case . Identify the coding
switch and note that it has eight positions, with ON and OFF clearly
labeled.
REMOVE BATTERY
ACCESS DOOR
CODING
SWITCH
STEP 2A
Coding for single-channel receivers.
Pick any
combination of OFF/ON codes and set them on switch keys 3-8 in
the transmitter. Match the sa me code on switch keys 3- 8 in each
receiver. Set each re ceiver’s switch keys 1 and 2 to select which
transmitter button will activate it. Transmitter switch keys 1 & 2
are unused and can be in any position.
DT-4B CODING SWITCH
SET KEYS
3-8 TO ANY
KEYS 1 & 2
ARE UNUSED
STEP 3
CODE
Test the equipment.
MATCH
3-8
RECEIVER
#1
TRIGGERS FROM BUTTON 1 TRIGGERS FROM BUTTON 2
MATCH
3-8
RECEIVER
#3
TRIGGERS FROM BUTTON 3 TRIGGERS FROM BUTTON 4
1 & 2
OFF
1 OFF
2 ON
Connect the receiver(s) to the
RECEIVER
#2
RECEIVER
#4
MATCH
3-8
MATCH
3-8
1 ON
2 OFF
1 & 2
ON
CODING SWITCHES IN DR RECEIVERS
operators as described in the receiver’s installat ion instructions.
Be sure the door/gate area is clear. Activate the transmitter and
verify that the receiver triggers the operator. Check that the correct
button on the DT-4B activates the desired o perato r.
ACTIVATE TRANSMITTER
TO TEST EQUIPMENT
WARNING!
BE SURE DOOR
AREA IS CLEAR
OF OBSTRUCTIONS
STEP 2B
Coding for two-channel receivers.
Pick any
combination of OFF/ON codes and set them on switch keys 3-8 in
the transmitter. Match the same code on switch keys 3-8 in each
receiver. Set each receiver’s switch key 2 to select which
transmitter buttons (1 & 2, or 3 & 4) will activate it. Transmitter
switch keys 1 & 2 and receiver switch key 1 are unused and
can be in any position.
DT-4B CODING SWITCH
SET KEYS
3-8 TO ANY
KEYS 1 & 2
CODE
ARE UNUSED
CODING SWITCHES IN DR2 RECEIVERS
RECEIVER
#1
KEY 1
UNUSED
KEY 2
OFF
RECEIVER
MATCH
3-8
#2
TRIGGERS FROM
BUTTONS 1 & 2
KEY 1
UNUSED
KEY 2
ON
MATCH
3-8
TRIGGERS FROM
BUTTONS 3 & 4
BATTERY REPLACEMENT
The battery should last 12 to 18 months with normal use. The red
LED on the face of the transmitter will glow when the unit is
activated. When the red LED lights dimly, or not at all when
transmitting, the battery needs to be replaced. Remove the battery
access door to change the battery. Any type of 9-volt battery can
be used.
REPLACE BATTERY WITH
FRESH 9-VOLT BATTERY
STEP 2C
Coding for a four-channel receiver.
Pick any
combination of OFF/ON codes and set them on switch keys 3-8 in
the transmitter. Match the same code on switch keys 3-8 in each
receiver. Transmitter and receiver switch keys 1 & 2 are
unused and can be in any position.
DT-4B CODING SWITCH
SET KEYS
KEYS 1 & 2
ARE UNUSED
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 unde r this warranty, and w ill return the repaired or replaced
device to the consumer at the warrantor’s cost. For wa rranty servic e and shipping i nstructions c ontact warranto r
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 t o be pro tected by this warr anty, save you r pr oof of pur chase 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 (RPA#). Contact
Linear Technical Services at 1-800-421-1587 for an RPA# and other import ant details.
Linear radio controls provide a reliable communication s link and fill an important need in portable wireless
signaling. However, there are so me l imitations 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 lim i te d transmitter power and therefore limited range.
A receiver cannot respond to more t han one transmi tted signal at a time and may be blocked by radio s ignals
✶
that occur on or near their operating fr equencies, regardless of code settings.
Changes or modifications to the devi ce may void FCC compliance.
✶
Infrequently used radio lin ks should be tested regularly to protect against undetected interfer ence or fault.
✶
A general knowledge of radio and its vagar i es sho ul d be gai ned pr io r to ac tin g as a whole sa le dis tr ibut or or
✶
dealer, and these facts should be communi cated to the ultimate users.
This device complies with FCC Ru les Part 15. Oper ation is subject to the fo llowing two conditions: (1) This
device may not cause harmful interference and (2) this devic e must accep t any inter ference rec eived, inc luding
interference that may cause undesired operation.
Copyright © 1999 Linear Corporation 106088 D
3-8 TO ANY
CODE
LINEAR LIMITED WARRANTY
CODING SWITCH IN DR4 RECEIVER
KEYS 1 & 2
ARE UNUSED
IMPORTANT !!!
MATCH KEYS
3-8 TO DT-4B