Linear Multi-Code 4120 Installation Instructions Manual

MODEL 4120 TWO CHANNEL TRANSMITTER

Congratulations! You have just purchased a MULTI-CODE Digital Transmitter,
which we believe to be the fi nest product of its kind on the market. With little care
this transmitter should provide you with many years of excellent service. Please
take a moment to read the following instructions and you will fi nd that setting your
now transmitter will be quite an easy matter.

ACCESSING THE CODE SWITCH

Insert a small coin into the slot located at the bottom end of the transmitter. Twist
the coin and remove the access cover to expose the code switches and battery
compartment.

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PRINTER’S INSTRUCTIONS:

INSTR,INSTL,MC4120,2 CH,TX - LINEAR P/N: 214881 B - INK: BLACK - MATERIAL: 20 LB. MEAD BOND - SIZE: 9.000” X 3.500” - SCALE: 1-1 - SIDE 1 OF 2

INSTALLATION INSTRUCTIONS

PLEASE NOTE

Linear LLC has devoted a great deal of time and research in order to provide the
most reliable equipment possible. Certain limitations must be observed.
(1) MULTI-CODE radio components must conform with FCC Part 15 requirements.

For this reason, the range and power of our radios is within specifi ed limits.

(2) As with all manufacturers, Linear LLC radios must accept all signals that they

receive. This may, in rare instances, create diffi culty.

(3) You should test your entire system occasionally in order to be sure that all

components areworking in good order.

(4) Linear LLC dealers can provide you with information regarding the use of our radio

controls, and can provide valuable installation and operation information, when
requested.

CAUTION: Any changes or modifi cations in intentional or unintentional radiators
which are not expressly approved by LINEAR LLC could void the user’s authority
to operate this equipment. This applies to intentional and unintentional radiators
certifi ed per Part 15 of the F.C.C. rules and regulations.

LINEAR LLC

Channel 1 on the receiver is selected by moving the 10th position of the transmitter
side A to the off (open) position. Channel 2 is selected by moving the 10th position
of the transmitter side B to the on (closed) position. Once the codes have been set,
check the operation and replace the lower cover.

TRANSMITTER INSTALLATION

The transmitter is completely self contained, including battery, and can be operated
while mounted in the car. It is supplied with a clip for attaching to the sun visor, if
desired. If the clip is used, attach to the case by sliding it into the recess provided
on the back of the transmitter until the small dimples fi t into the holes in the clip.

WARRANTY

ALL MULTI-CODE door related products carry a eighteen (18) month warranty
against defects in workmanship or material. This warranty begins at the date of
manufacture, for eighteen months. Linear LLC warranties our product only to our
authorized dealers and distributors, and not to the end customer. If you have nay
questions about our warranty, please ask your dealer to determine the nature and
scope of his warranty. Linear LLC does not assume, and is not responsible for,
any real or consequential damages from claims against the performance of our
product, nor is it liable for any costs related to loss of life, property, or revenue.

PRINTER’S INSTRUCTIONS:

INSTR,INSTL,MC4120,2 CH,TX - LINEAR P/N: 214881 B - INK: BLACK - MATERIAL: 20 LB. MEAD BOND - SIZE: 9.000” X 3.500” - SCALE: 1-1 - SIDE 2 OF 2

CODING

Before placing your transmitter into service, we urge you to set your codes, in
order not to inter fere with neighboring systems, and to provide security for your
own system. You will note that the model 4120 transmitter has two, ten position
code switches (see fi gure 1). We strongly urge that several coding schemes be
avoided: ALL ON; ALL OFF; 2, 4, 6, 8, 10, ON; 1, 3, 5, 7, 9, ON. These positions
are similar to our or other manufacturer’s test positions, or are frequently used.

If you have two single channel receivers: Set your transmitter so that the ten
position switch on side A will match your receiver #1. Set the ten position switch
on transmitter side B to your receiver #2 (see fi gure 2).

CODE SWITCH

SIDE A

CODE SWITCH

SIDE B

Figure 2

Figure 1

CODE SWITCH