Listen LA-122 User manual

LA-122
www.listentech.com
USER MANUAL
Universal Antenna Kit
(72 and 216 MHz)

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Dear Valued Customer,
Thank you for choosing Listen! We are dedicated to providing you
with high-quality products, and take pride in delivering outstanding
performance to ensure you are completely satised. We independently
certify each of our products to the highest quality standards and back
them with an industry-leading warranty. We are available to answer any
questions you might have during installation or in the operation of our
products. At Listen, it’s all about you, should you have any comments or
suggestions we’re here to listen.
Here’s how to reach us:
+1.801.233.8992 +1.800.330.0891 North America
+1.801.233.8995 fax [email protected] www.listentech.com
Thank you and enjoy your listening experience!
Best regards,
The Listen Team

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4 Package Contents
5Specications
6Note Before Starting Installation
9Dipole Antenna Mounting Options
13 Monopole Antenna Mounting Options
16 Troubleshooting
16 Warranty
16 Contact Us
TABLE OF CONTENTS

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PACKAGE CONTENTS
Contents
• Wall/Electrical Box Mounting Plate
• Mounting Bracket
• Antenna Module and 25 ft. (7.6 m) RG58
coaxial cable with BNC Connectors
• Telescoping antennas (2 for both 72
and 216 MHz)
• Flexible antennas (2 for both 72 and 216 MHz)
• Ground Base and Shorting Plate
Mounting Hardware
(4) #6-32 Machine Screws - used to mount
to a single or dual gang duplex box
(4) #8-32 Machine Screws - used to mount to a
square or hex junction or light box
(4) #8 Sheet Metal Screws - used to mount to
metal or wood, or for use with dry anchors
(4) Dry Anchors - used to mount to drywall,
concrete, plaster, brick, or masonry
(2) Hex Kep Nuts (#10-32) and one (1) Fiber
Washer - used for mounting exible antennas to
the Antenna Module, and for grounding purposes
Use With
LT-800-072 Stationary Transmitter
LT-800-216 Stationary Transmitter
LT-803-072 Stationary 3-Channel FM
Transmitter (72 MHz)
Listen Part Number
LA-122 Universal Remote Antenna
Mounting Options
• Wall Mount (to your electrical box)
• Direct Wall Mount
• Ceiling Mount
• In-Wall or In-Ceiling Mount
• Mast Mount
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Package Contents
LA-122 Package Contents
Optional Accessories
LA-127 RG58 BNC Cable Connector
LA-128 RG8 BNC Cable Connector
LA-112 RG58 Coaxial Cable
LA-113 RG8 Low Loss Coaxial Cable
LA-390 RG8/50 Ohm Low Loss
Preassembled Cable
LA-391 RG58/50 Ohm Preassembled
Cable
Listen Part Number
LA-122 Universal Remote Antenna
LA-122 Contents
• Wall/Electrical Box Mounting Plate
• Mounting Bracket
• Antenna Module and 25 ft. (7.6 m) RG58 coaxial cable
with BNC Connectors
• Telescoping antennas (2 for both 72 and 216 MHz)
• Flexible antennas (2 for both 72 and 216 MHz)
• Ground Plane and Shorting Plate
• Mounting Hardware:
(4) #6-32 Machine Screws - used to mount to a single or
dual gang duplex box
(4) #8-32 Machine Screws - used to mount to a square or
hex junction or light box
(4) #8 Sheet Metal Screws - used to mount to metal or
wood, or for use with dry anchors
(4) Dry Anchors - used to mount to drywall, concrete, plas-
ter, brick, or masonry
(2) Hex Kep Nuts (#10-32) and one (1) Fiber Washer - used
for mounting exible antennas to the Antenna Module,
and for grounding purposes
Mounting Options
•Wall Mount (to your electrical box)
Direct Wall Mount
•Ceiling Mount
In-Wall or In-Ceiling Mount
Mast Mount
Use With:
LT-800-072 Stationary Transmitter
LT-800-216 Stationary Transmitter
LT-803-072 Stationary 3-Channel FM Transmitter (72 MHz)
LR-100-072 Stationary Receiver/Power Amplier
LR-100-216 Stationary Receiver/Power Amplier
LR-600-072 Wireless FM Receiver/Speaker (72MHz)
LR-600-216 Wireless FM Receiver/Speaker (216MHz)
Mounting Bracket
Grounding Base
Antenna Module
Telescoping Antennas 72 MHz
Wall/Electrical Box
Mounting Plate
Shorting Plate
Telescoping Antennas 216 MHz
Flexible Antennas 216 MHz
Flexible Antennas 72 MHz
Machine Screw Dry Anchors Tapping Screws Hex Kep Nut Fiber Washer

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SPECIFICATIONS
Architectural Specications
The Universal Antenna Kit shall be capable of operating from 72.0 to 76.0 MHz with a center frequency
of 73.5 MHz and from 216.0 to 217.0 MHz with a center frequency of 216.5 MHz. The kit includes the
necessary hardware to mount the antenna on a single or dual electrical box, directly on a wall, on a ceiling
electrical box or on a at surface. The antenna shall have a BNC connector and the kit shall come with
7.6 m (25 ft.) of RG58 coax with BNC connectors. The kit shall include rigid and exible antenna radials.
The Listen LA-122 Universal Antenna Kit is specied.
SPECIFICATION LA-122
Center Frequencies 73.50 MHz and 216.50 MHz
Antenna Types Monopole and Dipole
Antenna Segment Lengths (same for both rigid and exible antennas) 72 MHz:
1.0 m (39.25 in.); 216 MHz: 31.1 cm (12.25 in.)
Antenna Gain 72 MHz: 2.03 m (79.75 in.); 216 MHz: 65.4 cm (25.75 in.)
Dipole Vertical Clearance Unity
Connector Standard BNC
Coax Provided 7.6 m (25 ft.) RG58 with BNC connectors
Mounting Options Wall mount, dual and single electrical box, ceiling electrical box,
horizontal surface mount (such as on top of a rack), ceiling/
inverse mounting, exible mounting in-wall or in-ceiling and
mast or conduit mount
Mounting Hardware Provided. Includes self-tapping sheet metal screws, drywall
anchors, and all hardware required to mount to electrical
boxes. Does not include hardware required to mount to a mast
(available at most hardware stores)
Mounting Bracket Dimensions 11 cm (4.5 in.) wide x 18 cm (7.0 in.) deep x 6.4 cm (2.5 in.) high
Mounting Plate Dimensions 11.4 cm (4.48 in.) x 11.6 cm (4.55 in.)
Shipping Box Dimensions 70 mm (2.76 in.) x 415 mm (16.3 in.) x 435 mm (17.1 in.)
Weight 2 kg (4.4 lbs.)
Specications are subject to change without notication
Specication

6
IMPORTANT TO NOTE BEFORE STARTING INSTALLATION
Coaxial Cable
If you plan to use your own coaxial cable instead of the provided cable, you must use cable and
connectors rated at 50 ohms. Although cable used for cable TV installations looks similar to this cable,
it won’t work with your Listen system.
If you need to run cable over a greater length than 15.24 m (50 ft.) for 216 MHz applications or greater
than 30.48 m (100 ft.) for 72 MHz applications, we recommend that you use RG-8 cable rather than RG-58.
It is a lower loss cable, meaning that more of your signal will reach the antenna.
Long cable runs can result in signal degradation due to “loss” characteristics of the cable. At 72 MHz,
there is a loss of 2 dB per 30.48 m (100 ft.) of cable and at 216 MHz, there is a loss of 5 dB per 30.48 m
(100 ft.) of cable. (A 3dB loss means half of your power has been lost.) However, it is better to suer
coaxial power loss than to try to shoot your signal through obstacles! Obstacles, especially metal, can
create drop-outs or reections of your signal that will result in poor listening conditions.
Before Starting Assembly of Your Antenna
Please carefully compare the contents of your kit with the list found on page 2. If any items are missing
or damaged, please contact Listen Technologies. If items were damaged in shipment, contact your
carrier immediately and retain all packaging for inspection by your carrier. Listen is not responsible for
shipping damage.
Antenna Orientation
The antenna’s pattern is hemispherical, meaning that it has an “active” side and a ground side. The active
side directs the signal toward the receivers, so it is essential that the active side be oriented toward
the area where the receivers will be used. The Antenna Module’s ground side has the word “GROUND”
molded into the plastic.
See Diagram A. If it is necessary to locate an antenna low on a wall, the ground side should face down. If
you are mounting a monopole antenna in a ceiling or high on a wall, the ground side should face up. It
may be necessary to move the ground side of the antenna mount around in order to accomplish this.
To move the ground side of the module, simply remove the four nuts, reverse the module so that the
ground side is facing the bracket, then re-attach the nuts. Be careful to not detach any wires if the module
opens while it is not secured to the bracket.

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6
Setup Instructions
Important Things to Note Before Starting
Antenna Orientation
The antenna’s pattern is hemispherical, meaning that it has an “active” side and a ground side. The
active side directs the signal toward the receivers, so it is essential that the active side be oriented
toward the area where the receivers will be used. The Antenna Module’s ground side has the word
“GROUND” molded into the plastic.
See Diagram A. If it is necessary to locate an antenna low on a wall, the ground side should face
down. If you are mounting a monopole antenna in a ceiling or high on a wall, the ground side
should face UP. It may be necessary to move the ground side of the antenna mount around in
order to accomplish this.
To move the ground side of the module, simply remove the four nuts, reverse the module so that the
ground side is facing the bracket, then re-attach the nuts. Be careful to not detach any wires if the
module opens while it is not secured to the bracket.
Ground side of antenna
Ground side of antenna
This is the area of coverage
This is the area of coverage
Scenario 2 - Antenna is
mounted high in the facility
Scenario 1 - Antenna is
mounted low in the facility
Diagram A. Antenna coverage patterns. In Scenario 1, the antenna is mounted low in the facility. The
GROUND side of the antenna (marked on the module) should face down. In Scenario 2, the antenna is
mounted high in the facility. The GROUND side of the antenna should face up.
Scenario 2 - Antenna is mounted high
in the facility (greater than 25 ft.)
Diagram A. Antenna coverage patterns. In Scenario 1, the antenna is mounted low in the facility. The
GROUND side of the antenna (marked on the module) should face down. In Scenario 2, the antenna is
mounted high in the facility. The GROUND side of the antenna should face up.
Scenario 1 - Antenna is
mounted low in the facility

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IMPORTANT TO NOTE BEFORE STARTING INSTALLATION (CONTINUED)
Selecting an Antenna Location
The location and conguration of your antenna mount will determine the quality of your signal; therefore,
there are some important factors to consider.
• Where will the receivers be located? Ideally, the antenna will be centrally positioned above that area.
• Where will the transmitter or stationary receiver/power amplier be located? We recommend that it be
located no more than 7.6 meters (25 ft.) from the antenna.
• Are there any metal obstructions in the area? Ideally, there will be no metal between the antenna and
the receivers. Also, try to avoid mounting the antenna in a location where nearby metal would be in
parallel with the antenna — this degrades the signal.
• Will the antenna be mounted outdoors? Antennas work well outdoors, but if possible, try to place the
antenna where it will not receive too much exposure to moisture or dirt. Covering exposed connections
with petroleum jelly or silicone gel will extend the life of the antenna.
Choosing the Type of Antenna to Use
Several types of antennas are included in this kit. You will only use one of them. How do you select the
best antenna?
First, what is your operating frequency — 72 MHz or 216 MHz? This eliminates half of the antennas since
you can only use an antenna that will work for your frequency range.
Note: Remember, the LONGER antennas work on the lower frequency of 72 MHz and the SHORTER
antennas work at 216 MHz.
Next, do you have any space restrictions? The rigid dipole antenna (the one with the two extendable
arms) provides the best signal, but only if you can fully extend the sections of the antenna. If you can’t
fully extend the rigid dipole, you will need to go with either the exible dipole or the monopole antenna.
We recommend using a dipole antenna whenever possible.
If you need to mount your antenna on top of an equipment rack, you will need to use the
monopole antenna.
For mounting in a ceiling or wall, or taking up the least amount of space along an outside edge of a wall,
the exible dipole antenna is a good choice. Remember, though, that you need to extend the sections of
this exible antenna as far apart from each other as possible.

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DIPOLE ANTENNA MOUNTING OPTIONS
Mount to an Electrical Box in a Wall
See Diagram B at right
The antenna may be mounted to a single or dual gang duplex box,
or to a square or hexagonal junction box.
Attach the kit’s Mounting Plate to the electrical box (see photo,
right). The cover plate has a number of holes and slots to
accomodate a wide variety of electrical boxes. Next, secure the
Mounting Bracket to the plate and connect your antenna as noted
in the following pages.
Mount Directly to a Wall
See Diagram C at right
We recommend using the Mounting Plate to make for a sturdier
installation, however, it is not necessary to do so. If you use the
Mounting Plate, you will need to provide two shallow clearance
gaps in the wall to allow for the two protrusions in the
Mounting Plate.
Use appropriate anchors to secure the Mounting Plate to the
wall (hollow wall anchors are provided in this kit), then secure the
Mounting Bracket to the plate. If you are not using the Mounting
Plate, use appropriate wall anchors to mount the Mounting Bracket
directly to the wall.
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Setup Instructions
Dipole Antenna Mounting Options
Mount to an Electrical Box in a Wall
Mount Directly to a Wall
See Diagram B at right
The antenna may be mounted to a single
or dual gang duplex box, or to a square or
hexagonal junction box.
Attach the kit’s Mounting Plate to the
electrical box (see photo, right). The cover
plate has a number of holes and slots to
accomodate a wide variety of electrical
boxes. Next, secure the Mounting Bracket
to the plate and connect your antenna as
noted in the following pages.
See Diagram C at right
We recommend using the Mounting Plate
to make for a sturdier installation, however,
it is not necessary to do so. If you use the
Mounting Plate, you will need to provide
two shallow clearance gaps in the wall to
allow for the two protrusions in the Mounting
Plate.
Use appropriate anchors to secure the
Mounting Plate to the wall (hollow wall
anchors are provided in this kit), then secure
the Mounting Bracket to the plate. If you are
not using the Mounting Plate, use
appropriate wall anchors to mount the
Mounting Bracket directly to the wall.
Dipole mounted
on electrical box
Monopole mounted
directly to wall
Flexible dipole
Remote Base
Ground Plane
Diagram B. The Electrical Box Mount
uses the Mounting Plate and Mounting
Bracket as shown above.
Diagram C. A direct Wall Mount should use the
Mounting Plate for added strength, but it is not
required for proper antenna operation.
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Setup Instructions
Dipole Antenna Mounting Options
Mount to an Electrical Box in a Wall
Mount Directly to a Wall
See Diagram B at right
The antenna may be mounted to a single
or dual gang duplex box, or to a square or
hexagonal junction box.
Attach the kit’s Mounting Plate to the
electrical box (see photo, right). The cover
plate has a number of holes and slots to
accomodate a wide variety of electrical
boxes. Next, secure the Mounting Bracket
to the plate and connect your antenna as
noted in the following pages.
See Diagram C at right
We recommend using the Mounting Plate
to make for a sturdier installation, however,
it is not necessary to do so. If you use the
Mounting Plate, you will need to provide
two shallow clearance gaps in the wall to
allow for the two protrusions in the Mounting
Plate.
Use appropriate anchors to secure the
Mounting Plate to the wall (hollow wall
anchors are provided in this kit), then secure
the Mounting Bracket to the plate. If you are
not using the Mounting Plate, use
appropriate wall anchors to mount the
Mounting Bracket directly to the wall.
Dipole mounted
on electrical box
Monopole mounted
directly to wall
Flexible dipole
Remote Base
Ground Plane
Diagram B. The Electrical Box Mount
uses the Mounting Plate and Mounting
Bracket as shown above.
Diagram C. A direct Wall Mount should use the
Mounting Plate for added strength, but it is not
required for proper antenna operation.
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DIPOLE ANTENNA MOUNTING OPTIONS (CONTINUED)
Mounting Inside a Wall or Ceiling
See Diagrams D and E
The antenna may be hidden inside a wall or ceiling. IMPORTANT: Do not install the antenna inside a
metal wall or ceiling, as this would obstruct the signal.
You will use a exible dipole (the oppy wires) in this conguration. Select the correct wires for your
conguration (72 MHz or 216 MHz). Connect one antenna wire to the ground side of the Antenna
Module using one of the Hex Kep nuts provided. Connect the other wire to the active side using the
other Hex Kep nut, as noted in Diagram D below. If you are using a Mounting Bracket, you will need
to install the provided ber washer between the antenna and mounting bracket.
Secure the mounting bracket to a beam, making sure the active (non grounded) side of the antenna is
directed toward the area where the receivers will be located (see Diagram E below). Then, secure the
ends of the antenna to beams using wood screws or the provided sheet metal screws. Try to make
the wires as straight as possible, and make sure they extend in opposite directions.
9
Setup Instructions
Dipole Antenna Mounting Options
The antenna may be hidden inside a wall or ceiling. IMPORTANT: Do not install the antenna inside a
metal wall or ceiling, as this would obstruct the signal.
You will use a exible dipole (the oppy wires) in this conguration. Select the correct wires for your
conguration (72 MHz or 216 MHz). Connect one antenna wire to the ground side of the Antenna
Module using one of the Hex Kep nuts provided. Connect the other wire to the active side using the
other Hex Kep nut, as noted in Diagram D below. If you are using a Mounting Bracket, you will need to
install the provided ber washer between the antenna and mounting bracket.
Secure the mounting bracket to a beam, making sure the active (non grounded) side of the antenna
is directed toward the area where the receivers will be located (see Diagram E below). Then, secure
the ends of the antenna to beams using wood screws or the provided sheet metal screws. Try to
make the wires as straight as possible, and make sure they extend in opposite directions.
Mounting Inside a Wall or Ceiling
See Diagrams D and E
Diagram D. Flexible Dipole connection to the
Antenna Module.
Diagram E. A exible dipole can be mounted in
your ceiling or wall as shown here. Although the
Mounting Bracket is not shown here, it would be
used to secure the Antenna Module to a beam.
Hex Kep Nut
Mounting Bracket
(optional)
Hex Kep Nut
Fiber Washer
(if using Mounting Bracket)
Active Side
Ground Side
Hex Kep Nut
Mounting Bracket
(optional)
Hex Kep Nut
Fiber Washer
(if using Mounting Bracket)
Active Side
Ground Side
Coaxial Cable runs to your transmitter
or stationary receiver
End of antenna is attached to beam in ceiling or wall
Flexible Dipole
in Ceiling
Diagram E. A exible dipole can be mounted in your
ceiling or wall as shown here. Although the Mounting
Bracket is not shown here, it would be used to secure
the Antenna Module to a beam.
Diagram D. Flexible Dipole connection
to the Antenna Module.
End of antenna is attached to beam in ceiling or wall