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Table of Contents LA-122 Table of Contents Package Contents Package Contents 3 Architectural Specifications 4 Specifications 4 Setup Instructions 5 Dipole Antenna Mounting Options 8 Monopole Antenna Mounting Options 12 Optional Accessories 15 Troubleshooting 16 Compliance Notice/ FCC Statement 17 Warranty/ Contacting Listen 18 Notes 19 Specifications Setup Instructions Information 1
LA-122 Package Contents LA-122 Contents Listen Part Number 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 Amplifier LR-100-216 Stationary Receiver/Power Amplifier LR-600-072 Wireless FM Receiver/Speaker (72MHz) LR-600-216 Wireless FM Receiver/Speaker (216MHz) LA-122 Universal Remote Antenna Package Contents • Wall/Electrical Box Mounting Plate • Mounting Bracket • Antenna Modu
LA-122 Specifications Architectural Specifications 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 shall include the necessary mounting hardware to mount the antenna on a single or dual electrical box, directly on a wall, on a ceiling electrical box or on a flat surface. The antenna shall have a BNC connector and the kit shall come with 25 ft. (7.
Important Things to Note Before Starting Your 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 50 feet for 216 MHz applications or greater than 100 feet for 72 MHz applications, we recommend that you use RG-8 cable rather than RG-58.
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.
Important Things to Note Before Starting Selecting an Antenna Location The location and configuration 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 amplifier be located? We recommend that it be located no more than 25 feet (7.6 meters) from the antenna.
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.
Dipole Antenna Mounting Options 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 flexible dipole (the floppy wires) in this configuration. Select the correct wires for your configuration (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.
Dipole Antenna Mounting Options Mounting to a Mast of Conduit The antenna may be mounted to a mast, pole or section of vertical conduit. A mast made of non-conductive material works best; however, if you must use a metal mast, be sure to orient the antenna mount so the mast is not between the antenna and the designated receiving area. The Mounting Plate is not required, but will provide a stronger mount for the antenna.
Dipole Antenna Mounting Options Connecting the Dipole Antenna You have two choices of antenna with the dipole option: the rigid dipole, which has the two extendable arms, or the flexible dipole, which has the “floppy” wires with securing rings at the ends. Rigid dipole pieces screw onto the connectors at the top and bottom of the Antenna Module. Flexible dipole wires are secured using Hex Kep nuts and a fiber washer as indicated on page 7.
Monopole Antenna Mounting Options Mount to a Grounded Electrical Box, Ceiling or s from Antenna Module A monopole (single element) antenna may be mounted to a grounded light box or junction box in a ceiling or floor using the Mounting Plate and Mounting Bracket. BEFORE STARTING, reverse the Antenna Module on the Mounting Bracket, then install the Hex Kep nut on the ground post (see Diagram G at right).
Monopole Antenna Mounting Options Mount to a Metal Surface Using the Ground Plane and Shorting Plate See Diagram J It is often convenient to place an antenna on top of a metal equipment rack. In order for the antenna to function properly, it must be secured to the equipment rack using the Grounding Plate and Grounding Base. The Mounting Bracket is not used in this configuration. Remove the four nuts and screws from the Antenna Module and carefully remove it from the bracket.
Monopole Antenna Mounting Options Mounting a Monopole Antenna to a Metal Beam or Metal Ceiling See Diagram K Follow the instructions for mounting to a metal equipment rack, orienting the antenna downward rather than upward.
Optional Accessories Cable & Connectors Accessories LA-112 RG-58 50 Ohm Coaxial Cable (per ft.) LA-128 RG-8 BNC Connector LA-113 RG-8 50 Ohm Low-Loss Coaxial Cable (per ft.) LA-390 RG-8 50 Ohm Preassembled Coaxial Cable (per ft.) LA-127 RG-58 BNC Connector LA-391 RG-58 50 Ohm Preassembled Coaxial Cable (per ft.
LA-122 Troubleshooting Troubleshooting I’m not hearing anything in my receiver. ake sure the receiver’s batteries aren’t dead, that it is turned on, set to the right channel, and M the volume has been turned up. Make sure your transmitter or stationary receiver has been powered up and set to the right channel, and the desired audio has been applied. Make sure the coaxial cable has been tightly attached to both the antenna and the transmitter/ stationary receiver.
Compliance Notice & FCC Statement Compliance Notice This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) These devices may not cause harmful interference, and (2) these devices must accept any interference received, including interference that may cause undesirable operation. Listen’s LT-800 Transmitter (216 MHz only) Listen’s LT-800 transmitter is authorized by rule under the Low Power Radio Service (47 C.F.R.
Warranty & Contacting Listen Warranty Listen Technologies Corporation (Listen) warrants its transmitters and receivers (LT-82, LT-700, LT-800, LR-100, LR-42, LR-44, LR-300, LR-400, LR-500, LR-600) to be free from defects in workmanship and material under normal use and conditions for the useful lifetime of the product from date of purchase.
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Listen Technologies Corporation 14912 Heritagecrest Way Bluffdale, Utah 84065-4818, U.S.A. +1.801.233.8992 +1.800.330.0891 North America +1.801.233.8995 fax www.listentech.