Listen LA-140 User manual

Dear Valued Customer,
Thank you for choosing Listen! All of us at Listen are dedicated to
providing you with the highest quality products available. We take
great pride in their outstanding performance because we care
that you are completely satised. That’s why we independently
certify them to the highest quality standards and back them with
a limited lifetime guarantee. We stand ready to answer any
questions you might have during installation or in the operation of
our products. Should you experience any problems whatsoever
with your Listen products, we are ready to help you in any way we
can with prompt, efcient customer care. Because at Listen, it’s
all about you! And should you have any comments on how we
might improve our products or our service, we’re here to listen.
801.233.8992
800.330.0891 North America
801.233.8995 fax
[email protected]
www.listentech.com
Thank you... and enjoy your listening experience!
Best regards,
The Listen Team

LA-107 Package Contents
LA-107 Contents
Antenna base assembly
Three ground radials
Mounting Hardware
50 ft. (3 m) RG 58 coaxial cable with
PL-259 and LA-127 connectors
Extra LA-127 connectors
User Manual (not shown)
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Table of Contents
Specications 3
Installation 4
Mounting 5
Shortening Coaxial Cable 6
Supplementary Information 7
Warranty 7
Contacting Listen 8
Shortening Cable InformationMountingInstallationSpecications
Table of Contents

3
Specications
LA-107 Specications
Specications
Specication LA-107
Frequency Range 216.0125 - 216.9875 MHz
Center Frequency 216.5 MHz
Antenna Type ¼ Wave, Ground Plane
Unity Gain 0 db (unity)
Beam Width 360º
Mounting Mast bracket up to 1.50 in. (4.0 cm) diameter
Size 13.50 in. (34.0 cm) base with 13.50 in. (34.0 cm) ground radials

4
Installation
Installation
1Screw ground radials into antenna base assembly and secure with
tightening nuts.
Mount your antenna in a strategic location. See “Mounting Your
LA-107” on the following page.
Connect the PL-259 end of coaxial cable to the base
of the antenna
Run coaxial cable to the LT-800 transmitter and connect the
LA-127 to the Auxiliary Antenna connection on the back of the
unit. Additional coaxial cable is available from Listen if you need
a length longer than the included 50 feet (15.24 m).
Listen recommends using RG8 cable for cable runs
greater than 50 feet (15.24 m).
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LA-107 shown with coaxial
connection to the LT-800
Stationary Transmitter

5
Mounting
Mount the antenna in a strategic location. Your antenna may be placed either
indoors or outdoors. If mounted outside, the highest elevation should not exceed
100 feet (30.5 m). The antenna should be placed in a location that will provide
the best line of sight to the receivers. Keep in mind that the higher you have the
LA-107 mounted, the more range you will get out of your receivers.
The LA-107 includes a bracket that allows it to be mast
mounted (vertical pole) up to 1.5 inches (4 cm) in diameter.
This pole can be made of metal or plastic. However, if using
a metal mast, the LA-107 should be isolated from the ground.
It is very important that your mast does not extend above the
antenna radiator. This will create interference and multi-path
to the receiver.
Mount LA-107 away from power lines, telephone lines and
metal surfaces.
For maximum range, your transmitter should be set to “High”
RF power.
Run the coaxial cable from the antenna to your device,
keeping the cable length as short as possible (see page 4,
Shortening the Coaxial Cable if necessary). To optimize the
efficiency of the LA-107, or to extend the length of your cable
run, RG-8 can be used in place of RG-58.
mast
WRONG
mast end
CORRECT
Mounting Your LA-107

6
Shortening Cable
Cut Coaxial cable to desired length leaving
PL-259 connection.
Strip back cable jacket 0.6 inches (15 mm).
Strip back cable braid 0.25 inches (6.4 mm).
Strip back cable dielectric 0.15 inches (4 mm).
Slide outer ferrule onto cable.
Slide male contact on cable center conductor so that it
butts against dielectric.
Crimp male contact in place using crimp tool. Do not
overcrimp.
Fold braid back to allow the plug body assembly to slide
under braid.
Push plug body on cable until center pin is flush with end
of plug body.
Slide outer ferrule over the braid and up against
connector body.
Crimp outer ferrule using crimp tool.
Check continuity of cable center conductor and sleeve to verify proper installation.
LA-127 Connection PL259 Connection
Shortening the Coaxial Cable (optional)
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The coaxial cable from the LT-800 to the antenna
should be kept as short as possible. Listen has
included an extra LA-127 BNC connection to install
if the length can be shortened.
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7
Information
Warranty
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.
Listen warrants its Stationary IR Radiators (LA-140) to be free from defects in workmanship and material under
normal use and conditions for three years from the date of purchase.
Listen warrants its Noise Canceling Microphone (LA-270) to be free from defects in workmanship and material
under normal use and conditions for one year from date of purchase.
All other products and accessories are warranted for 90 days from date of purchase.
This warranty is only available to the original end purchaser of the product and cannot be transferred.
Warranty is only valid if warranty card has been returned within 90 days of purchase. This warranty is void if
damage occurred because of misuse or if the product has been repaired or modified by anyone other than
a factory authorized service technician. Warranty does not cover normal wear and tear on the product or
any other physical damage unless the damage was the result of a manufacturing defect. Listen is not liable
for consequential damages due to any failure of equipment to perform as intended. Listen shall bear no
responsibility or obligation with respect to the manner of use of any equipment sold by it. Listen specifically
disclaims and negates any warranty of merchantability or fitness of use of such equipment including, without
limitation, any warranty that the use of such equipment for any purpose will comply with applicable laws and
regulations. The terms of the warranty are governed by the laws of the state of Utah.
In the first ninety days after purchase, any defective product will be replaced with a new unit. After ninety
days, Listen will, at its own discretion either repair or replace transmitters and receivers with a new unit or a unit
of similar type and condition. Product that is not covered under warranty shall be repaired or replaced with a
unit of similar type and condition based on a flat fee. Contact Listen for details.
This limited warranty, prices and the specifications of products are subject to change without notice.

8
Information
If technical service is needed, please contact Listen. Pre-authorization is required before returning
Listen products. If products were damaged in shipment, please contact the carrier, then contact
Listen for replacement or repair requirements payable by the carrier.
Listen’s corporate headquarters are located in Salt Lake City, Utah U.S.A. and are open Monday
through Friday, 8am to 5pm Mountain Time.
14912 Heritagecrest Way
Salt Lake City, Utah 84065-4818
801.233.8992
800.330.0891 North America
801.233.8995 fax
[email protected]
www.listentech.com
Contacting Listen
Contacting Listen

Listen Technologies Corporation
14912 Heritagecrest Way
Salt Lake City, Utah 84065-4818 U.S.A.
801.233.8992
800.330.0891 North America
801.233.8995 fax
www.listentech.com
[email protected]
Printed in the United States of America
© 2006 Listen Technologies Corporation® All Rights Reserved 2006 20070103