Listen Technologies LA-122 User Manual Download Page 24

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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.com

Printed in the United States of America

Summary of Contents for LA-122

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Page 3: ...you have any comments on how we might improve our products or our service 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 support listentech...

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Page 5: ...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 Compli...

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Page 7: ...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 flexi...

Page 8: ...Types Monopole and Dipole Antenna Segment Lengths same for both rigid and flexible antennas 72 MHz 39 25 in 1 0 m 216 MHz 12 25 in 31 1 cm Antenna Gain Unity Dipole Vertical Clearance 72 MHz 79 75 in...

Page 9: ...100 feet of cable and at 216 MHz there is a loss of 5 dB per 100 feet of cable A 3dB loss means half of your power has been lost However it is better to suffer coaxial power loss than to try to shoot...

Page 10: ...y 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 s...

Page 11: ...d 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 ope...

Page 12: ...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...

Page 13: ...unting 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...

Page 14: ...o the clamps and connect the Mounting Bracket to the Mounting Plate as shown in the photo at right Mounting to a Mast of Conduit IMPORTANT see Diagram F at left When installing an antenna on a metal m...

Page 15: ...nded straight satisfactory operation can still be obtained when you slightly bend the ground wire not the active one to fit around a ceiling or floor corner Connect the coaxial cable either the cable...

Page 16: ...ntenna element to the ground side of the Antenna Module see Diagram I Be sure to use the correct length element longer wire for 72 MHz shorter one for 216 MHz Connect the wire underneath the shorting...

Page 17: ...tom of the assembly Then place a Hex Kep nut on the center ground post and tighten Secure the Ground Plane to your metal rack using sheet metal screws Attach the proper Monopole antenna element to the...

Page 18: ...ntenna through the hole This antenna will provide the ground for your antenna since the non conductive surface cannot supply a ground If you are mounting the monopole upside down on a ceiling run the...

Page 19: ...ssories LA 391 RG 58 50 Ohm Preassembled Coaxial Cable per ft LA 390 RG 8 50 Ohm Preassembled Coaxial Cable per ft LA 127 RG 58 BNC Connector LA 128 RG 8 BNC Connector LA 112 RG 58 50 Ohm Coaxial Cabl...

Page 20: ...y extended in opposite directions If you are using a monopole antenna make sure it has been grounded with either the grounding plate grounding base or a flexible antenna attached to the grounding post...

Page 21: ...es is likely to result in interference to radio and TV reception The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the user s a...

Page 22: ...ble 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 Lis...

Page 23: ...Notes...

Page 24: ...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 com Printed in the United States of America 2008 Listen Technologies Co...

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