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16

Information

LA-122 Troubleshooting

Troubleshooting

I’m not hearing anything in my receiver.

 

 

 

 Make sure the receiver’s batteries aren’t dead, that it is turned on, set to the right channel, and 

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.

 

Make sure you have used 50 ohm coaxial cable.

 

Make sure the antenna element(s) has been securely attached to the  Antenna Module.

I’m getting a signal, but it isn’t very strong.

 

 Make sure you are using the correct antenna element(s) for your operating band (72 MHz or 

216 MHz). Antennas for 72 MHz are longer than those used for 216 MHz.

 

 If you are using a dipole antenna, make sure both elements are securely attached to the Antenna 

Module and that they have been fully 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 fl exible antenna attached to the grounding post on the Antenna 

Module.

 

 Make sure the active element of the antenna is directed toward the area where the receivers are 

being used and that the ground side is directed AWAY from the receive area.

 

Make sure the antenna has been placed in an area free of metal obstructions.

 

 Check the operating power of your transmitter - there are three settings, ¼, ½ and full power. 

Increase the power if it’s low.

My signal is strong but it is distorted.

 

 

 

Make sure your transmitter or stationary receiver is on the same channel as the receivers.

 

Make sure you are not too close to the antenna.

 

 

Lower the level of the audio signal being fed into the transmitter.

If you are still having problems after checking the above items, call Listen for help. We are available from 

8am to 5pm Mountain time, Monday through Friday, at 800.330.0891 or 801.233.8992, or you can e-mail us 

at [email protected]. Our full contact information is available on page 1 of this manual.

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...

Page 6: ......

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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