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Summary of Contents for Listen Technologies LT-700-150
- Page 3 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 satisfi ed. That’s why we independently certify them to the highest quality standards and back them with a limited lifetime guarantee.
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Page 5: Table Of Contents
LT-700 Table of Contents Package Contents 150 MHz Specifi cations Quick Reference Setup Instructions Operating Instructions Programming Instructions Charging Batteries Wall Transformer Operation Channel Selection Listen SQ™ RF Reception Maximization Strategies 150 MHz Frequency Chart Troubleshooting Warranty Contact Information Optional Accessories... -
Page 7: Package Contents
LT-700 Package Contents LT-700-150 Contents • LT-700-150 (150 MHz) Listen Part Number LT-700-150 (150 MHz) Optional Accessories See page 20... -
Page 8: 150 Mhz Specifi Cations
NiMH. The portable transmitter shall incorporate automatic battery charging circuitry for recharging of NiMH batteries, with the ability to charge via a wall transformer or drop in charging case. The Listen LT-700-150 is specifi ed. RF Frequency Range... -
Page 9: Quick Reference
LT-700 Quick Reference LT-700 Front 3.5 mm Input Jack A Listen microphone or line level cable connects here. Use UP and DOWN buttons to select a channel. Press and hold either button for 5 seconds to lock the channel. Press and hold either button again to unlock. - Page 10 LT-700 Quick Reference LT-700 Inside Access Door Mic Sensitivity Switch LT-700 Top of Unit 3.5mm Input Jack A microphone or line level cable connects here. Battery Select Switch SQ Switch Mic Sensitivity Switch - it arrives set at MED, which will work for most microphones.
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Page 11: Setup Instructions
LT-700 Setup Instructions Remove the product Remove outer packaging and plastic cover. Inspect for physical damage. If damage is apparent, please contact Listen Technologies Corporation technical support for assistance. See page 19 for contact information. Open the front access door If locked, use a pocketknife or small screwdriver to unlock the door locks on both sides of the unit. - Page 12 LT-700 Setup Instructions (cont.) Place Batteries in Unit Place two (2) AA batteries in the compartment, making note of the battery polarity shown in the battery compartment, and again verifying that the BATTERY SELECT switch is in the correct position for the batteries you are using. (ALK should be selected for all battery types other than NiMH).
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Page 13: Operating Instructions
Press and hold either button again to unlock. 150 MHz Units The LT-700-150 operates on 6 wide band channels and 26 narrow band channels. Close the Access Door Lock it if desired by turning the locks on the side of the unit to the vertical position. See diagram on page 7. -
Page 14: Programming Instructions
LT-700 Programming Instructions The LT-700 can be programmed to transmit on a limited number of channels. For applications where users are required to select a channel (such as classrooms or language interpretation), and you don’t want them to have to scroll through all of the available channels, this feature is ideal. You can set up the LT-700 so that only the channels they need to use are available for selection with the UP and DOWN buttons. -
Page 15: Charging Batteries
LT-700 Charging Batteries The LT-700 and all Listen receivers are unique because they have SmartCharge™ chargers built in. When any of these units are connected to an LA-208 wall transformer or dropped into a Listen charging case, NiMH batteries will be charged. To charge the batteries using the LA-208 wall transformer, plug the transformer into the jack marked “PWR/CHG”... -
Page 16: Wall Transformer Operation
LT-700 Wall Transformer Operation The LT-700 will operate normally when connected to a wall transformer. Use Listen part number LA-208, available from any Listen dealer. Connect the wall transformer to the jack on the side of the LT-700 marked “PWR/CHG” and plug the wall transformer into a grounded AC outlet. You do not need to have batteries installed in the LT-700 to operate it with a wall transformer. -
Page 17: Channel Selection
Channel Selection It is important to choose channels that are free from interference to achieve proper operation of your Listen equipment. This process is trial and error. Before turning on the transmitter, listen to the wide band channels. Listen to the audio through the headphone or on a Listen receiver or receiver / speaker. -
Page 18: Listen Sq
Listen SQ™ - Improving your Listening Experience People are accustomed to listening to low noise, high fi delity audio (delivered via CD, DVD, etc.). FM radio systems, such as those made by Listen, have more inherent noise compared to most sound systems. To minimize noise, Listen uses a noise reduction technology called ListenSQ™. -
Page 19: Rf Reception Maximization Strategies
RF Reception Maximization Strategies For proper and dependable operation, Listen receivers should receive a strong and consistent signal from the originating transmitter. The following strategies should be used maximize this signal: a. When using your system, keep in mind that the location of both the transmitter and receiver is critical to maximizing signal strength. -
Page 20: 150 Mhz Frequency Chart
150 MHz Compatibility Chart Channel Frequency 150.900 152.400 151.500 152.100 151.200 151.800 150.850 150.950 151.000 151.050 151.100 151.150 151.250 151.300 151.350 151.400 151.450 151.550 151.600 151.650 151.700 151.750 151.850 151.900 151.950 152.000 152.050 152.150 152.200 152.250 152.300 152.350... -
Page 21: Troubleshooting
LT-700 Troubleshooting Troubleshooting The LT-700 has no power Make sure the unit has fully charged batteries, or has a Listen LA-208 wall transformer connected to it. Press the ON button. If this does not work, try a different set of batteries. Make sure the batteries are installed correctly. - Page 22 LT-700 Troubleshooting (cont.) Troubleshooting There is not sufficient range The LT-700 is a portable transmitter that uses the microphone cable as an antenna and the range will vary depending on the location of the receivers compared to the transmitter. You can only expect about 100 feet of average effective working range.
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Page 23: Warranty & Contacting Listen
Warranty & Contacting Listen Listen Technologies Corporation (Listen) warrants its transmitters and receivers (LT-82, LT-700, LT-800, LR-42, LR-44, LR-400, LR-500) 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. -
Page 24: Optional Accessories
Optional Accessories LA-261 LA-261 Lavalier Microphone Over-the-Head Microphone LA-277 LA-276 Conferencing Collar Microphone Microphone LA-311 16-Unit Portable Charging/Carrying Case LA-313 16-Unit Portable Carrying Case LA-317 4-Unit Portable Charging/Carrying Case LA-318 4-Unit Portable Carrying Case LA-320 Confi gurable Carrying Case LA-321 8-Unit Portable Charging/Carrying Case LA-322 8-Unit Portable Carrying Case LA-323 4-Unit Portable Charging/Carrying Case w/Removable Lid LA-324 8-Unit Portable Charging/Carrying Case w/Removable Lid... - Page 25 Notes...
- Page 26 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 www.listentech.com Printed in China © 2009 Listen Technologies Corporation All Rights Reserved 09162009 ®...
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