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Listen Technologies LT-700-150 - page 1
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Listen Technologies LT-700-150 - page 2
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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 satis fi ed. That’s why we independently certify them to the highest quality standards and back them with ...
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Listen Technologies LT-700-150 - page 4
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Listen Technologies LT-700-150 - page 5
1 Package Contents 3 150 MHz Speci fi cations 4 Quick Reference 5 Setup Instructions 7 Operating Instructions 9 Programming Instructions 10 Charging Batteries 11 Wall Transformer Operation 12 Channel Selection 13 Listen SQ™ 14 RF Reception Maximization Strategies 15 150 MHz Frequency Chart 16 Troubleshooting 17 Warranty 19 Contact Information 19 ...
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Listen Technologies LT-700-150 - page 6
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Listen Technologies LT-700-150 - page 7
3 LT-700 Package Contents Optional Accessories See page 20 Listen Part Number LT-700-150 (150 MHz) LT-700-150 Contents • LT-700-150 (150 MHz) ...
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Listen Technologies LT-700-150 - page 8
4 LT-700 Speci fi cations Architectural Speci fi cations The portable FM transmitter shall be capable of broadcasting on 32 channels. The unit shall incorporate a microphone sensitivity switch. The device shall broadcast on both wide and narrow band channels with a SNR of 80 dB or greater. The device shall have an audio frequency response of 50 H ...
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Listen Technologies LT-700-150 - page 9
5 LT-700 Quick Reference LT-700 Front 3.5 mm Input Jack A Listen microphone or line level cable connects here. MUTE / TALK switch (more information on page 9) Power Switch Press PWR switch to turn unit on. Press and hold to turn unit off. When in PROGRAM mode, this switch is used to toggle the lock out (L/O) mode for a channel. Press and hold both ...
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Listen Technologies LT-700-150 - page 10
6 LT-700 Inside Access Door Mic Sensitivity Switch - it arrives set at MED, which will work for most microphones. If your mic level is too low, change the switch to HI; if the level is too high, switch to LO. (see page 7 for more information) Battery Select Switch - place in NiMH position ONLY if you are using Nickel Metal Hydride batteries, otherw ...
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Listen Technologies LT-700-150 - page 11
7 LT-700 Setup Instructions 1 2 3 4 5 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. WARNING: Do not place the BATTERY switch in the NiMH position if you are not usin ...
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Listen Technologies LT-700-150 - page 12
8 LT-700 Setup Instructions (cont.) 6 7 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 N ...
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Listen Technologies LT-700-150 - page 13
9 LT-700 Operating Instructions 1 3 2 Make sure the unit is on When you press the power button, the LED on top of the unit will be illuminated and the LCD display will be visible. Select the channel for transmitting Please refer to Channel Selection on page 13 for guidelines on choosing an interference-free channel. To select a channel, press eithe ...
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Listen Technologies LT-700-150 - page 14
10 LT-700 Programming Instructions 1 2 3 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 ...
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Listen Technologies LT-700-150 - page 15
11 1 LT-700 Charging Batteries 2 3 Connect LA-208 here and plug it into an AC wall outlet. IMPORTANT: DO NOT ATTEMPT TO CHARGE ANY TYPE OF BATTERY OTHER THAN NiMH (NICKEL METAL HYDRIDE) with your Listen equipment . Alkaline batteries may explode when connected to a charger. Other risks of charging non-NiMH batteries include destruction of property ...
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Listen Technologies LT-700-150 - page 16
12 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 opera ...
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Listen Technologies LT-700-150 - page 17
13 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. Choose a channel ...
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Listen Technologies LT-700-150 - page 18
14 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™. Both the ...
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Listen Technologies LT-700-150 - page 19
15 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 maxi ...
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Listen Technologies LT-700-150 - page 20
16 150 MHz Compatibility Chart Channel Frequency 01 150.900 02 152.400 03 151.500 04 152.100 05 151.200 06 151.800 07 150.850 08 150.950 09 151.000 10 151.050 11 151.100 12 151.150 13 151.250 14 151.300 15 151.350 16 151.400 17 151.450 18 151.550 19 151.600 20 151.650 21 151.700 22 151.750 23 151.850 24 151.900 25 151.950 26 152.000 27 152.050 28 1 ...
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Listen Technologies LT-700-150 - page 21
17 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. There is no audio Make sure the MUTE/TALK switch is ...
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Listen Technologies LT-700-150 - page 22
18 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. It’s confusing for ...
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Listen Technologies LT-700-150 - page 23
19 Warranty & Contacting Listen Warranty 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. Listen warrants its Stat ...
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Listen Technologies LT-700-150 - page 24
20 Accessories Optional Accessories LA-261 Lavalier Microphone LA-262 Over-the-Head Microphone LA-270 Noise Canceling Microphone LA-274 Hand-Held Microphone LA-276 Collar Microphone LA-277 Conferencing Microphone LA-278 Behind-the-Head Microphone LA-279 Over-the-Ear Microphone Presentation Style LA- 26 1 Ll i M i h LA- 278 LA 2 2 2 LA -2 2 2 2 LA-2 ...
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Listen Technologies LT-700-150 - page 25
21 Notes ...
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Listen Technologies LT-700-150 - 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 fax www.listentech.com Printed in China © 2009 Listen Technologies Corporation ® All Rights Reserved 09162009 ...
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