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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. We stand ready to answer any questions you might have during installation or in the operation of our products. Should
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LT-700 Table of Contents Package Contents 3 150 MHz Specifi cations 4 Quick Reference 5 Setup Instructions 7 Operating Instructions 9 Programming Instructions 10 Charging Batteries 11 Wall Transformer Operation
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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 3
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LT-700 Specifi cations Architectural Specifi 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 Hz to 15 KHz (±3 dB). The device will incorporate a mute switch. The battery door shall be capable of being mechanically locked. The device shall incorpora
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LT-700 Quick Reference LT-700 Front MUTE / TALK switch (more information on page 9) 3.5 mm Input Jack A Listen microphone or line level cable connects here. Look & Listen Display™ The display shows level, channel, battery status, PROGRAM mode, 150 whether a channel is locked, and whether a channel is locked out from selection (PROGRAM mode). See close-up below. Use UP and DOWN buttons to select a channel. Press and hold either button for 5 seconds to lock Power Switch the channel. Press
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LT-700 Quick Reference LT-700 Inside Access Door Battery Select Switch SQ Switch Mic Sensitivity Switch 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, otherwise, leave it in the Alkaline position. SQ Switch: shipped in the O
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LT-700 Setup Instructions 1 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 2 If locked, use a pocketknife or small screwdriver to unlock the door locks on both sides of the unit. To unlock the door, rotate the lock 1/4 turn counterclockwise. Grip the two tabs with your thumb and index
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LT-700 Setup Instructions (cont.) Place Batteries in Unit 6 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). NOTE: Listen uses 2300mAh (milli-Amp-hour) constant current NiMH (Nickel Metal Hydride) batteries. These may be purchased from your Listen deale
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LT-700 Operating Instructions 1 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 2 Please refer to Channel Selection on page 13 for guidelines on choosing an interference-free channel. To select a channel, press either the channel UP or DOWN button until the display reads the channel you want. To lock your selection, press and hold the UP or DOWN button for 5 secon
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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. 1 Enter PROGRAM Mode Press and hold the UP and D
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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. Connect LA-208 here and plug 1 To charge the batteries using the LA-208 wall transformer, plug the it into an AC wall outlet. transformer into the jack marked “PWR/CHG” on the side of the unit. The unit can be operated while the ba
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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. NOTE: If batteries are in the unit ensure that the battery selection switch is set properl
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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 with the least amount of interface. Unless you are interfacing with an existing narrowband transmission system, always use a wide band channel. If yo
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Listen SQ™ - Improving your Listening Experience • SQ is NOT squelch 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 • Improves noise inherent noise compared to most sound systems. To minimize noise, Listen uses a performance by at least noise reduction technology called ListenSQ™. Both the transmitter and receiver 20dB must have the SQ feature enabled to achieve the desired re
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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. b. Eliminate or minimize obstructions between the transmitter and the receivers. c. Minimize the distance between the tra
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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 28 152.150 29 152.200 30 152.250 31 152.300 32 152.350 16
