Stationary transmitter, portable transmitter, programmable display receiver, display receiver, digital receiver, stationary receiver / power amplifier, this manual is for both 72 and 216mhz systems (48 pages)
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Should you experience any problems whatsoever with your Listen products, we are ready to help you in any way we can with prompt, efficient customer care. Because at Listen, it’s all about you! And should you have any comments on how we might improve our products or our service, we’re here to listen.
The device shall incorporate an LCD display. The receiver shall incorporate automatic battery charging circuitry. The device shall be able to use of two (2) alkaline or NiMH batteries.
LR-500 Quick Reference LED: When lit, unit is on. When batteries are low or when charging the LED flashes. 3.5 mm Output Jack: Connect a Listen On/Off and Volume Control Dial earphone(s) here. Look&Listen™ Display: Shows receive level, channel, Power/Charging Port programming, battery status, and lock status.
(ALK should be selected for all battery types other than NiMH). NOTE: Listen provides industrial strength AA alkaline batteries (part number LA-361) and high performance AA Nickel Metal Hydride batteries (part number LA-362). These may be...
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Connect an Earphone or Headset Your headset or earphone will connect to the jack on the top of the unit. Either mono or stereo connectors may be used with a Listen receiver. Make certain you push the plug all the way into the jack.
Find an audio transmission using SEEK Another way to find a channel on the LR-500 is to use the SEEK button. When you do this, the Listen receiver looks for the next active channel. Sometimes the unit will mistake interference for a real broadcast signal.
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LR-500 Operation Instructions To Lock into Only One Channel Press and hold the SEEK button for 5 seconds to lock a receiver onto the currently tuned channel. Press and hold the button again to unlock. When locked the LED on top of the unit will flash when you press the SEEK button.
LR-500 Programming Instructions The LR-500 Display Receiver has some special features not available in the other receivers: you may lock out unwanted channels, and you can adjust the squelch in the unit. Locking Out Unwanted Channels For applications where users are required to select a channel (such as language interpretation or classrooms), and you don’t want them to have to go through all 32 available channels to find the appropriate channel, you can lock out all channels except the ones you are using in your facility.
• Press and hold the seek button; while still holding seek turn the ON/OFF dial to turn the unit on. • Release the seek button when the Listen name disappears and a two digit display is seen. To adjust the Squelch level •...
LR-500 Charging Batteries The LR-500 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.
The LR-500 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 LR-500 marked “PWR/CHG” and plug the wall transformer into a grounded AC outlet.
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LR-400 Package Contents LR-400 Contents • LR-400 Portable Display FM Receiver (150 MHz) Listen Part Number •LR-400-150 (150 MHz)
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15 kHz (±3 dB). The device shall incorporate a stereo headset jack that allows the user to plug in either a mono or stereo headset and listen to audio normally. The device shall incorporate an LCD display. The receiver shall incorporate automatic battery charging circuitry. The device shall be able to use of two (2) alkaline or NiMH batteries.
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LR-400 Quick Reference LED: When lit, unit is on. When batteries are low or when charging the LED flashes. 3.5 mm Output Jack: Connect a Listen On/Off and Volume Control Dial earphone(s) here. Look&Listen™ Display: Shows receive level, battery status, Power/Charging Port and lock status.
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(ALK should be selected for all battery types other than NiMH). NOTE: Listen provides industrial strength AA alkaline batteries (part number LA-361) and high performance AA Nickel Metal Hydride batteries (part number LA-362). These may be...
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Connect an Earphone or Headset Your headset or earphone will connect to the jack on the top of the unit. Either mono or stereo connectors may be used with a Listen receiver. Make certain you push the plug all the way into the jack.
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Find an audio transmission using SEEK Another way to find a channel on the LR-400 is to use the SEEK button. When you do this, the Listen receiver looks for the next active channel. Sometimes the unit will mistake interference for a real broadcast signal.
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LR-400 Operation Instructions To Lock into Only One Channel Press and hold the SEEK button for 5 seconds to lock a receiver onto the currently tuned channel. Press and hold the button again to unlock. When locked the LED on top of the unit will flash when you press the SEEK button.
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• Press and hold the seek button; while still holding seek turn the ON/OFF dial to turn the unit on. • Release the seek button when the Listen name disappears and a two digit display is seen. To adjust the Squelch level •...
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LR-400 Charging Batteries The LR-400 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.
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The LR-400 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 LR-400 marked “PWR/CHG” and plug the wall transformer into a grounded AC outlet.
Listen equipment. This process is trial Wide Band Recommendation and error. Before turning on the transmitter, listen to the wide band Listen recommends that you always channels on the receivers (channels 1-6). Listen to the audio through...
Listen systems, including the system you received in this shipment. older version Listen products If you are planning to use this product with older Listen systems that • S Q is NOT compatible with do not have Listen SQ, or equipment not manufactured by Listen, you must disable Listen SQ.
If you need to run cable over a length greater than 75 feet for 150 MHz applications or to maxi- mize broadcast range, Listen recommends that you use RG-8 cable rather than RG-58. RG-8 is a lower loss cable, meaning that more of your signal will reach the antenna.
Troubleshooting The receiver has no power. Make sure the unit has either fully charged batteries or a Listen approved wall transformer connected. Make sure the VOLUME knob has been rotated to the ON position. If this does not work, try a different set of batteries. Make sure the batteries are installed properly.
Make sure the battery switch is in the NiMH setting and that you are using NiMH (Nickel Metal Hydride) batteries. Make sure you are using only a Listen supplied charging unit or transformer. Never try to charge alkaline or NICAD batteries.
Utah. In the first ninety days after purchase, any defective product will be replaced with a new unit. After 90 days, Listen will, at its own discretion either repair or replace transmitters and receivers with a new unit or a unit of similar type and condition.
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Optional Accessories Accessories LA-361 High Capacity AA Alkaline Batteries (2) 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 Configurable Carrying Case LA-321 8-Unit Portable Charging/Carrying Case LA-322 8-Unit Portable Carrying Case LA-362 LA-323 4-Unit Portable Charging/Carrying Case w/Removable Lid Rechargeable AA NiMH...
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