Listen LR 500 User manual

Don't miss a single sound.
• Programmability – Unneeded channels can be locked so this
receiver will access only one or more channels of your
choice.
• Exceptional audio quality! 80dB signal-to-noise ratio!
• LCD makes maintenance easy – No need to guess about the
status of your batteries or which channel you are on.
• Adjustable squelch in 20 steps mutes audio on loss of RF
signal.
• 57 Channels – Compatible with most other assistive
listening (ALS) products.
• 100 % Digital – Listen receivers are digitally-tuned so
transmission won’t drift; assurance that when you select a
channel, it stays on channel!
• For easy access the UP, DOWN and SEEK buttons are
available through the door.
• Built in SmartCharge™ won’t allow batteries to overcharge!
Charging circuitry is conveniently built into Listen’s
receivers; never worry about unplugging a transformer at a
certain time.
LR-500 Programmable Display Receiver
Listen Technologies Corporation
8535 South 700 West, Suite A
Sandy, UT 84070-2515 USA
Phone: [phone] or 1.800.330.0891
Fax: [phone]
Email: [e-mail]
Benefits
LR-500-072
or LR-500-216
Specify Part
Number
User Applications
• ADA compliance
• language interpretation
• meeting rooms
• meeting monitoring
• auditory description
• fitness centers
• convention centers
• judges chambers
• training facilities
• houses of worship
• tours
• offices
• cinemas
• schools
• trade shows
• amphitheaters
• parks
• zoos
• and many more!
updated 06.17.04 Listen®and the Listen logo are registered trademarks of Listen Technologies Corporation
Listen's LR-500 Programmable Display
Receiver features the unique Look &
Listen™ Display – Easily verify
channel selection, whether or not
channel is locked, battery level, and
RF signal strength using the LR-500's
LCD. Also, use the LCD to verify
programming status, to lock out used
channels and to adjust the units
squelch. Ease-of-use has never been
better for users and ease of
programming has never been easier
for for installers!

Don't miss a single sound. Phone: [phone] or 1.800.330.0891
Fax: [phone]
Email: [e-mail]
Listen Technologies Corporation
8535 South 700 West, Suite A
Sandy, UT 84070-2515 USA
1. Line level earphone jack (3.5mm) accepts either mono or stereo headsets.
2. Multifunction LED indicates power on, if batteries are low, and charging status.
3. Easy on/off volume control.
4. Receiver antenna is built into the earphone cord, eliminating additional wires while maximizing receiver effectiveness.
5. Manually lockable battery compartment door.
6. Charging plug port.
7. Contact points for Listen’s drop in charging cases.
8. Look&Listen™ LCD Display shows channel selection, channel lock and battery level.
9. Digitally tuned with UP, DOWN, and SEEK buttons. Electronically lock on channel by holding the SEEK button down
5 seconds to prevent tampering programmable so you can lock out used channels.
10. Uses two AA batteries. Selectable to use either alkaline or Listen’s advanced NiMH rechargeable AA batteries.
SmartCharge™ incorporated into receiver makes sure each unit receives the most beneficial charge.
11. Exclusive belt clip “loop” prevents unit from slipping off belt or strap.
12. Adjustable squelch in 20 steps mutes audio on loss of RF signal.
13. When enabled, SQ provides highest audio quality available in its product category. SQ can be disabled for compatibility
with other assistive listening equipment.
updated 06.17.04
LR-500 Features
LR-500 Programmable Display Receiver
1
5
3
7
2
9
6
5
12
8
13
2
1
3
11
10

Don't miss a single sound. Phone: [phone] or 1.800.330.0891
Fax: [phone]
Email: [e-mail]
Listen Technologies Corporation
8535 South 700 West, Suite A
Sandy, UT 84070-2515 USA
LR-500 Accessories
Listen Technologies Corporation (Listen) warrants its Receiver (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. All other
products and accessories are warranted for ninety days from date of purchase. This warranty is only available to the
original end purchaser of the product and cannot be transferred. Warranty is only valid if warranty card has been
returned within 90 days of purchase. This warranty is void if damage occurred because of misuse or if the product has
been repaired or modified by anyone other than a factory authorized service technician. Warranty does not cover
normal wear and tear on the product or any other physical damage unless the damage was the result of a manufacturing
defect. Listen is not liable 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. Listen
specifically disclaims and negates any warranty of merchantability or fitness of use of such equipment including, without
limitation, any warranty that the use of such equipment for any purpose will comply with applicable laws and
regulations. Listen will only accept returned products with prepaid shipping and with a return authorization number.
To receive a return authorization number call 1.800.330.0891 or +1.801.233.8992. Please see www.ListenTech.com or
contact Listen for warranty details.
updated 06.17.04
The FM receiver shall be capable of receiving on 57 wide and narrow band channels with a SNR of 80dB or greater.
The receiver shall be programmable to electronically lock out unneeded channels. The receiver shall be capable of
seeking channels. The device shall have an adjustable squelch. The device shall have an audio frequency response of
50Hz to 15KHz, ±3dB at 72MHz, or of 50Hz to 10kHz, ±3dB at 216MHz. The device will incorporate a stereo headset
jack that allows the user to plug in either a mono or stereo headset. The device shall incorporate an LCD display that
indicates channel, battery level, low battery, battery charging, and RF signal strength. The receiver shall incorporate
automatic battery charging circuitry for recharging of NiMH batteries. The Listen LR-500 is specified.
Architectural Specifications
Earphones Connector Options
Single Ear Bud
LA-161
Stereo Headset
LA-165
Ear Speaker
LA-164
Neckloop
LA-166
Dual Ear Bud
LA-162
Consumer
Camcorder Cable
LA-265
Professional
Camcorder Cable
LA-266
Sacrificial Cable
LA-275
Warranty

Don't miss a single sound. Phone: [phone] or 1.800.330.0891
Fax: [phone]
Email: [e-mail]
Listen Technologies Corporation
8535 South 700 West, Suite A
Sandy, UT 84070-2515 USA
Specification LR-500-072 LR-500-216
RF Frequency Range 72.025 - 75.950 MHz 216.025 - 216.975 MHz
Number of Channels 57 (17 wide, 40 narrow) 57 (19 wide, 38 narrow)
Sensitivity
Frequency Accuracy
Antenna
Antenna Connector
Squelch
Compliance
System Frequency Response 63Hz - 15kHz (±3dB) 63Hz - 10kHz (±3dB)
System Signal to Noise Ratio
(A-weighted)
SQ enabled: 80dB; SQ disabled 60dB SQ enabled: 80dB; SQ disabled 50dB
System Distortion
Output
Set Up Controls
User Controls
Programming
LCD Display
LED
Battery Type
Battery Life (Listen batteries)
Battery Charging (NiMH only)
Power Supply Connector
Compliance
Dimensions
Unit Weight
Unit Weight with batteries
Shipping Weight
Door
Temperature - Operation
Temperature - Storage
Humidity
± .005% stability 0° to 50°C (32° to 122° F)
Programmable in 20 steps
FCC Part 15, Industry Canada
Environmental
RF
Audio
Programmable channel selection (see below), alkaline/NiMH batteries
and squelch, SQ enable/disable
Controls
1.0 lbs (453.6kg)
Power
0 to 95% relative humidity, non-condensing
Manually lockable. UP, DOWN and SEEK through door, other
controls behind door (see Controls above).
Indicators
** All system specifications are wireless end-to-end
Physical
3.0 in x 1.0 in x 5 in WxDxH (7.6cm x 2.5cm x 13.cm)
5.8 oz (164.4g)
2.3mm OD by 0.7mm ID, barrel type connector. 7.5VDC, center positive <250mA. Drop in
contact points for use with Listen charging cases.
3.9oz (111g)
.6uV typical, 1 uV maximum for 12dB SINAD
-10° to 40°C (14° to 104° F)
-20° to 50°C (-4° to 122° F)
Unit can be programmed so that only desired channels are displayed. Squelch can be
adjusted for sensitivity and signal capture control. Channel selection can be locked by
holding the SEEK button 5 seconds.
Red, illuminates when unit is on. Flashes when batteries are low. Flashes when charging.
Flashes when locked and user attempts to seek to another channel.
3.5mm connector
UL Listed
3.5mm connectors, unbalanced, 0dBu nominal output level,
16mW maximum, impedance 32 Ohms
Two AA batteries, alkaline or NiMH
30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)
Uses earphone cable
Volume, channel UP/DOWN, SEEK. All controls except volume are electronically lockable.
Indicates channel, RF signal strength, lock status, squelch, battey power level and channel
programming.
Fully automatic, 14 hours
<2% total harmonic distortion (THD) at 80% deviation
LR-500 Programmable Display Receiver
updated 06.17.04
Photographs, CAD drawings, etc. available at www.ListenTech.com.