Portable Programmable Display RF Receiver (72 MHz)

LR-500-072

Portable Programmable Display RF Receiver (72 MHz)

$220.00

This product is available through authorized resellers.

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Overview

Download Product Data Sheet

One of Listen’s most sophisticated receivers, the LR-500 Portable Programmable Display Receiver offers the signature Look&Listen^TM LCD Display that shows programming status, channel, lock, battery level, and RF signal strength. Channel selector buttons are easily accessible on the front of the unit. It has channel SEEK capability and is compatible with mono or stereo headsets. It takes AA batteries (alkaline or NiMH rechargeable). SmartCharge^TM capabilities prevent overcharging. It’s easy to use, easy to program.

This product is approved by the FCC for use in the US. Please note that they cannot be used in all countries. Check with your local government or specific regulation with regard to broadcast frequency in your specific country. Note: FCC rules limit the use of this product to assistive listening.

Includes

One (1) LR-500-072 Portable Programmable Display FM Receiver (72 MHz)
One (1) Owner’s Manual (72 MHz)

Highlights

Superior Audio Quality – 80 dB signal-to-noise ratio, setting the industry’s sound quality standard
A choice between 57 channels, complete antenna and accessory options make Listen products ideal for a wide range of applications
Programmability – Unneeded channels can be locked so this receiver will access only one or more channels of your choice
100 % Digital – Listen receivers are digitally-tuned so transmission won’t drift; assurance that when you select a channel, it stays on the channel
Uses standard alkaline or NiMH batteries
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
Transformer charging plug or for the ultimate convenience drop in charging contacts
Limited Lifetime Warranty with hassle-free support

Configurations & Architectural Specs

Configurations

LR-500-072 Portable Programmable Display RF Receiver (72 MHz)
LR-500-216 Portable Programmable Display RF Receiver (216 MHz)

Architectural Specs

The RF receiver shall be capable of receiving on 57 wide and narrow band channels.The receiver shall have a SNR of 80 dB 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 a squelch. The device shall have an audio frequency response of 50 Hz to 15 KHz, ‘± 3 dB at 72 MHz and 50 – 10 kHz (‘±3dB) at 216 MHz. 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 that indicates channel, battery level, low battery, battery charging, RF signal strength and channel lock status. The receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The device shall have a switch able option for the use of (2) alkaline or (2) NiMH batteries. The Listen LR-500-072 or LR-500-216 is specified.

Product Specifications

Specification LR-500-072

Audio

Frequency Response	50 Hz - 15 kHz (±3 dB)
Signal-to-Noise Ratio	SQ enabled: 80dB; SQ disabled 60dB
Audio Output Jacks	3.5mm connectors, unbalanced, 0dBu nominal output level, 16mW maximum, impedance 32 Ohms
Distortion	< 2% total harmonic distortion (THD) at 80% deviation

Controls

User Controls	Channel up/down, SEEK, volume, Alkaline/NiMH batteries, SQ enable/disable
Programming	Channel lock, squelch, channel lock out

Indicators

LCD	Channel Designation, lock status, signal strength indication, programming
LEDs	Red, illuminated when unit is on. Flashes when batteries are low, or to indicate charging. Flashes when locked and SEEK is pushed.

RF

Frequency Range	72.025 - 75.950 MHz
Number of Channels	17 wide band, 40 narrow band
Sensitivity	.6uV typical, 1 uV maximum for 12 dB sinad
Frequency Accuracy	± .005% stability 32 to 122º (0 to 50ºC)
Squelch	Programmable in 20 steps, automatic on loss of RF signal
Antenna Type	Uses earphone cable

Power

Power Supply	I/P 120VAC; O/P 7.5VDC 250 mA; Drop in contact points for use with charging cases. Power supply not included (LA-208)
Power Supply Connector	2.3mm OD by 0.7mm ID, barrel type connector 7.5 VDC, center positive < 250mA. Drop in contact points for use with Listen charging cases
Battery Type	Two AA batteries, alkaline or NiMH
Battery Life	30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)
Battery Charging Time	Fully automatic, 13 hours
Compliance	RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB compliant

Physical

Width	5.00 in. (13.0 cm)
Height	3.00 in. (7.6 cm)
Depth	1.00 in. (2.5 cm)
Color	Dark Grey with white silk screening
Unit Weight with Batteries	5.8 oz (164 g)
Shipping Weight	1.0 lbs. (0.5 kg)
Weight	3.9 oz (111 g)
Door	Manually Lockable. Up, down, and power buttons through door. Other controls behind door (see controls)

Environmental

Temperature - Operation	14 to 104º F (-10 to 40º C)
Temperature - Storage	-4 to 122° F (-20 to 50° C)
Relative Humidity	0 to 95% relative humidity, non-condensing

Compliance

RF	FCC Part 15, Industry Canada

Requirements

FAQ

Q	What is the difference between the LR-400 and the LR-500?
	A	The LR-500 gives the user an opportunity to lockout unused channels.
Q	Can the LR-500 be used with multiple transmitters?
	A	Yes. We recommend the LR-500 for use with multiple transmitters. The LR-500 is programmable and can be set to just those channels you need.
Q	How many channels can I program into the LR-500?
	A	1 to 57 (17 channels with 863 MHz). The receiver has 57 (17 channels with 863 MHz) channels and you can program it to have just the channels you want to access. It can be a two channel receiver, a 12 channel receiver, or keep all channels.
Q	How many receivers can I have in a system?
	A	As many as you need, the number is endless.
Q	What is the function of SQ?
	A	To reduce noise of its systems, Listen now offers a noise reduction technology called ListenSQâ„¢ (on 72 MHz and 216 MHZ only). Both the transmitter and receiver must have SQ on to achieve the desired results. If you are planning to use this product with older Listen systems or equipment not manufactured by Listen, you should disable SQ
Q	What is the warranty of Listen receivers?
	A	Limited lifetime warranty. The following cases will void the warranty: â€¢ Misuse, dropping, or any other noticeable cosmetic damage. â€¢ Charging alkaline batteries instead of NiMH. â€¢ Overheating the charging process by closing the lid on the charging case.
Q	How long do the batteries last on the LR-500 receiver?
	A	Alkaline batteries last 30 hours. NiMH rechargeable batteries last 15 hours (72 MHz and 216 MHz). With 863 MHz, Alkaline batteries last 20 hours and NiMH rechargeable batteries last 10 hours.

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