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Portable Programable Display RF Receiver (72 MHz)

Portable Programmable Display RF Receiver (72 MHz) (Limited Quantities)

Item:LR-500-072
Limited Quantities

Combining powerful, crystal-clear audio performance with the ability to program each unit, the LR-500 Portable Programmable Display Receiver is a top-of-the-line solution for your assistive listening system. Our signature Look & Listen (TM) LCD display gives you and your users a quick, easy way to check the programming status, channel selection, battery level, signal strength, and more. And Listen Technologies’ SmartCharge (TM) system built into each unit helps to prevent overcharging (when used with NiMH rechargeable AA batteries).

Easy to use and easy to program, the LR-500 is approved for assistive listening use in the U.S. by the FCC and offers you an industry-leading option for meeting the needs of your visitors or customers.

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Includes

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

 

Highlights

  • Compact, portable, and programmable digital receiver
  • Can receive up to 17 wide-band or 40 narrow-band channels
  • Easy-to-read LCD display with programming status, battery level, channel lock, and signal strength readings
  • Channel seek capabilities and channel selector buttons on the front of the unit
  • 80 dB signal-to-noise ratio for industry-leading sound quality
  • Built-in SmartCharge feature prevents overcharging
  • Simple drop-in charging compatible with Listen Technologies’ charging cases and plugs
  • Compatible with mono and stereo headphones
  • Uses standard AA alkaline or NiMh rechargeable batteries

Specs

+Audio

Frequency Response50 Hz - 15 kHz (±3 dB)
Signal-to-Noise RatioSQ enabled: 80dB; SQ disabled 60dB
Audio Output Jacks3.5mm connectors, unbalanced, 0dBu nominal output level, 16mW maximum, impedance 32 Ohms
Distortion< 2% total harmonic distortion (THD) at 80% deviation

+Controls

User ControlsChannel up/down, SEEK, volume, Alkaline/NiMH batteries, SQ enable/disable
ProgrammingChannel lock, squelch, channel lock out

+Indicators

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

+RF

Frequency Range72.025 - 75.950 MHz
Number of Channels17 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)
SquelchProgrammable in 20 steps, automatic on loss of RF signal
Antenna TypeUses earphone cable

+Power

Power SupplyI/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 Connector2.3mm 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 TypeTwo AA batteries, alkaline or NiMH
Battery Life30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)
Battery Charging TimeFully automatic, 13 hours
ComplianceRoHS, WEEE, UL, PSE, CE, CUL, TUV, CB compliant

+Physical

Width5.00 in. (13.0 cm)
Height3.00 in. (7.6 cm)
Depth1.00 in. (2.5 cm)
ColorDark Grey with white silk screening
Unit Weight with Batteries5.8 oz (164 g)
Shipping Weight1.0 lbs. (0.5 kg)
Weight3.9 oz (111 g)
DoorManually Lockable. Up, down, and power buttons through door. Other controls behind door (see controls)

+Environmental

Temperature - Operation14 to 104º F (-10 to 40º C)
Temperature - Storage-4 to 122° F (-20 to 50° C)
Relative Humidity0 to 95% relative humidity, non-condensing

+Compliance

RFFCC Part 15, Industry Canada

FAQs

+What is the function of SQ?

To reduce noise of the systems, Listen offers a noise reduction technology called ListenSQ™. 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.

+What is the difference between the LR-400 and the LR-500?

The LR-500 gives the user an opportunity to lockout unused channels and has the controls on the outside of the front door.

+Can the LR-500 be used with multiple transmitters?

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.

+How many receivers can I have in a system?

As many as you need, the number is endless.

+How many channels can I program into the LR-500?

One to 57. The receiver has 57 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.

+How long do the batteries last on the LR-500 receiver?

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.