Listen Technologies LR-400-150 User manual

LR-400-150 1
Listen Technologies Corporation All rights reserved 20091001
Listen Technologies Corporation • 14912 Heritagecrest Way • Bluffdale • Utah 84065-4818 U.S.A.
+1.801.233.8992 • 1.800.330.0891 North America •+1.801.233.8995 Fax
LR-400-150
Portable Display FM Receiver
The LR-400-150 Portable Display FM Receiver is our most popular model of receiver. This receiver is excellent for assistive listening, language
interpretation, tour group or personal use – anywhere you need to receive transmitted audio. The LCD display is this receivers most desired
feature – it makes it easy to view the selected channel, battery life, channel lock, and RF signal strength. It can be tuned to all frequencies
available in our 150 MHz products; once a frequency is selected it can be locked to prevent tampering. The LR-400-150 offers exceptional
audio quality and convenient recharging options. Whether its voice or music, the LR-400-150 allows everyone in the audience to have a
personally enhanced audio experience.
Configurations
LR-400-150
Includes
Used With
Architectural Specifications
Highlights
• Look & Listen™ LCD shows channel, battery status, channel lock
and signal strength.
• Superior audio quality – 80 dB signal-to-noise ratio (SNR), setting
the industry’s sound quality standard.
• With a choice between 32 channels, Listen products are ideal for
a wide range of applications.
• 100 % Digital – Listen receivers are digitally-tuned so the transmission
won’t drift; assurance that when you select a channel, it stays on
the channel.
• Limited Lifetime Warranty with hassle-free support.
• Uses standard alkaline or nickel-metal hydride (NiMH) batteries.
• Built in SmartCharge™ won’t allow batteries to overcharge.
Charging circuitry is conveniently built into Listen’s receivers.
LR-400-150 Portable Display FM Receiver (150 MHz)
Quick Reference Card
LT-700-150 Portable FM Display Transmitter (150 MHz)
LT-800-150 Stationary FM Transmitter (150 MHz)
LR-400-150 Portable Display FM Receiver
The FM receiver shall be capable of receiving on 32 channels. The receiver shall have a SNR of 80 dB or greater. The receiver shall be
capable of seeking for open channels and locked on an active channel. The device shall have a squelch. The unit shall have an audio
frequency response of 50 Hz to 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 two (2) AA alkaline or NiMH batteries. The Listen LR-400-150 is specified.

LR-400-150 2
Listen Technologies Corporation All rights reserved 20091001
Listen Technologies Corporation • 14912 Heritagecrest Way • Bluffdale • Utah 84065-4818 U.S.A.
+1.801.233.8992 • 1.800.330.0891 North America •+1.801.233.8995 Fax
LR-400-150
Portable Display FM Receiver
Functionality Quick Reference
Battery Level Indicator
Channel Display: Displays the
current channel.
RF Receive
Indicator: Indicates
the RF receive level.
Lock Icon: Indicates the unit is
locked on current channel.
150
Seek Button: Allows the user to
search for or lock onto an
active channel
3.5 mm Output Jack:
Connect a Listen
earphone(s) here.
Look&Listen™ Display: Shows
receive level, battery status,
and lock status.
Battery Compartment:
Place two (2) AA batteries
in compartment. Be sure to
follow polarity pattern.
On/Off and Volume Control Dial
Battery Select Switch: Choose
the type of batteries being
used - Alkaline or NiMH.
Power/Charging Port
Front Door Lock
LED: When lit, unit is on. When batteries are
low or when charging the LED flashes.
Channel Select UP/DOWN
SQ™ Switch: Turns SQ™
(companding) On/Off.

LR-400-150 3
Listen Technologies Corporation All rights reserved 20091001
Listen Technologies Corporation • 14912 Heritagecrest Way • Bluffdale • Utah 84065-4818 U.S.A.
+1.801.233.8992 • 1.800.330.0891 North America •+1.801.233.8995 Fax
LR-400-150
Portable Display FM Receiver
Specifications*
Audio
RF Frequency Range 150.8000 MHz - 152.3500 MHz
Number of Channels 6 wide band, 26 narrow band
Sensitivity .6uV typical, 1 uV maximum for 12 dB sinad
Frequency Accuracy ± .005% stability 32 to 122 ºF (0 to 50 ºC)
Antenna Uses earphone cable
Squelch Programmable in 20 steps, automatic on loss of RF signal
System Frequency
Response 50 Hz - 15 kHz (±3 dB)
System Signal to Noise Ratio SQ enabled 80 dB, SQ disabled 60 dB
System Distortion <2% total harmonic distortion (THD) at 80% deviation
Output 3.5 mm (0.14 in.) connectors, unbalanced, 0 dBu nominal output level,
16 mW maximum, impedance 32 ohm
Controls &
Indicators
User Controls Channel up/down, SEEK, volume
Set-up Controls (Battery
Compartment) Alkaline/NiMH batteries, SQ enable/disable
Programming Channel lock, squelch
LED Red, illuminated when unit is on, flashes when batteries are low or to indicate charging,
flashes when locked and SEEK is pushed
Display Channel designation,battery level, battery charging,
RF signal strength and channel lock
Power
Battery Type Two (2) AA batteries, alkaline or NiMH
Battery Life (Listen Batteries) 30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)
Battery Charging
(NiMH only) Fully automatic, 13 hours
Power Supply I/P 120 VAC; O/P 7.5 VDC 250 mA, drop in contact points for use with charging cases, power
supply not included (LA-208)
Power Supply Connector 0.09 in. (2.3 mm) OD by 0.7 mm ID, barrel type connector 7.5 VDC, center positive <250 mA,
drop in contact points for use with Listen charging cases
Power Supply Compliance RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB
Physical
Dimensions (H x W x D) 4.25 x 2.75 x 1.50 in. (10.8 x 7.0 x 3.8 cm)
Color Dark Grey with white silk screening
Unit Weight 3.9 oz (111 g)
Unit Weight with batteries 5.8 oz (164 g)
Shipping Weight 6.1 oz (173 g)
Door Manually lockable (on sides), SEEK/channel select behind the door
Environmental
Temperature - Operation 14 to 104 ºF (-10 to 40 ºC)
Temperature - Storage (-)4 to 122 °F (-20 to 50 °C)
Humidity 0 to 95% relative humidity, non-condensing
* Specifications are subject to change without notification.