Architectural Specifi Cations; Specifi Cations - Listen Technologies LR-300 User Manual

LR-500 Specifi cations
Architectural Specifi cations
The FM reciever 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 63 Hz to 15 KHz, ± 3dB at 72 MHz, or 63 Hz to 10
KHz, ±3dB at 216 MHz. 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, channel lock or lock status, battery level, battery charging, and RF signal strength. The
receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The
Listen LR-500 is specifi ed.
Specifi cations
RF Frequency Range
Number of Channels
Sensitivity
Frequency Accuracy
RF
Antenna
Antenna Connector
Squelch
Compliance
System Frequency Response
System Signal to Noise Ratio (A-weighted) SQ™ enabled: 80dB;
Audio
System Distortion
Output
Set Up Controls
User Controls
Controls
Programming
LCD Display
Indicators
LED
Battery Type
Battery Life (Listen batteries)
Battery Charging (NiMH only)
Power
Power Supply Connector
Compliance
Dimensions W x D x H
Unit Weight
Unit Weight with batteries
Physical
Shipping Weight
Door
Temperature - Operation
Environmental Temperature - Storage
Humidity
Specifi cation LR-500-072
72.025-75.950 MHz
57 (17 wide, 40 narrow)
.6uV typical, 1 uV maximum for 12dB SINAD
± .005% stability 32 to 122º F (0 to 50º C)
Uses earphone cable
3.5 mm connector
Programmable in 20 steps
FCC Part 15, Industry Canada
** All system specifi cations are wireless end-to-end
63 Hz-15 Hz (±3dB)
SQ™ disabled: 60dB
< 2% total harmonic distortion (THD) at 80% deviation
3.5 mm connectors, unbalanced, 0dBu nomial output level, 16mW maximum,
impedance 32 Ohms
Programmable channel selection (see below), alkaline/NiMH batteries and squelch,
SQ™ enable/disable
Volume, channel UP/DOWN/SEEK. All controls except volume are electronically
lockable
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 for 5 seconds.
Indicates channel, RF signal strength, lock status, squelch, battery power level and
channel programming
Red, illuminates when unit is on. Flashes when batteries are low. Flashes when charg-
ing. Flashes when locked and user attempts to seek to another channel.
Two AA batteries, alkaline or NiMH
30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)
Fully automatic, 14 hours
2.3 mm OD by 0.7 mm ID, barrel type connector. 7.5VDC, center positive <250mA.
Drop in contact points for use with Listen charging cases
UL Listed
3.0 x 1.0 x 4.25 in. (7.6 x 2.5 x 13 cm)
3.9 oz. (111 g)
5.8 oz. (164.4 g)
1.0 lbs. (453.6 kg)
Manually lockable. UP, DOWN and SEEK through door, other controls behind door
(see Controls above)
14 to 104º F (10 to 40º C)
-4 to 122º F (-20 to 50º C)
0 to 95% relative humidity, non-condensing
LR-500-216
216.025-216.975 MHz
57 (19 wide, 38 narrow)
63 Hz-10 kHz (±3dB)
SQ™ enabled: 80dB;
SQ™ disabled: 50dB
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