Architectural Specifications; Specifications - Listen LR-500 User Manual

LR-500 Specifications

Architectural Specifications

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 seek-
ing channels. The device shall have an adjustable squelch. The device shall have an audio frequency response of 63Hz
to 15KHz, ±3dB at 72MHz, or of 63Hz 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 indi-
cates channel, channel lock or lock status, 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.

Specifications

RF Frequency Range
Number of Channels
Sensitivity
Frequency Accuracy
RF
Antenna
Antenna Connector
Squelch
Compliance
System Frequency Response
System Signal to Noise Ratio
Audio
(A-weighted)
System Distortion
Output
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6
Specification
72.025 - 75.950 MHz
57 (17 wide, 40 narrow)
** All system specifications are wireless end-to-end
63Hz - 15kHz (±3dB)
SQ enabled: 80dB; SQ disabled 60dB
LR-500-072
.6uV typical, 1 uV maximum for 12dB SINAD
± .005% stability 0° to 50°C (32° to 122° F)
Uses earphone cable
3.5mm connector
Programmable in 20 steps
FCC Part 15, Industry Canada
SQ enabled: 80dB; SQ disabled 50dB
<2% total harmonic distortion (THD) at 80% deviation
3.5mm connectors, unbalanced, 0dBu nominal output level,
16mW maximum, impedance 32 Ohms
LR-500-216
216.025 - 216.975 MHz
57 (19 wide, 38 narrow)
63Hz - 10kHz (±3dB)