Architectural Specifications; Specifications - Listen LR-500 User Manual

LR-300 Specifications

Architectural Specifications

The FM receiver shall be capable of receiving on 17 wide band channels and have a SNR of 80dB or greater. The
receiver shall be capable of seeking channels. The device shall have a squelch. The device shall have an audio frequen-
cy response of 63Hz to 15KHz, ± 3dB at 72MHz. 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 receiver shall incorporate automatic battery
charging circuitry for recharging of NiMH batteries. The Listen LR-300 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
Set Up Controls
User Controls
Controls
Programming
44
Specification
.6uV typical, 1 uV maximum for 12dB SINAD
** All system specifications are wireless end-to-end
<2% total harmonic distortion (THD) at 80% deviation
3.5mm connectors, unbalanced, 0dBu nominal output level,
Alkaline/NiMH batteries, SQ enable/disable
Volume, SEEK (Channel SEEK is electronically lockable)
Channel selection can be locked by holding the
LR-300-072
72.025 - 75.950 MHz
17 (wide band)
± .005% stability 0° to 50°C (32° to 122° F)
Uses earphone cable
3.5mm connector
Automatic on loss of RF signal
FCC Part 15, Industry Canada
63Hz - 15kHz (±3dB)
SQ enabled: 80dB; SQ disabled 60dB
16mW maximum, impedence 32 Ohms
SEEK button for 5 seconds.