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