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 frequency response of 63 Hz to 15 KHz, ± 3dB at 72 MHz. 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
Specifications
| Specification |
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| RF Frequency Range |
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| Number of Channels |
| 17 (wide band) | |
| Sensitivity |
| .6uV typical, 1 uV maximum for 12dB SINAD | |
RF | Frequency Accuracy |
| ± .005% stability 32 to 122º F (0 to 50º C) | |
Antenna |
| Uses earphone cable | ||
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| Antenna Connector |
| 3.5 mm connector | |
| Squelch |
| Automatic on loss of RF signal | |
| Compliance |
| FCC Part 15, Industry Canada | |
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| ** All system specifications are wireless | ||
| System Frequency Response |
| 63 | |
| System Signal to Noise Ratio | SQ™ enabled: 80dB; SQ™ disabled 60dB | ||
Audio | System Distortion |
| < 2% total harmonic distortion (THD) at 80% deviation | |
| Output |
| 3.5 mm connectors, unbalanced, 0dBu nomial output level, 16mW maximum, | |
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| impedance 32 Ohms | ||
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| Set Up Controls | Alkaline/NiMH batteries, SQ™ enable/disable | ||
Controls | User Controls | Volume, SEEK (Channel SEEK is electronically lockable) | ||
| Programming | Channel selection can be locked by holding the SEEK button for 5 seconds | ||
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Indicators | LED | 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. | ||||
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| Battery Type | Two AA batteries, alkaline or NiMH | ||
| Battery Life (Listen batteries) | 30 hours alkaline | ||
Power | Battery Charging (NiMH only) | Fully automatic, 14 hours | ||
Power Supply Connector | 2.3 mm OD by 0.7 mm ID, barrel type connector. 7.5VDC, center positive <250mA. | |||
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| Drop in contact points for use with Listen charging cases | |||
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| Compliance | UL Listed | ||
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| Dimensions W x D x H | 3.0 x 1.0 x 4.25 in. (7.6 x 2.5 x 13 cm) | ||
| Unit Weight | 3.9 oz. (111 g) | ||
Physical | Unit Weight with batteries | 5.8 oz. (164.4 g) | ||
| Shipping Weight | 1.0 lbs. (453.6 kg) | ||
| Door | Manually lockable. SEEK behind the door. | ||
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| Temperature - Operation | 14 to 104º F (10 to 40º C) | ||
Environmental | Temperature - Storage | |||
| Humidity | 0 to 95% relative humidity, | ||
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