LR-400 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 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 of 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 and listen to the audio normally. The device shall incorporate an LCD display that indicates channel, battery level, low battery, battery charging, RF signal strength and channel lock status. The receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The Listen
Specifications
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| RF Frequency Range |
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| Number of Channels |
| 57 (17 wide, 40 narrow) | 57 (19 wide, 38 narrow) |
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| 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 |
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| Squelch |
| Programmable in 20 steps |
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| Compliance |
| FCC Part 15, Industry Canada |
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| ** All system specifications are wireless | ||
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| System Frequency Response |
| 63 | 63 |
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| System Signal to Noise Ratio | SQ™ enabled: 80dB; | SQ™ enabled: 80dB; | |
| Audio |
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| SQ™ disabled: 60dB | SQ™ disabled: 50dB |
| System Distortion |
| < 2% total harmonic distortion (THD) at 80% deviation | ||
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| 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 and SQ™ enable/disable and programmable squelch setting | ||
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| User Controls | Volume, channel UP/DOWN/SEEK (All controls except volume are electronically | ||
| Controls | lockable, and are behind the door) |
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| Squelch can be adjusted for sensitivity and signal capture control. Channel selection | |||
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| Programming | can be locked by holding the SEEK button for 5 seconds. Unit cannot be programmed | ||
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| to seek only used channels, however, it is capable of entering squelch mode. | ||
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| LCD Display | Indicates channel, RF signal strength, lock status, and squelch setting | ||
| Indicators | LED | Red, illuminates when unit is on. Flashes when batteries are low. Flashes when charg- | ||
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| ing. Flashes when locked and user attempts to seek to another channel. | |||
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| Battery Type | Two AA batteries, alkaline or NiMH |
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| Battery Life (Listen batteries) | 30 hours alkaline | ||
| Power | Battery Charging (NiMH only) | Fully automatic, 14 hours |
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| 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/carrying 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) |
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| Unit Weight | 3.9 oz. (111 g) |
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| Physical | Unit Weight with batteries | 5.8 oz. (164.4 g) |
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| Shipping Weight | 1.0 lbs. (453.6 kg) |
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| Door | Manually lockable. UP, DOWN and SEEK protected by door | ||
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| Temperature - Operation | 14 to 104º F (10 to 40º C) |
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| Environmental | Temperature - Storage |
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| Humidity | 0 to 95% relative humidity, |
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