Listen Portable fm 863 Mhz, Руководство пользователя

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LR-400/500
LR-500 Specifications
Architectural Specification
The LR-500-863 FM receiver shall be capable of receiving on 17 wide band channels with a SNR of
70dB or greater. The receiver shall be programmable to electronically lock out unneeded channels.
The receiver shall be capable of seeking channels. The device shall be able to be locked on a single
channel. The device shall have an adjustable squelch. The device shall have an audio frequency
response of 50 Hz to 15 KHz, ±3 dB. 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
indicates channel, battery level, low battery, battery charging, and RF signal strength. The receiver
shall be able to function in both DX and Local mode. The unit shall operate off of 2 AA batteries. The
receiver shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The
Listen LR-500-863 is specified.
Specifications LR-500-863
RF
RF Frequency Range 863.050 - 864.950 MHz
Number of Channels 17 Wideband
Frequency Accuracy +/-.005% stability 0- 50C
Peak Deviation +/- 50 kHz
Squelch Programmable in 20 Steps
Antenna Integrated External Antenna
Compliance CE, ETSI, RoHS
Audio
System Frequency Response 50Hz - 15kHz (+/-3db)
System Signal to Noise Ratio 70db (A-Weighted)
System Distortion <2% THD @ 80% modulation
Output 3.5 mm connector, unbalanced, 0dBu nominal output level, 16 mW
maximum, impedance 32 Ohms
Controls
User Controls Channel up/down, SEEK, volume
Set-up Controls (battery compartment) NiMH/alkaline battery switch
Programming Channel Lock Out, Channel Lock On, DX/Local
Indicators
LED Red, illuminated when unit is on. Flashes when batteries are low, or to
indicate charging. Flashes when locked and SEEK is pushed.
LCD Display Channel Designation, lock status, signal strength indication, program-
ming
Power
Battery Type Type: 2 AA batteries, alkaline or NiMH
Battery Life (Listen batteries) 30 hours alkaline (LA-361), 15 hours NiMH rechargeable (LA-362)
Battery Charging (NiMH only) Fully Automatic, 14 hours maximum
Power Supply (LA-208-03) 7.5VDC, center positive 300mA. Drop in contact points for use with
charging cases. Power supply not included (LA-208-03)
Power Supply Connector 2.3 mm OD by .7mm ID, barrel type
Power Supply Compliance RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB compliant
Physical
Dimensions (H x W x D) 5.0 x 3.0 x 1.0 in (13 x 7.6 x 2.5 cm)
Color Dark Grey with white silk screening
Unit Weight 3.9 oz (111g)
Unit Weight with batteries 5.8 oz (164g)
Shipping Weight 1.0 lbs. (0.45kg)
Door Manually Lockable. Up, down, and power buttons through door. Other
controls behind door (see controls)
Environmental
Temperature - Operation -10C (14F) to +40C (104F)
Temperature - Storage -20C (-4F) to +50C (122F)
Humidity 0 to 95% Relative Humidity, non condensing
Specifications are subject to change without notification