Listen Portable fm 863 Mhz, Руководство пользователя

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17
LT-700
LT-700-863 Specifications
Architectural Specification
The LT-700-863 portable FM Transmitter shall be capable of broadcasting on 17 channels. Channel tuning shall be capable of being
locked. The transmitter shall have a SNR of 70 db or greater. The output power shall be adjustable to quarter, half or full. The device
shall have an audio frequency response of 50 Hz to 15 kHz, +/-3db. The device shall incorporate a microphone sensitivity switch.
The device shall incorporate a mute switch. The unit shall operate off of 2 AA batteries. The battery door shall be capable of being
mechanically locked. The device shall incorporate an LCD display that indicates battery level, channel, channel lock, low battery,
battery charging, programming, and RF signal strength. The portable transmitter shall incorporate automatic battery charging
circuitry for recharging of NiMH batteries. The Listen LT-700-863 is specified.
Specifications LT-700-863
RF
RF Frequency Range 863.050 - 864.950 MHz
Number of Channels 17 Wideband
Frequency Accuracy +/-.005% stability 0- 50C
Transmitter Stability 50 PPM
Output Power 10mW maximum (adjustable)
Peak Deviation +/- 50 kHz
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
Microphone Input
Unbalanced, tip of 3.5mm connector, -20 dbu nominal, -30 dbu
maximum, impedance 21 ohms
Microphone Sensitivity Three position switch: high, middle, and low; 6db increments
Line Input
Unbalanced, ring of 3.5mm connector, -10dbu nominal input
level, -3dbu maximum, impedance 10K ohms
Microphone power 3VDC Bias
Controls
User Controls Power, mute, channel up/down, volume
Set-up Controls (battery compartment) Mic sensitivity, NiMH/alkaline battery switch
Programming Channel Lock Out, Channel Lock On, RF Power
Indicators
LED
Red, illuminated when unit is on. Flashes when batteries are low,
or to indicate charging. Flashes quickly when muted.
RF Power Indicated on the LCD (low, mid, high)
LCD Display Channel Designation, lock status, RF power level, programming
Power
Battery Type Type: 2 AA batteries, alkaline or NiMH
Battery Life (Listen batteries)
15 hours alkaline (LA-361), 8 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)
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