Listen LR 400, Design Manual & Manual

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The Stationary 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
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LT-800-863
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 ERP
Peak Deviation +/- 50 kHz
Antenna LA-129 90° Articulating Antenna (863 MHz)
Antenna Connector BNC
Compliance CE, ETSI, RoHS
Audio
System Frequency Response 50Hz - 15kHz (+/-3 db)
System Signal to Noise Ratio 70db (A-Weighted)
System Distortion <2% THD @ 80% modulation
Audio Input 1
Rear Panel. Female XLR and 1/4 in combo connector, balanced, 0/-55 dBU (line/mic) nominal input
level adjustable, -30/+21 dBU (line/mic) maximum input level, impedance 20k/1k ohms (line/mic),
phantom power +12VDC
Audio Input 2
Rear Panel. (2) Phono Connectors, unbalanced, -10/+10dbu nominal input level adjustable, +30 dBU
maximum, impedance 100K ohms
Audio Processing (Process) Compression can be turned on/off. Slope internally adjustable from 1:1 to 4:1. Default 2:1
Contour Cuts and boosts frequencies above 5kHz
Combined Audio Output (Mix)
Input 1 and Input 2 Mixed Output (Rear Panel). (2) phono connectors, unbalanced, -10 dBU nominal
output level, +19dbu maximum, impedance 10 ohms
Headphone Output (Monitor)
Front Panel. (One) 3.5 mm stereo connector, unbalanced, adjustable output level, +7dbu maximum,
impedance 10 ohms. 100mW, 32ohms
Controls
Front Panel Power, Test Tone on/off, Channel up/down, Input Levels, Mix Level, Contour, Monitor volume control
Rear Panel
Input 1 Level, (Line, Mic, Mic-Phantom Power), Input 2 level (-10/+10dbu), RF power level (low, mid,
high)
Internal Adjustments Compression ratio for audio processor
Programming Process on/off, Channel lock
Indicators
Input 1, Input 2, Mix Level VU Indicates Input 1, Input 2, and Mix audio levels. 10 segment LED’s (8 green, 2 red)
Processing Indicated by a green LED when on (front panel)
RF Power Indicated on the LCD (low, mid, high)
LCD Display Channel Designation, lock status, RF power level, programming (front panel)
Test Tone Red LED illuminates when test tone is enabled.
Power
Power Supply
In line switching mode supply, Listen part number LA-206
Input: 100-240 VAC, 47-63 Hz
Output: 12 VDC, 1.3A
Output Connector: .02 in (5.0mm) OD, .01 in (2.5 mm) ID, barrel type
Compliance: UL, CUL, PSE, TUV, CB, CE, RoHS
Power Line Cord (detachable)
North America, Type B, (LT-800-863-01)
Asia, UK, Type G, (LT-800-863-02)
Euro Type J, (LT-800-863-03)
Physical
Dimensions (H x W x D) 1.75 x 8.50 x 9.13 in (4.5 x 21.5 x 23 cm)
Color Dark Grey with white silk screening
Unit Weight 2.7 lbs (1.10 kg)
Unit Weight with LA-207-03 Power Supply 2 lbs.14 oz. (1.30 kg)
Shipping Weight 3 lbs. 2oz. (1.42 kg)
Rack Mounting
One rack space height, 1/2 rack space wide. One or two transmitters can be mounted in one rack space.
Optional Rack mount (LA-326) and LA-131 antenna kit for rack mount not included.
Environmental
Temperature - Operation -10C (14F) to +40C (104F)
Temperature - Storage -20C (-4F) to +50C (122F)
Humidity 0 to 95% Relative Humidity, non condensing
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