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LT-800LT-803-072
LT-803-072 Specifi cations
Architectural Specifi cation
The Stationary FM Transmitter shall be capable of broadcasting on one of any three channels – A (72.100 MHz),
E (72.900 MHz) or H (75.900 MHz). The transmitter shall have a SNR of 62 dB or greater. The output power shall be
adjustable to quarter, half or full. Channel tuning shall be capable of being locked. The device shall have an audio
frequency response of 50 Hz to 15k Hz, ± 3 dB at 72 MHz. It shall have two (2) mixing audio inputs. The device shall
have the following audio controls: input level, mix level and an adjustable low pass fi lter (contour). The device shall
have an audio processor that is capable of automatic gain control and limiting. The Listen LT-803-072 is specifi ed.
Speci cations LT-803-072
RF
RF Frequency Range (A) 72.100, (E) 72.900, (H) 75.900
Number of Channels 3 wide band
Frequency Accuracy +/-.005% stability 32˚ to 122˚F (0˚- 50˚C)
Transmitter Stability 50 PPM
Transmittion Range Up to 1,500 ft. (457.20 m)
Output Power 80,000uV at 3 m
Antenna Various antennas available
Antenna Connector BNC
Compliance FCC Part 15, Part 90, Industry Canada
** All system speci cations are wireless end-to-end
Audio
System Frequency Response 50 Hz - 15 kHz (±3 dB)
System Signal to Noise Ratio 62 dB (A-Weighted)
System Distortion <2% total harmonic distortion (THD) at 80% deviation
Audio Input 1
Rear panel, one (1) Female-XLR and ¼ in. combo connector, balanced, 0/-55 dBu (line/mic) nominal input level
adjustable, -30/+21 dBu (line/mic) maximum input level, impedance 20k/1k Ohm (line/mic),
phantom power +12 VDC.
Audio Input 2 Rear panel, two (2) Phono connectors, unbalanced, -10/+10 dBu nominal input level adjustable, +30 dBu maximum, impedance 100k Ohms.
Audio Processing (Process) Compression can be turned on/o . Slope internally adjustable from 1:1 to 4:1. Default 2:1
Contour Cuts and boosts frequencies above 5 kHz
Combined Audio Output (Mix)
Input 1 and input 2, mixed output (rear panel), two (2) phono connectors, unbalanced, -10 dBu nominal output level, +15 dBu maximum,
impedance 10 ohm.
Headphone Output (monitor) Front panel, one (1) 3.5 mm (0.14 in.) stereo connector, unbalanced, adjustable output level, +3 dBu maximum, impedance 10 Ohm.
Controls
Front Panel Power, Test Tone on/o , 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/+10 dBu), RF Power level (low, mid, high)
Internal Adjustments Compression ratio for audio processor
Programming Process on/o . 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 power supply. Listen part number LA-207 (line cord is determined by each country’s AC power standards
Power Supply Input Input: 100-240 VAC, 50-60 Hz. 0.4 A
Power Supply Output Output: 12 VDC, 1.3 A, 15.6 W
Power Supply Connector Output Connector: 0.02 in. (5.0 mm) OD, 0 .01 in. (2.5 mm) ID, barrel type
Power Supply Compliance UL, CE GS, TUV, RoHS
Physical
Dimensions (H x W x D) 8.50 x 1.75 x 9.12 in. (21.6 x 4.45 x 21.16 cm)
Color Dark grey with white silk screening
Unit Weight 2.6 lbs. (1.2 kg)
Unit Weight with LA-207-01 Power
Supply
3.5 lbs. (1.6 kg)
Shipping Weight 4.5 lbs. (2.0 kg)
Rack Mounting
One (1) rack space height, 1/2 rack space wide. One (1) or two (2) transmitters can be mounted in one rack space, optional rack mount
(LA-326)
Environmental
Temperature - Operation -10˚C (14˚F) to +40˚C (104˚F)
Temperature - Storage -20˚C (-4˚F) to +50˚C (122˚F)
Humidity 0 to 95% Relative Humidity, non condensing