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Specications
LT-800 Specications
Architectural Specications
The stationary FM transmitter shall be capable of broadcasting on 57 channels. The transmitter
shall have a SNR of 80dB or greater. The output power shall be adjustable to quarter, half or
full. Channel tuning shall be capable of being locked. The device shall broadcast on both wide
and narrow band channels. The device shall have an audio frequency response of 63 Hz to
15k Hz, ± 3dB at 72 MHz, or of 63 Hz to 10k Hz, ± 3dB at 216 MHz. It shall have two mixing audio
inputs. The device shall have the following audio controls: input level, mix level and an
adjustable low pass filter. The device shall have an audio processor that is capable of
automatic gain control and limiting. The Listen LT-800 is specified.
Specification
Specications LT-800-072 LT-800-216
RF
RF Frequency Range 72.025 - 75.950 MHz 216.025 - 216.9875 MHz
Number of Channels 17 wide band, 40 narrow band 19 wide band, 38 narrow band
Frequency Accuracy +/-.005% stability 32˚ to 122˚F (0˚- 50˚C)
Transmitter Stability 50 PPM
Output Power 80,000uV at 3 m 100mW (max allowed by FCC)
Antenna Various Antennas available
Antenna Connector BNC
Compliance FCC Part 15, Industry Canada FCC Part 90, Industry Canada
** All system specications are wireless end-to-end
Audio
System Frequency Response 50 Hz - 15 kHz (±3 dB) 50 Hz - 10 kHz (±3 dB)
System Signal to Noise Ratio
(A-Weighted)
80 dB SQ enabled; 60 dB SQ disabled 80 dB SQ enabled; 50 dB SQ disabled
System Distortion <2% total harmonic distortion (THD) at 80% deviation
Audio Input 1
Rear panel. (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 Ohms (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/off. 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,
+19 dBu maximum, impedance 10 ohm.
Headphone Output (Monitor) Front panel. One (1) 3.5 mm stereo connector, unbalanced, adjustable output level, +7 maximum, impedance 10 Ohm.
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/+10 dBu), RF Power (low, mid, high)
Internal Adjustments Compression ratio for audio processor
Programming SQ on/off, Processing on/off. Channel lock
Indicators
Input 1 and Input 2, Mix VU Indicates Input 1, Input 2 and Mix audio levels. 10 segment LED’s (8 green, 2 red)
SQ and 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 enabled
Power
Power Supply Type 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: .02 in. (5.0 mm) OD, .01 in. (2.5 mm) ID, barrel type
Power Supply Compliance UL, CE, GS, TUV
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 2.6 lbs. (5.7 kg)
Unit Weight with LA-201 4.4 lbs. (2.0 kg)
Power Supply
Shipping Weight 5.0 lbs. (2.26 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
Specications are subject to change without notication