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Includes:
LT-803-072 Stationary 3-Channel FM Transmitter (72 MHz)
Power Supply
Quick Reference Card
Limited Lifetime Warranty Program Card
architectural specifications:
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 filter (contour). The device shall have an audio processor that is capable of automatic gain control and limiting. The Listen LT-803-072 is specified.
| Specification | 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 122º (0 to 50ºC) | |
| Transmitter Stability | 50 PPM | |
| Transmission Range | Up to 1,500 ft. (457.20 m) | |
| Output Power | 80,000 uV at 3 m | |
| Antenna | Various antennas available | |
| Antenna Connector | BNC | |
| Compliance | FCC Part 15, Part 90, Industry Canada | |
| Audio | -- All system specifications are wireless end-to-end | |
| 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 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 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 ohm | |
| 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, +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/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 level (low, mid, high) | |
| Internal Adjustments | Compression ratio for audio processor | |
| Programming | Process on/off, channel lock | |
| Indicators | Input1, 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 (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 the 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, TÜV, RoHS | |
| 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. (1.2 kg) | |
| Unit Weight with LA-207-03 Power Supply | 4.5 lbs. (2.0 kg) | |
| Shipping Weight | 6.0 lbs. (2.7 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 ºC (14 ºF) to +40 ºC (104 ºF) |
| Temperature - Storage | -20 ºC (-4 ºF) to +50 ºC (122 ºF) | |
| Humidity | 0 to 95% relative humidity, non condensing | |
