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LS-81-SIR
Includes:
(1) LT-82 Stationary IR Transmitter
(1) LA-326 Universal Rack Mounting Kit
(2) LA-140 Stationary IR Radiator - Grey
(4) LR-42 Stationary IR Stetho Receivers
(4) LA-363 High Capacity AAA Alkaline Batteries (Pkg. of 2)
(1) LA-351 IR 8-Unit Storage Station
(1) LA-304 ADA Compliance Signage Kit
System Manual
Architectural Specifications:
The LS-81-SIR Performance Stationary IR System shall use infrared (IR) light to transmit audio from IR emitting radiators to portable IR receivers. The system shall use IR modulating frequencies above 2.0 MHz. The system transmitter shall have a timer that shuts off the carriers after 30 minutes when no audio is present at the transmitter. Channel selection shall be capable of being locked. The system shall be capable of transmitting on four carriers and each of the four carriers shall be capable of transmitting a mono or stereo signal. The system shall have a frequency response of 100 to 15 KHz (+/-3 dB), less than 2% distortion and shall have signal to ratio of greater than 58 dB. A single emitting radiator shall have a transmitting area of no less than 10,000 square feet (one carrier) or greater for each radiator specified. The radiator shall be powered via CAT-5 cabling and the RF from the transmitter shall be carried by 50 ohm coaxial cable.
(1) LT-82 Stationary IR Transmitter
(1) LA-326 Universal Rack Mounting Kit
(2) LA-140 Stationary IR Radiator - Grey
(4) LR-42 Stationary IR Stetho Receivers
(4) LA-363 High Capacity AAA Alkaline Batteries (Pkg. of 2)
(1) LA-351 IR 8-Unit Storage Station
(1) LA-304 ADA Compliance Signage Kit
System Manual
Architectural Specifications:
The LS-81-SIR Performance Stationary IR System shall use infrared (IR) light to transmit audio from IR emitting radiators to portable IR receivers. The system shall use IR modulating frequencies above 2.0 MHz. The system transmitter shall have a timer that shuts off the carriers after 30 minutes when no audio is present at the transmitter. Channel selection shall be capable of being locked. The system shall be capable of transmitting on four carriers and each of the four carriers shall be capable of transmitting a mono or stereo signal. The system shall have a frequency response of 100 to 15 KHz (+/-3 dB), less than 2% distortion and shall have signal to ratio of greater than 58 dB. A single emitting radiator shall have a transmitting area of no less than 10,000 square feet (one carrier) or greater for each radiator specified. The radiator shall be powered via CAT-5 cabling and the RF from the transmitter shall be carried by 50 ohm coaxial cable.
| Specification | LR-42 Stethoscope Receiver | |
| RF | Frequency Range | 2.3 MHz - 3.8 Mhz |
| Number of Channels | 4 selectable channels | |
| IR Detectors | 2 detectors under front IR lens | |
| Sensitivity | 1 nW/cm2 at 40 db SNR | |
| Frequency Accuracy | +/- .005% stability 0 to 50C | |
| Squelch | Automatic on loss of RF signal (40 db SNR) | |
| Compliance | FCC Part 15, Industry Canada, CE | |
| Audio | -- All system specifications are wireless end-to-end | |
| System Frequency Response | 63Hz - 15kHz (+/- 3dB) | |
| System Signal to Noise Ratio (A-weighted) | > 58dB | |
| System Distortion | < 2% total harmonic distortion (THD) | |
| Audio Output Jacks | None. Built in Stethoscope speakers | |
| Audio Output Power | 20 mW maximum at 32 ohms | |
| Controls | User Controls | Volume, Power, Channel Select |
| Programming | Channel Lock, Auto Find, Auto Seek, Auto Shut-Off, Audible Option | |
| Indicators | Unit Power | Indicated by current channel selection LED |
| Channel Selection | Red LED illuminates on the current channel selection | |
| Audible Indicator | Audio beep in headset indicates low batteries, channel lock, power on/off. Can be disabled in programming mode. Default: On |
|
| Power | Battery Type | Two AAA alkaline batteries or NiMH battery pack |
| Battery Life | 30 hours alkaline, 15 hours NiMH rechargeable pack (LA-364) | |
| Battery Charging | Fully Automatic with NiMH battery pack and LA-350 charger | |
| Physical | Dimensions (W x D x H) | 1.8 x 4 x .75 inches (46 x 102 x 19 mm) Stethoscope Arm length 8 inches (203 mm) |
| Color | Dark Grey with White Silk Screening | |
| Unit Weight without batteries | 1.75 ounces (49 grams) | |
| Unit Weight with batteries | 2.95 ounces (85 grams) | |
| Shipping Weight | 8 ounces (227 grams) | |
| Environmental | Temperature - Operation | -10 C (14 F) to +40 (104 F) |
| Temperature - Storage | -20 C (-4 F) to +50 (122 F) | |
| Humidity | 0 to 95% relative humidity, non-condensing | |
 |
| 1. Power: Press to turn on the unit, press and hold turn the unit off |
| 2. SEL: Press to change channels |
| 3. Indicates operating channel 1 through 4 |
| 4. Indicates status of the batteries when the Power button is pressed momentarily |
| 5. Removable battery compartment (AAA alkaline batteries or NiMH rechargeable battery pack) |
| Specification | LT-82 Stationary IR Transmitter | |
| RF | Carrier Frequencies | Selectable: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz |
| Number of Channels | 4 channels. Selectable 1 channel per transmitter (mono or stereo) | |
| Carrier Shut Off | Carrier will shut off when no audio is present for 30 minutes to preserve radiator life. | |
| Frequency Accuracy | +/- .005% stability 0 to 50C | |
| Transmitter Stability | 50 PPM | |
| RF Output | (2) BNC connectors, for connection to radiator(s) and/or additional transmitter(s). 50 mV, 50 ohm, -10 dBm |
|
| RF Input | (1) BNC connector, for connection from additional transmitter(s). 50 mV, 50 ohm, -10 dBm |
|
| Compliance | FCC Part 15, Industry Canada, CE | |
| Audio | ** All system specifications are wireless end-to-end | |
| System Frequency Response | 63Hz - 15kHz (+/- 3dB) | |
| System Signal to Noise Ratio (A-weighted) | > 58dB | |
| System Distortion | < 2% total harmonic distortion (THD) | |
| Audio Input 1 | Mono Input (Rear Panel). Female-XLR and 1/4 in combo connector, balanced, 0/- 55dBu (line/mic) nominal input level adjustable; -30/+21dBu (mic/line) maximum input level; impedance 20k/1k ohms (line/mic); phantom power +12VDC |
|
| Audio Input 2 | Stereo or Mono Input (Rear Panel). (2) Phono connectors, unbalanced, -10/+10dBu nominal input level adjustable, +30dBu maximum, impedance 100k ohms |
|
| Audio Processing | Compression can be turned on/off. | |
| Contour | Cuts and boosts frequencies above 5 kHz | |
| Combined Audio Output (Mix) | Input 1 and Input 2 Mixed Output (Rear panel). (2) Phono connectors, unbalanced, -10dBu -- nominal output level, +19dBu maximum, impedance 10 ohms. |
|
| Headphone Output (Monitor) | Front panel. (1) 3.5mm connector, unbalanced, adjustable output level, +7dBu maxi- mum impedance 10 ohms. 100mW, 32 ohms, 3.5mm stereo. |
|
| Controls | Front Panel | Power, Test Tone on/off, Channel up/down, Input Level, Transmit Level, Contour, Headset Level |
| Rear Panel | Input 1 Level (Line, Mic, Mic-Phantom Power), Input 2 Level (-10/+10 dBu) |
|
| Internal Adjustments | Compression ratio for audio processor. Slope adjustable from 1:1 to 4:1. Default 2:1 |
|
| Programming | Stereo on/off, Processing on/off | |
| Indicators | Unit Power | Red LED illuminates when the unit is powered up (front panel) |
| Input 1, Input 2, Transmit Level | Indicates Input 1, Input 2, and Transmit audio levels. 10 segment LED’s (8 Green, 2 red) | |
| Stereo | Indicated by a green LED when on (front panel) | |
| Processing | Indicated by a green LED when on (front panel) | |
| RF Power | Indicates carrier is active on the LCD Display (front panel) | |
| LCD | Channel designation, lock status, RF Power, programming (front panel) | |
| Test Tone | Red LED illuminates when test tone enabled (front panel) | |
| Power | Power Supply | In-line switching mode power supply, Listen part number LA-205 |
| Input: 100-240 VAC, 47-63 hz | ||
| Output: 30 VDC, 1.5 A | ||
| Output Connector: RJ-45 | ||
| Compliance: UL and CE Listed | ||
| Power Output: | (2) RJ-45 jacks. For remote powering up to 2 radiators. | |
| Physical | Dimensions (W x D x H) | 8.5 x 9.125 x 1.75 in (21.5 x 23 x 4.5 cm) |
| Color | Dark Grey with White Silk Screening | |
| Unit Weight | 2.6 lbs (5.7 kg) | |
| Unit Weight with LA-205 Power Supply | 3.8 lbs (8.3 kg) | |
| Shipping Weight | 4.4 lbs (9.7 kg) | |
| Rack Mounting | 1 rack space height, 1/2 rack space wide. One or two transmitters can be mounted in 1 rack space. Optional rack mount (LA-326) not included. |
|
| Environmental | Temperature - Operation | -10 C (14 F) to +40 (104 F) |
| Temperature - Storage | -20 C (-4 F) to +50 (122 F) | |
| Humidity | 0 to 95% relative humidity, non-condensing | |
 |
| 1. POWER on/off |
| 2. Controls input levels of inputs 1 and 2. Dual VU meters indicate input level. |
| 3. Mix level control sets level of the mixed (or transmitted) audio. VU meter shows the output level of your mixed audio. |
| 4. Contour equalization cuts/boosts frequencies above 5 kHz. |
| 5. Processing (automatic gain control) can be turned on and off from the front panel. |
| 6. Stereo indicator. When illuminated, indicates the unit is in stereo mode. Mode can be turned on and off from the front panel. |
| 7. LCD shows channel selected, lock status, programming and carrier on. |
| 8. Earphone jack and volume control to check audio integrity of transmission source. |
| 9. UP/DOWN channel selection of up to four channels or carrier can be turned off. |
| 10. Test tone provides flexibility when setting up and testing your system. |
| 11. "RF Input" provides RF connection from other LT-82 units for multiple carrier interconnections. "RF Output" provides RF connection to LA-140 radiators |
| 12. In-line Universal Power Supply included (be sure to order the appropriate configuration (power cord) for your country). Power supply has enough power for the LT-82 and up to two radiators. "Power Input" is from the power supply, "Power Output" is to radiators. |
| 13. Two phono connectors for a mixed output of Inputs 1 and 2. |
| 14. Two unbalanced phono stereo audio inputs. Select either +10 dBu or -10 dBu input level. |
| Specification | LA-140 Radiator | |
| RF | Frequency Range | 1 MHz - 5 MHz |
| Input | BNC Connection. -25dbm to -5dbm input nominal | |
| Output | BNC Connection. -15 dBu nominal | |
| Compliance | FCC Part 15, Industry Canada, CE | |
| Coverage Area | 10,000 sf (929 sm) when used with Listen Receivers | |
| Controls | User Controls | Termination Switch, Delay Compensation Switch, Indicator LEDs on/off |
| Indicators | Red LED | Front panel LED indicates power is present when illuminated |
| Yellow LED | Indicates carrier is detected. | |
| Green LED | Indicates carrier and power is present and radiator is emitting IR signal. | |
| Power | Input | RJ-45 connector. 30VDC, powered from transmitter via CAT-5 cable or optional LA-205 power supply. |
| Output | RJ-45 connector. 30VDC, powers up to one additional radiator. (Maximum 2 radiators powered from each LT-82 transmitter or LA-205 power supply) | |
| Emitter Power | 3 Watts | |
| Physical | Dimensions (W x D x H) | 8 x 5.5 x 2.6 inches (203 x 140 x 66 mm) |
| Color | LA-140-GY (Grey), LA-140-WH (White) | |
| Unit Weight | 2.1 lbs (.95 kg) | |
| Unit Weight with Wall/ Ceiling Mounting hardware | 2.35 lbs (1.05 kg) | |
| Shipping Weight | 4 lbs (1.8 kg) | |
| Environmental | Temperature - Operation | -10 C (14 F) to +40 (104 F) |
| Temperature - Storage | -20 C (-4 F) to +50 (122 F) | |
| Humidity | 0 to 95% relative humidity, non-condensing |
 |
| 1. RF input connector - this is the connection from the LT-82 transmitter or from the output of another radiator. |
| 2. RF output connector - use this to send the RF input to another radiator. |
| 3. Delay compensation - allows you to set different delays so all radiators have the same timing. This prevents drop-outs caused by signals out of phase. |
| 4. LED illumination switch - use this to turn on/off the illumination of the front panel LEDs |
| 5. Termination switch - use to terminate the coaxial cable |
| 6. Power connection from LT-82 transmitter or optional power supply (LA-205) |
| 7. Power connection to (optional) second radiator. |
| 8. LEDs - three LEDs that indicate power, carrier present and cable fault. |
| 9. Color – two different colors. Available in Grey (LA-140-GY) or White (LA-140-WH). Mounting brackets and supplied cables match the radiator. |
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