The ListenIR Transmitter/Radiator Combo from Listen Technologies is a transmitter/radiator with up to four frequencies, including 2.3 MHz, 2.8 MHz, 3.3 MHz, or 3.8 MHz. It has expansion radiators that implement delay compensation, providing no signal cancellation drop outs.

Features

Selectable 2.3, 2.8, 3.3, or 3.8 MHz frequencies
Flexible input connectivity of mic, RCA stereo sum, and Phoenix line level summed on each input channel

Includes

Listen Technologies ListenIR Transmitter/Radiator Combo
2 x Phoenix Type Connectors

Specifications

Audio

Frequency Response	20 Hz to 20 kHz (+/-1 dB) Line Input: 63 Hz to 15 kHz (+/-3 dB)
Signal to Noise Ratio	>70 dB (SNR) Line Input: >60 dB
Total Harmonic Distortion	<0.1% Line Input: <2%
Input	Balanced Line: mono input 2 x phoenix type connectors, +4 dBu nominal input, +14 dB headroom, impedance 100 kOhms Unbalanced: stereo/mono input 2 x dual (RCA) phono connectors, -10 dBu nominal input, +14 dB headroom, impedance 10 kOhms Microphone: 2 x 3.5 mm tip/sleeve connector, -30 dBu nominal input, +14 dB headroom, impedance 4.4 kOhms, 5 VDC bias supply

Controls

Power Switch	3 position switch with Power OFF and ON
Level Control	Knob: 2 x audio taper rotary potentiometer, counter-clockwise decreases input mix level, clockwise increases input mix level
Carrier Frequency	Selection: two 4-position rotary switches (2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz)

Indicators

Power Supply	Green LED on in-line power supply indicates AC power is applied
Audio Level	2 x green LEDs, 2 x red LEDs Green LED indicates audio presence and red LED indicates peaks in the audio
RJ-45	Solid amber LED indicates carrier is present and IR is being transmitted Solid green indicates power is applied to unit, flashing indicates unit has entered power save mode

RF Specification

Frequency Range	216.0125 to 216.9875 MHz
Number of Channels	Two channels, selectable carrier frequency
Frequency Accuracy	±.005% stability 32 to 122°F (0 to 50°C)
Stability	Transmitter: 50 PPM
Output	Expansion Link: 2 x RJ-45 connectors provide RF signal and power, CAT-5e cable 24 AWG, 100' (30.48 m) maximum cable length
Modulation	FM Wideband, ±50 kHz deviation max, 50 μS pre-emphasis
Carrier Frequency	2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz, selectable
Power Save Mode	Carrier will shut off when no audio is present for 15 minutes on both channels to preserve radiator life

IR Interface

Power	1.49 W
Coverage	Depends on receiver

Power

Power Supply	In-line switching mode power supply
Power Supply Input	100-240 VAC, 50-60 Hz
Power Supply Output	12 VDC, 4 A, 48 W
Power Supply Connector	0.01" (2.5 mm) ID barrel connector, center positive
Line Cord	IEC line cord

Environmental

Operating Temperature	14 to 104°F (-10 to 40°C)
Storage Temperature	-4 to 122°F (-20 to 50°C)
Humidity (Non-condensing)	0 to 95% relative humidity

Physical

Color	Black with white silk screening
Dimensions	1.5 x 10.7 x 4.1" (3.81 x 27.2 x 10.5 cm)
Weight	Unit: 0.8 lbs. (0.4 kg) Unit with Power Supply: 1.8 lbs. (0.8 kg)

Compliance and Approvals

Power Supply	CUL, UL, CE, CCC, C-Tick, KC, PSE, GS, FCC, RoHS
Standards	FCC part 15, ICS-03, CE, UL, CUL, C-Tick, CCC, PSE, KC, GS, RoHS, WEEE

Other Details

Listen Technologies products are designed and engineered to provide longstanding use for many years. Listen Technologies warrants all products against defects in materials and workmanship. All product warranties can be transferred, in the event product is transferred the warranty is valid from the original date of the product purchase. Listen shall bear no responsibility or obligation with respect to the manner of use of any equipment sold. Listen specifically disclaims and negates any warranty of merchant-ability or fitness of use of such equipment including, without limitation, any warranty that the use of such equipment for any purpose will comply with applicable laws and regulations. The terms of the warranty are governed by the laws of the state of Utah, USA. Warranty does not include normal wear and tear on the product. In addition, Listen Technologies is not liable for consequential damages due to any failure of equipment to perform as intended. Listen stands by the quality of its manufactured products and will, at its own discretion, repair or replace any defective products. All product warranties are subject to change without notice. For all warranty related inquires and information please contact support at support@listentech.com.

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Listen Technologies LT-84-01 ListenIR Transmitter/Radiator Combo

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