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.
- 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
In the Box
Listen Technologies ListenIR Transmitter/Radiator Combo
| 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 ?S 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 |
| 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 |
| Packaging Info |
| Package Weight | 3.15 lb |
| Box Dimensions (LxWxH) | 13.6 x 10.1 x 3.1" |
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