Williams Sound MOD 232-02 stationary infrared modulator

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This easy to operate and maintain 2-channel infrared modulator can be easily incorporated into a standard 19” rack, and the user friendly controls and features provide peace of mind both during and following installation.


Free shipping on all orders £150 and over

01686 628012

General Description

The Williams Sound MOD 232-02 is an infrared modulator that is microprocessor-controlled and handles two audio channels .Baseband outputs can daisy-chain two MOD 232 together for four-channel operation, and combination jack inputs provide balanced/unbalanced line-level inputs.
Carrier frequencies are controlled by the microprocessor and a frequency synthesizer.

The MOD 232-02 modulator is ideal for audio description, hearing assistance or simultaneous interpretation.


Secure wireless communication
User friendly and simple setup
Switchable 2.3, 2.8, 3.3, 3.8 MHz
Adjustable volume control
Mic and line inputs
Easy to install and use

Delivery Includes

1 MOD 232-02 Stationary infrared modulator

Technical Data

Power Supply: Wall Transformer 24 V AC 50-60 Hz 15VA
Modulation: FM Wideband +50 kHz
Carrier Frequency: Channel A: Selectable 2.3, 2.8, 3.3, 3.8 MHz Channel B: Selectable 2.3, 2.8, 3.3, 3.8 MHz
Signal-to-Noise Ratio: More than 60dB
Frequency Response: 30 to 16,000 Hz +1 dB -3 dB electrical response
Total Harmonic Distortion: Less than 2% electrical response
Audio Processing: Compression (slope) adjustable from 1:1 or 2:1
Switchable compression gain: Moderate: 16dB Max: 33dB
Auto Carrier Shut-Off: 15-minute timer shuts off carrier when no audio is present (can be disabled)
Power Switch: Two-position push button ON/OFF
Power Indicator: Green LED
Audio Level Controls: CHA and CHB input level rotary knobs
Audio Indicators: CHA and CHB audio level 10-segment LED’s
Carrier LEDs: 4 green LED carrier “on” indicators per channel (indicates frequency, malfunctions)
Compress Control: 1:1 or 2:1
Input Mix LED: Indicates inputs A and B audio are mixed and transmitted by CHA and CHB off
Stereo LED: Indicates stereo mode
Phones Switch: Selects CH1 or CH2 for phones when not in stereo mode
Phones Output: 6.35mm TRS headphone jack accepts stereo, mono and any impedance phones
Infrared Test LED: IR LED for receiver testing, monitoring and audio signal testing
Power Input: 3-Pin Molex 24 V AC 50-60 Hz 15 VA
Audio Input Jack: CHA and CHB combination XLR/TRS jack
Mic Level: Balanced Lo-Z 100 µV min. to 90 mV max. 1 mV nominal 3kΩ input impedance supplies switchable simplex power per DIN 45596 for condenser mics
Line Level: Balanced or unbalanced 21 mV min. to 10V max 212 mV nominal 100 kΩ
Audio Line Output Jacks: RCA Jack CHA and CHB 500 mV unbalanced 100 Ω source impedance load impedance must be greater than1 kΩ
Configuration Switches: CHA and CHB 8-position DIP switch selects Mic/Line input, compressor gain, simplex power, discrete or mixed inputs, carrier frequency, channel disable, auto shut-off timer
Baseband Input Jack: BNC allows mixing with additional MOD 232 Modulator (4CH operation) 100 mV 50 Ω input impedance, use with MOD 232 or MOD 112 (111) BNC RG-58 Cable
Baseband Output Jack: Two BNC jacks carry baseband signal 100 mV/channel 50 Ω source impedance for use with WIR TX9 or MOD 232 only
Dimensions (W x D x H): 21.5 x 20.8 x 4.4cm
Weight: 1.5kg
Colour: Black epoxy

More Information
ManufacturerWilliams Sound

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