Williams Sound MOD 232 User Manual

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MOD 232

Two-channel Infrared Modulator

The MOD 232 Modulator is designed to operate with the TX9
emitter operating on 2.3/2.8/3.3/3.8 MHz frequency. Each
microprocessor controlled MOD 232 modulator can handle up to
two audio channels. Baseband outputs can daisy-chain two MOD
232 together for four-channel operation. Flexible combination jacks
permit balanced/unbalanced line-level inputs. Carrier frequencies
are controlled by the microprocessor and a frequency synthesizer
for stable frequency control.

INFRARED SPECIFICATION DATA

2 Channel Infrared System Modulator

channel A

microprocessor controlled frequency synthesized

Power

Level

Phones

Ch A

Ch B

Compress

Frequency

(MHz)

1:1 2:1

3.8

3.3

2.8

2.3

9
6
3
0
3
6

9
12
15
18

+
+
+

-

-

-

-

-

-

channel B

Level

Inputs Mixed

Stereo

IR

Compress

Frequency

(MHz)

1:1 2:1

3.8

3.3

2.8

2.3

9
6
3
0
3
6

9
12
15
18

+
+
+

-

-

-

-

-

-

Two-channel Infrared Modulator

MOD 232 Modulator:

Size, Weight:

Color:

Rack Mount:

Power Supply:

Modulation:

Carrier Frequency:

Signal-to-Noise Ratio:

Frequency Response:

Total Harmonic Distortion:

Audio Processing:

Auto Carrier Shut-Off:

MOD 232 Front Panel:

8.5” W x 8.2” D x 1.7” H (21.5 cm x 20.8 cm x 4.4 cm), 3.1 lbs (1.5 kg)

Black epoxy paint with white legends

1/2 rack space wide, 1 rack space high, one or two modulators may be mounted in a single IEC rack space with RPK 005 (single) or
RPK 006 (double) Rack Mount Kits

Wall Transformer, 24 VAC, 50-60 Hz, 15VA

North America: TFP 016, UL/CSA

Europe: TFP 027-01, 2-pin Schuko plug, CE

UK: TFP 027-02, 3-pin UK plug, CE

FM Wideband, +50 kHz deviation, 50 uS pre-emphasis

Channel A: Selectable, 2.3/2.8/3.3/3.8 MHz,

Channel B: Selectable, 2.3/2.8/3.3/3.8 MHz

More than 60dB

30 to 16,000 Hz, +1 dB, -3 dB, electrical response

Less than 2%, electrical response

Compression (slope) adjustable from 1:1 or 2:1

Switchable compression gain: Moderate: 16dB. Max: 33dB

15-minute timer shuts off carrier when no audio is present (can be disabled)

Power Indicator:

Audio Level Controls:

Audio Indicators:

Compress Control:

Infrared Test LED:

Power Switch:

Carrier LEDs:

Input Mix LED:

Stereo LED:

Phones Switch:

Phones Output:

Two-position push button, ON/OFF

Green LED

CHA and CHB Input Level, rotary knobs

CHA and CHB Audio Level, 10-segment LED’s

4 green LED carrier “on” indicators per channel (indicates frequency, malfunctions)

1:1 or 2:1

Indicates inputs A and B audio are mixed and transmitted by CHA and CHB off

Indicates stereo mode

Selects CH1 or CH2 for phones when not in stereo mode

1/4” TRS headphone jack. Accepts stereo, mono and any impedance phones.

IR LED for receiver testing, monitoring and audio signal testing.

NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

Two-channel Infrared Modulator

MOD 232 Rear Panel:

Power Input:

Audio Input Jack:

Mic Level:

Line Level:

Audio Line Output Jacks:

Conguration Switches:

Baseband Input Jack:

Baseband Output Jack:

Approvals:

Operating Requirements:

Warranty:

NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

3-Pin Molex, 24 VAC, 50-60 Hz, 15 VA

CHA and CHB combination XLR/TRS jack

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

Balanced or unbalanced, 21 mV min. to 10V max., 212 mV nominal, 100 kΩ

RCA Jack, CHA and CHB, 500 mV, unbalanced, 100 Ω source impedance, load impedance must be greater than1 kΩ

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

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

Two BNC jacks carry baseband signal, 100 mV/channel, 50 Ω source impedance, for use with WIR TX9 or MOD 232 only

CE, FCC, RoHS, WEEE

0-50º C ambient temperature, non-condensing, non-corrosive atmosphere

5 years on modulator*

Bid Specs:

The infrared system shall consist of separate modulator and emitter
units, with portable receivers. The modulator unit shall be a half-rack
style, metal enclosure. A rack panel shall be available to mount one
or two modulator units within a single EIA rack space. An adjustable
oor stand and mounting bracket shall be available to mount the
modulator and emitter together for portable operation.

The modulator shall provide two channels of selectable FM carrier
signals, 2.3/2.8/3.3/3.8 MHz, so that a single modulator can be
used to simultaneously transmit up to two channels, and two
modulators can be ganged together to transmit up to four channels
simultaneously. The carrier signals shall use 50 kHz deviation
and 50 µS pre-emphasis. The carrier signals (baseband) shall be
transmitted to one or more emitters by 50 ohm RG58 coaxial cable
with BNC-type connectors. A BNC–type baseband input jack and
baseband output jack shall be provided on the modulator. The
modulator shall be powered by an external 24 VAC, 10 VA,
50-60 Hz power supply, connected via a three-pin Molex power
connector.

*90 DAYS ON ACCESSORIES.

It shall have a rocker-type power switch, power LED indicator, four
carrier indicator LEDs and two bar graph-type LED audio indicators.
The modulator shall have a modulated IR LED on the front panel
for testing purposes, and a headphone jack that accommodates
mono and stereo 1/4” headphones, and channel monitoring
switch. The modulator shall have two rotary audio input level
controls, and a screwdriver adjustable control for varying the input
compression from 1:1 or 2:1. The modulator shall have two timers
that automatically shut off the carriers when there is no audio signal
present for 15 minutes. The modulator shall have two combination
input jacks that accept 3-pin XLR plugs for balanced microphone
input or 1/4” TRS plugs for balanced or unbalanced line-level inputs.
The XLR inputs shall be low impedance, accept signal levels from
100 µV to 90 mV and supply 15 V simplex power per DIN45596.
The TRS jacks shall accept balanced or unbalanced audio signal
levels from 21 mV to 10 V. The modulator shall have CE, FCC,
RoHS, and WEEE approval and carry a ve-year parts and labor
warranty.*

The modulator shall be the Williams Sound model MOD 232.

Domestic Sales

Williams Sound
10300 Valley View Rd
Eden Prairie, MN 55344
Ph: 800-328-6190 / 952-943-2252
FAX: [phone]
Email: [e-mail]
Web: www.williamssound.com

International Sales

International Sales Department
Williams Sound
10300 Valley View Rd
Eden Prairie, MN 55344 USA
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.williamssound.com

800.843.3544 / [e-mail] / www.williamssound.com

© 2011, Williams Sound, LLC MCAT 002E