Williams Sound MOD 232 - Manual

Two Channel Infrar

ed Modulator

•

Model MOD 232

Two Channel Infrared Modulator •

Model MOD 232

©2007, Williams Sound Corp. MCAT 002B

1

NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!

D

D

Description:

The MOD 232 Modulator is designed to operate with a 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 combi-
nation jacks permit balanced/unbalanced line-level inputs. Carrier frequencies are controlled by the
microprocessor and a frequency synthesizer for rock-solid frequency control.

Applications:

• Churches • Schools • Auditoriums • Conference Rooms • Theaters

Size, Weight:

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)

Color:

Black epoxy paint with white legends

Rack Mount:

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

Power Supply:

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

Modulation:

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

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 to 4:1
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 to 4:1

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:

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

Infrared Test LED:

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

MOD 232 Modulator:

MOD 232 Front Panel:

Two Channel Infrared System Modulator

Williams Sound

Power

Phones

+ 9
+ 6
+ 3
0
- 3
- 6
- 9
- 12
- 15
- 18

+ 9
+ 6
+ 3
0
- 3
- 6
- 9
- 12
- 15
- 18

3.8

3.3

2.8

2.3

Level

5

0

1

2

3

4

6

7

8

9

10

Level

5

0

1

2

3

4

6

7

8

9

10

Compress

3.8

3.3

2.8

2.3

Compress

Inputs Mixed

Stereo

IR

CH A

CH B

Frequency

(MHz)

Frequency

(MHz)

Channel A

Channel B

Microprocessor Controlled

Frequency Synthesized