Two Channel Infrared Modulator
•
Model MOD 232
ꢀ
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
MOD 232 Modulator:
Size, Weight:
Color:
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
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
Wall Transformer, 24 VAC, 50-60 Hz, 15VA
Power Supply:
North America:
Europe:
UK:
TFP 016, UL/CSA
TFP 027-01, 2-pin Schuko plug, CE
TFP 027-02, 3-pin UK plug, CE
Modulation:
Carrier Frequency:
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
Signal-to-Noise Ratio:
Frequency Response:
Total Harmonic Distortion:
Audio Processing:
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 to 4:1
Switchable compression gain: Moderate: 16dB. Max: 33dB
15-minute timer shuts off carrier when no audio is present (can be disabled)
Auto Carrier Shut-Off:
Two Channel Infrared System Modulator
Microprocessor Controlled
Williams Sound
MOD 232 Front Panel:
+9
+9
+6
+3
0
Inputs Mixed
3.8
3.8
3.3
2.8
2.3
Frequency Synthesized
+6
+3
0
5
5
Phones
3.3
2.8
2.3
4
6
4
6
Compress
Compress
7
8
9
7
8
9
Stereo
IR
3
2
1
3
2
1
- 3
-6
- 3
-6
Power
-9
-9
CH A
CH B
-12
-15
-18
-12
-15
-18
Frequency
(MHz)
Frequency
(MHz)
0
10
0
10
Level
Level
Channel A
Channel B
Power Switch:
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 to 4:1
Power Indicator:
Audio Level Controls:
Audio Indicators:
Carrier LEDs:
Compress Control:
Input Mix LED:
Stereo LED:
Indicates inputs A and B audio are mixed and transmitted by CHA and CHB off
Indicates stereo mode
Phones Switch:
Phones Output:
Infrared Test LED:
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!
©2007, Williams Sound Corp. MCAT 002B
1
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Two Channel Infrared Modulator
•
Model MOD 232
ꢀ
D
D
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 floor 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.
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 screw-
driver adjustable control for varying the input compression from 1:1 to 4:1. 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 micro-
phone 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 five-year parts and labor warranty.*
The modulator shall be the Williams Sound Corp. model MOD 232.
*90 days on accessories.
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2007, Williams Sound Corp. MCAT 002B
3
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Two Channel Infrared Modulator
•
Model MOD 232
ꢀ
D
D
Contact:
United States
Williams Sound Corp.
10321 W. 70th Street
Eden Prairie, MN 55344
Phone: 800-328-6190 or 952-943-2252
Fax: 952-943-2174
Email: [email protected]
Canada
Thorvin Electronics
2861 Sherwood Heights Dr. Units 36-37
Oakville, ON L6J-7K1 Canada
Phone: 800-323-6634 or 905-829-3040
Fax: 905-829-4196
South America
DPTech
SIA Trecho 3/4 Lote 335 2°. Andar
71200-030 Brasília, DF
BRAZIL
Phone: (5561) 361-1384
Fax: (5561) 361-0948
Email: [email protected]
United Kingdom
Sound Associates
Keeble House, 81 Island Farm Road
West Molesey, Surrey KT 2SA
United Kingdom
Phone: (44) 020 8939 5900
Fax: (44) 020 8939 5901
Email: [email protected]
Asia, Europe, Latin America, Mexico
International Sales Department
Williams Sound Corp.
10321 W. 70th Street
Eden Prairie, MN 55344 USA
Phone: +1 952 224 7791
Fax: +1 952 943 2174
Email: [email protected]
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2007, Williams Sound Corp. MCAT 002B
4
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