Williams Sound SoundPlus Assembly instructions

SoundPlus®
Infrared Listening System
Installation Guide and User Manual
TX9 EMITTER
MOD 232 MODULATOR
MAN 132I

SoundPlus®Infrared Listening System
2
Contents
System Overview.........................................................................................................................................................................3
MOD 232 Modulator Setup.......................................................................................................................................................4
Determine Location .......................................................................................................................................................................... 4
Wiring and Connections................................................................................................................................................................... 4
Power Connection for U.S. Application ....................................................................................................................................... 4
For Applications Outside The U.S. Requiring 240 VAC Mains Supply:............................................................................. 4
Baseband Cable Connection .........................................................................................................................................................5
Audio Connection...............................................................................................................................................................................6
Features and Controls ......................................................................................................................................................................6
Configuration Settings ...................................................................................................................................................................... 7
TX9 Emitter Setup .......................................................................................................................................................................8
TX9 Location and Placement ......................................................................................................................................................... 8
Coverage Area.............................................................................................................................................................................9
Multiple Emitters Installed to Maximize Coverage..................................................................................................................10
Compressor Gain................................................................................................................................................................................11
TX9 Features and Controls ..................................................................................................................................................... 12
Mounting the TX9..............................................................................................................................................................................12
Receiver Safety Information.................................................................................................................................................... 13
Recycling Instructions............................................................................................................................................................... 13
Infrared Receivers ..................................................................................................................................................................... 14
Trouble Shooting ....................................................................................................................................................................... 15
TX9 Indicator Light Is Not On. .......................................................................................................................................................15
Only TX9’s Power Indicator LED Comes On. ...........................................................................................................................15
No Sound Through Receivers.......................................................................................................................................................15
Sound Through The Receivers Is Weak And Noisy. ..............................................................................................................15
Buzzing Or Humming Noise In Sound System. .......................................................................................................................15
SoundPlus®Infrared Listening System Specifications ....................................................................................................... 16
Two-Channel Modulator, Model MOD 232 ...............................................................................................................................16
SoundPlus®Infrared Listening System Specifications ........................................................................................................17
Multi–Channel Infrared Emitter, Model TX9..............................................................................................................................17
Limited Warranty........................................................................................................................................................................ 18

SoundPlus®Infrared Listening System
3
System Overview
The Williams Sound SoundPlus®Infrared Listening System consists of a MOD 232 Modulator(s) and one or more TX9
Emitters which use invisible infrared (IR) light to broadcast speech or music to wireless infrared receivers.
The system is designed to transmit high quality audio for hearing assistance and language translation applications.
Because the system uses infrared light for transmission, it is not aected by interference from radio equipment and
does not interfere with radio equipment. No FCC license or radio approval is required.
The system can be used with microphones as a stand-alone system, or can be connected to other sound equipment.
Infrared systems generally cannot be used in direct sunlight because of sunlight’s large amount of interfering infrared
light.
Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may
cause harmful interference to radio communications. Operation of this equipment in a residential area is likely
to cause harmful interference in which case the user will be required to correct the interference at his own
expense.
NOTICE: A plasma monitor can degrade the audio quality of the SoundPlus®Infrared Listening System.

SoundPlus®Infrared Listening System
4
MOD 232 Modulator Setup
Determine Location
The modulator is usually located with the sound system amplifier or mixer for easy access to an audio input signal.
For portable systems, the modulator can be placed near the emitter or in another convenient location. Infrared Stand
Kit SS-6 is available for portable systems.
Wiring and Connections
Figure 1: MOD 232 (Rear View)
A255
INPUT CH A CH B
ACCEPTS ANY LOW
IMPEDANCE MICROPHONE
OR LINE LEVEL SIGNAL.
BASEBAND OUTPUT
SENDS INDIVIDUAL
AND/OR COMBINED
CARRIER FREQUENCIES
OF 2.3, 2.8, 3.3, 3.8 MHz
TO A TX9 EMITTER.
AUDIO LINE OUTPUT
RCA JACK FOR MONITORING,
RECORDING, OR ROUTING
PROCESSED AUDIO TO
ANOTHER SOUND SYSTEM.
POWER IN
24 VAC, 50-60Hz
120 VAC (US); TFP 016 POWER SUPPLY
230 VAC (CE); TFP 027 POWER SUPPLY
CONFIGURATION SWITCHES
CONTROLS CHANNEL SELECTION,
COMPRESSOR GAIN, MIC/LINE
INPUT, CHANNEL ON/OFF, AND
OTHER CONTROLS.
BASEBAND INPUT
A SECOND MODULATOR
MAY BE CONNECTED
HERE FOR 4 (FOUR)
CHANNEL OPERATION.
WARNING: POWERLINE VOLTAGE MUST NOT FALL BELOW 94V, OR SYSTEM
PERFORMANCE WILL BE GREATLY REDUCED!
Power Connection for U.S. Application
1. Connect the TFP 016 power supply to the 3-pin Molex connector located on the
rear of the MOD 232. (See Figure 2, right.)
For Applications Outside The U.S. Requiring 240 VAC Mains Supply:
Use the transformer power supply, model TFP 027.
Secondary specifications: 24 VAC, 35 VA, 50/60 Hz.
2. Plug the power supply into the AC outlet.
Figure 2: Power Connection
POWER
SUPPLY
A253

SoundPlus®Infrared Listening System
5
Baseband Cable Connection
The MOD 232 can directly drive one or two emitters. TX9 emitters repeat the baseband signal, so any number of
emitters can be used. The modulator outputs CANNOT be split with CATV splitters.
Determine the length of RG-58 cable needed to reach from the TX9 Emitter to the Modulator unit. Install BNC
connectors to each end of the cable.
For two-channel operation, only one MOD 232 is required: Connect the coaxial cable to one of the Baseband Output
jacks on the rear of the MOD 232. The other end of the coaxial cable connects to the Baseband Input jack of the TX9
Emitter. See Figure 3 below.
Figure 3: Baseband Connection, Two Channel Operation
MOD 232 MODULATOR (REAR)
SECOND WIR TX9 EMITTER (OPTIONAL)
TX9 BASEBAND INPUT TX9 BASEBAND INPUT
BASEBAND
OUTPUT
BASEBAND
OUTPUT
A248
Power On Baseband On
Multi-Channel Infrared Transmitter
Made in U.S.A.
24 VACNC
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: TOREDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
Power In:
24VAC
50-60Hz
35VA
Power Supply Wiring:
Baseband Signal Wiring:
Baseband Signal Wiring:
Note: It is normal for this unit to feel warm while it is in operation.
Plug
Use NEC, Class 2 Wiring, 18 ga. minimum,
200 ft. (70m) maximum length (18 ga.)
Use 50 Ohm Coaxial Cable (RG58)
Use RG58 Coax,1000 ft. (350m) max. length
www.williamssound.com
InOut Out
50 Ohms
Baseband
(Modulation)
~
Mounting
Bracket
RoHS
Class 1
LED Product
Williams Sound, Minneapolis, Minnesota, USA
Patent Pending
WIR TX9 EMITTER (REAR)
Power On Baseband On
Multi-Channel Infrared Transmitter
Made in U.S.A.
24 VACNC
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: TOREDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
Power In:
24VAC
50-60Hz
35VA
Power Supply Wiring:
Baseband Signal Wiring:
Baseband Signal Wiring:
Note: It is normal for this unit to feel warm while it is in operation.
Plug
Use NEC, Class 2 Wiring, 18 ga. minimum,
200 ft. (70m) maximum length (18 ga.)
Use 50 Ohm Coaxial Cable (RG58)
Use RG58 Coax,1000 ft. (350m) max. length
www.williamssound.com
InOut Out
50 Ohms
Baseband
(Modulation)
~
Mounting
Bracket
RoHS
Class 1
LED Product
Williams Sound, Minneapolis, Minnesota, USA
Patent Pending
Connect to the TX9 using RG-58 cable and BNC connectors. The MOD 232 has two baseband output jacks to
simplify connections when multiple emitters are used.
To setup a system for four-channel operation, two MOD 232 Modulators are required. Link the two Modulator units
together as shown in Figure 4. Connect the baseband output from the second modulator in the chain to the TX9
emitter(s) baseband input connector.
Figure 4: Baseband Connection, Four Channel Operation
MOD 232 MODULATOR #2 (REAR)MOD 232 MODULATOR #1 (REAR)
COAXIAL CABLE (WCA 068) TX9 BASEBAND INPUT
BASEBAND
OUTPUT
BASEBAND
OUTPUT
BASEBAND
INPUT
A249
IMPORTANT: Each channel must be set to a dierent frequency!

SoundPlus®Infrared Listening System
6
Audio Connection
Microphone Input:
With the modulator DIP switches set for microphone input, the 3-pin XLR jack accepts balanced microphones. Power
for condenser microphones can be selected by DIP switch. The minimum input level is 100uV and the maximum level
is 90 mV.
XLR Line-Level Input:
With the modulator DIP switches set for line-level input, the 3-pin XLR jack accepts balanced line-level audio inputs.
The minimum input level is 21mV and the maximum level is 10V.
1/4" TRS Line-Level Input:
The 1/4" Tip/Ring/Sleeve (TRS) jack can accept only a balanced or unbalanced line-level input. A 25 V, 70 V, or 100V
speaker line can be connected to the balanced line input using an appropriate attenuator. “T” pads made with
resistors yield better fidelity than speaker matching transformers.
Figure 5: Audio Connection
BALANCED LINE USING 3–PIN CONNECTOR
IN PHASE
1 2
3
3 PIN CONNECTOR
A108
UNBALANCED LINE USING 3–PIN CONNECTOR
1 2
3
3 PIN CONNECTOR
A105
BALANCED LINE USING 1/4" CONNECTOR
IN PHASE
A106
UNBALANCED LINE USING 1/4" CONNECTOR
A107
Features and Controls
Figure 6: Features and Controls (MOD 232 Rear)
A254
COMPRESS CONTROL
2:1 SETTING WILL
INCREASE TRANSMITTED
AUDIO UP TO 30 dB
DURING PERIODS OF
LOW LEVEL SOUND.
INPUTS MIXED
INDICATES CHANNEL
A AND CHANNEL B
ARE MIXED AND
TRANSMITTED
BY CHANNEL A.
CHANNEL B IS OFF.
STEREO LED
INDICATES
STEREO MODE.
AUDIO LEVEL
CONTROLS
POWER SWITCH
TURNS THE MODULATOR
ON AND OFF. THE WALL
MOUNTED POWER SUPPLY
STAYS ON AT ALL TIMES.
LEVEL INDICATORS
INDICATOR SHOWS
AUDIO LEVEL IN 3dB
INCREMENTS.
IR LED
FOR TESTING
RECEIVERS.
PHONE SWITCH
SELECTS CHANNEL
A OR B AUDIO
WHEN NOT IN
STEREO MODE.
PHONE JACK
1/4” PHONE JACK.
MONITORS CHANNEL
A OR B STEREO AUDIO
DEPENDING ON
POSITION OF PHONE
JACK SWITCH, AND
MODE OF OPERATION.
POWER ON
INDICATOR
CARRIER (CXR) LEDs
INDICATES SELECTED
FREQUENCY, FLASHES
TO INDICATE A FAULT.

SoundPlus®Infrared Listening System
7
Configuration Settings
Figure 8 illustrates how to configure your system using the DIP switches (Figure 7) located on the back of the MOD
232 Modulator. This diagram is also printed on top of the MOD 232 Modulator unit for quick reference.
Figure 7: Configuration Switches
CHANNEL A AND B
CONFIGURATION
SWITCHES
A252
Figure 8: DIP Switch Configuration Chart
IMPORTANT: Channel A and Channel B must be set to dierent frequencies!
A250
Compressor Gain
The MOD 232’s Compressor Gain is set in “Moderate” mode from the factory. Use this setting for simultaneous
interpretation. Be sure that the compress control, located on the front of the MOD 232 (Figure 6, page 6), is turned
fully counter-clockwise. Compression can be added if desired by turning the compress control clockwise.
For hearing assistance applications, the MOD 232’s Compressor Gain can be set to “Maximum” mode. For additional
compression, use a tuning wand (PLT 005) or small screw driver and gently turn the compress control (Figure 6, page
6) on the front of the MOD 232 clockwise.

SoundPlus®Infrared Listening System
8
TX9 Emitter Setup
TX9 Location and Placement
To determine the best location for the TX9 Emitter, it helps to think of the IR emitter as an invisible floodlight. You’ll want
to aim it so the listeners are “flooded” with the infrared light. Mount the emitter at least 2 ft (.61 m) above the audience.
Position the emitter to face in a slightly downward angle - that will increase the “throw” of the infrared beam. Infrared
light reflects o most surfaces and scatters, increasing the coverage area. Rough surfaces tend to absorb infrared light,
minimizing reflections, and limiting coverage to the direct illumination. Remember: opaque objects block infrared light.
Thus, emitters cannot be concealed behind opaque walls, curtains, etc.
The emitter front red plastic lens must NOT be painted. Neither should emitters be used in areas of extreme high or low
temperature, humidity, or chemical environments.
The TX9 Infrared Emitter should not be installed where there is a lot of direct sunlight, which can create infrared
interference.
Figure 9: 3 Dimension Foot Pattern
A237
Figure 10: NOTE: When pointing the emitter, be sure to keep the long dimension horizontal.
CORRECT
INCORRECT
A230

SoundPlus®Infrared Listening System
9
Coverage Area
Figure 11: Maximum Range when using the RX22-4, RX15-2, or RX18 receiver
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
10
20
30
40
50
60
70
80
90
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160
FEET
FEET
RX22-4 RECEIVER
RX18 RECEIVER
RX15-2 RECEIVER
RECEIVER COVERAGE AREA WITH
TX9 OR TX90 TRANSMITTER IN
SINGLE CHANNEL MODE
A136
These patterns are the direct radiation pattern. The infrared radiation does not drop to zero outside the illustrated
patterns; it decreases. It still may be usable at a greater distance, depending on the receiver sensitivity and the
reflective characteristics of the room. Reflections of the infrared light from walls, ceilings, and floors may change
these patterns.

SoundPlus®Infrared Listening System
10
Multiple Emitters Installed to Maximize Coverage
Figure 12A
WIR TX9 WIR TX9
WIR TX9 WIR TX9
A262
Figure 12A and 12B: Overlapping Illumination
Patterns to Cover Larger Listening Areas
Figure 12B
WIR TX9
COVERAGE AREA
WITH SINGLE EMITTER
COVERAGE AREA
WITH SECOND EMIT
TER
ADDED TO SAME
EMISSION POINT
(50% INCREASE)
WIR TX9
A263
Figure 13: Connecting Multiple TX9 Emitters
MOD 232 MODULATOR (REAR)
TO SECOND TX9 EMITTERTO THIRD TX9 EMITTER TO TX9 EMITTER
BASEBAND
OUTPUT
BASEBAND
INPUT
WIR TX9 EMITTER #3 (REAR)
Power On Baseband On
Multi-Channel Infrared Transmitter
Made in U.S.A.
24 VACNC
CAUTION
RISKOF ELECTRIC SHOCK
DONOT OPEN
WARNING:TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
Power In:
24VAC
50-60Hz
35VA
Power Supply Wiring:
Baseband Signal Wiring:
Baseband Signal Wiring:
Note: It is normal for this unit to feel warm while it is in operation.
Plug
Use NEC, Class 2 Wiring, 18 ga. minimum,
200 ft. (70m) maximum length (18 ga.)
Use 50 Ohm Coaxial Cable (RG58)
Use RG58 Coax,1000 ft. (350m) max. length
www.williamssound.com
InOut Out
50 Ohms
Baseband
(Modulation)
~
Mounting
Bracket
RoHS
Class 1
LED Product
Williams Sound, Minneapolis, Minnesota, USA
Patent Pending
TO ADDITIONAL
EMITTERS
TO ADDITIONAL EMITTERS
WIR TX9 EMITTER #2 (REAR) WIR TX9 EMITTER #1 (REAR)
Power On Baseband On
Multi-Channel Infrared Transmitter
Made in U.S.A.
24 VACNC
CAUTION
RISKOF ELECTRIC SHOCK
DONOT OPEN
WARNING:TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
Power In:
24VAC
50-60Hz
35VA
Power Supply Wiring:
Baseband Signal Wiring:
Baseband Signal Wiring:
Note: It is normal for this unit to feel warm while it is in operation.
Plug
Use NEC, Class 2 Wiring, 18 ga. minimum,
200 ft. (70m) maximum length (18 ga.)
Use 50 Ohm Coaxial Cable (RG58)
Use RG58 Coax,1000 ft. (350m) max. length
www.williamssound.com
InOut Out
50 Ohms
Baseband
(Modulation)
~
Mounting
Bracket
RoHS
Class 1
LED Product
Williams Sound, Minneapolis, Minnesota, USA
Patent Pending
A256
BASEBAND
OUTPUT
BASEBAND
INPUT
BASEBAND
OUTPUT
BASEBAND
OUTPUT
BASEBAND
INPUT
BASEBAND
OUTPUT
An unlimited number of WIR TX9 emitters can be daisy-chained together to maximize the coverage area.
Remember that each emitter needs its own power supply and cannot share a power supply with a modulator or
another emitter.