Williams Sound MOD 112 Instructions de montage

Williams Sound ®

Helping People Hear

SoundPlus®WIR TX800

Two Channel Infrared System

Large Area Infrared Listening System

Modulator Model MOD 112

Emitter Model WIR TX8

Receiver Models WIR RX5, RX6

Installation

Guide &

User

Manual

MAN 084D

SOUNDPLUS®WIR TX800 INFRARED LISTENING SYSTEM,

TWO–CHANNEL INFRARED LISTENING SYSTEM

INSTALLATION GUIDE AND USER MANUAL

Contents Page

SYSTEM OVERVIEW 4

INSTALLATION PROCEDURES 6

STEP 1: TX8 EMITTER SETUP

STEP 2: TX8 POWER WIRING

STEP 3: BASEBAND CABLE CONNECTION

STEP 4: MOD 112 MODULATOR SETUP

STEP 5: TESTING THE SYSTEM

CONTROLS AND FEATURES 14

MOD 112 FRONT PANEL

MOD 112 REAR PANEL

TX8 EMITTER REAR PANEL

RECEIVER INSTRUCTIONS 19

TROUBLESHOOTING 21

WARRANTY 22

SPECIFICATIONS 23

NOTE: TAKING A FEW MINUTES NOW TO READ THESE INSTRUCTIONS WILL SAVE TIME AND ENSURE PROPER

SYSTEM OPERATION.

Williams Sound ®

Helping People Hear

Williams Sound ®

Helping People Hear

SYSTEM OVERVIEW

The Williams Sound WIR TX800 System consists of a MOD 112 Modulator and one or more

TX8 Emitters which use invisible infrared (IR) light waves to broadcast speech or music to

wireless infrared receivers.

The MOD 112 accepts a variety of audio inputs and sends 95 kHz and 250 kHz frequency

modulated signals to the TX8 Emitter via coaxial cable. The emitter emits invisible infrared

light into the listening area. Infrared receivers detect the transmission and convert the light

signals back into audio signals.

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

affected by interference from radio equipment and does not interfere with radio equipment.

No FCC license is required.

The TX8 Emitter is designed to distribute its power equally among the channels sent to it for

transmission. Thus, when only a single channel is present, the TX8 uses all its power to

broadcast the lone signal, achieving a coverage area of approximately 10,000 square feet

(930 square meters). When two signals are sent to the TX8 (as is the case when the MOD

112 is in Stereo mode or in Discrete mode when both channels are in use), the TX8 divides

its power among the two signals. This makes for a practical coverage area of about 3,767

square feet (350 square meters). This important principle is illustrated in Figure 3. Larger

areas can be covered with additional emitters.

The system can be used with a microphone as a stand-alone system, or can be connected to

an existing sound system. Infrared Systems cannot be used in bright sunlight because of

sunlight’s large amount of interfering infrared light.

Williams Sound ®

Helping People Hear

TX8 Emitter

MOD 112 Modulator

Baseband In

Baseband Out

Power Supply

120 VAC (US): TFP 016

230 VAC (CE): TFP 027

Power Supply

120 VAC (US): TFP 010

230 VAC (CE): TFP 027

Power On

Indicator

(Visible From Below)

Baseband

Present

Indicator

(Visible From Below)

Phones

Infrared

Test Out

MOD 112 Two-Channel Infrared System Modulator Williams Sound

Power

CXR

Limit

Compress

Discrete

Stereo

Audio Mode Phones

CH1

CH2

CXR

-21 -18 -15 -12 -9 -6 -3 0 +3 +6-21 -18 -15 -12 -9 -6 -3 0 +3 +6

CH 1 Level CH 2 Level

Channel 1 Channel 2

Power Supply

120 VAC (US): TFP 010

230 VAC (CE): TFP 027

Baseband Signal

Power Supply

120 VAC (US): TFP 010

230 VAC (CE): TFP 027

MOD 112 Modulator

Power Supply

120 VAC (US): TFP 016

230 VAC (CE): TFP 027

Baseband In

Baseband

Out

TX8 Emitter

Phones

Infrared

Test Out

MOD 112 Two-Channel Infrared System Modulator Williams Sound

Power

CXR

Limit

Compress

Discrete

Stereo

Audio Mode Phones

CH1

CH2

CXR

-21 -18 -15 -12 -9 -6 -3 0 +3 +6-21 -18 -15 -12 -9 -6 -3 0 +3 +6

CH 1 Level CH 2 Level

Channel 1 Channel 2

Baseband Out

Baseband In

FIGURE 1A: TYPICAL SYSTEM CONFIGURATIONS

FIGURE 1B: USING AN ADDITIONAL TX8 EMITTER FOR GREATER COVERAGE AREA.

Williams Sound ®

Helping People Hear

INSTALLATION PROCEDURE

INSTALLATION STEP 1: TX8 EMITTER SET-UP

SELECTING A MOUNTING LOCATION

The most important principle to understand when installing the TX800 system is that invisible infrared

light behaves just like visible light. It does not pass through opaque objects such as walls, curtains, or

people. It does pass through windows and door openings and can bounce and scatter off reflective walls,

floors, and ceilings. Therefore, the infrared emitter panels should not be concealed or covered, nor should

the infrared “eye” on receiver units be covered. Receivers work best with a clear line-of-sight to the

emitter panels.

The TX8 Infrared Emitter should not be installed outdoors, or where there is a lot of direct sunlight

indoors. Sunlight generates infrared interference. Certain types of high-efficiency lighting fixtures can also

generate interference at 95 kHz because they use high frequency modulation.

MOUNTING THE TX8 TO A WALL OR CEILING:

Step 1: Using the mounting plate (Figure 2A) as a template, mark the hole locations on the mounting surface

where the TX8 will be installed. See Page 7, Figure 2B for optional mounting positions.

Step 2: Locate the top mounting hole in the rear of the TX8 emitter. Gently screw the male end of the swivel

head on to the emitter. Tighten the swivel head tension screw: turn clockwise until the connection is secure.

Step 3: Screw the male end of the shaft into the female end of the swivel head. An additional shaft can be

added to create more distance between the wall/ceiling and Emitter.

Step 4: Place the plate cover snugly over the mounting plate. This will hide the screws after installation.

Step 5: Screw the male end of the mounting plate into the female end of the shaft. For suspended ceilings, screw

the female end of the shaft into the male end of the T-Bar clip. The mounting bracket is now installed on to

the TX8 Emitter.

Step 6: Position the TX8 Emitter and BKT 024 so the mounting plate lines up with the marked holes on the

mounting surface. Fasten the mounting plate to the surface using screws and wall anchors. Mounting

the TX8 to a Suspended Ceiling with Cross Tee: Fasten the T-Bar clip on to the desired Cross Tee.

Step 7: Position the TX8 Emitter to the desired angle: Begin by gently turning the tension screw (Figure 2A) counter

clockwise to release the swivel head. Adjust the TX8 to the desired angle. When the TX8 is in the desired

position, gently turn the tension screw clockwise until the swivel head is securely in place.

FIG. 2A: BRACKET 024 MOUNTING

TX8 Emitter Swivel Head

tension screw

Shaft

(optional) Shaft Plate

Cover Mounting

Plate

Mounting

Screws

(To Wall or Ceiling)

Williams Sound ®

Helping People Hear

ILLUMINATION PATTERNS

The infrared illumination pattern from a single emitter is cone-shaped, with a 50° angle. The

horizontal and vertical patterns are identical. Figures 3, 4, and 5 show top and side views of

coverage patterns.

TX8

25°

75 ft. (23 m)

135 ft. (41 m)

67 ft. (20 m)

37 ft. (12.5 m)

Two Channel Mode

Practical coverage

area is approx. 3,767

sq. ft. (350 sq. m)

Single Channel Mode

Non-reflective

coverage area is

approx. 10,000 sq. ft.

(930 sq. m)

FIGURE 3: IR PATTERNS, SINGLE EMITTER INSTALLATION

TX8 TX8

TX8TX8

FIGURE 4: MULTIPLE EMITTERS INSTALLED TOMAXIMIZE COVERAGE

FIG. 2B: WALL OR CEILING MOUNT

Figure 2a: Mounting the TX8 on

to a wall with the BKT 024.

Tip: To keep the TX8 level, rotate

the tension screw (Fig. 2A) so it

rests on top of the bracket.

Figure 2b: Mounting the TX8 on

to a ceiling with the BKT 024.

A. B.

Williams Sound ®

Helping People Hear

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 useable at a greater distance, depending on receiver

sensitivity and the reflection characteristics of the room.

Infrared light reflects off most surfaces and scatters, increasing the coverage area. Rough surfaces tend

to absorb infrared light, minimizing reflections, and limiting coverage to the direct illumination pattern.

It’s helpful to think of the IR emitter as an invisible floodlight. You want to aim it so listeners are

“flooded” with infrared light.

It’s desirable for the illumination patterns to overlap when multiple emitters are used. Placing the

emitters high above the audience (15–30 ft./4-8m) and aiming them slightly downward (5°–15°) will

ensure the longest “throw” of the infrared beam. Angling the emitter inward towards the center of the

room also increases the coverage of the seating area.

Remember: opaque objects block infrared light. Thus, emitters cannot be concealed behind opaque

walls, curtains, etc. Neither should emitters be used in areas of extreme high or low temperatures,

humidity, or chemical environments.

COVERAGE AREA

The TX8 Emitter is designed to distribute its power equally among the channels sent to it for

transmission. Thus, when only a single channel is present, the TX8 uses all its power to broadcast the

lone signal, achieving a coverage area of approximately 10,000 square feet (930 square meters). When

two signals are sent to the TX8 (as is the case when the MOD 112 is in Stereo mode or in Discrete mode

when both channels are in use), the TX8 divides its power among the two signals. This makes for a

practical coverage area of about 3,767 square feet (350 square meters) or about 350 average theater

seats. This important principle is illustrated in Figure 3.

If you’re not getting sufficient coverage with a single, properly installed emitter panel, you’ll need to add

additional TX8 Emitters to achieve full coverage of your listening area.

Figures 3, 4, and 5 illustrate infrared light patterns and recommended emitter locations. In listening areas

up to 3,767 square feet (350 sq. m.) , the TX8 Emitter panel should be installed on the front wall of the

listening area in a position to flood the listening area. It must be above the audience to permit a direct

line of sight between the emitter and people wearing receivers when the people are standing or sitting.

Listening areas of more than 3,767 square feet (350 sq. m.) will require two or more TX8 Emitters for

complete coverage. Place one emitter panel on the left side of the front wall and the other on the right

hand side. For extremely large venues, additional TX8s should be located to maximize coverage

throughout the listening area.

120'

SCREEN

30'

STAGE

Center Of Emitter Beam

TX8

FIGURE 5: SIDE PERSPECTIVE

Williams Sound ®

Helping People Hear

INSTALLATION STEP 2: TX8 POWER WIRING

FOR U.S. APPLICATIONS:

The TX8 Emitter is supplied with a low-voltage wall transformer power supply

(TFP 010). Two-conductor 18 ga. power cord is included with the emitter.

FOR APPLICATIONS OUTSIDE THE U.S. REQUIRING 240 VAC MAINS SUPPLY:

Use the wall transformer power supply, model TFP 027.

Secondary Specifications: 24 VAC, 35 VA, 50/60 Hz.

WARNING: POWERLINE VOLTAGE MUST NOT FALL BELOW 94V, OR

SYSTEM PERFORMANCE WILL BE GREATLY REDUCED!

DO NOT CONNECT THE POWER SUPPLY TO AC POWER YET!!!

Step 1: Determine the length of power cord needed to reach from the transmitter to the AC

wall outlet where the power supply will be plugged in. If power cord length will

exceed 200 feet (61 m), heavier gauge wire will be required. Use the table below.

Make sure the power supply is not plugged into AC power yet!

Cable Length Required Minimum Wire Gauge

Up to 10 feet (3 m) 22 gauge

Up to 5 feet (23 m) 20 gauge

Up to 200 feet (61 m) 18 gauge

Up to 500 feet (152 m) 16 gauge

Up to 1,000 feet (305 m) 14 gauge

One end of the power cord has a 3-pin Molex connector, the other end is bare. Cut

the bare end of the power cord to length. Strip this end down the middle

approximately

1 inch, then strip both of the resulting strands about 1/8 inch. Install the crimp-on

spade terminals supplied and connect these to the screw terminals on the Power

Supply (TFP 010). Polarity is not important since AC power is being used.

Step 2: Plug the 3-pin Molex connector into the TX8’s Power In connector.

Step 4: Plug in the Power Supply last.

The Power Indicator LED on the right side of the bottom panel (visible from

directly underneath) glows when the TX8 is on.

Note: The TX8 transmits when an audio signal is present, and will shut off when no

signal is present for about 30 minutes. This auto shut-off feature preserves the life

of the infrared LEDs and reduces power consumption.

This system is designed for Class 2, low-voltage wiring. Always follow local electrical codes

when doing low voltage wiring.

!! IMPORTANT WARNING !!

SHORTING THE POWER SUPPLY OUTPUT TERMINALS WILL BLOW A

NON-REPLACEABLE INTERNAL FUSE, DESTROYING THE POWER SUPPLY UNIT!

Williams Sound ®

Helping People Hear

INSTALLATION STEP 3: BASEBAND CABLE CONNECTION

IFYOU ARE USING ONE EMITTER:

Step 1: Determine the length of RG-58 coaxial cable needed to reach from the emitter to

the modulator unit. The modulator is usually located with the other sound

equipment to simplify audio connections. 100 feet (30 m) of coaxial cable is

included with each emitter. You will need to cut it to length. Additional RG-58

coax can be added. Make sure you leave some slack at each end.

Step 2: Install BNC connectors on each end of the cable. (See Figure 7.)

Step 3: Connect the Baseband cable to the Baseband Out jack on the MOD 112 modulator

and to the Baseband In jack on the TX8 Emitter. (See Figures 6 and 8.)

IFYOU ARE USING MORE THAN ONE EMITTER:

Step 1: Determine the length of coaxial cable needed to reach between the emitters. 100

feet (30 m) of coaxial cable is included with each emitter. You will need to cut it to

length. Additional RG–58 coax can be added. Make sure you leave some slack at

each end.

Step 2: Install BNC connectors on each end of the cable. (See Figure 7.)

Step 3: Connect the baseband cable from the Baseband Out Jack on the first emitter in the

chain (the one connected to the MOD 112 Modulator) to the Baseband In jack on

the next TX8 Emitter in the chain. Use the cable clamps and screws provided to

secure the cable. The coax can also be routed through conduit before attaching

BNC connectors. You can chain as many emitters together as you need. Remember

that each emitter needs its own TFP 010 power supply.

MOD 112 Modulator

Power Supply

120 VAC (US): TFP 016

230 VAC (CE): TFP 027

Baseband Out

TX8 Transmitter

Baseband In

Baseband Out

Baseband In

To Additional

TX8 Transmitters

Baseband Out

Channel

(kHz)

95 250

Power On

CNC

Mounting

Template

Power Supply

120 VAC (US): TFP 010

230 VAC (CE): TFP 027

TX8 Transmitter

Power On

CNC

Mounting

Template

Power Supply

120 VAC (US): TFP 010

230 VAC (CE): TFP 027

Model WIR MOD112 Two-Channel Infrared System Modulator

FIGURE 6: TX8 EMITTER WIRING DETAIL

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