SoundPlus® Basic Courtroom System • Model WIR SYS 1
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ADA COURTROOM ASSISTIVE LISTENING SYSTEM
Description:
The Basic Courtroom System, model WIR SYS 1, is the complete hearing assistance solution for the courtroom.
Listeners wear wireless RX22-4 receivers to hear the proceeding anywhere in a 28,000 ft2 area**. For the severely
hard of hearing, the RX22-4 can be equipped with a neckloop (included) to amplify their telecoil equipped hear-
ing aid. SoundPlus infrared technology ensures privacy and security: the message of the proceeding doesn’t travel
outside the walls of the courtroom.
Each WIR SYS 1 package includes: one (1) TX9 emitter, one (1) MOD 232 modulator, four (4) body-pack style RX22-4
receivers, four (4) HED 021 Headphones, one (1) neckloop and one (1) RPK 005 rack panel kit. The WIR SYS 1 meets
and exceeds government ADA regulations for public hearing assistance, and is backed by a five-year warranty.*
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, 24VAC, 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, +50kHz deviation, 50uS 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: 16 dB. Max: 33 dB
15-minute timer shuts off carrier when no audio is present (can be disabled)
Auto Carrier Shut-Off:
Fig. 1: MOD 232 Front Panel
Two Channel Infrared System Modulator
Williams Sound
Microprocessor Controlled
Frequency Synthesized
+9
+6
+3
0
+9
+6
+3
0
Inputs Mixed
3.8
3.3
2.8
2.3
3.8
3.3
2.8
2.3
5
5
Phones
4
6
4
6
Compress
Compress
7
8
9
7
8
9
Stereo
IR
3
3
2
1
- 3
-6
- 3
-6
2
Power
-9
-9
CH A
CH B
1
-12
-15
-18
-12
-15
-18
Frequency
(MHz)
Frequency
(MHz)
0
10
0
10
Level
Level
Channel A
Channel B
Power Switch:
Power Indicator:
Two-position push button, ON/OFF
Green LED
Audio Level Controls:
Audio Indicators:
Carrier LEDs:
Compress Control:
Input Mix LED:
Stereo 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
Indicates inputs A and B audio are mixed and transmitted by CHA, 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!
**In single channel mode with TX9 emitter
* 90 days on accessories.
©2006, Williams Sound Corp. MCAT 027D
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SoundPlus® Basic Courtroom System • Model WIR SYS 1
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Fig. 3: WIR TX9 Rear Panel
Multi-Channel Infrared Transmitter
RoHS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
Class
LED Product
1
Mounting
Bracket
Note: It is normal for this unit to feel warm while it is in operation.
Power Supply Wiring:
Use NEC, Class
2
Wiring, 18 ga. minimum,
200 ft. (70m) maximum length (18 ga.)
Baseband Signal Wiring:
Use 50 Ohm Coaxial Cable (RG58)
Baseband Signal Wiring:
Use RG58 Coax,1000 ft. (350m) max. length
Williams Sound Corp., Minneapolis, Minnesota, USA
Patent Pending
Made in U.S.A.
Baseband
(Modulation)
NC 24 VAC
Power In:
Out
Out
In
24VAC
~
Plug
50 Ohms
50-60Hz
35VA
Power On
Baseband On
Fig. 4: Receiver Coverage Area with TX9 Emitter in Single Channel Mode
90
80
Feet
Receiver Coverage Area with TX9
Transmitter in Single Channel Mode
70
60
RX22-4 Receiver
RX14-2 Receiver
RX16 Receiver
50
40
30
20
10
0
RX16
RX14-2
RX22-4
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
90 100 110 120 130 140 150 160
10 20 30 40 50 60 70 80
Feet
The coverage area for the TX9 will vary depending on the receiver being used. The diagram above
demonstrates the receiver coverage when operating a single TX9 emitter in single channel mode.
Patterns are direct radiation patterns.
Note: Reflections of the infrared light from walls, ceilings and floors may change these patterns.
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
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SoundPlus® Basic Courtroom System • Model WIR SYS 1
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Fig. 5: 3-Dimension Foot Pattern
The TX9 floods the listening audience with a
cone shape light pattern as shown here.
The path of the cone shape light leaves a
pattern on the ground, or "foot print, " and
indicates where the strongest receiver
reception will occur.
The actual coverage area will vary depending
on the sensitivity of the receiver being used.
Refer to Figures 4 and 7 to determine how
many emitters are required for 100% coverage
of the listening area.
To determine the best location for the emitter, it helps to think of the IR emitter as an invisible flood-
light. You’ll want to aim it so the listeners are “flooded” with the infrared light. The emitter should also
be positioned high enough so it won’t be blocked by people and other physical obstructions. See Figure
6 below. Mount the emitter at least 2 ft. (.61 m) above the audience. Position the emitter to face in a
slightly downward angle, 20°, that will increase the “throw” of the infrared beam.
Fig. 6: Vertical Beam Spread
Minimum Receiver Range When Operating with a TX9 Emitter in Single Channel Mode
RX22-4 Receiver:
150' (45 m)
RX14-2: 80' (24 m)
RX16: 70' (21 m)
(Range)
TX9
30'
SCREEN
STAGE
6'
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2006, Williams Sound Corp. MCAT 027D
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SoundPlus® Basic Courtroom System • Model WIR SYS 1
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Maximum Range When Using the RX22-4 Infrared Receiver
Fig. 7: Horizontal and Vertical Radiation Polar Plots
HORIZONTAL RADIATION POLAR PATTERNS
VERTICAL RADIATION POLAR PATTERNS
DISTANCE FROM EMITTER TO 1 nW/sq cm CONTOUR
DISTANCE FROM EMITTER TO 1 nW/sq cm CONTOUR
– 90
– 80
– 90
– 80
60
60
200
200
– 70
– 70
– 60
– 60
54
48
42
36
30
24
18
12
6
54
48
42
36
30
24
18
12
6
180
160
140
120
100
80
180
160
140
120
100
80
– 50
– 50
– 40
– 40
– 30
– 30
– 20
– 20
60
60
40
40
– 10
– 10
20
20
0
0
10
10
20
20
30
30
40
40
50
50
60
60
70
70
80
80
90
90
1 Channel, 1 nW/sq cm
(Approx. 28000 sq ft, 2600 sq m)
1 Channel, 1 nW/sq cm
2 Channel, 1 nW/sq cm per channel
(Approx. 18000 sq ft, 1700 sq m)
2 Channels, 1 nW/sq cm per channel
4 Channel, 1 nW/sq cm per channel
(Approx. 11000 sq ft, 1000 sq m)
4 Channels, 1 nW/sq cm per channel
Reflections of the infrared light from walls, ceilings, and floors may change these patterns.
Important: Remember to point the emitter towards the listening audience!
If you’re not getting sufficient coverage with a single, properly installed TX9 Emitter, you may need
to add additional WIR TX9 Emitters to achieve full coverage of your listening area. Figures 8a and
8b illustrate how multiple emitters can be used for large room installations.
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2006, Williams Sound Corp. MCAT 027D
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SoundPlus® Basic Courtroom System • Model WIR SYS 1
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Multiple Emitters Installed to Maximize Coverage
Fig. 8a: Overlapping Illumination Patterns to Cover Larger Listening Areas
TX9
TX9
TX9
TX9
Fig. 8a above is a typical example of how multiple emitters are used to cover larger listening areas.
Generally it is desirable for the illumination patterns to overlap. Note: The coverage area will vary depend-
ing on the infrared receiver being used; refer to Figures 4 and 7 to determine how many emitters are
required to achieve full coverage of a listening area.
Fig. 8b: Overlapping Illumination Patterns to Cover Larger Listening Areas
Coverage Area
with Single Emitter
TX9
Coverage Area
with Second Emitter
TX9
Added to Same
Emission Point
(50% increase)
When two emitters are used at the same emission point in single channel mode, the overall coverage area incre-
ses 50%. When using an RX22-4 receiver, as a result, the coverage area will increase to an estimated 42,000 ft2
(3,902 m2); the RX14-2 will increase to 5,250 ft2 (488 m2); the RX16 will increase to 4,590 ft2 (426 m2 ).
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2006, Williams Sound Corp. MCAT 027D
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SoundPlus® Basic Courtroom System • Model WIR SYS 1
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WIR RX22-4 Receiver:
Fig. 9: WIR RX22-4 Receiver
Receiver Style:
Size:
Body-Pack, dual-lens detector, lanyard
4.5" L x 2.85" W x 1.2" H (114.3 mm x 72.4 mm x
30.4 mm)
4.6 oz (130 g) with batteries
Black
3 ft (.91 m), allows receiver to be worn around the neck
-10° C to +50° C
2 x AA, alkaline (BAT 001) or NiMH (BAT 026)
Alkaline: 60 hours, NiMH: 30 hours/charge
25 mA, nominal
Channel
Selector Knob
Earphone
Jack
Weight:
Color and Material:
Lanyard:
Operating Temperature:
Battery Type:
Battery Life:
Battery Drain:
Charging Contacts:
Carrier Frequency:
OFF
"On"
On/Off
Indicator LED Volume Switch
For use only with CHG 3512
RX22-4 Top
Channel 1: 2.3 MHz, Channel 2: 2.8 MHz
Channel 3: 3.3 MHz, Channel 4: 3.8 MHz
50 uS
De-Emphasis:
FM Deviation:
50 kHz
Signal-to-Noise Ratio:
Squelch:
Frequency Response:
Total Harmonic Distortion:
Controls:
60dB min.
Receiver squelches (mutes) at 40 dB S/N ratio
25 Hz to 16 KHz, +1 dB, -3 dB, electrical response
Less than 1%, electrical response
ON/OFF/VOLUME: combination thumbwheel knob
Channel Selector: four-position rotary switch
Red LED “ON” indicator, flashes to indicate Low battery
3.5 mm stereo mini phone jack
Accepts 3.5 mm mono or stereo phone plug
15 mW max at 32 Ω
Indicators:
Audio Output Jacks:
Audio Output Power:
Acoustic Output:
Sensitivity:
110 dB SSPL90 w/ EAR 013
Better than 1 nW/cm2 for 40 dB signal-to-noise ratio
CE, FCC, RoHS, WEEE
Approvals:
Warranty:
5 years on receiver, 90 days on accessories
Compatible Headphones/Earphones: Mono or stereo, 8-32 ohms, 3.5 mm mini phone plug,
HED 021, HED 026, EAR 013, EAR 014, EAR 022, NKL 001
RX22-4 Front
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2006, Williams Sound Corp. MCAT 027D
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SoundPlus® Basic Courtroom System • Model WIR SYS 1
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Two-Channel System Diagram
Fig. 10: Two-Channel System
WIR TX9 Emitter (rear)
Multi-Channel Infrared Transmitter
RoHS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING:TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
Class
LED Product
1
Mounting
Bracket
Note: It is normal for this unit to feel warm while it is in operation.
Power Supply Wiring:
Use NEC, Class
2
Wiring, 18 ga. minimum,
200 ft. (70m) maximum length (18 ga.)
Baseband Signal Wiring:
Use 50 Ohm Coaxial Cable (RG58)
Baseband Signal Wiring:
Use RG58 Coax,1000 ft. (350m) max. length
Williams Sound Corp., Minneapolis, Minnesota, USA
Patent Pending
Made in U.S.A.
Baseband
(Modulation)
NC 24 VAC
Power In:
Out
Out
In
24VAC
~
Plug
50 Ohms
50-60Hz
35VA
Power On
Baseband On
To Additional
Emitters (if necessary)
MOD 232 Modulator (Rear)
MOD 232 Infrared System Modulator
Williams Sound
Audio Line
Output
Input CH
A
Input CH
B
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
CH
CH
A
B
Baseband
Input
Output
Output
CH
CH
A
Power In
24 VAC, 15 VA, 50-60 Hz
Plug
Configuration
Switches
B
50 Ohms
Made in USA
100 Ohms
24V
Baseband Signal
CHA
Audio In
CHB
Audio In
RX22-4 Receiver
(wireless)
SOUND SYSTEM
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
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SoundPlus® Basic Courtroom System • Model WIR SYS 1
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Bid Specs
Modulator, Model MOD 232
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 head-
phone 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 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
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 bal-
anced 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.
Emitter, Model TX9
The emitter shall be contained in a metal enclosure with a shatter-resistant lens. The emitter shall include an omni-direc-
tional mounting bracket for permanent installation and a bracket shall be available for mounting on a floor stand for
portable installations. Each emitter shall be powered by a 24 VAC, 50 VA, 50-60 Hz power supply. The power connector
shall be a 3-pin Molex-type. The emitter shall have a BNC-type 50 ohm baseband input and a BNC-type baseband 50 ohm
output jack. The emitter shall have a repeater circuit to allow multiple numbers of emitters to operate from the base-
band signal. The emitter shall have a visible LED indicator for power and for baseband signal. Carrier frequency is 50KHz
to 8 MHz. The emitter shall shut off when the baseband signal is not present. The emitter shall provide an effective cov-
erage area of 28,000 sq ft (2,600 sq m) in single channel mode and 18,000 sq ft (1,700 sq m) in two channel mode when
using the RX22-4 receiver. The emitter shall be convection-cooled, without fans. The emitter shall have CE, FCC, RoHS,
and WEEE approval and carry a five-year warranty on parts and labor.
The emitter shall be Williams Sound Corp. model WIR TX9.
Four-Channel Receiver, Model RX22-4
The receiver shall be a body-pack type with IR detector lens behind face of the unit. The unit shall have a lanyard for hands-
free operation. The receiver shall have a rotary-type volume control. The receiver shall operate for 60 hours with two AA
alkaline batteries and for 30 hours per charge with NiMH AA batteries. The receiver shall be charged without battery
removal via charger contacts in the case. A drop-in charger accessory shall recharge the batteries in 8 hours when used with
CHG 3512 charger. The receiver shall be housed in an impact resistant plastic case with a hinged battery door that does not
separate from the receiver. The receiver shall receive 2.3 MHz, 2.8 MHz, 3.3 MHz or 3.8 MHz modulated IR signals with 50 µS
de-emphasis. The receiver shall have a 3.5 mm stereo phone jack and accommodate low-impedance mono or stereo ear-
phones and headphones. The receiver shall accommodate neckloop telecoil couplers. The receivers shall provide 110 dB
SSPL90 output with EAR 013 earbud-type earphone.
The system electrical frequency response shall be 25 Hz to 16 kHz, +1, -3 dB and the signal-to-noise ratio shall be 60 dB. The
receiver shall have CE, FCC, RoHS, and WEEE approval. The receiver shall be covered by a five-year parts and labor warranty,
excluding earphones, headphones, batteries and chargers.
The receiver shall be the Williams Sound Corp. model WIR RX22-4.
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
©2006, Williams Sound Corp. MCAT 027D
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SoundPlus® Basic Courtroom System • Model WIR SYS 1
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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
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, Australia, Europe, Latin America, South America, South Africa
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!
©2006, Williams Sound Corp. MCAT 027D
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