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Basic Courtroom System • Model WIR SYS 1
SoundPlus
®
Basic Courtroom System • Model WIR SYS 1
D
D
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
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.
©2006, Williams Sound Corp. MCAT 027D
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