Williams Sound SoundPlus Infrared Transmitter WIR TX90 User Manual



The TX90 two channel IR transmitter combines modulator and emitter technology into a single operating unit, which
reduces operating cost and eliminates precious rack space.  The TX90 transmitter produces a wide-angle infrared sig-
nal that concentrates the IR energy efficiently in the listening area.  Operating on the 2.3-3.8 MHz bandwidth, the
TX90 is less susceptible to radio and lighting interference. Each TX90 transmitter can cover up to 28,000 sq ft (2,600
sq m) in single-channel operation.  The coverage area can be easily increased by connecting additional  TX9 emitters.
A wall/ceiling omnidirectional mount is included, and stand kits are available for portable operation.

Dimensions, Weight:

11.25" W x 6.25" H x 2.125" D (28.6 cm x 15.9 cm x 5.4 cm), 1.8 lbs (0.8 kg)

Color:

Black with white legends, black acrylic lens

Power Supply:

Wall Transformer, 24 VAC, 50-60 Hz, 35 VA, 3-pin MOLEX Connector
North America:

TFP 010, UL/CSA

Europe:

TFP 027-01, 2-pin Schuko plug, CE

UK:

TFP 027-02, 3-pin UK plug, CE

Power Cable:

NEC Class 2 wiring, two-conductor, 18 ga., 200’ (61m) max. length

Modulation:

FM Wideband, +50kHz deviation max., 50uS pre-emphasis

Carrier Frequency:

Channel A: Selectable, 2.3/2.8 MHz,
Channel B: Selectable, 3.3/3.8 MHz

Emitter IR Power:

3.5 watts

Coverage Area:

28,000 ft

2

(2,600 m

2

) in single-channel mode when using the RX22-4 Receiver

18,000 ft

2

(1,670 m

2

) in four-channel mode when using the RX22-4 Receiver

3,500 ft

2

(325 m

2

) in single-channel mode when using the RX14-2 Receiver

3,063 ft

2

(285 m

2

) in single-channel mode when using the RX16 Receiver

(See coverage area diagrams)

Signal-to-Noise Ratio:

>75 dB, +3dB 

Frequency Response:

80 to 15,000 Hz, electrical response

Total Harmonic Distortion:

Less than .2%, electrical response at 1kHz

Compression:

Music preset  1:1, Voice preset  1.5:1, Hearing Assist preset 2:1

Auto Carrier Shut-Off:

20 minute timer shuts off carrier when no audio is present

Power Indicator:

Red LED

Audio Volume Level Controls:

CHA and CHB Input Level, press to select, 28 dB adjustable range

Audio Indicators:

CHA and CHB Audio Level, yellow LED, flash

Carrier LEDs:

2 green LED carrier “on” indicators 

Phones Output:

3.5mm TRS headphone jack. CH A tip, CH B ring on jack, 32 ohm headphone (min)

Application Preset:

Music, Voice, Hearing Assist.  Frequency response;  Music: Flat;  Voice: Mid-range
boost;  Hearing Assist: High frequency boost

Tone Control:

Press to select, 21 dB adjustable range (1 kHz between low boost/hi-cut and low
cut/hi boost).

©2008, Williams Sound Corp.  MCAT 042C

1

* 90 days on accessories.