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System Overview
The WIR TX90 two channel infrared transmitter combines infrared modulator and emitter technology into a single
mountable enclosure - reducing operating cost and eliminating precious rack space.
The WIR TX90 features an easy to use conguration preset for Music, Voice, or Hearing Assistance Applications. It
operates on dual 2.3/2.8 or 3.3/3.8 MHz selectable frequencies - ideal for high quality audio programs such as music,
theater and audio description. The WIR TX90 will accept any line level, balanced or unbalanced audio inputs, and
includes adjustable tone and volume control. Infrared receivers detect the transmission and convert the light signals back
into audio signals. The 2.3-3.8 MHz operating frequencies minimize high efciency lighting interference. No FCC license
or radio approval is required with this equipment. It can be used anywhere in the world.
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.
CH B
AUDIO IN
CH A
AUDIO IN
SOUND SYSTEM
TO ADDITIONAL
EMITTERS
(IF NECESSARY)
MOUNTING
BRACKET
AUDIO
INPUTS
BASEBAND
OUTPUTS
RX22-4 RECEIVERS
(WIRELESS)
A236
POWER
SUPPLY
Figure 1: Typical Two-Channel conguration for the WIR TX90
3
SoundPlus
™
Infrared Listening System
MAN 119H