Installation guide

4
u DETERMINE COVERAGE AREA
Determine the coverage area needed for the seating area. When using the WIR TX90 transmitter with the
RX22-4 receiver, in single channel mode, the WIR TX90 can achieve a coverage area of 28,000 ft
2
(2,600 m
2
). In four channel mode, the WIR TX90 divides its power among the four signals to achieve a
coverage area of 11,000 ft
2
(1,022 m
2
). NOTE: The coverage area will vary depending on the sensitivity
of the infrared receiver being used. The following diagram illustrates coverage area when using a RX22-
4, RX14-2, or RX18 receiver with a single WIR TX90 transmitter in single channel mode.
FIGURE 2: MAXIMUM RANGE WHEN USING THE RX22-4, RX14-2, OR RX18 RECEIVER
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 the receiver sensitivity and the
reflective characteristics of the room.
Reflections of the infrared light from walls, ceilings, and floors may change these patterns.
Important: Remember
to point the transmitter
towards the listening audience!
Remember: opaque objects block infrared light.
Thus, the transmitter cannot be concealed behind opaque walls, curtains, etc.