Williams Sound CHG3512, WIRSYS 90 ADV, Model WIRTX90 Determine Coverage Area, RX18 Receiver

SoundPlus™ Infrared Listening System

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 ft2 (2,600 m2). In four channel mode, the WIR TX90 divides its power among the four signals to achieve a coverage area of 11,000 ft2 (1,022 m2).

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, RX15-2, or RX18 receiver with a single WIR TX90 transmitter in single channel mode.

Figure 2: Maximum range when using the RX22-4, RX15-2, or RX18 Receiver

FEET 90
												RECEIVER COVERAGE AREA WITH
80
													TX9 OR TX90 TRANSMITTER IN
70													SINGLE CHANNEL MODE
60
														RX22-4 RECEIVER
50														RX15-2 RECEIVER
40
														RX18 RECEIVER
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
	0	10	20	30	40	50	60	70	80	90	100 110 120 130 140 150 160
FEET														A136

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.

4 MAN 119H