Installation Procedures

WIR TX75 Two-Channel Infrared Transmitter

Determine Coverage Area

When using the WIR TX75 transmitter in single-channel mode with the RX22-4 receiver, the system coverage area will exceed 5000 ft² (185 m²). WIR TX75 units automatically adjust to give the best coverage area possible in both 1-channel and 2-channel modes.

Figure 1 illustrates typical coverage pattern for the TX75. This can be affected by direct/indirect sunlight, reflections on walls and room construction.

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: Most objects block infrared light. The transmitter cannot be concealed behind walls, glass, curtains, etc. 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.

The TX75 and TX75-S can be operated with or without the faceplate, if desired. The faceplate can be removed and painted to

match room decor. Lightly sand faceplate with 400 grit sandpaper apply primer and two coats of final color. Do not paint the infrared lens behind the faceplate of the TX75.

Figure 1: Receiver coverage area with WIR TX75 transmitter OR WIR TX75-S slave emitter in single channel mode.

FEET					RX18 RECEIVER					RX15-2 RECEIVER					RX22-4 RECEIVER
					RX18 RECEIVER					RX15-2 RECEIVER					RX22-4 RECEIVER

0	10	20	30	40	50	60	70	80	90	100	110	120	130	140	150	160	170
40
40

A157

MAN 166C