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System Description and Planning | 9

Figure 15: Radiators covering seats arranged in a square

Figure 16: Radiator position in a conference hall with auditorium seating and

podium

Figure 17: Radiators covering seats beneath a balcony

Overlapping footprints and multipath effects

When the footprints of two radiators partly overlap, the total

coverage area can be larger than the sum of the two

separate footprints. In the overlap area the signal radiation

power of two radiators are added, which increases the area

where the radiation intensity is larger than the required

intensity.

However, differences in the delays of the signals picked up

by the receiver from two or more radiators can cause the

signals to cancel each other out (multi path effect). In

worst-case situations this can lead to a loss of reception at

such positions (black spots). Figures 18 and 19 show the

effect of overlapping footprints and differences in signal

delays.

Figure 18: Increased coverage from added radiation power

Figure 19: Reduced coverage caused by cable signal delay differences

The lower the carrier frequency, the less susceptible the

receiver is for differences in signal delays.

The signal delays can be compensated by using the delay

compensation switches on the radiators (see manual).

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Bosch INTEGRUS Especificaciones Pagina 13