Bosch INTEGRUS Especificaciones descargar pdf (Pagina 9)

For rotations of less than +/- 45 degrees this effect is not

large, but for larger rotations the sensitivity will decrease

rapidly.

Figure 2.4 Directional characteristics of the receivers

2.3.2 The footprint of the radiator

The coverage area of a radiator depends on the number

of transmitted carriers and the output power of the radia-

tor. The coverage area of the LBB 4512 radiator is twice as

large as the coverage area of the LBB 4511. The coverage

area can also be doubled by mounting two radiators side

by side. The total radiation energy of a radiator is distrib-

uted over the transmitted carriers. When more carriers

are used,the coverage area gets proportionally smaller.

The receiver requires a strength of the IR signal of 4

mW/m2 per carrier to work without errors (resulting in a

80 dB S/N ratio for the audio channels). The effect of the

number of carriers on the coverage area can be seen in

figure 2.5 and figure 2.6.The radiation pattern is the

area within which the radiation intensity is at least the

minimum required signal strength.

Figure 2.5 Total coverage area of LBB 4511/00 and LBB 4512/00 for

1 to 8 carriers

200

400

600

800

1000

1200

1400

1600

1800

2000

12345678

LBB 4511/00

LBB 4512/00

Figure 2.6 Polar diagram of the radiation pattern for 1, 2, 4 and 8 carriers

The cross section of the 3-dimensional radiation pattern

with the floor of the conference venue is known as the

footprint (the white area in figure 2.7 to figure 2.9).

This is the floor area in which the direct signal is strong

enough to ensure proper reception, when the receiver is

directed towards the radiator. As shown, the size and

position of the footprint depends on the mounting height

and angle of the radiator.

Figure 2.7 The radiator mounted at 15° to the ceiling

Figure 2.8 The radiator mounted at 45° to the ceiling

Figure 2.9 The radiator mounted perpendicular (at 90°) to the ceiling

Integrus Data brochure | System description and planning |9

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 31 32

Comentarios a estos manuales

Sin comentarios

Bosch INTEGRUS Especificaciones Pagina 9

Comentarios a estos manuales

Relacionado con productos y manuales para Los Sistemas De Control De Acceso De Seguridad Bosch INTEGRUS