cias MANTA 80 - Page 33

© CIAS Elettronica S.r.l. Ed. 1.0
Installation Handbook page 32 of 59 MANTA 50 – 80
2.6 Length of the Dead Zones near the equipment
The length of the Dead Zones near the equipment is based on the distance of the equipment
from ground, on the sensitivity set on the receiver and on the type of antenna used.
With regard to the considerations stated above, and based on plant requirements, the equipment
must be installed at a certain height from ground. In mean plant the height must be 80 cm.
(from the ground and the centre of the antenna). With medium sensitivity setting, the
suggested crossing overlap is 3.5 m.
20
30
10
40
50
60
70
80
90
100
20
30
10
40
50
60
70
80
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12 345
6
789
10
Antenna
centre height
from ground [cm]
Dead Zone
lenght [m]
Maximum
sensitivity
Minimum
sensitivity
Figure 5 MANTA/50-80: Dead zone length near the equipment versus installation height.
5 M
80-85 cm
Figure 6 MANTA/50-80: Dead zone length near the equipment versus installation height.
D
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a
d
Z
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D
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Z
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Figure 7 - Overlapping of two beams in a cross