©
CIAS Elettronica S.r.l.
Ed. 1.0
Installation Handbook
page
31
of
59
MANTA 50 – 80
2.5 Amplitude of the Sensible Beam
The amplitude of the
Sensible Beam depends
on the distance between the transmitter and the
receiver, and on the
sensitivity
adjustment set. The figures below state the horizontal dimension
at half-range of the sensible beam in case of maximum and minimum sensitivity (see next
figures).
1
2
3
4
5
6
7
8
9
10
10
20
30
40
50
60
70
80
90
100
Half range
sensible horizontal
zone dimension [m]
Maximum
sensitivity
Range [m]
Minimum
sensitivity
Figure 3 Free space Horizontal dimension of the sensible beam at half-range for
MANTA/ 50-80
2
4
6
8
10
12
14
16
18
20
10
20
30
40
50
60
70
80
90
100
Maximum
sensitivity
Half range
sensible vertical
zone dimension [m]
Range [m]
Minimum
sensitivity
Figure 4 Free space Vertical dimension of the sensible beam at half-range for
MANTA/ 50-80
Remark:
that for the MANTA equipment, the sensitivity regulation to be considered to obtaining
the dimensions of the sensitivity beam at half- section length, is adjusted setting the
thresholds.
The higher the pre-alarm and alarm thresholds the lower the
sensitivity, and vice versa.
It’s important to keep in mind that the
pre-alarm threshold
determines
the beginning of the
intelligent analysis:
all signals below this threshold, are considered noise, and anyway of low
importance. All the signals higher this threshold are analyzed following Fuzzy rules.
The prealarm and alarm thresholds, are settable both with software WAVE-TEST and with rotary
switches on board on each receiver. Default setting corresponds to a medium sensitivity fit for
most of the cases.
Summary of Contents for MANTA 50
Page 55: ...NOTE...
