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Expanded Quadrature Systems; Low-Spill System - Bosch PLN-1LA10 Installation And User Instructions Manual

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Plena Loop Amplifier | Installation and User Instructions | Design and planning
2.2.3

Expanded quadrature systems

To cover very large areas, create an expanded
quadrature system (refer to figure 2.5 for an example).
Such a system consists of:
A master loop amplifier (M) with one or more
induction loops. All master induction loops must
have the same size.
An odd number of slave amplifiers (S1, S2, S3, etc.)
with one or more induction loops. All slave
induction loops must have the same size.
Note
Although it is not required, the sizes of the
master and slave induction loops are typically
the same.
90°
S2
90°
M
figure 2.5: Expanded system (example)
Bosch Security Systems | 2005-05 | 9922 141 50672en
2.2.4

Low-spill system

A special type of quadrature system is the low-spill
system (refer to figure 2.6 for an example). A low-spill
system makes sure that the magnetic field strength drops
even more rapid to zero beyond the borders of the
covered area. Such a system consists of:
A master loop amplifier (M) with one or more
induction loops. All master induction loops must
have the same size.
An odd number of slave amplifiers (S1 in this
example) with one or more induction loops. All slave
induction loops must have the same size.
Two slave amplifier (S2 and S3 in this example) with
one induction loop. The width of the induction loops
must be between 50 and 66% of the width of the
master induction loops.
S2
S1
M
S3
figure 2.6: Low-spill system (example)
50-66%W
90°
W
W
90°
50-66%W
en | 15
S1
S3

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