Opus Technologies LD Serie Manuel D'installation Et D'utilisation page 22

LD Series | Installation and user manual
6.3.3 Simple phased loops
In order to allow a more extensive coverage in large
spaces such as in an exhibition park, a sports hall or a
zenith, it is possible to install several simple loops by
using the input and the slave outputs.
IN
Salve 3
Out90°
Slave 2
IN
Out0°
Slave 1
IN
Out90°
Master
Single loop installation - Figure 16
Refer to page 17 to view the
connection between the amplifiers for
this type of configuration.
User manual
90°
0°
90°
0°
6.3.4 Phased loops with low overflow
When several rooms are adjacent to each other (one
next to each other or one on top of each other), it is
important to take into account the external radiation
of the magnetic field. Indeed, if the amplifier is
adapted, a magnetic induction loop radiates
perfectly in the desired zone but also outside this
zone. Generally, the external coverage is equal to 4
time the width of the room. It is necessary to count 4
times the width to have a total isolation zone.
In order to respond appropriately to this type of
problem, there is a type of installation that allows to
contain the overspill to the strict dimension of the
room. This type of installation also provides other
advantages (see below).
IN
Slave
Out 90°
Master
Installation of a phased loop system - Figure 17
Why install low overflow multi-loops?
•
Suppression of magnetic field directivity (vertical
and horizontal fields are transmitted).
•
No attenuation in coverage.
•
Reduced power consumption.
•
Better signal reproduction.
•
Reduced influence of metals.
•
Reduced risk of feedback.
•
Virtually no external radiation.
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