This manual is intended for use by installation engineers.
The separate user manual should be left with the user.
Infrared Wireless Microphone
Technology:
As the Systems use wireless infrared to transmit the user’s
voice, some understanding of how this operates is useful...
Infrared is simply invisible light and acts in a very similar way
to ordinary light, a useful feature in classroom applications.
For example, infrared recognises walls as boundaries so
multiple systems can be used without problems.
Whilst it is true that IR can be directional, all our emitters
use high power LED arrays and detectors are wide angle.
Infrared also readily re
fl
ects from walls, ceilings and windows
so full coverage is easily achievable. Frequency allocation
problems are eliminated and any transmitter can be used
with any receiver; as a result these systems are both easy
to commision and very
fl
exible in use.
Infrared Wireless Microphone Technology
AC Power Requirements:
Pack A, B, and C Systems:
A single 13 amp power point is all that is required
as all ancillary Sound
fi
eld system items are powered
directly from the panel ampli
fi
er. If two speakers are
required, a further slave Sound Panel (set to 8 ohms)
can be connected to the extension speaker terminals
of the Panel Amp (see page 10
for connection details).
Pack F & G Surface-mount Systems:
A single 13 amp power point is all that is required
as all ancillary items are powered from the IRX
Receiver/Ampli
fi
er.
5
Cable Requirements:
Mains & Audio:
All mains supply cables (terminated with 13 amp UK plugs) are included with kits,
as are the interconnection cables between the infrared receiver and ampli
fi
er.
Infrared Receiver and External Detectors:
Two ready-terminated 10 metre coaxial extension cables are provided for the
connection of the extension IS-20A infrared detectors. If required, these can be
extended to 20 metres by means of a further extension cable and male-to-male
coupler. (The Pack F System is supplied with 3 extension cables and a
male-to-male coupler). For distances of over 20 metres please consult
our technical support team.
