Installation, Setting Up And Use; Planning The Infrared Field - Beyerdynamic IRIS Notice D'utilisation

IRIS – Iris EF Digital Infrared Radiator
4.2

Installation, setting up and use

4.2.1 Planning the infrared field

In order to achieve an optimum signal transmission, the room occupied by the delegates with their
portable devices has to have uniform infrared coverage. The size and number of the radiators has to be
determined, as well as their position and direction in the room.
The radiators are connected in a daisy chain to the control unit on the signal side.
When planning an infrared field, a distinction must be made between:
• Equipping smaller rooms and the temporary installation of an Iris system
• Permanent installation of Iris systems in medium-sized conference rooms and large halls
In the case of the permanent installation of an Iris system, the economic use of materials is a primary
consideration. In other words, the layout and dimensions of radiators must be optimised in line with
local conditions to ensure that an infrared field is produced that meets the predefined quality
requirements whilst ensuring economy of both energy and materials. For this reason, any permanent
installation requires detailed planning and, if possible, use of a CAD program to simulate the infrared
field.
The following information refers to the on-site planning of an infrared field for equipping smaller rooms
and for temporary rental installations.
When planning an infrared field, sufficient information regarding local conditions must be available,
namely
• The number of channels to be transmitted
• The dimensions of the room and the size of the planned infrared field
• The seating arrangement
• The possible points for installing radiators and their height
• Lighting conditions (glazed window areas, lamps)
• Surfaces of walls, ceilings and floors, curtains
• Sources of electrical interference
Any infrared field that is planned and installed according to these instructions must have the following
characteristics:
• In every part of the field, it must be possible to receive the audio signal with a signal-to-noise ratio of
at least 40 dB (with Iris RP receivers).
• The seating arrangements must be considered. In other words, the radiators must be mounted in such
a way that delegates do not shield their receivers from the infrared light with the shadows cast by
their own bodies. All the figures for the range of radiators given below are based on the reception
quality defined here, i.e. at least 40 dB signal-to-noise ratio.
• The range of the radiators is greater the fewer channels they transmit (the range of the radiators is
inversely proportional to the number of channels they transmit).
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