Information About Radio Range - Conrad Electronic Rm50 Bedienungsanleitung

17. Information about radio range

Range and disturbances
• The smoke detector works in the 868MHz range which is also used by other radio services.
Therefore restrictions in the operation and the range can occur through the devices which work
on the same or neighbouring frequency.
• The range stated of up to 100m is the free-field range, i.e. the range at sight contact between the
transmitter and the receiver. In practical operation, however, there are floors, walls, garages or
ancillary buildings between the transmitter and the receiver which reduce the range correspondingly.
• The effective distance which can be achieved between the transmitter (smoke detector RM50) and
receiver (alarm dialler AW50) in normal operation is very strongly dependent on the place of
mounting and the environment.
As a rule, when mounted in a family home, for example, operation should be faultless without
problems for radio reception.
Further causes for reduced range:
• high frequency disturbances of all types
• Buildings of all types and vegetation
• Conductive metals which are located in the proximity of the devices or within or close to the radio
route, e.g. radiators, metal insulation glass windows, reinforced concrete floors etc.
• influence of the radiation characteristics of the aerials through the distance of the transmitter or
receiver to the conductive areas or objects (also to the human body or floor).
• Broadband disturbances in urban areas which reduce the signal noise distance; the signal is no
longer recognised in these "noises".
• Irradiation of deficiently shielded electronic devices, e.g. computers operated openly, or similar.
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