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16. Transmission range
• The FS20 radio switching system 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 specified range of up to 100m is the so-called free field range, i.e. the range
within visible contact between the transmitter and receiver. In practical operation,
however, there are walls, the ceilings of rooms etc. between the transmitter and
the receiver which reduce the range correspondingly.
Please note:
Do not position several radio receivers right next to each other as
these may influence each other (minimum distance 0.2 m, we
recommend 0.5 m or more).
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 interference in urban areas which reduce the signal noise distance;
the signal is no longer recognised in this "noise".
• irradiation of deficiently shielded electronic devices, e.g. computers operated
openly, or similar.
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