Range, Reception Problems - Conrad PS55 Bedienungsanleitung

13. Range, reception problems

The product works in the 868MHz range, which is also used by other radio services. This is
why there may be a restrictive operation and range due to devices that work on the same or
a neighboring frequency.
The specified range of up to 100 m is the so-called free field range, i.e. the range within visible
contact between the transmitter and receiver. But in practice, walls, ceilings etc. between the
transmitter and receiver may affect and reduce the range.
In case of reception problems, turn the receiving station a little until the data of the sensor are
received again. If necessary, change the place of installation of the receiving station or reduce
the distance between receiver station and sensor.
However, reception problems can also occur if the distance between sensor and receiving
station is smaller than 1 m.
Other causes for reduced ranges:
• High frequency interferences of all sorts
• Any kind of construction and vegetation
• Conductive metal parts which are located near the devices or within or near their
transmission path, e.g. heaters, metallized insulation glass windows, reinforced concrete
ceilings etc.
• There is an influence on the radiation pattern of antennas due by the distance from
transmitter or receiver to conductive surfaces or objects (to human bodies or ground also)
• Broadband interference in urban areas which reduces the signal-to-noise-ratio; the signal
will no longer be recognized due to this "noise".
• Devices with neighboring operation frequencies e.g. audio radio transmission devices
• Interference radiation resulting from insufficiently shielded electronic devices, e.g. turned-
on computers or the like.
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