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restricted by other equipment operating on the same or a similar
frequency. The stated range of up to 100 m is the maximum
free-field range (i.e. the line-of-sight range between transmitter
and receiver). In everyday use, however, the range will inevitably
be reduced accordingly due to obstacles such as walls, ceilings
and so on.
The following factors can also reduce the range:
• Any type of high-frequency interference.
• Any type of building structure or vegetation.
• Electrically conducting components in the vicinity of wire-
less devices and/or within or near to the wireless transmis-
sion path that can distort and weaken fields.
• The distance between the transmitter or receiver and
conducting surfaces or other objects (including the human
body or the ground) influences the radiation pattern of the
antennae and therefore the range.
• Broadband interference in urban areas can reach levels that
reduce the signal-to-noise ratio, which in turn reduces the
range.
• Radiation from poorly shielded computers can reach the
receiver and reduce the range.
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