General Information On Radio Operation - M-E ODYON pro HS1 Instruction Manual

GENERAL INFORMATION ON RADIO OPERATION

The radio transmission is realised on a non-exclusive transmission path, which is
why interference cannot be ruled out. Further interference can be caused by
switching operations, electric motors or defective electrical appliances. The range
in buildings can deviate greatly from that in the free field. Apart from the trans-
mitting power and the receiving characteristics of the receiver, environmental
influences such as air humidity play an important role in addition to structural
conditions on site. The ODYON handheld transmitters are designed for ranges of
several hundred metres under optimal conditions. However, the maximum range
is only achieved when there is visual contact with the receiver and no high-fre-
quency interference.
Possible causes for reduced range are:
• Buildings of any kind or vegetation affect the range.
• The distance of the antenna to the body, as well as to other conductive surfaces
or objects.
• The "background noise" in non-rural areas can already be relatively high,
reducing the signal-to-noise ratio and thus the range.
• Similarly, it is not impossible that devices with similar operating frequencies
may be operating in the neighbourhood, making the receiver seemingly less
sensitive.
• If the receiver is located in the vicinity of poorly shielded devices that produce
interference radiation (e.g. PCs), the range may also be severely reduced.
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