unavoidable. However, we believe that by following the warnings listed
below, your risk to EMI can be greatly minimized.
3.2 The Sources of Radiated EMI Can Be Broadly Classified into Three Types.
3.2.1 Hand-held portable transceivers (transmitter-receivers) with the
antenna mounted directly on the transmitting unit, such as citizens
band (CB) radios, walkie-talkies, security and fire or police transceivers,
cellular telephones and other personal communication devices;
Some cellular telephones or similar devices transmit signals while they are
ON, even though they are not in use.
3.2.2 Medium-range mobile transceivers used in police cars, fire trucks,
ambulances and taxis usually having the antenna mounted on the
outside of the vehicle; and
3.2.3 Long-range transmitters and transceivers, such as commercial
broadcast transmitters (radio and TV broadcast antenna towers) and
amateur (HAM) radios.
Other types of hand-held devices (cordless phones, laptop computers, AM/FM
radios, TV sets, CD players, cassette players, and small appliances such as
electric shavers and hair dryers, et cetera) so far as we know, are not likely to
cause EMI problems.
3.3 Powered Vehicle Electromagnetic Interference (EMI)
Because EM energy rapidly becomes more intense as one moves closer to
the transmitting antenna (source), the EM fields from hand-held radio wave
sources (transceivers) are of special concern. It is possible to unintentionally
bring high levels of EM energy too close to the powered vehicle's control
system while using these devices. This can affect your powered vehicle's
movement and braking. Therefore, the warnings listed below are
recommended to prevent possible interference with the control system of
the powered vehicle.
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