The sources of radiated EMI can be broadly classied into three
types: 1) Hand-held portable transceivers. (normally with antenna
mounted on the device) 2) Medium-range mobile transceivers,
such as those used in police cars, re trucks, ambulances and
taxis. (normally with antenna mounted on the vehicle) 3) Long-
range transmitters and transceivers, such as commercial broad-
cast transmitters (radio and TV broadcast antenna towers) and
amateur (HAM) radios.
Other types of hand-held devices, such as cordless phones, lap-
top computers, AM/FM radios, TV sets and small appliances such
as electric shavers and hair dryers are usually not likely to cause
EMI problems.
Rev. A, English 13
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