6
EMI WARNING
The scooters may be susceptible to electromagnetic interference (EMI), which is a kind of
interfering electromagnetic energy (EM) emitted from sources such as radio stations, TV
stations, amateur radio (HAM) transmitters, two-way radio, and cellular phones. The
interference (from radio wave sources) can cause the scooter to release its brakes, move by
itself,ormoveinunintendeddirections. Itcanalsopermanentlydamagethescooter’scontrol
system. The sources of radiated EMI can be broadly classified into three types:
1.Hand-heldportabletransceivers(transmitters-receivers)withtheantennamounteddirectly
onthetransmittingunit.Examplesinclude:citizensband(CB)radios,“walkietalkie”,security,
fireandpolicetransceivers,cellulartelephones,andotherpersonalcommunicationdevices.
NOTE!SomecellulartelephonesandsimilardevicestransmitsignalswhiletheyareON,
even when not being used.
2. Medium-range mobile transceivers, such as those used in police cars, fire trucks,
ambulances, and taxis. These usually have the antenna mounted on the outside of the
vehicle.
3. Long-range transmitters and transceivers, such as commercial broadcast transmitters
(radio and TV broadcast antenna towers) and amateur (HAM) radios.
NOTE! Other types of hand-held devices, such as cordless phones, laptop computers,
AM/FM radios, TV sets, CD players, and cassette players, and small appliances, such
as electric shavers and hair dryers, so far as we know, are not likely to cause problems
to the scooter.
Scooter 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 sources (transceivers) are of special
concern. It is possible to unintentionally bring high levels of EM energy very close to the
scooter’s control system while using these devices. This can affect scooter movement and
braking. Therefore, the warnings listed below are recommended to prevent possible
interference with the control system of the scooter.