APT-5 - User’s Manual (EU) Rev. 2020-01 en
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SECTION B – USER INFORMATION
12
EMI – ELECTROMAGNETIC INTERFERRENCE
CAUTION: It is important that you read this information regarding the possible effects of
electromagnetic interference on your APT-5.
Electromagnetic Interference (EMI) From Radio Wave Sources
The equipment may be susceptible to electromagnetic interference (EMI), which is
interfering electromagnetic energy (EM) emitted from sources such as radio stations, TV
stations, amateur radio (HAM) transmitters, two-way radios, and cellular phones. The
interference (from radio wave sources) can cause the equipment to come to a sudden
stop, or react in an uncontrolled manner. It can also permanently damage the equipment’s
control system.
There are a number of sources of relatively intense electromagnetic fields in the
everyday environment. Some of these sources are obvious and easy to avoid. Others
are not apparent and exposure is unavoidable. However, we believe that by following
the warnings listed below, your risk to EMI will be minimized.
The sources of radiated EMI can be broadly classified into three types:
1. Hand-held portable transceivers
(transmitters-receivers) with the antenna mounted
directly on the transmitting unit. Examples include citizens band (CB) radios, “walkie-
talkies”, security, fire, and police transceivers, cellular telephones, and other personal
communication devices.
**NOTE:
Some cellular telephones and similar devices transmit signals while they are
ON, 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; and
3. Long-range transmitters and transceivers
, such as commercial broadcast transmitters
(radio and TV broadcast antenna towers) and amateur (HAM) radios.
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