If EM interferences are suspected in
a particular environment, well-designed EMC modeling tools may be used
Predict the EM risks to electronic equipment, human health and the
Evaluate the EM performance of different designs without creating
Evaluate the EM performance of a design in many different
Modeling is used in two types of scenarios:
An EMC test scenario such as a radiated emissions or radiated immunity
test is modeled and the field at an appropriate test distance is calculated.
This type of modeling is often undertaken on an intentional transmitter
to assess the likelihood of disturbance to neighboring electronic equipment
or the threat to human safety. (See this
document for more details).
Long parallel runs of cable can lead to cross-talk (the signal from
one cable interfering with the other). This can lead to unexpectedly
high voltages occurring on the "victim" cable. An example
of this when 25kV AC feeder cables used to supply power to trains. Line-side
(low-voltage) cables used for telephony and signaling purposes can have
significant voltages induced on them. The primary design objective in
this scenario is to limit the induced voltages on line side cables to
below 60V AC.