Laboratory Exercises to Accompany Chapters 7-9
These demonstrations and laboratory exercises illustrate concepts described in Electromagnetic Compatibility Course Notes.
Chapter 7: Measuring Common-Mode and Differential-Mode Signals
Illustrates that mode conversion is not due to imbalance, but rather it is due to changes in electrical balance.
Laboratory Exercise 16: Measuring Common-Mode and Differential-Mode Signals
Chapter 7: Mode Conversion due to Changes in Electrical Balance
Is it better to route high-speed signals on microstrip traces or differential trace pairs? The answer depends on the nature of the signal source and termination.
Laboratory Exercise 17: Mode Conversion Due to Changes in Electrical Balance
Chapter 7: Mode Conversion due to Changes in Electrical Balance in Cables
Is it better to route high-speed signals on coaxial cables or twisted-wire-pairs? Again, the answer depends on the nature of the signal source and termination.
Laboratory Exercise 18: Mode Conversion Due to Changes in Electrical Balance 2
Chapter 7: Numerical Modeling of Balanced and Unbalanced Transmission Lines
Differential currents in a transmission line (balanced or unbalanced) do not cause significant radiated emissions. Numerical modeling tools help to demonstrate that the common-mode transmission line currents responsible for radiated emissions are generated by changes in the electrical balance.
Laboratory Exercise 19: Numerical Modeling of Balanced and Unbalanced Transmission Lines
Chapter 8: Ground vs. Current Return
Safety ground and signal ground are not the same thing, but sometimes they share the same conductors. Making good measurements involves understanding where both the high- and low-frequency currents are flowing.
Laboratory Exercise 20: Current in Ground Conductors
Chapter 9: Designing and Building a Low-pass Filter
At high frequencies, a filter will perform very differently than the SPICE models indicate. At high frequencies, component placement is just as important as component selection.
Laboratory Exercise 21: Designing and Building a Low-pass Filter
Chapter 9: Designing and Building a Common-mode Filter
Common-mode filter design starts with defining the common-mode that you are trying to filter.
Laboratory Exercise 22: Designing and Building a Common-Mode Filter