Transient occur power and signal line in a car, it can be discriminated inductive load, load dump, transient waveform which occur as a result of supply voltage reduction of the switching processes. The conventional methods for electromagnetic immunity are adding capacitor, inductor or TVS in power and signal lines. This technique will help EMC engineers to build the  equivalent circuit model of transient to estimate the transient before testing or without facilities.  It also could make numerical analysis and improve the EMC performance after testing.

1. Applicable range: transient waveform in car environment
2. Testing facilities: transient waveform generator、EMC shielding room
3. Transient waveform debug component: capacitor、zener diode、MOVs、TVS
4.Transient waveform monitoring: oscilloscope