Voltage and Current Waveform Selection

An emissions Source is specified by defining properties of the circuit's time domain Voltage waveform, its time domain Current waveform, or both.

To define a voltage waveform the None checkbox adjacent to the Voltage option button must be clear.  Checking the None checkbox adjacent to the Voltage option button tells EMI Analyst the Source will be defined by the Current waveform only. 

Similarly, to define a current waveform the None checkbox adjacent to the Current option button must be clear.  Checking the None checkbox adjacent to the Current option button tells EMI Analyst the Source will be defined by the Voltage waveform only.

If a Current waveform is defined by the user, its corresponding current spectrum defines the differential mode current spectrum for the conducted emissions or radiated emissions analysis, independent of the Filter, Conductor, and Load impedances.

If a Current waveform is not defined by the user, the differential mode current spectrum is defined by the Voltage waveform and its corresponding voltage spectrum, and the impedance of the Filter, Conductors, and Load.

If a Voltage waveform is defined by the user, its corresponding voltage spectrum defines the common mode current spectrum for the conducted emissions or radiated emissions analysis.

If a Voltage waveform is not defined by the user, the common mode current spectrum is defined by the Current waveform and its corresponding current spectrum, and the impedance of the Filter, Conductors, and Load.

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Time Domain Waveforms