SIwave far field simulation results
I am trying to use ANSYS SIwave for EMI/EMC testing of my PCB. I have the following questions which don't seem to be covered in the tutorials: -
1) Suppose I am working with +5V, +12 V and +18 V on my board which are supplied through pin headers. And I have 2 components which use the +12 V say - a voltage regulator and a PWM IC VCC supply. Do I have to keep the pin header and regulator BOTH as a voltage source and PWM IC as a current source?
2) When I make a far-field computation using the Far Field simulation tool, it gives me several results. What is the Y axis representing in this plot?
dB(MaxETotal)? Why is it dB? My sweep range is 150kHz to 30MHz.