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Hi all,

So, I'm trying to inject a 150khz sinus, 80% sine modulated at 1khz for EMC simulation. (as specified by EN61000-4-6 (conducted immunity))

How can I modulate a Voltage function generator for simulation purpose?

Generating a freq domain simulation with a non-modulated frequency works fine, but I also need to see the behavior when modulated.

Is this doable?

You set me off on a bit of a study of amplitude modulation, see https://www.circuitlab.com/circuit/79h84755nmqq/modulation-exp/ for the result. I'm not sure what you mean by "sinus" nor "EMC" so definitions of those terms would help.

Hi,

This looks to be exactly what I was looking for. Very useful!

Sinus is Swedish for "Sine" sorry about that. I know sinus can be a very different thing in English. :)

EMC it short for Electro Magnetic Compatibility, and EN61000-4-6 is a common standard in EU for this.

Thank you very much, now I will be able to re-run my earlier (simpler) simulations. :)

I'm still working on this and chasing through old text books so there may be a few changes in the future. The big difference I've found so far is that the most comprehensible reference I have is in terms of cosines, not sines so I have to look at that. We studied it in university back in the mid 50's and I haven't touched it since.