I want to build a data acquisition device to collect electromagnetic interference signatures of household appliances on the home electrical network (power line). In fact I hope to harvest datasets similar to the ones presented in this competition.
I want to build a power line interface like this one described in the paper titled "An In Depth Study into Using EMI Signatures for Appliance Identification".
Now I seemed to have stumbled right at the start: I live in Belgium and unlike other parts of the world we have no Neutral in the mains network (single phase): we have two phases and we have 220V between the two. How should I modify this wiring diagram so that there is a high pass filter on both of the phases and make sure I don't fry the spectrum analyzer?