Loading...

with the null or the point where the AC signal goes to zero to interject data, but how are they doing that on a DC connection? Well, there's probably a lot of people out there who know more about it, but we used to use, in the utility business, we used to use power line carrier, we still use power line carrier, which has an alternating current system, alternating voltage system. But the power line carrier that we used to keep with protection relays and send signals down lines, we used to do a lot of energy conservation monitoring via power line carrier with all, well, higher frequencies stand among the same conductors. So it was AC signals, superimpose on AC signals. On the DC system, I would think it's even simpler because you don't have free signal