For what it is worth in the rf world (and probably the whole “physical layer” space) you want to avoid a DC bias on your line. Otherwise you are gonna be pullin

For what it is worth in the rf world (and probably the whole “physical layer” space) you want to avoid a DC bias on your line. Otherwise you are gonna be pulling a current in one direction. To do this you want to make sure that the flow of electrons alternates roughly 50% of the time. You can accomplish this with all kinds of “data whitening” schemes like the one the parent describes.