Digital Cable seems to be a newer thing, which would imply cable TV up to this point has been analog. How? How can a cable accurately carry an analog signal, probably based on voltage, if cable length greatly affects voltage? Wouldn't that cause all sorts of crazy problems such as things appearing blue if the cable length is 1m but appear red if the cable length is 50m? Be a rectangle if the cable is 5m but appear as a circle at 100m? It's not too crazy to think the voltage can drop from 10V to 5V if the cable is too long. Given that analog signal requires very accurate detection, wouldn't small changes in voltage cause extreme changes in the picture? I'm still trying to wrap my head around the concept of analog. It's infinitely more complicated than digital.