So, a larger amplitude signal will be less affected by noise. And digitizing at the source will eliminate any noise issues. This is Anita Flynn 's favorite issue. She always said that robotics was a connector problem. And she was right.
Connectors can be a real pain in the ass.
Actually the problem has to do with the connectors themselves and the associated cables. In a robot there is a need to bring signals from one part of the robot to the other. Each wire or cable which does this has the potential of failing in every way that Murphy imagined possible. A large number of wires can also increase the complexity of assembling the robot. Also large numbers of wires are hard to route neatly, meaning that signal wires may end up near power carrying wires and noise can become a problem.