A non-invasive Time Domain Reflectometry transmission line system and method for measuring one or more parameters of an electromagnetic Radio Frequency pulse transmitted, and reflected, along a transmission line, the parameters including at least one of; amplitude, propagation velocity and/or propagation time between defined predetermined instances. The system includes a transmission line structure including three or more elongated transmission elements each having two distal ends. Each element is capable of being selectively activated in at least two distinct pairs having distinct geometric configurations relative to each other to generate at least two distinct electric field potentials without physical displacement of the transmission line.