In large power systems, the transmission lines, generators and loads are considered to be continuous functions of position and time (space). The application of the limit of zero generator internal impedance, with finite rotor inertia and zero transmission line impedance per unit length yields a nonlinear partial differential equation in time and two spatial dimensions for the rotor power angle. This model is called continuum model. Any disturbance in the system implies to electromechanical wave propagation in the system. Not only the models or simulations are sufficient for describing the power system electromechanical wave propagation; where this phenomenon needs a practical proof. The phasor measurement unit (PMU) can do that. In this paper; a complete design and realization of a PMU is implemented to detect the phenomenon. The PMU was implemented in Electrical Machines Lab. in Military Technical College, Cairo, Egypt. A photograph collection album for the preceding PMU and its laboratory realization, are presented in the figures of this paper. Also, the overall PMU circuit diagram with its components is placed in the paper articles.