Wireless controller, a system implementing a wireless controller and a method which allows wireless control of high voltage test modules utilize wireless networking technology for the control and monitoring of High Voltage test equipment providing, for example, a completely galvanically isolated controller for High Voltage test modules. An identification is received of a set of subnet managers within the plurality of subnet managers. The method includes receiving the additional data associated with the main data, the additional data being divided into a plurality of segment units; and reproducing the additional data in a synchronous manner with the main data using time information if indication information indicates a presence of the time information. The positionvelocity detector measures a position and velocity of the spacecraft. The radial spline connection extends from the engine casing and joins with the bumper ring to permit the bumper ring to float radially with respect to the engine casing, but prevent the bumper ring from rotating circumferentially with respect to the engine-casing. The second internal conductor is connected to the first internal conductor at the end surface.