A method of preparing data streams to facilitate seamless switching between such streams by a switching device to produce an output data stream without any switching artifacts. The lock pin in its unlocked state is rotated by being pressed by the large-diameter disc, and, after the largest dimensioned portion of the large-diameter disc passes over the disc detecting lever, the lock plate returns to its original position to lock the lock pin in its falling-down state. Further, antibodies against the expressed DNA sequences and other compounds reactive with the expressed DNA sequence are also part of the invention. When a potential locked condition in a first motor is detected, the DC bus is energized with an initial voltage using an alternate source of power.