A system and method for controlling a digital TV, the system including the DTV; and a 3D pointing device. The apparatus includes a stationary frame, a first longitudinal rail supported, at least partially, by the frame, and a second longitudinal rail also supported, at least partially, by the frame and in generally parallel relation with the first rail. The elevator car is dispatched to the requested destination during a trip that begins at a time that corresponds to or is after the actual arrival time. Further, the magnetic field distribution may include at least two components substantially orthogonal to one another lying in one or more planes perpendicular to the axis of rotation. Upon receiving a request for the file, a download application associated with the signal generator retrieves the encrypted file, decrypts the file and compares one or more keys stored within the signal generator with the code to determine whether the signal generator is allowed to download the waveform. The enclosures have one or more arc-resistant features, including arc channels, arc fault dampers, and arc fault plenums.