The invention relates to a method for testing the real-time capacity of a system, especially a computer system, according to which a quantity of different tasks is to be executed, system costs being incurred by the execution of each task. The system may also be used to enable an individual having limited use of the upper extremities to control an electrical apparatus such as a wheelchair, a bed or a light fixture. The transceiver is adapted for bi-directional wireless communication with a remote transceiver for the transfer of control data and feedback data. The clock calibration unit may have a calibration output for outputting a calibrated clock signal. The second compressed probability table containing a plurality of probability elements. At least one of the external and internal rotors is disposed in a flux concentration.