Digital signal transmission apparatus e.g. for computer tomography equipment slip ring, has control unit in transmitter for controlling signal amplitude to give required parameters

摘要

The apparatus transmits signals between units moving along predetermined paths, by coupling signals from a transmitter (2) into conductors for carrying electrical signals along the path, and evaluating the signals at a receiver (3). A control unit (5) is provided in the transmitter for controlling the signal amplitude of the transmitter in accordance with predetermined parameters. The conductors are preferably a slip-ring arrangement for use in computer tomography equipment. The signal amplitude may be controlled to give a constant received amplitude, a constant signal-noise ration or constant bit-error rate.