Channel time calibration means

A data transmission apparatus for high-speed transmission of digital data comprising

• a communicational channel between at least one transmitter having one or more registers for transmitting a signal along the communication channel, and at least one receiver having one or more registers for receiving the signal;
• a main clock for generating a main clock signal for said transmitter's register(s);
• and a reference clock for generating reference signals for calibrating said receiver's register(s);
• said reference clock being associated with said main clock;
• a means for measuring time offsets between different signals that form the communication channel, at different frequencies, and/or for different data patterns transmitted through the channel;
• a storage means for recording and storing the measured time offsets;
• and
• a timing correction means for applying the measured time offsets to compensate for inter-signal skew by performing relative alignment of the measured offsets to the main clock edge.