Information detecting system

A system for detecting information in a train of signals, said signals in said train having pairs of associated transitions therein;

• said system comprising:
• means for detecting said transitions in said signals in said train;
• means for generating a first window signal associated with the first one of a pair of associated transitions and for generating a second signal, associated with the second of said one pair of associated transitions;
• each of said first and said second window signals having a nominal size;
• decoding means responsive to said transitions in said signal train and to said window signals;
• means, connected to said detecting means and said generating means, for examining said transition signals during the occurrence of said first and second window signals to detect associated transitions in said pairs of transitions;
• and
• means connected to said examining means, for adjusting the size of said first and said second window signals from said nominal size in dependence upon the time of occurrence of said transitions relative to said window signals.