Return To Zero

from The Free On-line Dictionary of Computing (8 July 2008)

Return To Zero

   <communications> A class of encoding methods for physical
   circuits in which the carrier (current, voltage) returns to
   zero after each transmitted bit, i.e. the data is carried in
   pulse width or polarity, not in the level of the signal.

   Contrast {NRZ}.

   (1995-11-11)