non-return to zero



  • noun a representation of binary data in which the signal changes when the data changes state, and does not return to zero volts after each bit of data.


  • A data-encoding method in which the signal does not return to a zero state between sent bits. For instance, 1s may be represented by a positive voltage and 0s by a negative voltage, with no zero-voltage condition. Timing is utilized to distinguish each bit from the next one. Used for digital data transmission. NRZ requires half of the occupied bandwidth as compared to Manchester encoding.
  • A magnetic tape recording technique which utilizes non-return to zero (1).