Noise-domain reflectometry

Noise-domain reflectometry is a type of reflectometry where the reflectometer exploits existing data signals on wiring and does not have to generate any signals itself.[1] Noise-domain reflectometry, like time-domain and spread-spectrum time domain reflectometers, is most often used in identifying the location of wire faults in electrical lines.

Time-domain reflectometers work by generating a signal and then sending that signal down the wireline and examining the reflected signal.[2] Noise-domain reflectometers (NDRs) provide the benefit of locating wire faults without introducing an external signal because the NDR examines the existing signals on the line to identify wire faults. This technique is particularly useful in the testing of live wires where data integrity on the wires is critical. For example, NDRs can be used for monitoring aircraft wiring while in flight.

See also

References

  1. ↑ Lo, Chet and Furse, Cynthia (February 2005). "Noise-Domain Reflectometry for Locating Wire Faults" (PDF). IEEE Transactions on Electromagnetic Compatibility (via livewiretest.com) 47 (1). Archived from the original (PDF) on 2010-07-03. Retrieved April 4, 2013.
  2. ↑ Smith, Paul; Furse, Cynthia; Gunther, Jacob (December 2005). "Analysis of Spread Spectrum Time Domain Reflectometry for Wire Fault Location" (PDF). IEEE Sensors Journal (via livewiretest.com). Archived from the original on April 4, 2013. Retrieved April 4, 2013.
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