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  2. Reflectometry - Wikipedia

    en.wikipedia.org/wiki/Reflectometry

    One application is the use of a tympanometer (a specialised acoustic reflectometer) to diagnose medical conditions of the ear. [1] Ultrasonic reflectometry: A transducer generates acoustic waves at ultrasonic frequency which propagate until they reaches the interface between the propagation medium and the sample. The wave is partially reflected ...

  3. Reflectometer - Wikipedia

    en.wikipedia.org/wiki/Reflectometer

    Some scientific instruments commonly designated reflectometer are: . Vector network analyser (VNA); Optical time domain reflectometer; Reflectometer (electronics): In electronics, a directional coupler containing matched calibrated detectors in both arms of the auxiliary line, or a pair of single-detector couplers oriented so as to measure the electrical power flowing in both directions in the ...

  4. Time-domain reflectometer - Wikipedia

    en.wikipedia.org/wiki/Time-domain_reflectometer

    A time-domain reflectometer (TDR) is an electronic instrument used to determine the characteristics of electrical lines by observing reflected pulses. It can be used to characterize and locate faults in metallic cables (for example, twisted pair wire or coaxial cable ), [ 1 ] and to locate discontinuities in a connector, printed circuit board ...

  5. Optical time-domain reflectometer - Wikipedia

    en.wikipedia.org/wiki/Optical_time-domain...

    An OTDR. An optical time-domain reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber.It is the optical equivalent of an electronic time domain reflectometer which measures the impedance of the cable or transmission line under test.

  6. Spread-spectrum time-domain reflectometry - Wikipedia

    en.wikipedia.org/wiki/Spread-spectrum_time...

    Spread-spectrum time domain reflectometry is used in detecting intermittent faults in live wires. From buildings and homes to aircraft and naval ships, this technology can discover irregular shorts on live wire running 400 Hz, 115 V.

  7. Signal reflection - Wikipedia

    en.wikipedia.org/wiki/Signal_reflection

    Time-domain reflectometer for electrical cable fault detection. Because damage to the cable can cause reflections, an instrument called an electrical time-domain reflectometer (ETDR; for electrical cables) or an optical time-domain reflectometer (OTDR; for optical cables) can be used to locate the damaged part of a cable. These instruments work ...

  8. How to measure heat correctly, according to scientists, and ...

    www.aol.com/measure-heat-correctly-according...

    In the sun, in the shade, on a rock, in a glade. For every different way there is to experience heat — in the sun, in the shade, on a rock, in a glade — there is a scientific debate about how ...

  9. Reflections of signals on conducting lines - Wikipedia

    en.wikipedia.org/wiki/Reflections_of_signals_on...

    A time-domain reflectometer; an instrument used to locate the position of faults on lines from the time taken for a reflected wave to return from the discontinuity.. A signal travelling along an electrical transmission line will be partly, or wholly, reflected back in the opposite direction when the travelling signal encounters a discontinuity in the characteristic impedance of the line, or if ...

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