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  2. 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 ...

  3. 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 ...

  4. 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 ...

  5. Refractometer - Wikipedia

    en.wikipedia.org/wiki/Refractometer

    Hand-held refractometer. A refractometer is a laboratory or field device for the measurement of an index of refraction (refractometry).The index of refraction is calculated from the observed refraction angle using Snell's law.

  6. 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.

  7. Your car insurance company wants your data. Is it worth the ...

    www.aol.com/finance/car-insurance-company-wants...

    According to the website, DriveEasy uses eight factors to calculate a driving score: distracted driving, braking and acceleration, cornering, smoothness, time of day, distance driven, route ...

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

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

    Nearby, Sina Sedaghat, another Ph.D student of Sailor's, used the lab's $50,000 reflectometer to measure thermal emittance. For a spot of concrete in the sun, it showed a value of 0.26. An ...

  9. 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 ...