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  2. Optical power meter - Wikipedia

    en.wikipedia.org/wiki/Optical_power_meter

    Typical test automation features usually apply to loss testing applications, and include: The ability to set the unit to read 0 dB at a reference power level, typically the test source. The ability to store readings into internal memory, for subsequent recall and download to a computer.

  3. Diagnostic program - Wikipedia

    en.wikipedia.org/wiki/Diagnostic_program

    A diagnostic program (also known as a test mode) is an automatic computer program sequence that determines the operational status within the software, hardware, or any combination thereof in a component, a system, or a network of systems. Diagnostic programs ideally provide the user with guidance regarding any issues or problems found during ...

  4. Power-on self-test - Wikipedia

    en.wikipedia.org/wiki/Power-on_self-test

    Using a logic analyzer or a dedicated POST card‍—‌an interface card that shows port 0x80 output on a small display‍—‌a technician could determine the origin of the problem. Once an operating system is running on the computer the code displayed by such a board may become meaningless, since some OSes, e.g. Linux , use port 0x80 for I ...

  5. Lumen maintenance - Wikipedia

    en.wikipedia.org/wiki/Lumen_maintenance

    Lumen maintenance is the most useful gauge to determine the lifetime or useful light output rating of an LED light source. Unlike traditional light sources such as incandescent lamps, LEDs rarely fail outright and instead continue to emit light, albeit at slowly diminishing rate over time. [ 1 ]

  6. Photometry (optics) - Wikipedia

    en.wikipedia.org/wiki/Photometry_(optics)

    The lumen is the photometric unit of light output. Although most consumers still think of light in terms of power consumed by the bulb, in the U.S. it has been a trade requirement for several decades that light bulb packaging give the output in lumens.

  7. Booting process of Windows - Wikipedia

    en.wikipedia.org/wiki/Booting_process_of_Windows

    When a user is logging on to Windows, the startup sound is played, the shell (usually EXPLORER.EXE) is loaded from the [boot] section of the SYSTEM.INI file, and startup items are loaded. In all versions of Windows 9x except ME, it is also possible to load Windows by booting to a DOS prompt and typing "win".

  8. Pin AOL.com to your Windows 10 Start menu - AOL Help

    help.aol.com/articles/how-to-pin-aol-com-to-your...

    Your pinned tiles can be found in the right panel of your Start menu. Just click the tile to open up the website on Edge. Open Microsoft Edge. In the address bar, go to the AOL homepage. In the upper right, click the More icon | select Pin this page to Start. Click Yes to confirm.

  9. Luminous efficacy - Wikipedia

    en.wikipedia.org/wiki/Luminous_efficacy

    The luminous efficacy of the source is a measure of the efficiency of the device with the output adjusted to account for the spectral response curve (the luminosity function). When expressed in dimensionless form (for example, as a fraction of the maximum possible luminous efficacy), this value may be called luminous efficiency of a source ...