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  2. Signal-to-noise ratio - Wikipedia

    en.wikipedia.org/wiki/Signal-to-noise_ratio

    This way the noise covers a bandwidth that is much wider than the signal itself. The resulting signal influence relies mainly on the filtering of the noise. To describe the signal quality without taking the receiver into account, the optical SNR (OSNR) is used. The OSNR is the ratio between the signal power and the noise power in a given bandwidth.

  3. List of built-in iOS apps - Wikipedia

    en.wikipedia.org/wiki/List_of_built-in_iOS_apps

    Calculator is a basic calculator app introduced with the initial launch of the original iPhone and iPhone OS 1 in 2007. [8] The standard mode includes a number pad, buttons for adding, subtracting, multiplying, and dividing. The app also contains a scientific calculator, with support for exponents and trigonometric functions.

  4. File:Smartphone camera controls popularized by iOS 7 (added ...

    en.wikipedia.org/wiki/File:Smartphone_camera...

    English: Over the years, several other vendors than Apple have implemented the same layout into their camera software. Added width for embedding. Added width for embedding. Date

  5. Bandwidth (signal processing) - Wikipedia

    en.wikipedia.org/wiki/Bandwidth_(signal_processing)

    The Rayleigh bandwidth of a simple radar pulse is defined as the inverse of its duration. For example, a one-microsecond pulse has a Rayleigh bandwidth of one megahertz. [1] The essential bandwidth is defined as the portion of a signal spectrum in the frequency domain which contains most of the energy of the signal. [2]

  6. Measuring network throughput - Wikipedia

    en.wikipedia.org/wiki/Measuring_network_throughput

    The Max TCP Window size in the absence of TCP window scale option is 65,535 bytes. Example: Max Bandwidth = 65,535 bytes / 0.220 s = 297886.36 B/s * 8 = 2.383 Mbit/s. Over a single TCP connection between those endpoints, the tested bandwidth will be restricted to 2.376 Mbit/s even if the contracted bandwidth is greater.

  7. FaceTime - Wikipedia

    en.wikipedia.org/wiki/FaceTime

    FaceTime supports any iOS device with a forward-facing camera and any Mac computer equipped with a FaceTime Camera. FaceTime Audio, an audio-only version, is available on any iOS device that supports iOS 7 or newer, and any Mac with a forward-facing camera running OS X 10.9.2 and later.

  8. iOS 7 - Wikipedia

    en.wikipedia.org/wiki/IOS_7

    iOS 7 introduced a complete visual overhaul of the user interface. With "sharper, flatter icons, slimmer fonts, a new slide-to-unlock function, and a new control panel that slides up from the bottom of the screen for frequently accessed settings," the operating system also significantly redesigned the standard pre-installed apps from Apple. [4]

  9. Channel capacity - Wikipedia

    en.wikipedia.org/wiki/Channel_capacity

    This is called the bandwidth-limited regime. When the SNR is small (SNR ≪ 0 dB), the capacity ¯ ⁡ is linear in power but insensitive to bandwidth. This is called the power-limited regime. The bandwidth-limited regime and power-limited regime are illustrated in the figure.