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  2. USB communications - Wikipedia

    en.wikipedia.org/wiki/USB_communications

    Connect USB device pulls up either D+ or D− to wake the host from the detached line state. This starts the USB enumeration process. This sets the idle state. D− pull-up D+ pull-up As full speed, then chirp in reset: Idle / J Host and device transmitter at Hi-Z. Sensing line state in case of detached state. As detached or connect state. Sync

  3. Cable fault location - Wikipedia

    en.wikipedia.org/wiki/Cable_fault_location

    Murray loop test employs the principle of wheatstone bridge for locating the fault. To perform this test, it is necessary to have a sound cable running alongside the faulty cable. One end of the faulted cable is connected through a pair of resistors to the voltage source. Also a null detector is connected. The other end of the cable is shorted.

  4. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    Low-density parity-check (LDPC) codes are a class of highly efficient linear block codes made from many single parity check (SPC) codes. They can provide performance very close to the channel capacity (the theoretical maximum) using an iterated soft-decision decoding approach, at linear time complexity in terms of their block length.

  5. USB-to-serial adapter - Wikipedia

    en.wikipedia.org/wiki/USB-to-serial_adapter

    FTDI US232R : USB to RS-232 cable. A USB-to-serial adapter or simply USB adapter is a type of protocol converter that is used for converting USB data signals to and from serial communications standards (serial ports). Most commonly the USB data signals are converted to either RS-232, RS-485, RS-422, or TTL-level UART serial data.

  6. Blue screen of death - Wikipedia

    en.wikipedia.org/wiki/Blue_screen_of_death

    systemd, a software suite providing system components for Linux operating systems, implements a blue screen of death similar to that of Microsoft Windows using a systemd unit called systemd-bsod since August 2023, which was fully added on December 6, 2023 starting with version 255 of systemd. [38]

  7. Apple Pippin - Wikipedia

    en.wikipedia.org/wiki/Apple_Pippin

    This led to a short-lived, last resort attempt to market the Pippin as an all-in-one set-top box, but this approach failed. [38] Bandai pulled the @WORLD out of the American market, and shipped the unsold units back to Japan. [38] The black-colored units were re-branded ATMARK (without the ATMARK labeling on the front) and sold in the Japanese ...

  8. Electrical fault - Wikipedia

    en.wikipedia.org/wiki/Electrical_fault

    The Murray loop and the Varley loop were two types of connections for locating faults in cables Sometimes an insulation fault in a power cable will not show up at lower voltages. A "thumper" test set applies a high-energy, high-voltage pulse to the cable. Fault location is done by listening for the sound of the discharge at the fault.

  9. DisplayPort - Wikipedia

    en.wikipedia.org/wiki/DisplayPort

    DisplayPort connector A DisplayPort port (top right) on a laptop from 2010, near an Ethernet port (center) and a USB port (bottom right). DisplayPort (DP) is a proprietary [a] digital display interface developed by a consortium of PC and chip manufacturers and standardized by the Video Electronics Standards Association (VESA).