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  3. Transponder - Wikipedia

    en.wikipedia.org/wiki/Transponder

    In fiber-optic communications, a transponder is the element that sends and receives the optical signal from a fiber. A transponder is typically characterized by its data rate and the maximum distance the signal can travel.

  4. List of transponder codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Transponder_Codes

    The following list shows specific aeronautical transponder codes, and ranges of codes, that have been used for specific purposes in various countries. Traditionally, each country has allocated transponder codes by their own scheme with little commonality across borders.

  5. Transponder (aeronautics) - Wikipedia

    en.wikipedia.org/wiki/Transponder_(aeronautics)

    A transponder (short for transmitter-responder and sometimes abbreviated to XPDR, XPNDR, TPDR or TP) is an electronic device that produces a response when it receives a radio-frequency interrogation. Aircraft have transponders to assist in identifying them on air traffic control radar .

  6. Aviation transponder interrogation modes - Wikipedia

    en.wikipedia.org/wiki/Aviation_transponder...

    In its simplest form, a "Mode" or interrogation type is generally determined by pulse spacing between two or more interrogation pulses. Various modes exist from Mode 1 to 5 for military use, to Mode A, B, C and D, and Mode S for civilian use.

  7. Air traffic control radar beacon system - Wikipedia

    en.wikipedia.org/wiki/Air_traffic_control_radar...

    A light aircraft transponder. The transponder has a small required set of controls and is simple to operate. It has a method to enter the four-digit transponder code, also known as a beacon code or squawk code, and a control to transmit an ident, which is done at the controller's request (see SPI pulse below). Transponders typically have 4 ...

    • List of HTTP status codes - Wikipedia
      List of HTTP status codes - Wikipedia
      wikipedia.org
  8. Equipment codes - Wikipedia

    en.wikipedia.org/wiki/Equipment_codes

    An equipment code describes the communication (COM), navigation (NAV), approach aids and surveillance transponder equipment on board an aircraft. These alphabetic codes are used on FAA and ICAO flight plan forms to aid Flight service station (FSS) personnel in their handling of aircraft.

  9. I-Pass - Wikipedia

    en.wikipedia.org/wiki/I-Pass

    Usage. An I-Pass sticker transponder, introduced in 2024, which is permanently affixed to the vehicle's windshield (the perforations in the sticker will disable the transponder if removed), and does not require replacement for battery expiration.

  10. Identification friend or foe - Wikipedia

    en.wikipedia.org/wiki/Identification_friend_or_foe

    Model XAE IFF kit, the first radio recognition IFF system in the U.S. Identification, friend or foe ( IFF) is a combat identification system designed for command and control. It uses a transponder that listens for an interrogation signal and then sends a response that identifies the broadcaster. IFF systems usually use radar frequencies, but ...

  11. ISO 11784 and ISO 11785 - Wikipedia

    en.wikipedia.org/wiki/ISO_11784_and_ISO_11785

    ISO 11784 specifies the structure of the identification code. ISO 11785 specifies how a transponder is activated and how the stored information is transferred to a transceiver (the characteristics of the transmission protocols between transponder and transceiver)

  12. Transponder (satellite communications) - Wikipedia

    en.wikipedia.org/wiki/Transponder_(satellite...

    A communications satellite's transponder is the series of interconnected units that form a communications channel between the receiving and the transmitting antennas. It is mainly used in satellite communication to transfer the received signals.