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  2. 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. The list is retained for historic interest.

  3. Chip timing - Wikipedia

    en.wikipedia.org/wiki/Chip_timing

    A passive transponder does not contain a power source inside the transponder. Instead, the transponder captures electromagnetic energy produced by a nearby exciter and utilizes that energy to emit a unique code. In both systems, an antenna is placed at the start, finish, and in some cases, intermediate time points and is connected to a decoder.

  4. Gillham code - Wikipedia

    en.wikipedia.org/wiki/Gillham_Code

    The transponder gets its altitude information from an encoding altimeter mounted behind the instrument panel that communicates via the Gillham code. Gillham code is a zero-padded 12-bit binary code using a parallel nine- [ 1 ] to eleven-wire interface , [ 2 ] the Gillham interface , that is used to transmit uncorrected barometric altitude ...

  5. E-ZPass - Wikipedia

    en.wikipedia.org/wiki/E-ZPass

    E-ZPass is an electronic toll collection system used on toll roads, toll bridges, and toll tunnels in the Eastern, Midwestern, and Southeastern United States.The E-ZPass Interagency Group (IAG) consists of member agencies in several states, which use the same technology and allow travelers to use the same transponder on toll roads throughout the network.

  6. Aviation transponder interrogation modes - Wikipedia

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

    Mode S transponders are compatible with Mode A and Mode C Secondary Surveillance Radar (SSR) systems. [2] This is the type of transponder that is used for TCAS or ACAS II (Airborne Collision Avoidance System) functions, and is required to implement the extended squitter broadcast, one means of participating in ADS-B systems. A TCAS-equipped ...

  7. Digital signature transponder - Wikipedia

    en.wikipedia.org/wiki/Digital_signature_transponder

    Transponder encryption keys are user programmable, using a simple over-the-air protocol. Once correctly programmed, transponders may be "locked" through a separate command, which prevents further changes to the internal key value. [4] Each transponder is factory provisioned with a 24-bit serial number and 8-bit manufacturer code.

  8. FasTrak - Wikipedia

    en.wikipedia.org/wiki/FasTrak

    State regulators later approved a phase-in of transponder technology using the ISO/IEC 18000-63 (6C) standard, which began in 2018 and is expected to end in 2024. This would allow compatibility with systems used in nearby states of Washington, Colorado, and Utah; and also Kentucky, Indiana, Georgia, North Carolina, and Louisiana, plus NationalPass.

  9. Fast Lane (electronic toll collection) - Wikipedia

    en.wikipedia.org/wiki/Fast_Lane_(electronic_toll...

    Fast Lane transponders were fully interoperable with member agencies of the E-ZPass Interagency Group, however Fast Lane transponders (or the "E-ZPass MA" replacement transponders exclusive to Massachusetts) afford users discounted tolls in some junctions that out-of-state users are not offered.