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Friday, March 21, 2014

What is a Transponder?

They are also used to measure distance by calculating the elapsed time between the sending of the interrogator signal and the receipt of the transponder's signal. For example, sonar devices are used to mark underwater positions, calculate depth, and trace positions.
It may sound as if this is a technology that the average consumer never uses, but even if that was once the case, it no longer is. The modern commuter probably has at least one transmitter in his car, probably mounted on the windshield or dashboard. These are for roads that use electronic tolling systems that compute the amount of tolls to be paid and complete the transaction without requiring the driver to so much as lower his window. Some newer cars are also equipped with ones that operators can use to locate the vehicle in the event of an emergency. Cellular phones use a similar, albeit smaller, chip to send the phone's location if it used to call an emergency number.
Even casual television viewing often involves the use of these devices. A network can uplink its ground-based satellites to communications satellites orbiting the Earth, send multiple channels of digitally compressed video and audio to a single transponder aboard it, and local stations can then pick up the program and re-broadcast it locally by aiming the appropriate ground-based dish.
They are also used to measure distance by calculating the elapsed time between the sending of the interrogator signal and the receipt of the transponder's signal. For example, sonardevices are used to mark underwater positions, calculate depth, and trace positions.
It may sound as if this is a technology that the average consumer never uses, but even if that was once the case, it no longer is. The modern commuter probably has at least one transmitter in his car, probably mounted on the windshield or dashboard. These are for roads that use electronic tolling systems that compute the amount of tolls to be paid and complete the transaction without requiring the driver to so much as lower his window. Some newer cars are also equipped with ones that operators can use to locate the vehicle in the event of an emergency. Cellular phones use a similar, albeit smaller, chip to send the phone's location if it used to call an emergency number.
Even casual television viewing often involves the use of these devices. A network can uplink its ground-based satellites to communications satellites orbiting the Earth, send multiple channels of digitally compressed video and audio to a single transponder aboard it, and local stations can then pick up the program and re-broadcast it locally by aiming the appropriate ground-based dish.
http://www.wisegeek.org/what-is-a-transponder.htm#
Transponder Requirements on wiseGEEK:
  • Using distance measuring equipment requires the space between the aircraft and the ground station to be unobstructed. This requirementallows stations far apart from one another to operate on the same frequency without interference.
  • An appliance like a dishwasher, for example, may be programmed to complete 20 or more functions dependent on the user’s everydayrequirements, and each separate phase that it enters is activated by an electrical charge.

  • Transponder Equipment on wiseGEEK:
    • There are a number of ways to bypass transponders, however, most of which can be done with inexpensive equipment. Technology In vehicular-use transponder keys, introduced in 1995, the transmitter unit consists of a small microchip in the plastic part of a key.
    • Despite the potential benefits to supply chain management, transportation, payment systems, and other areas, there are potential problems with RFID transponders. Many people have raised concerns over security issues, especially in cases where an RFID transponder may be used to identify a person.

    • Aircraft Transponder on wiseGEEK:
      • The first use of a transponder was on an aircraft during World War II, as part of the Identify Friend or Foe (IFF) system.
      • Another limitation of distance measuring equipment is that ground-based stations are only capable of supporting a predetermined number ofaircraft. Transmitters will evaluate each interrogation signal based on its strength, granting priority to the closest aircraft.

      • Transponder Car on wiseGEEK:
        • Other Uses of the Technology Besides being used to start carstransponder technology can also be found in a variety of other applications.
        • They are also used to measure distance by calculating the elapsed time between the sending of the interrogator signal and the receipt of thetransponder's signal. For example, sonar devices are used to mark 

        • uTransponder Software on wiseGEEK:

          • Radio frequency identification (RFID) is a data capture technology in which identification of items is done through transponders that are attached to them. A transponder is a type of radio-relay equipment that is passive.
          • Beginning in the 1960s, aircraft began using transponders to assist in air traffic control. A transponder is both a receiver and a transmitter, which receives the radar signal from the primary radar and sends back a signal containing aircraft identification, altitude and speed information.
          nderwater positions, calculate depth, and trace positions.

        • credit/sources: http://topics.wisegeek.org/topics.htm?transponder-requirements#
        • http://topics.wisegeek.org/topics.htm?transponder-equipment#
          http://topics.wisegeek.org/topics.htm?transponder-car#
          http://topics.wisegeek.org/topics.htm?aircraft-transponder#
          http://topics.wisegeek.org/topics.htm?transponder-software#
          http://topics.wisegeek.org/topics.htm?transponder-radio#
        • All rights reserved to all photos /credit to: http://www.wisegeek.org/
@copyright do not copy/reproduce
A transponder key.

In aviation, transponders broadcast an aircraft's position and identity.

Transponders on commercial aircraft transmit their carrier and flight identification numbers to air traffic control center.

@copyright do not copy/reproduce
http://www.wisegeek.org/
My note: I  had researched due to the lost aircraft Malaysian Airlines in which I have no personal knowledge i leave it to the experts in discussing this topic..