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The green IDENT button is marked "ID". A transponder (short for trans mitter-res ponder [ 1 ] and sometimes abbreviated to XPDR, [ 2 ] XPNDR, [ 3 ] TPDR [ 4 ] or TP [ 5 ] ) is an electronic device that produces a response when it receives a radio-frequency interrogation.
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 operating modes: Off, Standby, On ...
Unmanned aerial vehicle in all classes of airspace and when instructed to enable transponder. [6] 7001 France: Used in some countries to identify VFR traffic. UK: Sudden military climb out from low-level operations. [2] 7004 UK: Aerobatic and display code in some countries. [2] 7100, 7200, 7300 US: External ARTCC subsets.
When the transponder receives an interrogation request, it broadcasts the configured transponder code (or "squawk code"). This is referred to as "Mode 3A" or more commonly, Mode A. A separate type of response called "Ident" can be initiated from the airplane by pressing a button on the transponder control panel.
Another type of transponder occurs in identification friend or foe (IFF) systems in military aviation and in air traffic control secondary surveillance radar (beacon radar) systems for general aviation and commercial aviation. [7] Primary radar works best with large all-metal aircraft, but not so well on small, composite aircraft. Its range is ...
President Joe Biden signed an executive order on Tuesday to provide federal support to address massive energy needs for fast-growing advanced artificial intelligence data centers, the White House ...
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.
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