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Old 17th Mar 2008, 14:32
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radian
 
Join Date: Feb 2006
Location: Krakow, Poland (EPKK)
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Transponder signals - mode differences
Hello there!
Could anybody explain to me what's the difference between signals from:
- A mode only capable transponder
and:
- A/C mode capable transponder set to A mode only ?

TCAS is able to track A/C transponders without altitude information but it's unable to track mode A signals. Why? What's the difference between the signals?
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