So how does the pilotaware know which signal to ignore if using the mode-c +filter setting if the user has a mode-c transponder?
Aaah, now that would be a trade secret, and took a long time to work out
In simple terms, it learns, from your flight profile
It does get fooled sometimes, for example
very steep climb descent
Pressure differential between cabin and outside
Long periods of no ground interrogation
Thx
Lee