My understanding from Avidyne, Piper, and other forums, the “standard” is subject to substantial interpretation. Thus, my IFD-540 reports “Traffic Sensor Error” whenever I’m near Class C/B airspace due to the data overload coming from the NGT-9000. http://forums.avidyne.com/forum_posts.asp?TID=849&PID=11717&SID=18629157afc9a4ab64zbfdz7ecefd5428240741&title=connecting-with-an-ngt-9000#11717
