yes thatīs right, it appears in yellow saying how many miles is from you "2.3 nm" but no altitude indication, so it should be normally below (in other airspace) but i was trying to find somewhere if i should deviate from the horizontal navigation.
between a "mode a" and a "full tcas" equipment there is a TA nothing else of course.
but i am still on doubt of the correct procedure. thanks for your answers