In the movies, especially the first. Dutch and his team look directly at the Predator a few times in the beginning, and fail to see it. Its not till they are aware that something is out there. That they begin to look harder and spot the Predator.
This should be the way it works in the game. The FT shouldn’t be able to spot/track/find something they don’t know even exists till they are exposed to it over the course of the match.
At the start as a FT member you could look right at the Predator cloaked and not see it, you shouldn’t be able to identify Predator technology and sounds. Though as the match progresses and the Predator reveals itself, your awareness meter should rise to the point where cloak is just a shimmer and easy to spot, you know what a motion detector is and can hear when the Predator is near.

