2013 X5 E70 antenna testing with NT510 elite

[rvaughnp]

Has anyone done this or know a way to test the signal of the antenna's in the car?
I just noticed the other night that when I hold my fob close to the center of the roof it works every time.
So far the last 2 days, it has worked from the outside, holding the fob over the top of the car, every time.

I have posted earlier about the issue I have had with the fob and was contemplating on putting it in the shop to have them figure it out.
I think I'm onto something but want to be able to test as I hate just replacing.