Do you have enough distance between your Network Unit and Coverage Unit?
The number on your Coverage Unit tells you the relationship of distance between your two systems. The range is 1-9 with 9 being the greatest distance( a higher number is better).
Just as the interior construction of every building can be very different so can the distance between your Network Unit (NU/WU) and Coverage Units(CU).
**Network Unit (NU) is also known as the Window Unit (WU).**