Originally Posted By rrlev
Even more questions
What is the test setup .... you need to have walls to reflect off of ...


If memory serves, there are two curves posted. The red curve is the on axis curve. The blue is the average response of curves at 7.5 degree increments in both the horizontal and vertical plane, or 48 measurements in both the horizontal and vertical planes.

It is also done in the chamber to keep any effect of the sidewalls, floor and ceiling from occurring.