شماتیک ستاپ اندازه‌گیری آزمون Dynamic Frequency Selection در شکل زیر تشریح شده است:

:An RLAN shall employ a Dynamic Frequency Selection (DFS) function to

 detect interference from radar systems (radar detection) and to avoid co-channel operation with these systems-

 (Provide on aggregate a near-uniform loading of the spectrum (Uniform Spreading-