In a long-distance RF link, which statement about Fade Margin is true?

A. The Fade Margin is a measurement of signal loss through free space and is a function of frequency and distance.

B. The Fade Margin of a long-distance radio link should be equivalent to the receiver-s low noise filter gain.

C. A Fade Margin is unnecessary on a long-distance RF link if more than 80% of

D. Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading.