Discussion
What is a fade margin?
Answer: C
Fade margin is the number of decibels by which the received signal in clear conditions exceeds the level at which the link fails, and it is chosen so that fades exceed it only for the permitted outage time. It is not simply the difference between transmitter and receiver specifications, which ignores the path. Antenna gain and alignment enter the budget separately. A margin sized from the statistics of the impairment, rather than chosen arbitrarily, is what turns a prediction into a service level.
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