<Li> A design allowance that provides for sufficient system gain or sensitivity to accommodate expected fading, for the purpose of ensuring that the required quality of service is maintained . </Li> <Li> The amount by which a received signal level may be reduced without causing system performance to fall below a specified threshold value . It is mainly used to describe a communication system such as satellite, for example a system like globalstar operates at 25 - 35 dB Fade margin </Li>

What is fade margin for a better link stability