# RF power margin

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In [telecommunications](/source/Telecommunications), the term **RF power margin** has the following meanings:

1. The amount of transmitter [power](/source/Power_(physics)) above that which is computed by the [link](/source/Data_link) designer as the minimum required to meet specified link performance. The RF [power margin](/source/Power_margin) allows for uncertainties in (a) empirical components of the [signal level](/source/Signal_level) prediction method, (b) terrain characteristics, (c) atmospheric conditions, and (d) equipment performance parameters.
1. At any given [time](/source/Time) in an operational link, the reserve transmitter power over that which is required to maintain specified link performance.

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Adapted from the Wikipedia article [RF power margin](https://en.wikipedia.org/wiki/RF_power_margin) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/RF_power_margin?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.