![]() Reference is the reference power (for example, 1 mW). Signal is the power of the signal (for example, 50 mW). This list defines the terms in the formula: You can calculate the power in dBs from this formula: Power (in dB) = 10 * log10 (Signal/Reference) The abbreviation dB is often combined with other abbreviations in order to represent the values that are compared. The dB measures the power of a signal as a function of its ratio to another standardized value. Refer to Cisco Technical Tips Conventions for more information on document conventions. This document is not restricted to specific software and hardware versions. Prerequisites RequirementsĬisco recommends that you have knowledge of basic mathematics, such as logarithms and how to use them. This information can be very useful when you troubleshoot intermittent connectivity. This document defines radio frequency (RF) power levels and the most common measure, the decibel (dB). ![]()
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