Effective radiated power
From Wikipedia, the free encyclopedia.

In radio communications, effective radiated power is determined by subtracting system losses from system gains. ERP is typically applied to antenna systems. For example, if an antenna system has +9db gain and -6db losses, its ERP is +3db.

The original article can be found at: http://en.wikipedia.org/wiki/Effective_radiated_power.
All text is available under the terms of the GNU Free Documentation License.