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First recorded activity by BoatBanter: Nov 2006
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Default WiFi for boats

Geoff Schultz wrote:


Can someone explain what "21 dBm" and "Up to 40 EIRP (dBi)" means in the
transmit power section of the above PDF file?

-- Geoff
www.GeoffSchultz.org


21 dBm is 21 dB above 1 mw of power ~105x. 40 dBi EIRP is 40 dB
(10,000x) up on the isotropic (radiated in a sphere) radiated power and
usually refers to a directional antenna gain but such a large number
must include the transmitter power probably relative to 1 mW.
Dick


 
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