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Message: [QUOTE="Paul, post: 14241695"] The output power, takes into account the antenna gain. As the rating is EIRP. EIRP is how the unlicensed wireless specification is set up. The more gain the provided antenna has, the less power the RF transmitter could have, in order to stay within the EIRP power limit. That is done, so that the lobe of the transmitted signal (out in front of the antenna), stays at a legal power level. [URL]http://www.tp-link.com/en/products/details/?model=TL-WA5210G#spec[/URL] If you buy a product that comes with a weak antenna, then slap on an antenna with huge gain, that gives you an illegal power level right out in front of the antenna. And that's the reason for using the fancy antenna. Knowingly exceeding the EIRP by using an antenna with gain. You unscrew the 2dBi stick antenna and connect the 24dBi antenna in its place. Note that companies can sell gear intended for commercial usage (in a mall), with power levels above the unlicensed value, but then you just apply for a license to use the equipment. It makes you visible to the government. That's why these requests for fancy antennas are funny, as the owner of the antenna will truly be able to claim they don't know what an EIRP is, and they could not possibly know the power level was at the license-required level out in front of their antenna. Since our society triggers most things based on "complaints", if you disrupt the Wifi of your neighbors with your contraption, that's when the Department of Communications comes looking for the source. They would not normally check the transmit power level out in front of your antenna, just for fun. As the 2.4GHz band is already a mess, and it serves no purpose to patrol the entire city looking for parabolic dishes. But if a neighbor spots your parabolic antenna, and their Wifi stops working as a result, you are the first person they will blame. (Even if it is not your fault.) Just like they blame a Ham Radio operator here, if their TV doesn't work. Even if the Ham Radio operator no longer has a transmitter hooked to the antenna tower outside their home. The Ham Radio operator is the first person to receive a visit from the government. Paul [/QUOTE]

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