Can the airport express range be limited

I am getting ready to go off to college, and I know I'm going to get a power book. I want to get an airport express to use in my dorm because the school doesn't have wireless internet. However, wireless routers are not allowed on campus because of security issues. I know about mac filtering, and I'm definitely going to use it. What I really want to know is, can the signal strength of an airport express base station be turned down so the signal won't reach too far past my dorm room. I know most people are trying to extend the range, but I need exactly the opposite. thanks-james

You can lower the transmitter power of the AirPort Extreme and Express base stations, which effectively lowers the range. The following article tells you how:
Controlling the range of your network
http://docs.info.apple.com/article.html?artnum=166675

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