Maintaining information about radio transmission sites in a computer accessible database. In one aspect this is a living database consisting of hundreds of thousands of wireless sites and their unique characteristics. The database includes energy transmissions information including site specific physical locations and utilization characteristics of the sites. The System can deliver MPE maps of radio frequency radiation and site specific safety programs to any worker visiting a wireless site in the United States. These maps (and site's specific safety programs) are updated on a daily basis. The System can be accessed via the Internet by registered users. The System creates and displays MPE maps and radiation pattern maps showing gradation power densities to identify exposure dangers.

 
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> Tuning circuitry in a communications device

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