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Effective Radiated Power (ERP) • <br /> The power supplied to an antenna multiplied by the relative gain of the antenna in a given <br /> direction. <br /> Electromagnetic Field (EMF) <br /> The local electric and magnetic fields that envelop the surrounding space. The most ubiquitous <br /> source of EMFs is from the movement and consumption of electric power, such as with <br /> transmission lines, household appliances and lighting. <br /> Federal Communications Commission (FCC) <br /> The federal agency responsible for licensing and regulating wireless communications providers. <br /> The FCC has primary regulatory control over communications providers through its powers to <br /> control interstate commerce and to provide a comprehensive national system in accordance with <br /> the Federal Communications Act. <br /> Frequency <br /> The number of cycles made by electromagnetic radiation in one second, usually expressed in <br /> units of hertz (Hz). <br /> Hertz <br /> A unit for expressing frequency which is the number of times a wave-like radio signal changes • <br /> from maximum positive to maximum negative charge per second. 1 Hz = 1 cycle per second. <br /> 1 kilohertz (kHz) = 1,000 Hz; 1 megahertz (MHz) = 1,000 kHz or 1,000,000 Hz; 1 gigahertz <br /> (GHz) = 1,000 MHz or 1 million kHz or 1 billion Hz. <br /> Interference <br /> Disturbances to reception caused by radiofrequency waves or other electric fields. • <br /> Microwave <br /> Electromagnetic radiation frequencies from 3 GHz to 300 GHz; highly directional when used for <br /> radiofrequency transmissions. Uses relatively low transmitter power levels when compared to <br /> other forms of transmission. <br /> Monopole <br /> A structure composed of a single spire used to support communications equipment. <br /> Non-ionizing EIectromagnetic Radiation <br /> Electromagnetic waves of low frequency, long wavelength, and low photon energy unable to <br /> cause ionization (i.e., to remove an electron from an atom). <br /> Panel Antenna <br /> An antenna or array of antennas designed to concentrate a radio signal in a particular area. Panel <br /> antennae are typically flat, rectangular devices approximately six square feet in size. Also called <br /> directional antennae. <br /> 42 <br />