On the standard AM broadcast band, under 15.219, transmission power is limited by 100 milliwatts of DC input power to the final RF stage (with restrictions on size, height of, and type of antenna), or alternatively, under 15.221, if the AM transmission originates on the campus of an educational institution, the transmission can theoretically be any power so long as it does not exceed the field strength limits stated in 15.209 at the perimeter of the campus, 24,000/ f kHz μV/m. These devices include personal computers and peripheral devices, and electrical ballasts for fluorescent lights. The emission limits for Class B devices are about 10 dB more restrictive than those for Class A devices since they are more likely to be located closer to radio and television receivers. Class B Device marketed for use in a residential environment, notwithstanding use in industrial or commercial environments.Class A Device marketed for use in business/industrial/commercial environments. ![]() Unintentional radiators are designated in two major classes: An available channel is a 6 megahertz television channel that is not being used by an authorized service in a given geographical location, and thus may be used by unlicensed devices under the provisions of this rule part. ![]() G - Access Broadband over Power Line ġ5.601 to 15.615 deal with broadband over power lines (BPL) devices operating in the 1.705–80 MHz band over medium- or low- voltage lines.ġ5.701 to 15.717 deal with (TVBDs), TV-band devices that operate on an available television channel in the broadcast television band. Sections 15.301 to 15.323 deal with unlicensed PCS devices from 1.91 to 1.93 GHz.Ĭordless telephones using DECT 6.0 standards use this unlicensed PCS band.ġ5.401 to 15.407 deal with unlicensed National Information Infrastructure (U-NII) devicesġ5.501 to 15.525 deal with ultra-wideband (UWB) devices, including ground-penetrating radar. 15.247 covers most Wi-Fi frequencies that aren't U-NII. Specific to broadcasting, 15.221 (and 15.219) deal with the AM band & 15.239 deals with the FM band. Subpart C deals with devices that are specifically designed to produce coherent radio waves, such as small transmitters. There are 16 sections between 15.101 and 15.123. Subpart B deals with unintentional radiators-devices for which the purpose is not to produce radio waves, but which do anyway, such as computers. You are cautioned that any changes or modifications to devices not expressly approved by the party responsible for compliance may void your authority to operate devices.Ĥ7 CFR 15.5 prohibits intentional damped wave transmissions such as spark-gap transmitters which were common before the 1920s but occupy a needlessly wide range of frequencies.Ĥ7 CFR 15.9 prohibits operating a device under Part 15 for the purpose of eavesdropping, except when under lawful authority of law enforcement or when all parties in a conversation consent. ![]() Subpart A includes 21 sections from 15.1 to 15.38.Ĥ7 CFR 15.1 states that any radiator (that which emits radio energy), whether or not intentional, must be licensed unless it meets 47 CFR 15 or is otherwise exempted by the FCC.Ĥ7 CFR 15.3 the definitions are defined by the definition given.Ĥ7 CFR 15.5 contains a general provision that devices may not cause interference and must accept any interference received.
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