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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 47 - Telecommunication |
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Chapter I - Federal Communications Commission |
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SubChapter A - General |
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Part 15 - Radio Frequency Devices |
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Subpart C - Intentional Radiators |
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Radiated Emission Limits, Additional Provisions |
§ 15.223 - Operation in the band 1.705-10 MHz.
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§ 15.223 Operation in the band 1.705-10 MHz.
(a) The field strength of any emission within the band 1.705-10.0 MHz shall not exceed 100 microvolts/meter at a distance of 30 meters. However, if the bandwidth of the emission is less than 10% of the center frequency, the field strength shall not exceed 15 microvolts/meter or (the bandwidth of the device in kHz) divided by (the center frequency of the device in MHz) microvolts/meter at a distance of 30 meters, whichever is the higher level. For the purposes of this section, bandwidth is determined at the points 6 dB down from the modulated carrier. The emission limits in this paragraph are based on measurement instrumentation employing an average detector. The provisions in § 15.35(b) for limiting peak emissions apply.
(b) The field strength of emissions outside of the band 1.705-10.0 MHz shall not exceed the general radiated emission limits in § 15.209.