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(c) The total electromagnetic field from a tunnel radio system on any frequency or frequencies appearing outside of the tunnel, mine or other structure describ... |
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(a) Single modular transmitters consist of a completely self-contained radiofrequency transmitter device that is typically incorporated into another product, h... |
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(iv) The modular transmitter must comply with the antenna and transmission system requirements of [§§ 15.203](/on/2024-04-11/title-47/section-15.203), [15.204(... |
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(v) The modular transmitter must be tested in a stand-alone configuration, _i.e._, the module must not be inside another device during testing for compliance w... |
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(A) If using a permanently affixed label, the modular transmitter must be labeled with its own FCC identification number, and, if the FCC identification number... |
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(B) If the modular transmitter uses an electronic display of the FCC identification number, the information must be readily accessible and visible on the modul... |
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(viii) Radio frequency devices operating under the provisions of this part are subject to the radio frequency radiation exposure requirements specified in [§§ ... |
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(iii) The sections of a split modular transmitter must be tested installed in a host device(s) similar to that which is representative of the platform(s) inten... |
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(b) A limited modular approval may be granted for single or split modular transmitters that do not comply with all of the above requirements, e.g., shielding, ... |
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An intentional radiator used as cable locating equipment, as defined in [§ 15.3(d)](/on/2024-04-11/title-47/section-15.3#p-15.3(d)), may be operated on any fre... |
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(b) A cordless telephone that is intended to be connected to the public switched telephone network shall also comply with the applicable regulations in [part 6... |
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(d) Cordless telephones shall incorporate circuitry which makes use of a digital security code to provide protection against unintentional access to the public... |
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(i) Provide a means for the user to readily select from among at least 256 possible discrete digital codes. The cordless telephone shall be either in a non-ope... |
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Radiated Emission Limits, Additional Provisions
#### § 15.215 Additional provisions to the general radiated emission limitations.
(a) The regulations in [§§ ... |
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(c) Intentional radiators operating under the alternative provisions to the general emission limits, as contained in [§§ 15.217](/on/2024-04-11/title-47/sectio... |
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specified in the regulations, it is recommended that the fundamental emission be kept within at least the central 80% of the permitted band in order to minimiz... |
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(b) The total length of the transmission line, antenna, and ground lead (if used) shall not exceed 15 meters.
(c) All emissions below 160 kHz or above 190 kHz... |
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(c) All emissions below 510 kHz or above 1705 kHz shall be attenuated at least 20 dB below the level of the unmodulated carrier. Determination of compliance wi... |
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(b) As an alternative to the provisions in [paragraph (a)](/on/2024-04-11/title-47/section-15.221#p-15.221(a)) of this section, intentional radiators used for ... |
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(3) The conducted limits specified in [§ 15.207](/on/2024-04-11/title-47/section-15.207) apply to the radio frequency voltage on the public utility power lines... |
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\[[56 FR 373](https://www.federalregister.gov/citation/56-FR-373), Jan. 4, 1991\]
#### § 15.223 Operation in the band 1.705-10 MHz.
(a) The field strength of... |
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(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](/on/2024-04-11/title... |
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(e) The frequency tolerance of the carrier signal shall be maintained within ±0.01% of the operating frequency over a temperature variation of −20 degrees to +... |
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(b) The field strength of any emissions which appear outside of this band shall not exceed the general radiated emission limits in [§ 15.209](/on/2024-04-11/ti... |
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(c) The field strength of any emissions appearing outside of this band shall not exceed the general radiated emission limits in [§ 15.209](/on/2024-04-11/title... |
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(a) The provisions of this section are restricted to periodic operation within the band 40.66-40.70 MHz and above 70 MHz. Except as shown in [paragraph (e)](/o... |
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(3) Periodic transmissions at regular predetermined intervals are not permitted. However, polling or supervision transmissions, including data, to determine sy... |
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(b) In addition to the provisions of [§ 15.205](/on/2024-04-11/title-47/section-15.205), the field strength of emissions from intentional radiators operated un... |
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(2) Intentional radiators operating under the provisions of this section shall demonstrate compliance with the limits on the field strength of emissions, as sh... |
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(c) The bandwidth of the emission shall be no wider than 0.25% of the center frequency for devices operating above 70 MHz and below 900 MHz. For devices operat... |
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(e) Intentional radiators may operate at a periodic rate exceeding that specified in [paragraph (a)](/on/2024-04-11/title-47/section-15.231#p-15.231(a)) of thi... |
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\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989; [54 FR 32340](https://www.federalregister.gov/citation/54-FR-32340), Aug.... |
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(i) Incorporate an automatic channel selection mechanism that will prevent establishment of a link on any occupied frequency; and
(ii) The box or an instructi... |
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44.160
49.160
9
44.180
49.200
10
44.200
49.240
11
44.320
49.280
12
44.360
49.360
13
44.400
49.400
14
44.460
49.460
15
44.480
49.500
16
... |
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(d) The fundamental emission shall be confined within a 20 kHz band and shall be centered on a carrier frequency shown above, as adjusted by the frequency tole... |
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(f) If the device provides for the connection of external accessories, including external electrical input signals, the device must be tested with the accessor... |
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Notice: The base units of some cordless telephones may respond to other nearby units or to radio noise resulting in telephone calls being dialed through this u... |
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(a) The field strength of any emission within this band shall not exceed 10,000 microvolts/meter at 3 meters. The emission limit in this paragraph is based on ... |
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(1) The RF carrier and modulation products shall be maintained within the band 49.82-49.90 MHz.
(2) The total input power to the device measured at the batter... |
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(1) _Wireless Microphone._ An intentional radiator that converts sound into electrical audio signals that are transmitted using radio signals to a receiver whi... |
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(4) _600 MHz service band._ Frequencies in the 617-652 MHz and 663-698 MHz bands that are reallocated and reassigned for 600 MHz band services under part 27.
... |
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(2) Frequencies in the 600 MHz service band on which a 600 MHz service licensee has not commenced operations, as defined in [§ 27.4 of this chapter](/on/2024-0... |
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(1) In the bands allocated and assigned for broadcast television and in the 600 MHz service band: 50 mW EIRP
(2) In the 600 MHz guard band and the 600 MHz dup... |
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(f) The operating frequency within a permissible band of operation as defined in paragraph (c) must comply with the following requirements.
(1) The frequency ... |
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(g) Emissions within the band from one megahertz below to one megahertz above the carrier frequency shall comply with the emission mask in [§ 8.3](/on/2024-04-... |
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(b) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered on the operating frequency. The 200 kHz band shall lie wholly... |
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(a) Emissions from the intentional radiator shall be confined within a band 200 kHz wide centered on the operating frequency. The 200 kHz band shall lie wholly... |
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(1) The dates and places where the device will be operated;
(2) The purpose for which the device will be used;
(3) A description of the device, including the... |
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(a) Operation under the provisions of this section is restricted to devices that use radio frequency energy to identify the contents of commercial shipping con... |
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(c) The field strength of emissions radiated on any frequency outside of the specified band shall not exceed the general radiated emission limits in [§ 15.209]... |
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(f) As a condition of the grant, the grantee of an equipment authorization for a device operating under the provisions of this section shall provide informatio... |
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device. The material shall be submitted to the following address: Experimental Licensing Branch, OET, Federal Communications Commission, at the address of the ... |
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(c) The field strength of any emissions radiated within the specified 200 kHz band shall not exceed 1500 microvolts/meter at 3 meters. The field strength of em... |
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(2) This authority to operate does not extend to mobile vehicles, such as ambulances, even if those vehicles are associated with a health care facility.
(b) T... |
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(d) The user and the installer of a biomedical telemetry device operating within the frequency range 174-216 MHz, 470-608 MHz or 614-668 MHz shall ensure that ... |
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(5) Whatever distance is necessary to protect other authorized users within these bands.
(e) The user and the installer of a biomedical telemetry device opera... |
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(f) Biomedical telemetry devices must not cause harmful interference to licensed TV broadcast stations or to other authorized radio services, such as operation... |
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(g) The manufacturers, installers, and users of biomedical telemetry devices are reminded that they must ensure that biomedical telemetry transmitters operatin... |
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(a) Operation under the provisions of this section is restricted to devices that use radio frequency energy to measure the characteristics of a material. Devic... |
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(d) The device shall be self-contained with no external or readily accessible controls which may be adjusted to permit operation in a manner inconsistent with ... |
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(1) Regardless of the limits shown in the above table, harmonic emissions in the restricted bands below 17.7 GHz, as specified in [§ 15.205](/on/2024-04-11/tit... |
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(iii) Field disturbance sensors designed to be used in motor vehicles or aircraft must include features to prevent continuous operation unless their emissions ... |
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\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989, as amended at [55 FR 46792](https://www.federalregister.gov/citation/55-F... |
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(1) Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hopping channel, wh... |
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(ii) Frequency hopping systems operating in the 5725-5850 MHz band shall use at least 75 hopping frequencies. The maximum 20 dB bandwidth of the hopping channe... |
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(1) For frequency hopping systems operating in the 2400-2483.5 MHz band employing at least 75 non-overlapping hopping channels, and all frequency hopping syste... |
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(3) For systems using digital modulation in the 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz bands: 1 Watt. As an alternative to a peak power measurement, c... |
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(4) The conducted output power limit specified in [paragraph (b)](/on/2024-04-11/title-47/section-15.247#p-15.247(b)) of this section is based on the use of an... |
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(iii) Fixed, point-to-point operation, as used in [paragraphs (c)(1)(i)](/on/2024-04-11/title-47/section-15.247#p-15.247(c)(1)(i)) and [(c)(1)(ii)](/on/2024-04... |
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(2) In addition to the provisions in [paragraphs (b)(1)](/on/2024-04-11/title-47/section-15.247#p-15.247(b)(1)), [(b)(3)](/on/2024-04-11/title-47/section-15.24... |
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(ii) If the transmitter employs an antenna system that emits multiple directional beams but does not do emit multiple directional beams simultaneously, the tot... |
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(iii) If a transmitter employs an antenna that operates simultaneously on multiple directional beams using the same or different frequency channels, the power ... |
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(d) In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio freque... |
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(e) For digitally modulated systems, the power spectral density conducted from the intentional radiator to the antenna shall not be greater than 8 dBm in any 3... |
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Note to paragraph (f):
The transition provisions found in [§ 15.37(h)](/on/2024-04-11/title-47/section-15.37#p-15.37(h)) will apply to hybrid devices beginnin... |
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(h) The incorporation of intelligence within a frequency hopping spread spectrum system that permits the system to recognize other users within the spectrum ba... |
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(i) Radio frequency devices operating under the provisions of this part are subject to the radio frequency radiation exposure requirements specified in [§§ 1.1... |
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\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989, as amended at [55 FR 28762](https://www.federalregister.gov/citation/55-F... |
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(b) Fixed, point-to-point operation as referred to in this paragraph shall be limited to systems employing a fixed transmitter transmitting to a fixed remote l... |
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(3) Antenna gain must be at least 33 dBi. Alternatively, the main lobe beamwidth must not exceed 3.5 degrees. The beamwidth limit shall apply to both the azimu... |
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(e) As shown in [§ 15.35(b)](/on/2024-04-11/title-47/section-15.35#p-15.35(b)), for frequencies above 1000 MHz, the field strength limits in [paragraphs (a)](/... |
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(b) The −10 dB bandwidth of the fundamental emission shall be at least 50 MHz. For transmitters that employ frequency hopping, stepped frequency or similar mod... |
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(d) Emissions from a transmitter operating under this section shall not exceed the following equivalent isotropically radiated power (EIRP) density levels:
(1... |
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(3) There is a limit on the peak level of the emissions contained within a 50 MHz bandwidth centered on the frequency at which the highest radiated emission oc... |
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(5) Emissions from digital circuitry used to enable the operation of the transmitter may comply with the limits in [§ 15.209](/on/2024-04-11/title-47/section-1... |
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(1) All emissions at and below 960 MHz are based on measurements employing a CISPR quasi-peak detector. Unless otherwise specified, all RMS average emission le... |
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(3) For transmitters that employ frequency hopping, stepped frequency or similar modulation types, the peak emission level measurement, the measurement of the ... |
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(b) The field strength anywhere within the frequency range swept by the signal shall not exceed 3000 microvolts/meter/MHz at 3 meters in any direction. Further... |
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(d) An AVIS shall employ a horn antenna or other comparable directional antenna for signal emission.
(e) Provision shall be made so that signal emission from ... |
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*(2) The angular separation between the direction at which maximum field strength occurs and the direction at which the field strength is reduced to 400 microv... |
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*(a) Operation under this section is limited to field disturbance sensors that are mounted in terrestrial transportation vehicles. Terrestrial use is limited t... |
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*(3) For systems operating in the 23.12-29.0 GHz band, the frequencies at which the highest average emission level and at which the highest peak level emission... |
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*−61.3
23,120-23,600
−41.3
23,600-24,000
−61.3
24,000-29,000
−41.3
Above 29,000
—61.3
(2) In addition to the radiated emissions limits specified in th... |
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*(3) There is a limit on the peak level of the emissions contained within a 50 MHz bandwidth centered on the frequency at which the highest radiated emission o... |
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*(5) Emissions from digital circuitry used to enable the operation of the transmitter may comply with the limits in [§ 15.209](/on/2024-04-11/title-47/section-... |
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*(1) All emissions at and below 960 MHz are based on measurements employing a CISPR quasi-peak detector. Unless otherwise specified, all RMS average emission l... |
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*(3) For transmitters that employ frequency hopping, stepped frequency or similar modulation types, the peak emission level measurement, the measurement of the... |
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*\[[70 FR 6775](https://www.federalregister.gov/citation/70-FR-6775), Feb. 9, 2005, as amended at [82 FR 43870](https://www.federalregister.gov/citation/82-FR-... |
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*(ii) Except as permitted in [paragraph (b)(3)](/on/2024-04-11/title-47/section-15.255#p-15.255(b)(3)) of this section, equipment shall not be used on aircraft... |
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*(c) _Radiated power limits._ Within the 57-71 GHz band, emission levels shall not exceed the following equivalent isotropically radiated power (EIRP):
(1) De... |
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