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(h) Digital devices in which both the highest frequency generated and the highest frequency used are less than 1.705 MHz and which do not operate from the AC power lines or contain provisions for operation while connected to the AC power lines. Digital devices that include, or make provision for the use of, battery eliminators, AC adaptors or battery chargers which permit operation while charging or that connect to the AC power lines indirectly, obtaining their power through another device which is connected to the AC power lines, do not fall under this exemption.
(i) Responsible parties should note that equipment containing more than one device is not exempt from the technical standards in this part unless all of the devices in the equipment meet the criteria for exemption. If only one of the included devices qualifies for exemption, the remainder of the equipment must comply with any applicable regulations. If a device performs more than one function and all of those functions do not meet the criteria for exemption, the device does not qualify for inclusion under the exemptions.
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(j) Notwithstanding other provisions of this section, the rules governing certification apply to any equipment produced by any entity identified on the Covered List, as established pursuant to [§ 1.50002 of this chapter](/on/2024-04-11/title-47/section-1.50002), as producing covered communications equipment.
\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989, as amended at [88 FR 7625](https://www.federalregister.gov/citation/88-FR-7625), Feb. 6, 2023\]
#### § 15.105 Information to the user.
(a) For a Class A digital device or peripheral, the instructions furnished the user shall include the following or similar statement, placed in a prominent location in the text of the manual:
Note:
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This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
(b) For a Class B digital device or peripheral, the instructions furnished the user shall include the following or similar statement, placed in a prominent location in the text of the manual:
Note:
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This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver.
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.
(c) The provisions of [paragraphs (a)](/on/2024-04-11/title-47/section-15.105#p-15.105(a)) and [(b)](/on/2024-04-11/title-47/section-15.105#p-15.105(b)) of this section do not apply to digital devices exempted from the technical standards under the provisions of [§ 15.103](/on/2024-04-11/title-47/section-15.103).
(d) For systems incorporating several digital devices, the statement shown in [paragraph (a)](/on/2024-04-11/title-47/section-15.105#p-15.105(a)) or [(b)](/on/2024-04-11/title-47/section-15.105#p-15.105(b)) of this section needs to be contained only in the instruction manual for the main control unit.
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(e) In cases where the manual is provided only in a form other than paper, such as on a computer disk or over the Internet, the information required by this section may be included in the manual in that alternative form, provided the user can reasonably be expected to have the capability to access information in that form.
\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989, as amended at [68 FR 68546](https://www.federalregister.gov/citation/68-FR-68546), Dec. 9, 2003\]
#### § 15.107 Conducted limits.
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(a) Except for Class A digital devices, for equipment that is designed to be connected to the public utility (AC) power line, the radio frequency voltage that is conducted back onto the AC power line on any frequency or frequencies within the band 150 kHz to 30 MHz shall not exceed the limits in the following table, as measured using a 50 μH/50 ohms line impedance stabilization network (LISN). Compliance with the provisions of this paragraph shall be based on the measurement of the radio frequency voltage between each power line and ground at the power terminal. The lower limit applies at the band edges.
Frequency of emission (MHz)
Conducted limit (dBμV)
Quasi-peak
Average
0.15-0.5
66 to 56\*
56 to 46\*
0.5-5
56
46
5-30
60
50
\*Decreases with the logarithm of the frequency.
(b) For a Class A digital device that is designed to be connected to the public utility (AC) power line, the radio frequency voltage that is conducted back onto the AC power line on any frequency or frequencies within the band 150 kHz to 30 MHz shall not exceed the limits in the following table, as measured using a 50 μH/50 ohms LISN. Compliance with the provisions of this paragraph shall be based on the measurement of the radio frequency voltage between each power line and ground at the power terminal. The lower limit applies at the boundary between the frequency ranges.
Frequency of emission (MHz)
Conducted limit (dBμV)
Quasi-peak
Average
0.15-0.5
79
66
0.5-30
73
60
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*(c) The limits shown in [paragraphs (a)](/on/2024-04-11/title-47/section-15.107#p-15.107(a)) and [(b)](/on/2024-04-11/title-47/section-15.107#p-15.107(b)) of this section shall not apply to carrier current systems operating as unintentional radiators on frequencies below 30 MHz. In lieu thereof, these carrier current systems shall be subject to the following standards:
(1) For carrier current systems containing their fundamental emission within the frequency band 535-1705 kHz and intended to be received using a standard AM broadcast receiver: no limit on conducted emissions.
(2) For all other carrier current systems: 1000 μV within the frequency band 535-1705 kHz, as measured using a 50 μH/50 ohms LISN.
(3) Carrier current systems operating below 30 MHz are also subject to the radiated emission limits in [§ 15.109(e)](/on/2024-04-11/title-47/section-15.109#p-15.109(e)).
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*(d) Measurements to demonstrate compliance with the conducted limits are not required for devices which only employ battery power for operation and which do not operate from the AC power lines or contain provisions for operation while connected to the AC power lines. Devices that include, or make provision for, the use of battery chargers which permit operating while charging, AC adaptors or battery eliminators or that connect to the AC power lines indirectly, obtaining their power through another device which is connected to the AC power lines, shall be tested to demonstrate compliance with the conducted limits.
\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989, as amended at [57 FR 33448](https://www.federalregister.gov/citation/57-FR-33448), July 29, 1992; [58 FR 51249](https://www.federalregister.gov/citation/58-FR-51249), Oct. 1, 1993; [66 FR 19098](https://www.federalregister.gov/citation/66-FR-19098), Apr. 13, 2001; [67 FR 45670](https://www.federalregister.gov/citation/67-FR-45670), July 10, 2002\]
#### § 15.109 Radiated emission limits.
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*(a) Except for Class A digital devices, the field strength of radiated emissions from unintentional radiators at a distance of 3 meters shall not exceed the following values:
Frequency of emission (MHz)
Field strength (microvolts/meter)
30-88
100
88-216
150
216-960
200
Above 960
500
(b) The field strength of radiated emissions from a Class A digital device, as determined at a distance of 10 meters, shall not exceed the following:
Frequency of emission (MHz)
Field strength (microvolts/meter)
30-88
90
88-216
150
216-960
210
Above 960
300
(c) In the emission tables above, the tighter limit applies at the band edges. Sections 15.33 and 15.35 which specify the frequency range over which radiated emissions are to be measured and the detector functions and other measurement standards apply.
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*(d) For CB receivers, the field strength of radiated emissions within the frequency range of 25-30 MHz shall not exceed 40 microvolts/meter at a distance of 3 meters. The field strength of radiated emissions above 30 MHz from such devices shall comply with the limits in [paragraph (a)](/on/2024-04-11/title-47/section-15.109#p-15.109(a)) of this section.
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*(e) Carrier current systems used as unintentional radiators or other unintentional radiators that are designed to conduct their radio frequency emissions via connecting wires or cables and that operate in the frequency range of 9 kHz to 30 MHz, including devices that deliver the radio frequency energy to transducers, such as ultrasonic devices not covered under [part 18 of this chapter](/on/2024-04-11/title-47/part-18), shall comply with the radiated emission limits for intentional radiators provided in [§ 15.209](/on/2024-04-11/title-47/section-15.209) for the frequency range of 9 kHz to 30 MHz. As an alternative, carrier current systems used as unintentional radiators and operating in the frequency range of 525 kHz to 1705 kHz may comply with the radiated emission limits provided in [§ 15.221(a)](/on/2024-04-11/title-47/section-15.221#p-15.221(a)). At frequencies above 30 MHz, the limits in [paragraph (a)](/on/2024-04-11/title-47/section-15.109#p-15.109(a)), [(b)](/on/2024-04-11/title-47/section-15.109#p-15.109(b)), or [(g)](/on/2024-04-11/title-47/section-15.109#p-15.109(g)) of this section, as appropriate, apply.
(f) For a receiver which employs terminals for the connection of an external receiving antenna, the receiver shall be tested to demonstrate compliance with the provisions of this section with an antenna connected to the antenna terminals unless the antenna conducted power is measured as specified in [§ 15.111(a)](/on/2024-04-11/title-47/section-15.111#p-15.111(a)). If a permanently attached receiving antenna is used, the receiver shall be tested to demonstrate compliance with the provisions of this section.
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*(g) As an alternative to the radiated emission limits shown in [paragraphs (a)](/on/2024-04-11/title-47/section-15.109#p-15.109(a)) and [(b)](/on/2024-04-11/title-47/section-15.109#p-15.109(b)) of this section, digital devices may be shown to comply with the standards contained in Third Edition of the International Special Committee on Radio Interference (CISPR), Pub. 22, “Information Technology Equipment—Radio Disturbance Characteristics—Limits and Methods of Measurement” (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38)). In addition:
(1) The test procedure and other requirements specified in this part shall continue to apply to digital devices.
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*(2) If, in accordance with [§ 15.33 of this part](/on/2024-04-11/title-47/part-15/section-15.33), measurements must be performed above 1000 MHz, compliance above 1000 MHz shall be demonstrated with the emission limit in [paragraph (a)](/on/2024-04-11/title-47/section-15.109#p-15.109(a)) or [(b)](/on/2024-04-11/title-47/section-15.109#p-15.109(b)) of this section, as appropriate. Measurements above 1000 MHz may be performed at the distance specified in the CISPR 22 publications for measurements below 1000 MHz provided the limits in [paragraphs (a)](/on/2024-04-11/title-47/section-15.109#p-15.109(a)) and [(b)](/on/2024-04-11/title-47/section-15.109#p-15.109(b)) of this section are extrapolated to the new measurement distance using an inverse linear distance extrapolation factor (20 dB/decade), e.g., the radiated limit above 1000 MHz for a Class B digital device is 150 uV/m, as measured at a distance of 10 meters.
(3) The measurement distances shown in CISPR Pub. 22, including measurements made in accordance with this paragraph above 1000 MHz, are considered, for the purpose of [§ 15.31(f)(4) of this part](/on/2024-04-11/title-47/part-15/section-15.31#p-15.31(f)(4)), to be the measurement distances specified in this part.
(h) Radar detectors shall comply with the emission limits in [paragraph (a)](/on/2024-04-11/title-47/section-15.109#p-15.109(a)) of this section over the frequency range of 11.7-12.2 GHz.
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*\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989, as amended at [56 FR 373](https://www.federalregister.gov/citation/56-FR-373), Jan. 4, 1991; [58 FR 51249](https://www.federalregister.gov/citation/58-FR-51249), Oct. 1, 1993; [66 FR 19098](https://www.federalregister.gov/citation/66-FR-19098), Apr. 13, 2001; [67 FR 48993](https://www.federalregister.gov/citation/67-FR-48993), July 29, 2002; [69 FR 2849](https://www.federalregister.gov/citation/69-FR-2849), Jan. 21, 2004; [80 FR 33447](https://www.federalregister.gov/citation/80-FR-33447), June 12, 2015\]
#### § 15.111 Antenna power conduction limits for receivers.
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*(a) In addition to the radiated emission limits, receivers that operate (tune) in the frequency range 30 to 960 MHz and CB receivers that provide terminals for the connection of an external receiving antenna may be tested to demonstrate compliance with the provisions of [§ 15.109](/on/2024-04-11/title-47/section-15.109) with the antenna terminals shielded and terminated with a resistive termination equal to the impedance specified for the antenna, provided these receivers also comply with the following: With the receiver antenna terminal connected to a resistive termination equal to the impedance specified or employed for the antenna, the power at the antenna terminal at any frequency within the range of measurements specified in [§ 15.33](/on/2024-04-11/title-47/section-15.33) shall not exceed 2.0 nanowatts.
(b) CB receivers and receivers that operate (tune) in the frequency range 30 to 960 MHz that are provided only with a permanently attached antenna shall comply with the radiated emission limitations in this part, as measured with the antenna attached.
#### § 15.113 Power line carrier systems.
Power line carrier systems, as defined in [§ 15.3(t)](/on/2024-04-11/title-47/section-15.3#p-15.3(t)), are subject only to the following requirements:
(a) A power utility operating a power line carrier system shall submit the details of all existing systems plus any proposed new systems or changes to existing systems to an industry-operated entity as set forth in [§ 90.35(g) of this chapter](/on/2024-04-11/title-47/section-90.35#p-90.35(g)). No notification to the FCC is required.
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*(b) The operating parameters of a power line carrier system (particularly the frequency) shall be selected to achieve the highest practical degree of compatibility with authorized or licensed users of the radio spectrum. The signals from this operation shall be contained within the frequency band 9 kHz to 490 kHz. A power line carrier system shall operate on an unprotected, non-interference basis in accordance with [§ 15.5 of this part](/on/2024-04-11/title-47/part-15/section-15.5). If harmful interference occurs, the electric power utility shall discontinue use or adjust its power line carrier operation, as required, to remedy the interference. Particular attention should be paid to the possibility of interference to Loran C operations at 100 kHz.
(c) Power line carrier system apparatus shall be operated with the minimum power possible to accomplish the desired purpose. No equipment authorization is required.
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*(d) The best engineering principles shall be used in the generation of radio frequency currents by power line carrier systems to guard against harmful interference to authorized radio users, particularly on the fundamental and harmonic frequencies.
(e) Power line carrier system apparatus shall conform to such engineering standards as may be promulgated by the Commission. In addition, such systems should adhere to industry approved standards designed to enhance the use of power line carrier systems.
(f) The provisions of this section apply only to systems operated by a power utility for general supervision of the power system and do not permit operation on electric lines which connect the distribution substation to the customer or house wiring. Such operation can be conducted under the other provisions of this part.
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*(g) _Special provisions._ An electric power utility entity shall not operate a new or modified power line carrier (PLC) system in the 135.7-137.8 kHz and/or 472-479 kHz bands if a previously coordinated amateur station pursuant to [§ 97.301(g)(2) of this chapter](/on/2024-04-11/title-47/section-97.301#p-97.301(g)(2)) is located within one kilometer of the transmission lines conducting the PLC signal.
\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989; [54 FR 32339](https://www.federalregister.gov/citation/54-FR-32339), Aug. 7, 1989; [75 FR 63031](https://www.federalregister.gov/citation/75-FR-63031), Oct. 13, 2010; [82 FR 27213](https://www.federalregister.gov/citation/82-FR-27213), June 14, 2017\]
#### § 15.115 TV interface devices, including cable system terminal devices.
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*(a) Measurements of the radiated emissions of a TV interface device shall be conducted with the output terminal(s) of the device terminated by a resistance equal to the rated output impedance. The emanations of a TV interface device incorporating an intentional radiator shall not exceed the limits in [§ 15.109](/on/2024-04-11/title-47/section-15.109) or [subpart C of this part](/on/2024-04-11/title-47/part-15/subpart-C), whichever is higher for each frequency. Where it is possible to determine which portion of the device is contributing a particular radio frequency emission, the emissions from the TV interface device portion shall comply with the emission limits in [§ 15.109](/on/2024-04-11/title-47/section-15.109), and the emissions from the intentional radiator shall comply with [subpart C of this part](/on/2024-04-11/title-47/part-15/subpart-C).
(b) Output signal limits:
(1) At any RF output terminal, the maximum measured RMS voltage, in microvolts, corresponding to the peak envelope power of the modulated signal during maximum amplitude peaks across a resistance (R in ohms) matching the rated output impedance of the TV interface device, shall not exceed the following:
(i) For a cable system terminal device or a TV interface device used with a master antenna, 692.8 times the square root of (R) for the video signal and 155 times the square root of (R) for the audio signal.
(ii) For all other TV interface devices, 346.4 times the square root of (R) for the video signal and 77.5 times the square root of (R) for the audio signal.
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*(2) At any RF output terminal, the maximum measured RMS voltage, in microvolts, corresponding to the peak envelope power of the modulated signal during maximum amplitude peaks across a resistance (R in ohms) matching the rated output impedance of the TV interface device, of any emission appearing on frequencies removed by more than 4.6 MHz below or 7.4 MHz above the video carrier frequency on which the TV interface device is operated shall not exceed the following:
(i) For a cable system terminal device or a TV interface device used with a master antenna, 692.8 times the square root of (R).
(ii) For all other TV interface devices, 10.95 times the square root of (R).
(3) The term _master antenna_ used in this section refers to TV interface devices employed for central distribution of television or other video signals within a building. Such TV interface devices must be designed to:
(i) Distribute multiple television signals at the same time;
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*(ii) Distribute such signals by cable to outlets or TV receivers in multiple rooms in the building in which the TV interface devices are installed; and,
(iii) Distribute all over-the-air or cable signals.
Note:
Cable-ready video cassette recorders continue to be subject to the provisions for general TV interface devices.
(c) A TV interface device shall be equipped with a transfer switch for connecting the antenna terminals of a receiver selectively either to the receiving antenna or to the radio frequency output of the TV interface device, subject to the following:
(1) When measured in any of its set positions, transfer switches shall comply with the following requirements:
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*(i) For a cable system terminal device or a TV interface device equipped for use with a cable system or a master antenna, as defined in [paragraph (b)(3)](/on/2024-04-11/title-47/section-15.115#p-15.115(b)(3)) of this section, the isolation between the antenna and cable input terminals shall be at least 80 dB from 54 MHz to 216 MHz, at least 60 dB from 216 MHz to 550 MHz and at least 55 dB from 550 MHz to 806 MHz. The 80 dB standard applies at 216 MHz and the 60 dB standard applies at 550 MHz. In the case of a transfer switch requiring a power source, the required isolation shall be maintained in the event the device is not connected to a power source or power is interrupted.
(ii) For all other TV interface devices, the maximum voltage, corresponding to the peak envelope power of the modulated video signal during maximum amplitude peaks, in microvolts, appearing at the receiving antenna input terminals when terminated with a resistance (R in ohms) matching the rated impedance of the antenna input of the switch, shall not exceed 0.346 times the square root of (R).
(iii) Measurement to determine compliance with the transfer switch limits shall be made using a connecting cable, where required, between the TV interface device and the transfer switch of the type and length:
(A) Provided with the TV interface device,
(B) Recommended in the instruction manual, or
(C) Normally employed by the consumer.
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*(2) A TV interface device shall be designed and constructed, to the extent practicable, so as to preclude the possibility that the consumer may inadvertently attach the output of the device to the receiving antenna, if any, without first going through the transfer switch.
(3) A transfer switch is not required for a TV interface device that, when connected, results in the user no longer having any need to receive standard over-the-air broadcast signals via a separate antenna. A transfer switch is not required to be marketed with a cable system terminal device unless that device provides for the connection of an external antenna. A transfer switch is not required for a device that is intended to be used as an accessory to an authorized TV interface device.
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*(4) An actual transfer switch is not required for a TV interface device, including a cable system terminal device, that has an antenna input terminal(s); provided, the circuitry following the antenna input terminal(s) has sufficient bandwidth to allow the reception of all TV broadcast channels authorized under [part 73 of this chapter](/on/2024-04-11/title-47/part-73) and: For a cable system terminal device that can alternate between the reception of cable television service and an antenna, compliance with the isolation requirement specified in [paragraph (c)(1)(i)](/on/2024-04-11/title-47/section-15.115#p-15.115(c)(1)(i)) of this section can be demonstrated; and, for all other TV interface devices, the maximum voltage appearing at the antenna terminal(s) does not exceed the limit in [paragraph (c)(1)(ii)](/on/2024-04-11/title-47/section-15.115#p-15.115(c)(1)(ii)) of this section.
(5) If a transfer switch is not required, the following label shall be used in addition to the label shown in [§ 15.19(a)](/on/2024-04-11/title-47/section-15.19#p-15.19(a)):
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*This device is intended to be attached to a receiver that is not used to receive over-the-air broadcast signals. Connection of this device in any other fashion may cause harmful interference to radio communications and is in violation of the FCC Rules, part 15.
(d) A TV interface device, including a cable system terminal device, shall incorporate circuitry to automatically prevent emanations from the device from exceeding the technical specifications in this part. These circuits shall be adequate to accomplish their functions when the TV interface device is presented, if applicable, with video input signal levels in the range of one to five volts; this requirement is not applicable to a TV interface device that uses a built-in signal source and has no provisions for the connection of an external signal source. For devices that contain provisions for an external signal source but do not contain provisions for the input of an external baseband signal, e.g., some cable system terminal devices, compliance with the provisions of this paragraph shall be demonstrated with a radio frequency input signal of 0 to 25 dBmV.
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*(e) For cable system terminal devices and TV interface devices used with a master antenna, as defined in [paragraph (b)(3)](/on/2024-04-11/title-47/section-15.115#p-15.115(b)(3)) of this section, the holder of the grant of authorization shall specify in the instruction manual or pamphlet, if a manual is not provided, the types of wires or coaxial cables necessary to ensure that the unit complies with the requirements of this part. The holder of the grant of authorization must comply with the provisions of [§ 15.27](/on/2024-04-11/title-47/section-15.27). For all other TV interface devices, the wires or coaxial cables used to couple the output signals to the TV receiver shall be provided by the responsible party.
(f) A TV interface device which is submitted to the Commission as a composite device in a single enclosure containing a RF modulator, video source and other component devices shall be submitted on a single application (FCC Form 731) and shall be authorized as a single device.
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*(g) An external device or accessory that is intended to be attached to a TV interface device shall comply with the technical and administrative requirements set out in the rules under which it operates. For example, a personal computer must be certificated to show compliance with the regulations for digital devices.
(h) Stand-alone switches used to alternate between cable service and an antenna shall provide isolation between the antenna and cable input terminals that is at least 80 dB from 54 MHz to 216 MHz, at least 60 dB from 216 MHz to 550 MHz and at least 55 dB from 550 MHz to 806 MHz. The 80 dB standard applies at 216 MHz and the 60 dB standard applies at 550 MHz. In the case of stand-alone switches requiring a power source, the required isolation shall be maintained in the event the device is not connected to a power source or power is interrupted.
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*(i) Switches and other devices intended to be used to by-pass the processing circuitry of a cable system terminal device, whether internal to such a terminal device or a stand-alone unit, shall not attenuate the input signal more than 6 dB from 54 MHz to 550 MHz, or more than 8 dB from 550 MHz to 804 MHz. The 6 dB standard applies at 550 MHz.
\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989, as amended at [57 FR 33448](https://www.federalregister.gov/citation/57-FR-33448), July 29, 1992; [59 FR 25341](https://www.federalregister.gov/citation/59-FR-25341), May 16, 1994; [61 FR 18509](https://www.federalregister.gov/citation/61-FR-18509), Apr. 26, 1996; [77 FR 4913](https://www.federalregister.gov/citation/77-FR-4913), Feb. 1, 2012\]
#### § 15.117 TV broadcast receivers.
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*(a) All TV broadcast receivers shipped in interstate commerce or imported into the United States, for sale or resale to the public, shall comply with the provisions of this section, except that [paragraphs (f)](/on/2024-04-11/title-47/section-15.117#p-15.117(f)) and [(g)](/on/2024-04-11/title-47/section-15.117#p-15.117(g)) of this section shall not apply to the features of such sets that provide for reception of digital television signals. The reference in this section to TV broadcast receivers also includes devices, such as TV interface devices and set-top devices that are intended to provide audio-video signals to a video monitor, that incorporate the tuner portion of a TV broadcast receiver and that are equipped with an antenna or antenna terminals that can be used for off-the-air reception of TV broadcast signals, as authorized under [part 73 of this chapter](/on/2024-04-11/title-47/part-73).
(b) TV broadcast receivers shall be capable of adequately receiving all channels allocated by the Commission to the television broadcast service that broadcast digital signals using the DTV transmission standard in [§ 73.682(d) of this chapter](/on/2024-04-11/title-47/section-73.682#p-73.682(d)), but need not be capable of receiving analog signals or signals using the Next Gen TV transmission standard in [§ 73.682(f) of this chapter](/on/2024-04-11/title-47/section-73.682#p-73.682(f)).
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*(c) On a given receiver, use of the UHF and VHF tuning systems shall provide approximately the same degree of tuning accuracy with approximately the same expenditure of time and effort: _Provided, however,_ That this requirement will be considered to be met if the need for routine fine tuning is eliminated on UHF channels.
(1) _Basic tuning mechanism._ If a TV broadcast receiver is equipped to provide for repeated access to VHF television channels at discrete tuning positions, that receiver shall be equipped to provide for repeated access to a minimum of six UHF television channels at discrete tuning positions. Unless a discrete tuning position is provided for each channel allocated to UHF television, each position shall be readily adjustable to a particular UHF channel by the user without the use of tools. If 12 or fewer discrete tuning positions are provided, each position shall be adjustable to receive any channel allocated to UHF television.
Note:
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*The combination of detented rotary switch and pushbutton controls is acceptable, provided UHF channels, after their initial selection, can be accurately tuned with an expenditure of time and effort approximately the same as that used in accurately tuning VHF channels. A UHF tuning system comprising five pushbuttons and a separate manual tuning knob is considered to provide repeated access to six channels at discrete tuning positions. A one-knob (VHF/UHF) tuning system providing repeated access to 11 or more discrete tuning positions is also acceptable, provided each of the tuning positions is readily adjustable, without the use of tools, to receive any UHF channel.
(2) _Tuning controls and channel readout._ UHF tuning controls and channel readout on a given receiver shall be comparable in size, location, accessibility and legibility to VHF controls and readout on that receiver.
Note:
Differences between UHF and VHF channel readout that follow directly from the larger number of UHF television channels available are acceptable if it is clear that a good faith effort to comply with the provisions of this section has been made.
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*(d) If equipment and controls that tend to simplify, expedite or perfect the reception of television signals (e.g., AFC, visual aids, remote control, or signal seeking capability referred to generally as tuning aids) are incorporated into the VHF portion of a TV broadcast receiver, tuning aids of the same type and comparable capability and quality shall be provided for the UHF portion of that receiver.
(e) If a television receiver has an antenna affixed to the VHF antenna terminals, it must have an antenna designed for and capable of receiving all UHF television channels affixed to the UHF antenna terminals. If a VHF antenna is provided with but not affixed to a receiver, a UHF antenna shall be provided with the receiver.
(f) The picture sensitivity of a TV broadcast receiver averaged for all channels between 14 and 69 inclusive shall not be more than 8dB larger than the peak picture sensitivity of that receiver averaged for all channels between 2 and 13 inclusive.
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*(g) The noise figure for any television channel 14 to 69 inclusive shall not exceed 14 dB. A TV receiver model is considered to comply with this noise figure if the maximum noise figure for channels 14-69 inclusive of 97.5% of all receivers within that model does not exceed 14 dB.
(1) The responsible party shall measure the noise figure of a number of UHF channels of the test sample to give reasonable assurance that the UHF noise figure for each channel complies with the above limit.
(2) The responsible party shall insert in his files a statement explaining the basis on which it will rely to ensure that at least 97.5% of all production units of the test sample that are manufactured have a noise figure of no greater than 14 dB.
(3) \[Reserved\]
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*(4) In the case of a TV tuner built-in as part of a video tape recorder that uses a power splitter between the antenna terminals of the video tape recorder and the input terminals of the TV tuner or a TV broadcast receiver that uses a power splitter between the antenna terminals of two or more UHF tuners contained within that receiver, 4 dB may be subtracted from the noise figure measured at the antenna terminals of the video tape recorder or TV broadcast receiver for determining compliance of the UHF tuner(s) with the 14 dB noise figure limit.
(h) _Digital television reception capability._ TV broadcast receivers are required only to provide useable picture and sound commensurate with their video and audio capabilities when receiving digital television signals.
(i) _Digital television reception requirement._
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*(1) Responsible parties, as defined in [§ 2.909 of this chapter](/on/2024-04-11/title-47/section-2.909), are required to equip with DTV tuners new TV broadcast receivers that are shipped in interstate commerce or imported from any foreign country into the United States and for which they are responsible to comply with the provisions of this section. For purposes of this section, the term “TV broadcast receivers” includes other video devices (videocassette recorders (VCRs), digital video recorders such as hard drive and DVD recorders, etc.) that receive television signals.
(2) The requirement to include digital television reception capability in new TV broadcast receivers does not apply to devices such as mobile telephones and personal digital assistants where such devices do not include the capability to receive TV service on the frequencies allocated for broadcast television service.
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*(j) For a TV broadcast receiver equipped with a cable input selector switch, the selector switch shall provide, in any of its set positions, isolation between the antenna and cable input terminals of at least 80 dB from 54 MHz to 216 MHz, at least 60 dB from 216 MHz to 550 MHz and at least 55 dB from 550 MHz to 806 MHz. The 80 dB standard applies at 216 MHz and the 60 dB standard applies at 550 MHz. In the case of a selector switch requiring a power source, the required isolation shall be maintained in the event the device is not connected to a power source or power is interrupted. An actual switch that can alternate between reception of cable television service and an antenna is not required for a TV broadcast receiver, provided compliance with the isolation requirement specified in this paragraph can be demonstrated and the circuitry following the antenna input terminal(s) has sufficient band-width to allow the reception of all TV broadcast channels authorized under this chapter.
(k) The following requirements apply to all responsible parties, as defined in [§ 2.909 of this chapter](/on/2024-04-11/title-47/section-2.909), and any person that displays or offers for sale or rent television receiving equipment that is not capable of receiving, decoding and tuning digital signals.
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*(1) Such parties and persons shall place conspicuously and in close proximity to such television broadcast receivers a sign containing, in clear and conspicuous print, the Consumer Alert disclosure text required by [paragraph (k)(3)](/on/2024-04-11/title-47/section-15.117#p-15.117(k)(3)) of this section. The text should be in a size of type large enough to be clear, conspicuous and readily legible, consistent with the dimensions of the equipment and the label. The information may be printed on a transparent material and affixed to the screen, if the receiver includes a display, in a manner that is removable by the consumer and does not obscure the picture, or, if the receiver does not include a display, in a prominent location on the device, such as on the top or front of the device, when displayed for sale, or the information in this format may be displayed separately immediately adjacent to each television broadcast receiver offered for sale and clearly associated with the analog-only model to which it pertains.
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*(2) If such parties and persons display or offer for sale or rent such television broadcast receivers via direct mail, catalog, or electronic means, they shall prominently display in close proximity to the images or descriptions of such television broadcast receivers, in clear and conspicuous print, the Consumer Alert disclosure text required by [paragraph (k)(3)](/on/2024-04-11/title-47/section-15.117#p-15.117(k)(3)) of this section. The text should be in a size large enough to be clear, conspicuous, and readily legible, consistent with the dimensions of the advertisement or description.
(3) _Consumer alert._ This television receiver has only an analog broadcast tuner and will require a converter box after February 17, 2009, to receive over-the-air broadcasts with an antenna because of the Nation's transition to digital broadcasting. Analog-only TVs should continue to work as before with cable and satellite TV services, gaming consoles, VCRs, DVD players, and similar products. For more information, call the Federal Communications Commission at 1-888-225-5322 (TTY: 1-888-835-5322) or visit the Commission's digital television Web site at: _[http://www.dtv.gov](http://www.dtv.gov)._
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*\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1993, as amended at [59 FR 25341](https://www.federalregister.gov/citation/59-FR-25341), May 16, 1994; [61 FR 30532](https://www.federalregister.gov/citation/61-FR-30532), June 17, 1996; [67 FR 63294](https://www.federalregister.gov/citation/67-FR-63294), Oct. 11, 2002; [70 FR 38804](https://www.federalregister.gov/citation/70-FR-38804), July 6, 2005; [70 FR 75743](https://www.federalregister.gov/citation/70-FR-75743), Dec. 21, 2005; [72 FR 26560](https://www.federalregister.gov/citation/72-FR-26560), May 10, 2007; [73 FR 5681](https://www.federalregister.gov/citation/73-FR-5681), Jan. 30, 2008; [77 FR 4913](https://www.federalregister.gov/citation/77-FR-4913), Feb. 1, 2012; [81 FR 5052](https://www.federalregister.gov/citation/81-FR-5052), Feb. 1, 2016; [83 FR 5021](https://www.federalregister.gov/citation/83-FR-5021), Feb. 2, 2018\]
#### § 15.118 Cable ready consumer electronics equipment.
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*(a) All consumer electronics TV receiving equipment marketed in the United States as cable ready or cable compatible shall comply with the provisions of this section. Consumer electronics TV receiving equipment that includes features intended for use with cable service but does not fully comply with the provisions of this section are subject to the labelling requirements of [§ 15.19(d)](/on/2024-04-11/title-47/section-15.19#p-15.19(d)). Until such time as generally accepted testing standards are developed, [paragraphs (c)](/on/2024-04-11/title-47/section-15.118#p-15.118(c)) and [(d)](/on/2024-04-11/title-47/section-15.118#p-15.118(d)) of this section will apply only to the analog portion of covered consumer electronics TV receiving equipment
(b) Cable ready consumer electronics equipment shall be capable of receiving all NTSC or similar video channels on channels 1 through 125 of the channel allocation plan set forth in CEA-542-B: “CEA Standard: Cable Television Channel Identification Plan,” (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38)).
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*(c) Cable ready consumer electronics equipment must meet the following technical performance requirements. Compliance with these requirements shall be determined by performing measurements at the unfiltered IF output port. Where appropriate, the Commission will consider allowing alternative measurement methods.
(1) _Adjacent channel interference._ In the presence of a lower adjacent channel CW signal that is 1.5 MHz below the desired visual carrier in frequency and 10 dB below the desired visual carrier in amplitude, spurious signals within the IF passband shall be attenuated at least 55 dB below the visual carrier of the desired signal. The desired input signal shall be an NTSC visual carrier modulated with a 10 IRE flat field with color burst and the aural carrier which is 10 dB below the visual carrier should be unmodulated. Measurements are to be performed for input signal levels of 0 dBmV and + 15 dBmV, with the receiver tuned to ten evenly spaced EIA IS-132 channels covering the band 54 MHz to 804 MHz.
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*(2) _Image channel interference._ Image channel interference within the IF passband shall be attenuated below the visual carrier of the desired channel by at least 60 dB from 54 MHz to 714 MHz and 50 dB from 714 MHz to 804 MHz. The 60 dB standard applies at 714 MHz. In testing for compliance with this standard, the desired input signal is to be an NTSC signal on which the visual carrier is modulated with a 10 IRE flat field with color burst and the aural carrier is unmodulated and 10 dB below the visual carrier. The undesired test signal shall be a CW signal equal in amplitude to the desired visual carrier and located 90 MHz above the visual carrier frequency of the desired channel. Measurements shall be performed for input signals of 0 dBmV and + 15 dBmV, with the receiver tuned to at least ten evenly spaced EIA IS-132 channels covering the band 54 MHz to 804 MHz.
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*(3) _Direct pickup interference._ The direct pickup (DPU) of a co-channel interfering ambient field by a cable ready device shall not exceed the following criteria. The ratio of the desired to undesired signal levels at the IF passband on each channel shall be at least 45 dB. The average ratio over the six channels shall be at least 50 dB. The desired input signal shall be an NTSC signal having a visual carrier level of 0 dBmV. The visual carrier is modulated with a 10 IRE flat field with color burst, visual to aural carrier ratio of 10 dB, aural carrier unmodulated. The equipment under test (EUT) shall be placed on a rotatable table that is one meter in height. Any excess length of the power cord and other connecting leads shall be coiled on the floor under the table. The EUT shall be immersed in a horizontally polarized uniform CW field of 100 mV/m at a frequency 2.55 MHz above the visual carrier of the EUT tuned channel. Measurements shall be made with the EUT tuned to six EIA IS-132 channels, two each in the low VHF, high VHF and UHF broadcast bands. On each channel, the levels at the IF passband due to the desired and interfering signals are to be measured.
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*(4) _Tuner overload._ Spurious signals within the IF passband shall be attenuated at least 55 dB below the visual carrier of the desired channel using a comb-like spectrum input with each visual carrier signal individually set at + 15 dBmV from 54 to 550 MHz. The desired input signal is to be an NTSC signal on which the visual carrier is modulated with a 10 IRE flat field with color burst and the aural carrier is unmodulated and 10 dB below the visual carrier. Measurements shall be made with the receiver tuned to at least seven evenly spaced EIA IS-132 channels covering the band 54 MHz to 550 MHz. In addition, spurious signals within the IF passband shall be attenuated at least 51 dB below the visual carrier of the desired channel using a comb spectrum input with each signal individually set at + 15 dBmV from 550 to 804 MHz. Measurements shall be made with the receiver tuned to at least three evenly spaced EIA IS-132 channels covering the band 550 MHz to 804 MHz.
(5) _Cable input conducted emissions._
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*(i) Conducted spurious emissions that appear at the cable input to the device must meet the following criteria. The input shall be an NTSC video carrier modulated with a 10 IRE flat field with color burst at a level of 0 dBmV and with a visual to aural ratio of 10 dB. The aural carrier shall be unmodulated. The peak level of the spurious signals will be measured using a spectrum analyzer connected by a directional coupler to the cable input of the equipment under test. Spurious signal levels must not exceed the limits in the following table:
From 54 MHz up to and including 300 MHz-26 dBmV
From 300 MHz up to and including 450 MHz-20 dBmV
From 450 MHz up to and including 804 MHz-15 dBmV
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*(ii) The average of the measurements on multiple channels from 450 MHz up to and including 804 MHz shall be no greater than −20 dBmV. Measurements shall be made with the receiver tuned to at least four EIA IS-132 channels in each of the above bands. The test channels are to be evenly distributed across each of the bands. Measurements for conducted emissions caused by sources internal to the device are to be made in a shielded room. Measurements for conducted emissions caused by external signal sources shall be made in an ambient RF field whose field strength is 100 mV/m, following the same test conditions as described in [paragraph (c)(3)](/on/2024-04-11/title-47/section-15.118#p-15.118(c)(3)) of this section.
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*(d) The field strength of radiated emissions from cable ready consumer electronics equipment shall not exceed the limits in [§ 15.109(a)](/on/2024-04-11/title-47/section-15.109#p-15.109(a)) when measured in accordance with the applicable procedures specified in [§§ 15.31](/on/2024-04-11/title-47/section-15.31) and [15.35](/on/2024-04-11/title-47/section-15.35) for unintentional radiators, with the following modifications. During testing the NTSC input signal level is to be + 15 dBmV, with a visual to aural ratio of 10 dB. The visual carrier is to be modulated by a 10 IRE flat field with color burst; the aural carrier is to be unmodulated. Measurements are to be taken on six EIA IS-132 channels evenly spaced across the required RF input range of the equipment under test.
\[[59 FR 25341](https://www.federalregister.gov/citation/59-FR-25341), May 16, 1994, as amended at [61 FR 18509](https://www.federalregister.gov/citation/61-FR-18509), Apr. 26, 1996; [65 FR 64391](https://www.federalregister.gov/citation/65-FR-64391), Oct. 27, 2000; [68 FR 68546](https://www.federalregister.gov/citation/68-FR-68546), Dec. 9, 2003; [69 FR 2849](https://www.federalregister.gov/citation/69-FR-2849), Jan. 21, 2004; [69 FR 57861](https://www.federalregister.gov/citation/69-FR-57861), Sept. 28, 2004; [77 FR 4913](https://www.federalregister.gov/citation/77-FR-4913), Feb. 1, 2012\]
#### § 15.119 \[Reserved\]
#### § 15.120 Program blocking technology requirements for television receivers.
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*(a) Effective July 1, 1999, manufacturers of television broadcast receivers as defined in [section 15.3(w) of this chapter](/on/2024-04-11/title-47/section-15.3#p-15.3(w)), including personal computer systems meeting that definition, must ensure that one-half of their product models with picture screens 33 cm (13 in) or larger in diameter shipped in interstate commerce or manufactured in the United States comply with the provisions of [paragraphs (c)](/on/2024-04-11/title-47/section-15.120#p-15.120(c)), [(d)](/on/2024-04-11/title-47/section-15.120#p-15.120(d)), and [(e)](/on/2024-04-11/title-47/section-15.120#p-15.120(e)) of this section.
Note:
This paragraph places no restrictions on the shipping or sale of television receivers that were manufactured before July 1999.
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*(b) All TV broadcast receivers as defined in [§ 15.3(w)](/on/2024-04-11/title-47/section-15.3#p-15.3(w)), including personal computer systems meeting that definition, with picture screens 33 cm (13 in) or larger, measured diagonally, or with displays in the 16:9 aspect ratio that are 19.8 cm (7.8 in) or greater in height and digital television receivers without an associated display device shipped in interstate commerce or manufactured in the United States shall comply with the provisions of [paragraphs (c)](/on/2024-04-11/title-47/section-15.120#p-15.120(c)), [(d)](/on/2024-04-11/title-47/section-15.120#p-15.120(d)), and [(e)](/on/2024-04-11/title-47/section-15.120#p-15.120(e)) of this section.
(c) _Transmission format._
(1) Analog television program rating information shall be transmitted on line 21 of field 2 of the vertical blanking interval of television signals, in accordance with [§ 73.682(a)(22) of this chapter](/on/2024-04-11/title-47/section-73.682#p-73.682(a)(22)).
(2) Digital television program rating information shall be transmitted in digital television signals in accordance with [§ 73.682(d) of this chapter](/on/2024-04-11/title-47/section-73.682#p-73.682(d)).
(d) _Operation._
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*(1) Analog television receivers will receive program ratings transmitted pursuant to EIA-744: “Transport of Content Advisory Information Using Extended Data Service (XDS)” (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38)) and EIA-608: “Recommended Practice for Line 21 Data Service” (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38)). Blocking of programs shall occur when a program rating is received that meets the pre-determined user requirements.
(2) Digital television receivers shall react in a similar manner as analog televisions when programmed to block specific rating categories. Digital television receivers will receive program rating descriptors transmitted pursuant to industry standard EIA/CEA-766-A “U.S. and Canadian Region Rating Tables (RRT) and Content Advisory Descriptors for Transport of Content Advisory Information using ATSC A/65-A Program and System Information Protocol (PSIP),” 2001 (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38)). Blocking of programs shall occur when a program rating is received that meets the pre-determined user requirements. Digital television receivers shall be able to respond to changes in the content advisory rating system.
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*(e) All television receivers as described in [paragraph (a)](/on/2024-04-11/title-47/section-15.120#p-15.120(a)) of this section shall block programming as follows:
(1) _Channel Blocking._ Channel Blocking should occur as soon as a program rating packet with the appropriate Content Advisory or MPAA rating level is received. Program blocking is described as a receiver performing all of the following:
• Muting the program audio.
• Rendering the video black or otherwise indecipherable.
• Eliminating program-related captions.
(2) _Default State._ The default state of a receiver (_i.e._, as provided to the consumer) should not block unrated programs. However, it is permissible to include features that allow the user to reprogram the receiver to block programs that are not rated.
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*(3) _Picture-In-Picture (PIP)._ If a receiver has the ability to decode program-related rating information for the Picture-In-Picture (PIP) video signal, then it should block the PIP channel in the same manner as the main channel. If the receiver does not have the ability to decode PIP program-related rating information, then it should block or otherwise disable the PIP if the viewer has enabled program blocking.
(4) _Selection of Ratings._ Each television receiver, in accordance with user input, shall block programming based on the age based ratings, the content based ratings, or a combination of the two.
(i) If the user chooses to block programming according to its age based rating level, the receiver must have the ability to automatically block programs with a more restrictive age based rating. For example, if all shows with an age-based rating of TV-PG have been selected for blocking, the user should be able to automatically block programs with the more restrictive ratings of TV-14 and TV-MA.
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*(ii) If the user chooses to block programming according to a combination of age based and content based ratings the receiver must have the ability to automatically block programming with a more restrictive age rating but a similar content rating. For example, if all shows rated TV-PG-V have been selected for blocking, the user should be able to block automatically shows with the more restrictive ratings of TV-14-V and TV-MA-V.
(iii) The user should have the capability of overriding the automatic blocking described in [paragraphs (e)(4)(i)](/on/2024-04-11/title-47/section-15.120#p-15.120(e)(4)(i)) and [(4)(ii)](/on/2024-04-11/title-47/section-15.120#p-15.120(4)(ii)) of this section.
\[[63 FR 20133](https://www.federalregister.gov/citation/63-FR-20133), Apr. 23, 1998, as amended at [68 FR 68546](https://www.federalregister.gov/citation/68-FR-68546), Dec. 9, 2003; [69 FR 2849](https://www.federalregister.gov/citation/69-FR-2849), Jan. 21, 2004; [69 FR 59534](https://www.federalregister.gov/citation/69-FR-59534), Oct. 4, 2004; [73 FR 5682](https://www.federalregister.gov/citation/73-FR-5682), Jan. 30, 2008; [74 FR 63079](https://www.federalregister.gov/citation/74-FR-63079), Dec. 2, 2009; [77 FR 4913](https://www.federalregister.gov/citation/77-FR-4913), Feb. 1, 2012\]
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*#### § 15.121 Scanning receivers and frequency converters used with scanning receivers.
(a) Except as provided in [paragraph (c)](/on/2024-04-11/title-47/section-15.121#p-15.121(c)) of this section, scanning receivers and frequency converters designed or marketed for use with scanning receivers, shall:
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*(1) Be incapable of operating (tuning), or readily being altered by the user to operate, within the frequency bands allocated to the Cellular Radiotelephone Service in [part 22 of this chapter](/on/2024-04-11/title-47/part-22) (cellular telephone bands). Scanning receivers capable of “readily being altered by the user” include, but are not limited to, those for which the ability to receive transmissions in the cellular telephone bands can be added by clipping the leads of, or installing, a simple component such as a diode, resistor or jumper wire; replacing a plug-in semiconductor chip; or programming a semiconductor chip using special access codes or an external device, such as a personal computer. Scanning receivers, and frequency converters designed for use with scanning receivers, also shall be incapable of converting digital cellular communication transmissions to analog voice audio.
(2) Be designed so that the tuning, control and filtering circuitry is inaccessible. The design must be such that any attempts to modify the equipment to receive transmissions from the Cellular Radiotelephone Service likely will render the receiver inoperable.
(b) Except as provided in [paragraph (c)](/on/2024-04-11/title-47/section-15.121#p-15.121(c)) of this section, scanning receivers shall reject any signals from the Cellular Radiotelephone Service frequency bands that are 38 dB or lower based upon a 12 dB SINAD measurement, which is considered the threshold where a signal can be clearly discerned from any interference that may be present.
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*(c) Scanning receivers and frequency converters designed or marketed for use with scanning receivers, are not subject to the requirements of [paragraphs (a)](/on/2024-04-11/title-47/section-15.121#p-15.121(a)) and [(b)](/on/2024-04-11/title-47/section-15.121#p-15.121(b)) of this section provided that they are manufactured exclusively for, and marketed exclusively to, entities described in [18 U.S.C. 2512(2)](https://www.govinfo.gov/link/uscode/18/2512), or are marketed exclusively as test equipment pursuant to [§ 15.3(dd)](/on/2024-04-11/title-47/section-15.3#p-15.3(dd)).
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*(d) Modification of a scanning receiver to receive transmissions from Cellular Radiotelephone Service frequency bands will be considered to constitute manufacture of such equipment. This includes any individual, individuals, entity or organization that modifies one or more scanners. Any modification to a scanning receiver to receive transmissions from the Cellular Radiotelephone Service frequency bands voids the certification of the scanning receiver, regardless of the date of manufacture of the original unit. In addition, the provisions of [§ 15.23](/on/2024-04-11/title-47/section-15.23) shall not be interpreted as permitting modification of a scanning receiver to receiver Cellular Radiotelephone Service transmissions.
(e) Scanning receivers and frequency converters designed for use with scanning receivers shall not be assembled from kits or marketed in kit form unless they comply with the requirements in [paragraph (a)](/on/2024-04-11/title-47/section-15.121#p-15.121(a)) through [(c)](/on/2024-04-11/title-47/section-15.121#p-15.121(c)) of this section.
(f) Scanning receivers shall have a label permanently affixed to the product, and this label shall be readily visible to the purchaser at the time of purchase. The label shall read as follows: WARNING: MODIFICATION OF THIS DEVICE TO RECEIVE CELLULAR RADIOTELEPHONE SERVICE SIGNALS IS PROHIBITED UNDER FCC RULES AND FEDERAL LAW.
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*(1) “Permanently affixed” means that the label is etched, engraved, stamped, silkscreened, indelible printed or otherwise permanently marked on a permanently attached part of the equipment or on a nameplate of metal, plastic or other material fastened to the equipment by welding, riveting, or permanent adhesive. The label shall be designed to last the expected lifetime of the equipment in the environment in which the equipment may be operated and must not be readily detachable. The label shall not be a stick-on, paper label.
(2) When the device is so small that it is not practicable to place the warning label on it, the information required by this paragraph shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user and shall also be placed on the container in which the device is marketed. However, the FCC identifier must be displayed on the device.
\[[64 FR 22561](https://www.federalregister.gov/citation/64-FR-22561), Apr. 27, 1999, as amended at [66 FR 32582](https://www.federalregister.gov/citation/66-FR-32582), June 15, 2001\]
#### § 15.122 \[Reserved\]
#### § 15.123 Labeling of digital cable ready products.
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*(a) The requirements of this section shall apply to unidirectional digital cable products. Unidirectional digital cable products are one-way devices that accept a Point of Deployment module (POD) and which include, but are not limited to televisions, set-top-boxes and recording devices connected to digital cable systems. Unidirectional digital cable products do not include interactive two-way digital television products.
(b) A unidirectional digital cable product may not be labeled with or marketed using the term “digital cable ready,” or other terminology that describes the device as “cable ready” or “cable compatible,” or otherwise indicates that the device accepts a POD or conveys the impression that the device is compatible with digital cable service unless it implements at a minimum the following features:
(1) Tunes NTSC analog channels transmitted in-the-clear.
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*(2) Tunes digital channels that are transmitted in compliance with SCTE 40 2003 (formerly DVS 313): “Digital Cable Network Interface Standard” (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38)), provided, however, that with respect to Table B.11 of that standard, the phase noise requirement shall be −86 dB/Hz including both in-the-clear channels and channels that are subject to conditional access.
(3) Allows navigation of channels based on channel information (virtual channel map and source names) provided through the cable system in compliance with ANSI/SCTE 65 2002 (formerly DVS 234): “Service Information Delivered Out-of-Band for Digital Cable Television” (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38)), and/or PSIP-enabled navigation (ANSI/SCTE 54 2003 (formerly DVS 241): “Digital Video Service Multiplex and Transport System Standard for Cable Television” (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38))).
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*(4) Includes the POD-Host Interface specified in SCTE 28 2003 (formerly DVS 295): “Host-POD Interface Standard” (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38)), and SCTE 41 2003 (formerly DVS 301): “POD Copy Protection System” (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38)), or implementation of a more advanced POD-Host Interface based on successor standards. Support for Internet protocol flows is not required.
(5) Responds to emergency alerts that are transmitted in compliance with ANSI/SCTE 54 2003 (formerly DVS 241): “Digital Video Service Multiplex and Transport System Standard for Cable Television” (incorporated by reference, _see_ [§ 15.38](/on/2024-04-11/title-47/section-15.38)).
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*(6) In addition to the requirements of [paragraphs (b)(1)](/on/2024-04-11/title-47/section-15.123#p-15.123(b)(1)) through [(5)](/on/2024-04-11/title-47/section-15.123#p-15.123(b)(5)) of this section, a unidirectional digital cable television may not be labeled or marketed as digital cable ready or with other terminology as described in [paragraph (b)](/on/2024-04-11/title-47/section-15.123#p-15.123(b)) of this section, unless it includes a DTV broadcast tuner as set forth in [§ 15.117(i)](/on/2024-04-11/title-47/section-15.117#p-15.117(i)) and employs at least one interface specified in [paragraphs (b)(6)(i)](/on/2024-04-11/title-47/section-15.123#p-15.123(b)(6)(i)) and [(ii)](/on/2024-04-11/title-47/section-15.123#p-15.123(b)(6)(ii)) of this section:
(i) For 480p grade unidirectional digital cable televisions, either a DVI/HDCP, HDMI/HDCP, or 480p Y,Pb,Pr interface.
(ii) For 720p/1080i grade unidirectional digital cable televisions, either a DVI/HDCP or HDMI/HDCP interface.
(c) Before a manufacturer's or importer's first unidirectional digital cable product may be labeled or marketed as digital cable ready or with other terminology as described in [paragraph (b)](/on/2024-04-11/title-47/section-15.123#p-15.123(b)) of this section, the manufacturer or importer shall verify the device as follows:
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*(1) The manufacturer or importer shall have a sample of its first model of a unidirectional digital cable product tested to show compliance with the procedures set forth in Uni-Dir-PICS-I01-030903: Uni-Directional Receiving Device: Conformance Checklist: PICS Proforma (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) at a qualified test facility. If the model fails to comply, the manufacturer or importer shall have any modifications to the product to correct failures of the procedures in Uni-Dir-PICS-I01-030903: “Uni-Directional Receiving Device: Conformance Checklist: PICS Proforma,” September 3, 2003 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) retested at a qualified test facility and the product must comply with Uni-Dir-PICS-I01-030903: “Uni-Directional Receiving Device: Conformance Checklist: PICS Proforma,” September 3, 2003 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) in accordance with the test procedures set forth in Uni-Dir-ATP-I02-040225: “Uni-Directional Receiving Device, Acceptance Test Plan,” February 25, 2004 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38))*
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*or with M-UDCP-PICS-I04-080225, “Uni-Directional Cable Product Supporting M-Card: Multiple Profiles; Conformance Checklist: PICS,” February 25, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) in accordance with the test procedures set forth in TP-ATP-M-UDCP-I05-20080304, “Uni-Directional Digital Cable Products Supporting M-Card; M-UDCP Device Acceptance Test Plan,” March 4, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) before the product or any related model may be labeled or marketed. If the manufacturer or importer's first unidirectional digital cable product is not a television, then that manufacturer or importer's first model of a unidirectional digital cable product which is a television shall be tested pursuant to this subsection as though it were the first unidirectional digital cable product. A qualified test facility may only require compliance with the procedures set forth in Uni-Dir-PICS-I01-030903: Uni-Directional*
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*Receiving Device: Conformance Checklist: PICS Proforma, September 3, 2003 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)). Compliance testing beyond those procedures shall be at the discretion of the manufacturer or importer.
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*(2) A qualified test facility is a testing laboratory representing cable television system operators serving a majority of the cable television subscribers in the United States or an appropriately qualified independent laboratory with adequate equipment and competent personnel knowledgeable with respect to Uni-Dir-PICS-I01-030903: “Uni-Directional Receiving Device: Conformance Checklist: PICS Proforma,” September 03, 2003 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)); Uni-Dir-ATP-I02-040225: “Uni-Directional Receiving Device, Acceptance Test Plan,” February 25, 2004 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)); M-UDCP-PICS-I04-080225, “Uni-Directional Cable Product Supporting M-Card: Multiple Profiles; Conformance Checklist: PICS,” February 25, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)); and TP-ATP-M-UDCP-I05-20080304, “Uni-Directional Digital Cable Products Supporting M-Card; M-UDCP Device Acceptance Test Plan,” March 4, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)). For any independent testing laboratory to be qualified hereunder such laboratory must ensure that all its decisions are impartial and have a documented structure which safeguards impartiality of the operations of the testing laboratory. In addition, any independent testing laboratory qualified hereunder must not supply or design products of the type it tests, nor provide any other products or services that could compromise confidentiality, objectivity or impartiality of the testing laboratory's testing process and decisions.
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*(3) Subsequent to the testing of its initial unidirectional digital cable product model, a manufacturer or importer is not required to have other models of unidirectional digital cable products tested at a qualified test facility for compliance with the procedures of Uni-Dir-PICS-I01-030903: “Uni-Directional Receiving Device: Conformance Checklist: PICS Proforma,” September 03, 2003 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) unless the first model tested was not a television, in which event the first television shall be tested as provided in [paragraph (c)(1)](/on/2024-04-11/title-47/section-15.123#p-15.123(c)(1)) of this section. The manufacturer or importer shall ensure that all subsequent models of unidirectional digital cable products comply with the procedures in the Uni-Dir-PICS-I01-030903: “Uni-Directional Receiving Device: Conformance Checklist: PICS Proforma,” September 03, 2003 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) and all other applicable rules and standards. The manufacturer or importer shall maintain records indicating*
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*such compliance in accordance with Supplier's Declaration of Conformity requirements in [part 2, subpart J of this chapter](/on/2024-04-11/title-47/part-2/subpart-J). The manufacturer or importer shall further submit documentation demonstrating compliance with the procedures in the Uni-Dir-PICS-I01-030903: “Uni-Directional Receiving Device: Conformance Checklist: PICS Proforma,” September 03, 2003 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) to the qualified test facility.
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*(4) Unidirectional digital cable product models must be tested for compliance with Uni-Dir-PICS-I01-030903: “Uni-Directional Receiving Device: Conformance Checklist: PICS Proforma,” September 3, 2003 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) in accordance with Uni-Dir-ATP-I02-040225: “Uni-Directional Receiving Device Acceptance Test Plan,” February 25, 2004, (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) or an equivalent test procedure that produces identical pass/fail test results. In the event of any dispute over the applicable results under an equivalent test procedure, the results under Uni-Dir-ATP-I02-040225: “Uni-Directional Receiving Device Acceptance Test Plan,” February 25, 2004 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) shall govern.
(5) This paragraph applies to unidirectional digital cable product models which utilize Point-of-Deployment modules (PODs) in multi-stream mode (M-UDCPs).
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*(i) The manufacturer or importer shall have a sample of its first model of a M-UDCP tested at a qualified test facility to show compliance with M-UDCP-PICS-I04-080225, “Uni-Directional Cable Product Supporting M-Card: Multiple Profiles; Conformance Checklist: PICS,” February 25, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) as specified in the procedures set forth in TP-ATP-M-UDCP-I05-20080304, “Uni-Directional Digital Cable Products Supporting M-Card; M-UDCP Device Acceptance Test Plan,” March 4, 2008 (both references incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)). If the model fails to comply, the manufacturer or importer shall have retested, at a qualified test facility, a product that complies with Uni-Dir-PICS-I01-030903: “Uni-Directional Receiving Device: Conformance Checklist: PICS Proforma,” September 03, 2003 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) in accordance with Uni-Dir-ATP-I02-040225: “Uni-Directional Receiving Device Acceptance Test Plan,” February 25, 2004, (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) or an equivalent test procedure that produces identical pass/fail test results before any product or related model may be labeled or marketed. If the manufacturer or importer's first M-UDCP is not a television, then that manufacturer or importer's first model of a M-UDCP which is a television shall be tested pursuant to this subsection*
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*as though it were the first M-UDCP.
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*(ii) A qualified test facility is a testing laboratory representing cable television system operators serving a majority of the cable television subscribers in the United States or an appropriately qualified independent laboratory with adequate equipment and competent personnel knowledgeable with Uni-Dir-PICS-I01-030903: “Uni-Directional Receiving Device: Conformance Checklist: PICS Proforma,” September 03, 2003 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)); Uni-Dir-ATP-I02-040225: “Uni-Directional Receiving Device, Acceptance Test Plan,” February 25, 2004 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)); M-UDCP-PICS-I04-080225, “Uni-Directional Cable Product Supporting M-Card: Multiple Profiles; Conformance Checklist: PICS,” February 25, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)); and TP-ATP-M-UDCP-I05-20080304, “Uni-Directional Digital Cable Products Supporting M-Card; M-UDCP Device Acceptance Test Plan,” March 4, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)). For any independent testing laboratory to be qualified hereunder such laboratory must ensure that all its decisions are impartial and have a documented structure which safeguards impartiality of the operations of the testing laboratory. In addition, any independent testing laboratory qualified hereunder must not supply or design products of the type it tests, nor provide any other products or services that could compromise confidentiality, objectivity or impartiality of the testing laboratory's testing process and decisions.
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*(iii) Subsequent to the successful testing of its initial M-UDCP, a manufacturer or importer is not required to have other M-UDCP models tested at a qualified test facility for compliance with M-UDCP-PICS-I04-080225, “Uni-Directional Cable Product Supporting M-Card: Multiple Profiles; Conformance Checklist: PICS,” February 25, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) unless the first model tested was not a television, in which event the first television shall be tested as provided in [paragraph (c)(5)(i)](/on/2024-04-11/title-47/section-15.123#p-15.123(c)(5)(i)) of this section. The manufacturer or importer shall ensure that all subsequent models of M-UDCPs comply with M-UDCP-PICS-I04-080225, “Uni-Directional Cable Product Supporting M-Card: Multiple Profiles; Conformance Checklist: PICS,” February 25, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) and all other applicable rules and standards. The manufacturer or importer shall maintain records indicating such compliance in accordance with Supplier's Declaration of Conformity requirements in [part 2, subpart J of this chapter](/on/2024-04-11/title-47/part-2/subpart-J). For each M-UDCP model, the manufacturer or importer shall further submit documentation demonstrating compliance with M-UDCP-PICS-I04-080225,*
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*“Uni-Directional Cable Product Supporting M-Card: Multiple Profiles; Conformance Checklist: PICS,” February 25, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) to the qualified test facility.
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*(iv) M-UDCPs must be in compliance with M-UDCP-PICS-I04-080225, “Uni-Directional Cable Product Supporting M-Card: Multiple Profiles; Conformance Checklist: PICS,” February 25, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) in accordance with the procedures set forth in TP-ATP-M-UDCP-I05-20080304, “Uni-Directional Digital Cable Products Supporting M-Card; M-UDCP Device Acceptance Test Plan,” March 4, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) or an equivalent test procedure that produces identical pass/fail test results. In the event of any dispute over the applicable results under an equivalent test procedure, the results under TP-ATP-M-UDCP-I05-20080304, “Uni-Directional Digital Cable Products Supporting M-Card; M-UDCP Device Acceptance Test Plan,” March 4, 2008 (incorporated by reference, see [§ 15.38](/on/2024-04-11/title-47/section-15.38)) shall govern.
(d) Manufacturers and importers shall provide in appropriate post-sale material that describes the features and functionality of the product, such as the owner's guide, the following language: “This digital television is capable of receiving analog basic, digital basic and digital premium cable television programming by direct connection to a cable system providing such programming. A security card provided by your cable operator is required to view encrypted digital programming. Certain advanced and interactive digital cable services such as video-on-demand, a cable operator's enhanced program guide and data-enhanced television services may require the use of a set-top box. For more information call your local cable operator.”
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*\[[68 FR 66733](https://www.federalregister.gov/citation/68-FR-66733), Nov. 28, 2003, as amended at [76 FR 40277](https://www.federalregister.gov/citation/76-FR-40277), July 8, 2011; [77 FR 4914](https://www.federalregister.gov/citation/77-FR-4914), Feb. 1, 2012; [82 FR 50833](https://www.federalregister.gov/citation/82-FR-50833), Nov. 2, 2017\]
Subpart C—Intentional Radiators
-------------------------------
#### § 15.201 Equipment authorization requirement.
(a) Intentional radiators operated as carrier current systems, devices operated under the provisions of [§§ 15.211](/on/2024-04-11/title-47/section-15.211), [15.213](/on/2024-04-11/title-47/section-15.213), and [15.221](/on/2024-04-11/title-47/section-15.221), and devices operating below 490 kHz in which all emissions are at least 40 dB below the limits in [§ 15.209](/on/2024-04-11/title-47/section-15.209) are subject to Suppliers Declaration of Conformity pursuant to the procedures in [subpart J of part 2 of this chapter](/on/2024-04-11/title-47/part-2/subpart-J) prior to marketing.
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*(b) Except as otherwise exempted in [paragraph (c)](/on/2024-04-11/title-47/section-15.201#p-15.201(c)) of this section and in [§ 15.23](/on/2024-04-11/title-47/section-15.23), all intentional radiators operating under the provisions of this part shall be certified by the Telecommunication Certification Bodies pursuant to the procedures in [subpart J of part 2 of this chapter](/on/2024-04-11/title-47/part-2/subpart-J) prior to marketing.
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*(c) For devices such as perimeter protection systems which, in accordance with [§ 15.31(d)](/on/2024-04-11/title-47/section-15.31#p-15.31(d)), are required to be measured at the installation site, each application for certification must be accompanied by a statement indicating that the system has been tested at three installations and found to comply at each installation. Until such time as certification is granted, a given installation of a system that was measured for the submission for certification will be considered to be in compliance with the provisions of this chapter, including the marketing regulations in [subpart I of part 2 of this chapter](/on/2024-04-11/title-47/part-2/subpart-I), if tests at that installation show the system to be in compliance with the relevant technical requirements. Similarly, where measurements must be performed on site for equipment subject to Supplier's Declaration of Conformity, a given installation that has been found compliant with the applicable standards will be considered to be in compliance with the provisions of this chapter, including the marketing regulations in [subpart I of part 2 of this chapter](/on/2024-04-11/title-47/part-2/subpart-I).
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*(d) For perimeter protection systems operating in the frequency bands allocated to television broadcast stations operating under [part 73 of this chapter](/on/2024-04-11/title-47/part-73), the holder of the grant of certification must test each installation prior to initiation of normal operation to verify compliance with the technical standards and must maintain a list of all installations and records of measurements. For perimeter protection systems operating outside of the frequency bands allocated to television broadcast stations, upon receipt of a grant of certification, further testing of the same or similar type of system or installation is not required.
\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989, as amended at [68 FR 68546](https://www.federalregister.gov/citation/68-FR-68546), Dec. 9, 2003; [82 FR 50834](https://www.federalregister.gov/citation/82-FR-50834), Nov. 2, 2017\]
#### § 15.202 Certified operating frequency range.
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*Client devices that operate in a master/client network may be certified if they have the capability of operating outside permissible part 15 frequency bands, provided they operate on only permissible part 15 frequencies under the control of the master device with which they communicate. Master devices marketed within the United States must be limited to operation on permissible part 15 frequencies. Client devices that can also act as master devices must meet the requirements of a master device. For the purposes of this section, a master device is defined as a device operating in a mode in which it has the capability to transmit without receiving an enabling signal. In this mode it is able to select a channel and initiate a network by sending enabling signals to other devices. A network always has at least one device operating in master mode. A client device is defined as a device operating in a mode in which the transmissions of the device are under control of the master. A device in client mode is not able to initiate a network.
\[[70 FR 23040](https://www.federalregister.gov/citation/70-FR-23040), May 4, 2005\]
#### § 15.203 Antenna requirement.
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*An intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator shall be considered sufficient to comply with the provisions of this section. The manufacturer may design the unit so that a broken antenna can be replaced by the user, but the use of a standard antenna jack or electrical connector is prohibited. This requirement does not apply to carrier current devices or to devices operated under the provisions of [§§ 15.211](/on/2024-04-11/title-47/section-15.211), [15.213](/on/2024-04-11/title-47/section-15.213), [15.217](/on/2024-04-11/title-47/section-15.217), [15.219](/on/2024-04-11/title-47/section-15.219), [15.221](/on/2024-04-11/title-47/section-15.221), or [§ 15.236](/on/2024-04-11/title-47/section-15.236). Further, this requirement does not apply to intentional radiators that must be professionally installed, such as perimeter protection systems and some field disturbance sensors, or to other intentional radiators which, in accordance with [§ 15.31(d)](/on/2024-04-11/title-47/section-15.31#p-15.31(d)), must be measured at the installation site. However, the installer shall be responsible for ensuring that the proper antenna is employed so that the limits*
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*in this part are not exceeded.
\[[82 FR 41559](https://www.federalregister.gov/citation/82-FR-41559), Sept. 1, 2017\]
#### § 15.204 External radio frequency power amplifiers and antenna modifications.
(a) Except as otherwise described in [paragraphs (b)](/on/2024-04-11/title-47/section-15.204#p-15.204(b)) and [(d)](/on/2024-04-11/title-47/section-15.204#p-15.204(d)) of this section, no person shall use, manufacture, sell or lease, offer for sale or lease (including advertising for sale or lease), or import, ship, or distribute for the purpose of selling or leasing, any external radio frequency power amplifier or amplifier kit intended for use with a part 15 intentional radiator.
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*(b) A transmission system consisting of an intentional radiator, an external radio frequency power amplifier, and an antenna, may be authorized, marketed and used under this part. Except as described otherwise in this section, when a transmission system is authorized as a system, it must always be marketed as a complete system and must always be used in the configuration in which it was authorized.
(c) An intentional radiator may be operated only with the antenna with which it is authorized. If an antenna is marketed with the intentional radiator, it shall be of a type which is authorized with the intentional radiator. An intentional radiator may be authorized with multiple antenna types. Exceptions to the following provisions, if any, are noted in the rule section under which the transmitter operates, e.g., [§ 15.255(b)(1)(ii) of this part](/on/2024-04-11/title-47/part-15/section-15.255#p-15.255(b)(1)(ii)).
(1) The antenna type, as used in this paragraph, refers to antennas that have similar in-band and out-of-band radiation patterns.
(2) Compliance testing shall be performed using the highest gain antenna for each type of antenna to be certified with the intentional radiator. During this testing, the intentional radiator shall be operated at its maximum available output power level.
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*(3) Manufacturers shall supply a list of acceptable antenna types with the application for equipment authorization of the intentional radiator.
(4) Any antenna that is of the same type and of equal or less directional gain as an antenna that is authorized with the intentional radiator may be marketed with, and used with, that intentional radiator. No retesting of this system configuration is required. The marketing or use of a system configuration that employs an antenna of a different type, or that operates at a higher gain, than the antenna authorized with the intentional radiator is not permitted unless the procedures specified in [§ 2.1043 of this chapter](/on/2024-04-11/title-47/section-2.1043) are followed.
(d) Except as described in this paragraph, an external radio frequency power amplifier or amplifier kit shall be marketed only with the system configuration with which it was approved and not as a separate product.
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*(1) An external radio frequency power amplifier may be marketed for individual sale provided it is intended for use in conjunction with a transmitter that operates in the 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz bands pursuant to [§ 15.247 of this part](/on/2024-04-11/title-47/part-15/section-15.247) or a transmitter that operates in the 5.725-5.825 GHz band pursuant to [§ 15.407 of this part](/on/2024-04-11/title-47/part-15/section-15.407). The amplifier must be of a design such that it can only be connected as part of a system in which it has been previously authorized. (The use of a non-standard connector or a form of electronic system identification is acceptable.) The output power of such an amplifier must not exceed the maximum permitted output power of its associated transmitter.
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*(2) The outside packaging and user manual for external radio frequency power amplifiers sold in accordance with [paragraph (d)(1)](/on/2024-04-11/title-47/section-15.204#p-15.204(d)(1)) of this section must include notification that the amplifier can be used only in a system which it has obtained authorization. Such a notice must identify the authorized system by FCC Identifier.
\[[69 FR 54034](https://www.federalregister.gov/citation/69-FR-54034), Sept. 7, 2004, as amended at [78 FR 59850](https://www.federalregister.gov/citation/78-FR-59850), Sept. 30, 2013\]
#### § 15.205 Restricted bands of operation.
(a) Except as shown in [paragraph (d)](/on/2024-04-11/title-47/section-15.205#p-15.205(d)) of this section, only spurious emissions are permitted in any of the frequency bands listed below:
MHz
MHz
MHz
GHz
0.090-0.110
16.42-16.423
399.9-410
4.5-5.15
1 0.495-0.505
16.69475-16.69525
608-614
5.35-5.46
2.1735-2.1905
16.80425-16.80475
960-1240
7.25-7.75
4.125-4.128
25.5-25.67
1300-1427
8.025-8.5
4.17725-4.17775
37.5-38.25
1435-1626.5
9.0-9.2
4.20725-4.20775
73-74.6
1645.5-1646.5
9.3-9.5
6.215-6.218
74.8-75.2
1660-1710
10.6-12.7
6.26775-6.26825
108-121.94
1718.8-1722.2
13.25-13.4
6.31175-6.31225
123-138
2200-2300
14.47-14.5
8.291-8.294
149.9-150.05
2310-2390
15.35-16.2
8.362-8.366
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*156.52475-156.52525
2483.5-2500
17.7-21.4
8.37625-8.38675
156.7-156.9
2690-2900
22.01-23.12
8.41425-8.41475
162.0125-167.17
3260-3267
23.6-24.0
12.29-12.293
167.72-173.2
3332-3339
31.2-31.8
12.51975-12.52025
240-285
3345.8-3358
36.43-36.5
12.57675-12.57725
322-335.4
3600-4400
(2)
13.36-13.41
1 Until February 1, 1999, this restricted band shall be 0.490-0.510 MHz.
2 Above 38.6
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*(b) Except as provided in [paragraphs (d)](/on/2024-04-11/title-47/section-15.205#p-15.205(d)) and [(e)](/on/2024-04-11/title-47/section-15.205#p-15.205(e)) of this section, the field strength of emissions appearing within these frequency bands shall not exceed the limits shown in [§ 15.209](/on/2024-04-11/title-47/section-15.209). At frequencies equal to or less than 1000 MHz, compliance with the limits in [§ 15.209](/on/2024-04-11/title-47/section-15.209) shall be demonstrated using measurement instrumentation employing a CISPR quasi-peak detector. Above 1000 MHz, compliance with the emission limits in [§ 15.209](/on/2024-04-11/title-47/section-15.209) shall be demonstrated based on the average value of the measured emissions. The provisions in [§ 15.35](/on/2024-04-11/title-47/section-15.35) apply to these measurements.
(c) Except as provided in [paragraphs (d)](/on/2024-04-11/title-47/section-15.205#p-15.205(d)) and [(e)](/on/2024-04-11/title-47/section-15.205#p-15.205(e)) of this section, regardless of the field strength limits specified elsewhere in this subpart, the provisions of this section apply to emissions from any intentional radiator.
(d) The following devices are exempt from the requirements of this section:
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*(1) Swept frequency field disturbance sensors operating between 1.705 and 37 MHz provided their emissions only sweep through the bands listed in [paragraph (a)](/on/2024-04-11/title-47/section-15.205#p-15.205(a)) of this section, the sweep is never stopped with the fundamental emission within the bands listed in [paragraph (a)](/on/2024-04-11/title-47/section-15.205#p-15.205(a)) of this section, and the fundamental emission is outside of the bands listed in [paragraph (a)](/on/2024-04-11/title-47/section-15.205#p-15.205(a)) of this section more than 99% of the time the device is actively transmitting, without compensation for duty cycle.
(2) Transmitters used to detect buried electronic markers at 101.4 kHz which are employed by telephone companies.
(3) Cable locating equipment operated pursuant to [§ 15.213](/on/2024-04-11/title-47/section-15.213).
(4) Any equipment operated under the provisions of [§§ 15.255](/on/2024-04-11/title-47/section-15.255) and [15.256](/on/2024-04-11/title-47/section-15.256) in the frequency band 75-85 GHz, [§ 15.257](/on/2024-04-11/title-47/section-15.257) in the 92-95 GHz band or [§ 15.258](/on/2024-04-11/title-47/section-15.258).
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*(5) Biomedical telemetry devices operating under the provisions of [§ 15.242 of this part](/on/2024-04-11/title-47/part-15/section-15.242) are not subject to the restricted band 608-614 MHz but are subject to compliance within the other restricted bands.
(6) Transmitters operating under the provisions of [subparts D](/on/2024-04-11/title-47/part-15/subpart-D) or [F of this part](/on/2024-04-11/title-47/part-15/subpart-F).
(7) Devices operated pursuant to [§ 15.225](/on/2024-04-11/title-47/section-15.225) are exempt from complying with this section for the 13.36-13.41 MHz band only.
(8) Devices operated in the 24.075-24.175 GHz band under [§ 15.245](/on/2024-04-11/title-47/section-15.245) are exempt from complying with the requirements of this section for the 48.15-48.35 GHz and 72.225-72.525 GHz bands only, and shall not exceed the limits specified in [§ 15.245(b)](/on/2024-04-11/title-47/section-15.245#p-15.245(b)).
(9) Devices operated in the 24.0-24.25 GHz band under [§ 15.249](/on/2024-04-11/title-47/section-15.249) are exempt from complying with the requirements of this section for the 48.0-48.5 GHz and 72.0-72.75 GHz bands only, and shall not exceed the limits specified in [§ 15.249(a)](/on/2024-04-11/title-47/section-15.249#p-15.249(a)).
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*(10) White space devices operating under [subpart H of this part](/on/2024-04-11/title-47/part-15/subpart-H) are exempt from complying with the requirements of this section for the 608-614 MHz band.
(e) Harmonic emissions appearing in the restricted bands above 17.7 GHz from field disturbance sensors operating under the provisions of [§ 15.245](/on/2024-04-11/title-47/section-15.245) shall not exceed the limits specified in [§ 15.245(b)](/on/2024-04-11/title-47/section-15.245#p-15.245(b)).
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*\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989, as amended at [55 FR 46791](https://www.federalregister.gov/citation/55-FR-46791), Nov. 7, 1990; [56 FR 6288](https://www.federalregister.gov/citation/56-FR-6288), Feb. 15, 1991; [57 FR 13048](https://www.federalregister.gov/citation/57-FR-13048), Apr. 15, 1992; [58 FR 33774](https://www.federalregister.gov/citation/58-FR-33774), June 21, 1993; [60 FR 28068](https://www.federalregister.gov/citation/60-FR-28068), May 30, 1995; [61 FR 14503](https://www.federalregister.gov/citation/61-FR-14503), Apr. 2, 1996; [62 FR 4655](https://www.federalregister.gov/citation/62-FR-4655), Jan. 31, 1997; [62 FR 58658](https://www.federalregister.gov/citation/62-FR-58658), Oct. 30, 1997; [67 FR 34855](https://www.federalregister.gov/citation/67-FR-34855), May 16, 2002; [68 FR 68546](https://www.federalregister.gov/citation/68-FR-68546), Dec. 9, 2003; [69 FR 3265](https://www.federalregister.gov/citation/69-FR-3265), Jan. 23, 2004; [69 FR 72031](https://www.federalregister.gov/citation/69-FR-72031), Dec. 10, 2004; [79 FR 12678](https://www.federalregister.gov/citation/79-FR-12678), Mar. 6, 2014; [80 FR 73069](https://www.federalregister.gov/citation/80-FR-73069), Nov. 23, 2015; [84 FR 25691](https://www.federalregister.gov/citation/84-FR-25691), June 4, 2019\]
#### § 15.207 Conducted limits.
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*(a) Except as shown in [paragraphs (b)](/on/2024-04-11/title-47/section-15.207#p-15.207(b)) and [(c)](/on/2024-04-11/title-47/section-15.207#p-15.207(c)) of this section, for an intentional radiator that is designed to be connected to the public utility (AC) power line, the radio frequency voltage that is conducted back onto the AC power line on any frequency or frequencies, within the band 150 kHz to 30 MHz, shall not exceed the limits in the following table, as measured using a 50 μH/50 ohms line impedance stabilization network (LISN). Compliance with the provisions of this paragraph shall be based on the measurement of the radio frequency voltage between each power line and ground at the power terminal. The lower limit applies at the boundary between the frequency ranges.
Frequency of emission (MHz)
Conducted limit (dBμV)
Quasi-peak
Average
0.15-0.5
66 to 56\*
56 to 46\*
0.5-5
56
46
5-30
60
50
\*Decreases with the logarithm of the frequency.
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(b) The limit shown in [paragraph (a)](/on/2024-04-11/title-47/section-15.207#p-15.207(a)) of this section shall not apply to carrier current systems operating as intentional radiators on frequencies below 30 MHz. In lieu thereof, these carrier current systems shall be subject to the following standards:
(1) For carrier current system containing their fundamental emission within the frequency band 535-1705 kHz and intended to be received using a standard AM broadcast receiver: no limit on conducted emissions.
(2) For all other carrier current systems: 1000 μV within the frequency band 535-1705 kHz, as measured using a 50 μH/50 ohms LISN.
(3) Carrier current systems operating below 30 MHz are also subject to the radiated emission limits in [§ 15.205](/on/2024-04-11/title-47/section-15.205), [§ 15.209](/on/2024-04-11/title-47/section-15.209), [§ 15.221](/on/2024-04-11/title-47/section-15.221), [§ 15.223](/on/2024-04-11/title-47/section-15.223), or [§ 15.227](/on/2024-04-11/title-47/section-15.227), as appropriate.
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(c) Measurements to demonstrate compliance with the conducted limits are not required for devices which only employ battery power for operation and which do not operate from the AC power lines or contain provisions for operation while connected to the AC power lines. Devices that include, or make provisions for, the use of battery chargers which permit operating while charging, AC adapters or battery eliminators or that connect to the AC power lines indirectly, obtainig their power through another device which is connected to the AC power lines, shall be tested to demonstrate compliance with the conducted limits.
\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989, as amended at [56 FR 373](https://www.federalregister.gov/citation/56-FR-373), Jan. 4, 1991; [57 FR 33448](https://www.federalregister.gov/citation/57-FR-33448), July 29, 1992; [58 FR 51249](https://www.federalregister.gov/citation/58-FR-51249), Oct. 1, 1993; [67 FR 45671](https://www.federalregister.gov/citation/67-FR-45671), July 10, 2002\]
#### § 15.209 Radiated emission limits; general requirements.
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(a) Except as provided elsewhere in this subpart, the emissions from an intentional radiator shall not exceed the field strength levels specified in the following table:
Frequency (MHz)
Field strength (microvolts/meter)
Measurement distance (meters)
0.009-0.490
2400/F(kHz)
300
0.490-1.705
24000/F(kHz)
30
1.705-30.0
30
30
30-88
100 \*\*
3
88-216
150 \*\*
3
216-960
200 \*\*
3
Above 960
500
3
\*\* Except as provided in paragraph (g), fundamental emissions from intentional radiators operating under this section shall not be located in the frequency bands 54-72 MHz, 76-88 MHz, 174-216 MHz or 470-806 MHz. However, operation within these frequency bands is permitted under other sections of this part, e.g., [§§ 15.231](/on/2024-04-11/title-47/section-15.231) and [15.241](/on/2024-04-11/title-47/section-15.241).
(b) In the emission table above, the tighter limit applies at the band edges.
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(c) The level of any unwanted emissions from an intentional radiator operating under these general provisions shall not exceed the level of the fundamental emission. For intentional radiators which operate under the provisions of other sections within this part and which are required to reduce their unwanted emissions to the limits specified in this table, the limits in this table are based on the frequency of the unwanted emission and not the fundamental frequency. However, the level of any unwanted emissions shall not exceed the level of the fundamental frequency.
(d) The emission limits shown in the above table are based on measurements employing a CISPR quasi-peak detector except for the frequency bands 9-90 kHz, 110-490 kHz and above 1000 MHz. Radiated emission limits in these three bands are based on measurements employing an average detector.
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(e) The provisions in [§§ 15.31](/on/2024-04-11/title-47/section-15.31), [15.33](/on/2024-04-11/title-47/section-15.33), and [15.35](/on/2024-04-11/title-47/section-15.35) for measuring emissions at distances other than the distances specified in the above table, determining the frequency range over which radiated emissions are to be measured, and limiting peak emissions apply to all devices operated under this part.
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(f) In accordance with [§ 15.33(a)](/on/2024-04-11/title-47/section-15.33#p-15.33(a)), in some cases the emissions from an intentional radiator must be measured to beyond the tenth harmonic of the highest fundamental frequency designed to be emitted by the intentional radiator because of the incorporation of a digital device. If measurements above the tenth harmonic are so required, the radiated emissions above the tenth harmonic shall comply with the general radiated emission limits applicable to the incorporated digital device, as shown in [§ 15.109](/on/2024-04-11/title-47/section-15.109) and as based on the frequency of the emission being measured, or, except for emissions contained in the restricted frequency bands shown in [§ 15.205](/on/2024-04-11/title-47/section-15.205), the limit on spurious emissions specified for the intentional radiator, whichever is the higher limit. Emissions which must be measured above the tenth harmonic of the highest fundamental frequency designed to be emitted by the intentional radiator and which fall within the restricted bands shall comply with the general radiated emission limits in [§ 15.109](/on/2024-04-11/title-47/section-15.109) that are applicable to the incorporated digital device.
(g) Perimeter protection systems may operate in the 54-72 MHz and 76-88 MHz bands under the provisions of this section. The use of such perimeter protection systems is limited to industrial, business and commercial applications.
\[[54 FR 17714](https://www.federalregister.gov/citation/54-FR-17714), Apr. 25, 1989; [54 FR 32339](https://www.federalregister.gov/citation/54-FR-32339), Aug. 7, 1989; [55 FR 18340](https://www.federalregister.gov/citation/55-FR-18340), May 2, 1990; [62 FR 58658](https://www.federalregister.gov/citation/62-FR-58658), Oct. 30, 1997\]
#### § 15.211 Tunnel radio systems.
An intentional radiator utilized as part of a tunnel radio system may operate on any frequency provided it meets all of the following conditions:
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(a) Operation of a tunnel radio system (intentional radiator and all connecting wires) shall be contained solely within a tunnel, mine or other structure that provides attenuation to the radiated signal due to the presence of naturally surrounding earth and/or water.
(b) Any intentional or unintentional radiator external to the tunnel, mine or other structure, as described in [paragraph (a)](/on/2024-04-11/title-47/section-15.211#p-15.211(a)) of this section, shall be subject to the other applicable regulations contained within this part.
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