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Publication Number: 300643 Rule Parts:  Publication Date: 07/12/2018
Keyword: Part 15 Intentional and Unintentional Radiator measurement procedures

First Category: Equipment Authorization Process *
Second Category: General [Equipment Authorization Process]

Question:   What measurement procedures should be used for Part 15 EMC compliance testing of intentional and unintentional radiators?


Section 15.31(a) specifies the measurement procedures that are to be used for compliance testing of Part 15 intentional and unintentional radiators as follows:

- MP-2: Measurement of UHF Noise Figures of TV Receivers.

- ANSI C63.4-2014: Unintentional Radiators [excluding subclauses 4.5.3 (monopole antenna), 4.6 (absorbing clamp), 6.2.13 (artificial hand), 8.2.2 (monopole antenna), and clauses 9 (absorbing clamp) and 13 (clicks)];

- ANSI C63.17-2013: Unlicensed Personal Communications Service (UPCS) Devices; and

- ANSI C63.10-2013: Intentional Radiators.

The Equipment Authorization Report and Order FCC 14-208 (docket no. 13-44) updated references to the general measurement procedures for unintentional radiators (ANSI C63.4-2014) and intentional radiators (ANSI C63.10-2013) [Sections 2.910, 15.31(a)]. A one-year transition period was provided in the rules, which required that these standards be used by July 13, 2016 (Section 2.950). Devices tested using the previous editions of these measurement standards and authorized prior to the end of the transition period are not required to be re-tested using the editions of the measurement standards established by FCC 14-208.

The Commission has also issued guidance publications pertaining to compliance testing of Part 15 intentional and unintentional radiators including:

- KDB Publication 414788 on test sites used for radiated emission measurements;

- KDB Publication 746324 concerning use of CISPR 22:1997 radiated emission limits for test data obtained using the required ANSI C63.4-2014 measurement procedures;

- KDB Publication 822428 on calibration of antennas used for performing radiated emission measurements and test site validation;

- KDB Publication 662911 for testing of transmitter using MIMO;.

- KDB Publication 558074 Measuring Digital Transmission Systems (DTS); and

- KDB Publications 789033 and 905462 with guidance for U-NII devices.

In addition to the measurement procedures listed above, other measurement procedures that have been found to be acceptable for performing compliance measurements are listed on the OET equipment authorization measurement procedures page at: (https://www.fcc.gov/general/equipment-authorization-measurement-procedures).

Standard measurement methods with associated measurement procedures are identified by FCC to best facilitate uniform device testing across different laboratories and uniform application processing across TCBs. Where other measurement methods may apply for a device, FCC Laboratory should be consulted in a KDB inquiry to determine that the measurement results will be compatible with FCC measurement procedures [Sections 15.31(b), 2.947(e), KDB Publication 388624 D01];

The FCC Knowledge Database (https://www.fcc.gov/labhelp), and its Major Guidance Publications section (https://apps.fcc.gov/oetcf/kdb/reports/GuidedPublicationList.cfm), contains additional guidance on testing various devices subject to the FCC's rules.

Note 1: Other rules pertinent to compliance testing basic requirements include Sections 15.101, 15.201, 15.31(b) to (q), 15.33, 15.35, 15.37, 15.38, 15.215, 2.1033(b)(6), 2.911(c), and 2.938(b).

Note 2: Part 15 RF devices (intentional radiators) may also be subject to RF exposure compliance testing; see KDB Publications 447498 and 865664.


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