Goto Section: 2.945 | 2.948 | Table of Contents
Revised as of September 1, 2021
Goto Year:2020 |
§ 2.947 Measurement procedure.
(a) Test data must be measured in accordance with the following
standards or measurement procedures:
(1) Those set forth in bulletins or reports prepared by the
Commission's Office of Engineering and Technology. These will be issued
as required, and specified in the particular part of the rules where
(2) Those acceptable to the Commission and published by national
engineering societies such as the Electronic Industries Association,
the Institute of Electrical and Electronic Engineers, Inc., and the
American National Standards Institute.
(3) Any measurement procedure acceptable to the Commission may be used
to prepare data demonstrating compliance with the requirements of this
chapter. Advisory information regarding measurement procedures can be
found in the Commission's Knowledge Database, which is available at
(b) Information submitted pursuant to paragraph (a) of this section
shall completely identify the specific standard or measurement
(c) In the case of equipment requiring measurement procedures not
specified in the references set forth in paragraphs (a)(1) through (3)
of this section, the applicant shall submit a detailed description of
the measurement procedures actually used.
(d) A listing of the test equipment used shall be submitted.
(e) If deemed necessary, additional information may be required
concerning the measurement procedures employed in obtaining the data
submitted for equipment authorization purposes.
(f) A composite system is a system that incorporates different devices
contained either in a single enclosure or in separate enclosures
connected by wire or cable. If the individual devices in a composite
system are subject to different technical standards, each such device
must comply with its specific standards. In no event may the measured
emissions of the composite system exceed the highest level permitted
for an individual component. Testing for compliance with the different
standards shall be performed with all of the devices in the system
functioning. If the composite system incorporates more than one antenna
or other radiating source and these radiating sources are designed to
emit at the same time, measurements of conducted and radiated emissions
shall be performed with all radiating sources that are to be employed
(g) For each technical requirement in this chapter, the test report
shall provide adequate test data to demonstrate compliance for the
requirement, or in absence of test data, justification acceptable to
the Commission as to why test data is not required.
[ 42 FR 44987 , Sept. 8, 1977, as amended at 44 FR 39181 , July 5, 1979;
51 FR 12616 , Apr. 14, 1986; 80 FR 33442 , June 12, 2015; 82 FR 50828 ,
Nov. 2, 2017]
Goto Section: 2.945 | 2.948
Goto Year: 2020 |
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