IEEE IEEESTANDARDSASSOCIATION American National Standard for Methods of Measurement of Radio. Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz Amendment 1: Test Site Validation C63 Accredited Standards Committee C63@ - Electromagnetic Compatibility Accredited by the American National Standards Institute IEEE ANSI C63.4a-2017 3Park Avenue New York, NY 10016-5997 (Amendment to ANSI C63.4-2014) USA ANSI C63.4a-2017 (Amendment to ANSI C63.4-2014) American National Standard for Methods of Measurement of Radio- Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz Amendment 1: Test Site Validation Accredited Standards Committee C63Electromagnetic Compatibility Accredited by the American National Standards Institute Secretariat Institute of Electrical and Electronics Engineers, Inc. Approved 15 September 2017 American National Standards Institute C63 R Abstract:U.S.consensus standard methods are specifiedinAnnexD ofthis amendmentfor validating standard test sites and alternative test sites used for measurement of radiated radio- range of 30 MHz to 1 GHz. In addition, various updates are made to equations in 4.5, Annex F, AnnexG,andAnnexN. Keywords: Annex D, ANSI C63.4, normalized site attenuation, NSA, site attenuation, site validation The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyright 2017 by The Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 13 October 2017. Printed in the United States of America. IEEE is a registered trademark in the U.S. Patent & Trademark Ofice, owned by The Institute of Electrical and Electronics Engineers, Incorporated. PDF: ISBN 978-1-5044-4529-0 STD22900 Print: ISBN 978-1-5044-4530-6 STDPD22900 IEEE prohibits discrimination, harassment and bullying. For more information, visit http://www.ieee.org/web/aboutus/whatis/policies/p9-26.html No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. i Copyright @ 2017 IEEE. All rights reserved. American National Standard An American National Standard implies a consensus of those substantially concerned with its scope and provisions. An American National Standard is intended as a guide to aid the manufacturer, the consumer, and the generalpublic.The existence of an American National Standard does not in anyrespect preclude anyone, whether he has approved the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standard. American National Standards are CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures oftheAmericanNational StandardsInstituterequirethat actionbetakentoreaffirm,revise,or withdraw this standard no later than five years from the date of publication. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute Authorization to photocopy portions of any individual standard for internal or personal use is granted by Copyright Clearance Center. To arrange for payment of licensing fee, please contact Copyright Clearance Center, Customer Service, 222 Rosewood Drive, Danvers, MA 01923 USA; (978) 750-8400. Permission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright Clearance Center. Errata the one for ASC C63 (http://www.c63.org/explanations interpretations request.htm), for errata periodically. Interpretations (ASC C63@ standards) Current interpretations are essential to the understanding of all ASC C63 standards. To assist in the meanings of requirements, informative interpretations are available at the following URL: (http://www.c63.org/standards _development.htm). User