1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T K.60 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (12/2015) SERIES K: PROTECTION AGAINST INTERFERENCE Emission levels and test methods for wireline telecommunication networks to minimize electromagnetic disturbance of ra
2、dio services Recommendation ITU-T K.60 Rec. ITU-T K.60 (12/2015) i Recommendation ITU-T K.60 Emission levels and test methods for wireline telecommunication networks to minimize electromagnetic disturbance of radio services Summary The deployment of broadband services fundamentally changes the utili
3、zation of the telecommunication network. First, the transmission is present on the network at all times (i.e., always-on). Second, the transmission frequency range employed by broadband is much greater than that of previous access systems. Hence, the risk of interference with radio services has incr
4、eased. In the event of interference, the share of responsibility between the network operator and the national responsible body, as well as the levels of the radiated field are not clearly defined. Recommendation ITU-T K.60 proposes a measurement method and target levels to guide administrations in
5、case of interference with radio services. In addition, a methodology for solving the interference is discussed, and under what circumstances the case has to be forwarded to the national responsible body. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T K.60 2003-07-29 5 11.10
6、02/1000/6504 2.0 ITU-T K.60 2008-02-29 5 11.1002/1000/9138 2.1 ITU-T K.60 (2008) Amd.1 2009-05-29 5 11.1002/1000/10019 3.0 ITU-T K.60 2015-12-14 5 11.1002/1000/12674 * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommend
7、ations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T K.60 (12/2015) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Tel
8、ecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization
9、 Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technolog
10、y which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance w
11、ith this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligator
12、y language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of
13、this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the d
14、ate of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consu
15、lt the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2016 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T K.60 (12/2015) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitio
16、ns 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 3 5 Procedure regarding the investigation of complaints of radio interference 3 5.1 Procedure 3 5.2 Process for solving the interference case 6 6 Levels for the radiated field strength from t
17、elecommunication networks 6 6.1 Specification of levels 6 6.2 Application of levels . 7 7 Disturbance measurements . 7 7.1 General . 7 7.2 Normalization of measurement results to the standard measurement distance . 8 7.3 Disturbance measurements in the frequency range 9 kHz to 30 MHz . 8 7.4 Disturb
18、ance measurements in the frequency range 30 MHz to 6 000 MHz 9 Appendix I Processing of obtained measuring results and final assessment based on the specified levels 11 I.1 Treatment of measurement uncertainty 11 I.2 Comparison of measurement results with specified levels . 12 Appendix II Frequency
19、band and the required level of protection for safety-related radio service 13 II.1 Aeronautical systems operating between 190 kHz and 1 215 MHz . 13 Bibliography. 14 iv Rec. ITU-T K.60 (12/2015) Introduction This Recommendation discusses emissions of electromagnetic disturbances from wireline teleco
20、mmunication networks, as defined in clause 3, and addresses all parties tasked with investigations of complaints of radio interference. It specifies levels for permissible disturbance emanating from such networks and suitable methods of measurement used for evaluation of individual cases of radio in
21、terference under in situ conditions. Rec. ITU-T K.60 (12/2015) 1 Recommendation ITU-T K.60 Emission levels and test methods for wireline telecommunication networks to minimize electromagnetic disturbance of radio services 1 Scope This Recommendation is intended to guide administrations when consider
22、ing complaints of interference between telecommunication systems. It is not intended to set electromagnetic compatibility (EMC) compliance requirements. All involved parties (including but not limited to network operators, service providers or customers) are recommended to work together for resolvin
23、g these cases. The emission levels and test methods presented apply to: disturbing emissions from wireline telecommunication networks as defined in clause 3; only those frequencies that are launched onto the telecommunication wire-pair as part of the intentional transmission spectrum of the broadban
24、d system1. It covers, but is not restricted to, target levels regarding radiated disturbing emissions for such telecommunication networks as: networks using telecommunication cables and their in-house cabling extensions; networks using the low voltage (LV) alternating current (AC) mains network; com
25、munity antenna TV (CATV) distribution networks. This Recommendation covers the frequency range from 9 kHz to 400 GHz. To date, it specifies target levels for radiated disturbance in the frequency range from 9 kHz to 6 GHz. Application of defined test methods is restricted to the section of the telec
26、ommunication network in the vicinity of the radio interference; it is not necessary to apply the test method to all parts of the telecommunication network. The emission target levels have been selected in order to ensure that disturbances emanating from telecommunication networks do not, in most cas
27、es, exceed a level which could prevent radio communication receivers operating in the near vicinity from functioning as intended. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendati
28、on. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references li
29、sted below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T G.9964 Recommendation ITU-T G.9964 (2011), Unified high-speed wireline-bas
30、ed home networking transceivers Power spectral density specification. 1 It is possible for other signals to couple into the telecommunication network and for these signals to propagate through the network and cause interference to radio reception. The procedure within this Recommendation addresses t
31、his possibility. 2 Rec. ITU-T K.60 (12/2015) ITU-T K.48 Recommendation ITU-T K.48 (2006), EMC requirements for telecommunication equipment Product family Recommendation. ITU-T K.74 Recommendation ITU-T K.74 (2008), EMC, resistibility and safety requirements for home network devices. ITU-T K.76 Recom
32、mendation ITU-T K.76 (2008), EMC requirements for telecommunication network equipment (9 kHz-150 kHz). IEC CISPR 16-1-1 IEC CISPR 16-1-1:2015, Specification for radio disturbance and immunity measuring apparatus and methods Part 1-1: Radio disturbance and immunity measuring apparatus Measuring appar
33、atus. IEC CISPR 32 IEC CISPR 32:2015, Electromagnetic compatibility of multimedia equipment Emission requirements. IEC 60050-161 IEC 60050-161 (1990), International Electrotechnical Vocabulary. Chapter 161: Electromagnetic compatibility. 3 Definitions 3.1 Terms defined elsewhere This Recommendation
34、uses the following terms defined elsewhere: 3.1.1 disturbance field strength IEC 60050-161, IEV 161-04-02: The field strength produced at a given location by an electromagnetic disturbance, measured under specified conditions. 3.1.2 electromagnetic disturbance IEC 60050-161, IEV 161-01-05: Any elect
35、romagnetic phenomenon that may degrade the performance of a device, equipment or system, or adversely affect living or inert matter. NOTE An electromagnetic disturbance may be an electromagnetic noise, an unwanted signal, or a change in the propagation medium itself. 3.1.3 emission IEC 60050-161, IE
36、V 161-01-08: The phenomenon by which electromagnetic energy emanates from a source. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 antenna reference point: The geometric centre of the antenna or the reference point referred to in the antenna calibrati
37、on procedure. 3.2.2 intentional signal: The intentional signal comprises the frequency spectrum required for the communication in and along conductors. 3.2.3 network cable: The cable infrastructure (transmission line) used to connect together telecom installations, systems and telecom terminal equip
38、ment. The network cable will normally end at a network termination point (NTP). At this point, telecom terminal equipment or telecom systems or installations are attached. The network cable may also include in-premises extension cables or LAN cables. 3.2.4 standard measurement distance: Measurement
39、distance for which levels for disturbance are specified in this Recommendation. The measurement distance is taken as a straight line perpendicular from the telecommunication cable tract (or its projection to the floor level), from the boundary of the premises, office, or flat, or from the exterior w
40、all of the building hosting the network concerned, to the measuring antenna reference point. Rec. ITU-T K.60 (12/2015) 3 3.2.5 telecommunication installation: A combination of equipment, systems, finished products and/or components assembled and/or erected by an assembler/installer at a given place
41、to operate together to perform a specific task. 3.2.6 telecommunication network: Entirety of equipment (comprising any combination of the following: network cable, telecom terminal equipment and telecom system or telecom installation) that is indispensable to ensure normal, intended operation of the
42、 telecommunication network. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AC Alternating Current CATV Community Antenna TV EMC Electromagnetic Compatibility IEV International Electrotechnical Vocabulary IT Information Technology ITE Information Techn
43、ology Equipment LAN Local Area Network LV Low Voltage NTE Network Termination Equipment NTP Network Termination Point PNI Public Network Interface TTE Telecommunications Terminal Equipment 5 Procedure regarding the investigation of complaints of radio interference 5.1 Procedure In case of complaints
44、 regarding radio interference, the examination should start with a preliminary investigation, as shown in Figure 2, in order to identify the source and coupling path of the radiated disturbance. The preliminary investigation should start at the location of the interfered-with radio receiver and/or a
45、ntenna of the victim of interference, or in its vicinity. There, the disturbance actually causing the radio interference will be detected using a portable receiver with a suitable signal-level indicator. Once the relevant disturbance is detected, it will be necessary to use the portable receiver or
46、other convenient tracing techniques in order to identify that part of the network and, subsequently, to identify the location of the source of the disturbance. During the preliminary investigation, it is not necessary to assess the disturbance potential of the emissions emanating from the telecommun
47、ication network. The indication of the portable receiver is solely used to find directions and to trace the source of the disturbance. No specific measurement distances are defined for the preliminary identification of the source of interference. Deviations from the preliminary measurement processes
48、 are permitted, if necessary. Depending on the results of this preliminary investigation, either the provisions of this Recommendation, or the provisions of the EMC product standard relevant to the identified source of radiated disturbance, apply for the assessment of the individual case of radio in
49、terference. 4 Rec. ITU-T K.60 (12/2015) If the result of the preliminary investigation cannot verify that the source of the radiated disturbance is a telecommunication network, then this Recommendation is not applicable. Once the source of interference is identified, then the part causing radio interference is assessed following the measurement procedures set out in clause 7. The basic process, as shown in Figure 2, should be used to solve the interference case by reducing the emissions from the network until the target levels
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