Amendment 1 - Specification for radio disturbance and immunity measuring apparatus and methods - Part 3: CISPR technical reports

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Published
Publication Date
17-Jul-2012
Current Stage
DELPUB - Deleted Publication
Completion Date
21-Oct-2020
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CISPR TR 16-3:2010/AMD1:2012 - Amendment 1 - Specification for radio disturbance and immunity measuring apparatus and methods - Part 3: CISPR technical reports
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CISPR/TR 16-3
Edition 3.0 2012-07
TECHNICAL
REPORT
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
AMENDMENT 1
Specification for radio disturbance and immunity measuring apparatus and
methods –
Part 3: CISPR technical reports
CISPR/TR 16-3:2010/A1:2012(E)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2012 IEC, Geneva, Switzerland

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---------------------- Page: 2 ----------------------
CISPR/TR 16-3
Edition 3.0 2012-07
TECHNICAL
REPORT
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
AMENDMENT 1
Specification for radio disturbance and immunity measuring apparatus and
methods –
Part 3: CISPR technical reports
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
ICS 33.100.10, 33.100.20 ISBN 978-2-83220-226-5

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – TR CISPR 16-3 Amend. 1 © IEC:2012(E)
FOREWORD

This amendment has been prepared by subcommittee A: Radio-interference measurements

and statistical methods, of IEC technical committee CISPR: International special committee

on radio interference.
The text of this amendment is based on the following documents:
DTR Report on voting
CISPR/A/975/DTR CISPR/A/996/RVC

Full information on the voting for the approval of this amendment can be found in the report

on voting indicated in the above table.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
_____________
3.2 Abbreviations
Add the following new abbreviation to the existing list:
LCL Longitudinal conversion loss
Add, after the existing Subclause 4.10, the following new Subclause 4.11:
4.11 Parameters of signals at telecommunication ports
4.11.1 General

The maximum signal levels that can be present at telecommunication ports in differential

mode are dependent upon, and are limited by, the electrical balance or LCL [85], [86], of the

telecommunication ports and the cables or networks to which they are intended to be

connected, if the wanted signals are not to appear as unacceptable disturbances across the

common mode impedance to ground.

The LCL of a signal port, cable or network causes a portion of any differential mode signals

on that port, cable or network to be converted to common mode disturbances, for which a

product standard has defined limits [87], [88], [89]. Common mode disturbances (also called

antenna mode disturbances, because they are a source of radiated disturbances to the

environment) should be limited if interference with the reception of radio signals of all kinds is

to be minimized. Common mode disturbances created at a nominally balanced signal port or

transmission medium, for example a twisted copper pair, should be controlled and limited,

whether or not the port or medium is provided with an overall shield. If a shielded medium is

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TR CISPR 16-3 Amend. 1 © IEC:2012(E) – 3 –

used, deficiencies in the shield itself as well as in the shield connectors, leading perhaps to

significant electrical discontinuities, will allow a portion of the common mode disturbances

created within the shield environment to appear outside the shield.

The worst-case values for balance and LCL quoted in many network specifications are based

upon the desired signal transmission and crosstalk performance of the networks, and do not

necessarily have regard for the control of the common mode disturbances considered in the

product standard.

To ensure that the physical layer specifications for telecommunication networks do not

inadvertently lead to the generation of unacceptable electromagnetic disturbances, it is

essential that the EMC implications of the specifications for some critical parameters be

considered early in the development of the network standards.

To achieve EMC of telecommunication networks employing twisted pair media, the most

important parameters to consider are the:

• levels specified for the wanted transverse or differential mode electrical signals;

• spectral characteristics of the line codes
...

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