Applying the New CISPR 32 Overview - IEEEsites.ieee.org/ctx-emcs/files/2015/04/2013_02_13-Presentation.pdf · ִThe limit lines match CISPR 22 limits, ... Shall be calculated in accordance

Sept. 2012 Applying the new CISPR 32 1 Copyright 2012

Applying the New CISPR 32

Overview

Central Texas EMC Chapter Meeting

13 February 2013

Presented by:

Don Heirman

Don HEIRMAN Consultants

Sept. 2012 2 Copyright 2012

CISPR 32 Applicability

� Multimedia equipment (MME) operating at an rms value of 600 V (ac or dc)

� Includes equipment within scopes of CISPR 13 or 22

� Both private and professional use equipment covered

� Excludes application to transmitter emissions including spurious emissions from transmitter operation

� If other CISPR standards are applicable, those standards are used

� CISPR 32 cannot be used for in-situ measurements

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Test Planning Overview

� Step 1: Identify the ports on the EUT

� Step 2: Determine whether the EUT is Class A or B

� Step 3: From Annex A, determine what tests apply

� Step 4: Identify the primary functions of the EUT

� Step 5: Select AE or simulators (Annex D, clause D.1.1)

� Step 6: Using Annex B, determine the operating mode(s)

� Step 7: With Annex D, set the EUT/AE arrangement(s)

� Step 8: Perform the tests based on Annex C proceduresAnnex E also describes pre-scan measurements

� Step 9: Report results as summarized in Annex F

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1: Scope

� Objectives:

Establishes requirements to provide adequate level of protection of radio spectrum, allowing radio services to operate as intended in the frequency range 9 kHz to 400 GHz

Specify procedures to ensure reproducibility of emission measurements and repeatability of test results

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2: References

� All shown are normative

Clear citing of basic measurement methods, test instrumentation (including antennas), test site validation, and measurement uncertainty included in CISPR Pub 16 standards.

International electrotechnical vocabulary (chapter 161)

Conducted immunity measurements

ANSI C63.5 for antenna calibration

ISO/IEC 17025 for competence of testing and cal labs

IEEE 802.3 for carrier sense multiple access with collision detection access method and physical layer specifications

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3: Terms, Definitions, Abbreviations

� 30 definitions—Examples:

Ports (Mains power, analog/digital data, antenna, DC network power, enclosure, optical fiber, wired network, signal/control, RF modulator output, and broadcast receiver tuner)

Others: arrangement, configuration, primary function, etc.

� 66 abbreviations—Examples

AC-3 (digital audio compression)

Many digital video examples

FSOATS (free space open area test site)

POE (power over Ethernet)

VSB (Vestigial side band)

etc.

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4: Classification of Equipment

� Class B: Give protection to broadcast (radio) services within a residential environment; broadcast receivers are considered a product that must meeting Class B limits

� Class A: Covers anything that is not considered needing to meet Class B limits

� Actual requirements (limits) are in Annex A

� Note: Equipment meeting class A limits may not offer adequate protection to broadcast services within a residential environment

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5: Requirements

� Clause 5 directs the reader to Annex A for requirements

To be discussed in a few moments

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6: Measurements

�When doing test planning, remember that a single port may fit more than one port ‘type’ definition

� The old ‘Host – Peripheral’ model is no longer used

� The concept of a ‘Host’ applies when discussing modules that are installed into a host or mounted onto a host

Optional cards mounted inside the chassis

Integrated devices like hard disk drives

Devices plugged in through the enclosure surface

Certain external devices like an IR Remote Control

� ‘Maximize’ the arrangement and cable placement

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7: Equipment Documentation

� Tell the User about any special measures, such as grounding or special cables, needed for EMC compliance

� CISPR 32 contains a ‘Class A’ statement for product manuals

There are discussions about revising this statement to allow better flexibility

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8: Applicability

� Tests above 1 GHz are the same as in CISPR 22 today

These rules on frequency cutoffs generally match what is required by the FCC, but stop at 6 GHz

The limit lines match CISPR 22 limits, which are lower than the FCC from 1-3 GHz

Emissions from receiver local oscillators have different rules

Highest Internal Frequency (Fx)

Highest measuredFrequency

Up to 108 MHz 1 GHz

108 MHz to 500 MHZ 2 GHz

500 MHz to 1 GHz 5 GHz

Above 1 GHz 5•Fx, but not above 6 GHz

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9: Test Reports

� Follows closely ISO/IEC 17025, Clause 5.10

� Facilitate reproducibility of test

� Clearly indicate which limit (Class A or B) was met

Report 6 highest emissions respect to the limit

No need to report emission more than 10 dB below limit.

Identify the port tested

Whether is conducted or radiated emissions

Show margin with respect to the limit at frequencies measured

� No need to report antenna polarization or turntable azimuth where maximum radiated emission occurs

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9: Test Reports

� Record:

Highest frequency source in EUT

Measure radiated emissions up to 6 GHz

Calculated measurement uncertainty

Specific asymmetric artificial network (AAN)

Radiated emission measurement distance

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10: Compliance with publication

� EUT complies if meets appropriate limits

In fact meeting limits indicates meeting requirements between 9 kHz and 400 GHz

Compliance

Is based only on the emission from the EUT; emissions from associated equipment should be minimized

Can also be shown:

• Using another allowed test method and meeting its associated limit; manufacturer can choose

• Measuring EUT’s emissions when operating its functions simultaneously, individually in turn or in any combo

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11: Measurement Uncertainty

� Shall be calculated in accordance with CISPR 16-4-2 and entered into test report

� It is not taken into account in the determination of EUT compliance

� Future amendment to CISPR 32 may require adjusting measured levels if the MU of lab is greater than the target value indicated in 16-4-2

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A: Requirements

� Mains Voltage

Pick a voltage around 110V and one around 230 V

50 Hz or 60 Hz is OK

� There are special limits for Local Oscillator harmonics from broadcast receivers

� Limits based on Peak, QP and Average detectors

Just like CISPR 22

The RMS-Avg detector may be implemented in a future revision

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A: Requirements

� Test the emissions above 1 GHz in FSOATS

FSOATS is defined by performance, not construction

OATS with absorber on ground screen

Semianechoic chamber (SAC) with floor absorber

Fully anechoic room (FAR)

� Telcom Port conducted disturbance tests

Includes radio/TV tuner ports

Includes fiber optic ports with metal strain relief

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B: Exercising the EUT

� Don’t focus on exercising the AE unless it is related to an EUT function

� Test Ethernet at its highest data rate

Testing lower speed rates is not required

10% loading is only required for 10Base-T operation

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B: Exercising the EUT

� The preferred image on a video display is Color Bars

The Scrolling H Text image is for text-only displays

You can do half Color Bar – half Scrolling H and get good results

We are working to resolve this incompatibility with ANSI C63.4

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C: Measurement Procedures,

Instrumentation, and supporting information

� Reliance on CISPR 16 basic standards

� Antennas calibrated using ANSI C63.5-2006

� Introduced HID (Human Interface Device)

� Shall use inverse distance extrapolation if measurement at other than distances indicated

� Minimum separation below 1 GHz is 3 meters; above 1 GHz is 1 meter

� Separation distance reference is in next slide

� Introduces 5 m separation distance and its NSA

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Separation Distance

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C: Measurement Procedures,

Instrumentation, and supporting information

� Prescan measurement is optional (See Annex E)

� Prescan decision process for Quasipeak, Peak and Average provided

� Final measurements now called “formal” measurements

� Details on conducted emission measurements for multi-pair cables

�Where no AAN (ISN) is used, a current probe and capacitive voltage probe must be used

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D: Arrangement of EUT, Local AE and

associated cabling

� Typical arrangement/normal practice

� Extensive discussion on cable length and bundling

� Table top, floor standing, and combination

� External power supply for table top EUT placed on table; extension cords OK

� Identifies special arrangements, e.g. test typical port of similar multiple ports

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associated cabling

� Provides extensive table of arrangement spacing, distances and tolerances

Spacing/distance tolerances generally 10%

Specific tolerances that are not 10%, e.g.

Table top height is +/- 1 cm

Test separation distance is +/- 10 cm

� Reference ground plane for CE measurements has 40 and 80 cm option

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associated cabling

� Series of test setup figures provided

� Examples to follow

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Combination CE setup

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Combination RE setup

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E: Pre-scan Measurements

� Pre-scan is optional

Annex E is Informative, not Normative

� Pre-scan is encouraged

Allows identification of worst-case elements prior to final test

Allows reasonable changes in test process to optimize testing

� If pre-scan is not used, maximization is still required

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F: Test Report Contents

� Annex F is Informative

The actual reporting requirements are scattered throughout the standard

� It is a convenient place to find a list of what belongs in the test report

Includes references to specific clauses of both CISPR 32 and ISO/IEC 17025

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G: Support Information

� Annex G related to Telecom Port conducted emission tests

Annex G is Informative

� Annex G includes

Sample schematics for AANs used in telecom port conducted disturbance tests

Rationale for the methods, limits, and test equipment

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CISPR 32 Bibliography

� The documents listed in the Bibliography are useful and helpful in performing tests

� These documents are referred to elsewhere in the standard

� These documents do not define normative requirements

Normative references are found in Clause 2

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CISPR 32 Ongoing work

� Two corrigenda have been published

March 2012: corrects an error only in the French translation

August 2012: corrects errors in labeling footnote references

� The next revisions of CISPR 32 may include…

Home satellite receiver test methods

Reverberation chamber and GTEM test methods

FAR limits and methods below 1 GHz

Full application of Measurement Uncertainty in deciding Pass/Fail

RMS Average Detector limits below 30 MHz

CM Impedance control on cables existing test area

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CISPR 35 Overview

� CISPR 35 will be the Immunity standard for Multimedia equipment It is in the first round of voting

If accepted, CISPR 35 could be published as early as 2013

� CISPR 24 requirements are based on what a product IS CALLED Telephone, Printer, LAN hub, Scanner, Data processing equipment

� CISPR 35 requirements are based on what a product DOES Output sound, Print images, Send data, Scan images, Manipulate data

� This function-based approach addresses the new ways products are being created and integrated from varied technologies

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Relations between Old/New Standards

� CISPR 13 (Receiver Emissions) and CISPR 22 (ITE Emissions) remain in place

� CISPR 20 (Receiver Immunity) and CISPR 24 (ITE Immunity) remain in place

� CISPR 32 takes the place of CISPR 13 and CISPR 22

� CISPR 35 (not yet published) takes the place of CISPR 20 and CISPR 24

� ANSI C63.4 covers emission measurement procedures (not limits which are given by the FCC). CISPR 22 contains most of what is in C63.4. CISPR 32 has similar procedures to that in C63.4. Significant differences will be covered in the 2-day workshop

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Relations between Old/New Standards

� Standards are voluntary

� National administrations may reference or adopt or adapt these standards for regulatory purposes

� Certain countries immediately or near immediately adopt the latest edition of a standard or a new standard that replaces a standard.

� Other countries or regions presents a transition period which allows the present standard to continue to be used up to a point where the new or replacement standard is only allowed for use.

� Note that “adaption” means that there may be modifications to the IEC standard made when converted.

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Further info on CISPR 32

Video on CISPRhttp://www.espressoengineering.tv/db-index.asp?vid=CISPR-Report

Webinar on CISPR 32http://wll.com/academy.html

or click on September 2012

Applying the new CISPR 32


� Thank you

�Questions

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Documents

Applying the New CISPR 32 Overview - IEEEsites.ieee.org/ctx-emcs/files/2015/04/2013_02_13-Presentation.pdf · ִThe limit lines match CISPR 22 limits, ... Shall be calculated in accordance