Transcript ANSI ASC C63 Subcommittee 1 (Techniques and Developments

Relation to present CISPR
Standards
Don Heirman
Relations between Old/New Standards
 CISPR 13 (Receiver Emissions) and CISPR 22 (ITE Emissions)
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remain in place until withdrawn
CISPR 20 (Receiver Immunity) and CISPR 24 (ITE Immunity)
remain in place until withdrawn
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 was covered in our day and a half workshop
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Major Standards
Organizations
Don Heirman
Using IEC Standards
 IEC standards are voluntary
 National administrations may reference or adopt or adapt these
standards for regulatory purposes
 Note “adaption” means that there may be modifications (common) to
the IEC standard made when converted.
 Certain countries immediately or near immediately adopt the latest
edition of a standard or adopt a totally new standard that is needed
for their use
 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 and
existing standards are withdrawn.
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FCC using ANSI Standards
 US Federal Communications Commission may reference or adopt or
adapt these standards for regulatory purposes
 Note “adaption” means that the FCC may not accept all clauses in the
ANSI standards. There are no modifications per se but the FCC may
have additional requirements on the same subject.
 To formally have ANSI standards referenced, the FCC issues a
Notice of Proposed Rule Making (NPRM) proposing adoption of a
standard
 Public comment is received and depending on acceptance of some
or all of the public comments, either a Further NPRM is issued
(when there are major changes in the rule making requiring another
round of comments) or if the FCC is convinced what is needed after
taking into account comments a Report and Order is issued which is
then US Federal law
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Participation in Standards
Don Heirman
IEC Participation
 Request technical advisor (TA) of the US National
Committee of the IEC technical advisory group (TAG) to
join the IEC committee of interest
 Dave Arnett is CISPR/I TA
 TAG membership is voted by existing TAG members
 If voted to join, pay USNC participation fee
 Comment or provide technical input on subjects
currently being discussed in the IEC subcommittee for
which the TAG is following
 Join IEC working group and attend meetings or
contribute inputs for other TAG members to present for
you
 Meetings are generally once a year
ANSI C63 Participation
 Working group membership is open to all
 Submit request to WG chair
A one time fee may be assessed
Active membership “rules” apply
Expect technical contribution
Membership does not mean being able to ballot on standards
Work largely done by electronic means
 For more influence, join subcommittee; membership is
voted by existing SC members
 Main committee
Does final balloting of standards
Is comprised of organizations and single person companies
Meetings are generally at least twice a year
Regulatory Implications
Don HEIRMAN
Source of FCC Measurement
Procedures
 What Measurement Procedures Should Be Used?
 A number of measurement procedures have been
identified and can be found in:
FCC Rules
Industry Standards
Text of the Report and Order
Public Notice Issued by the Commission
Knowledge Database
 See the FCC Measurement Techniques Web Page for a
listing of measurement procedures:
http://www.fcc.gov/oet/ea/eameasurements.html
FCC Flexibility in Referencing
Standards
 Section 2.947 provides options for the FCC to accept
measurement procedures
 The Commission will accept data which has been
measured in accordance with the following standards or
measurement procedures:
Those set forth in bulletins or reports prepared by the
Commission's Office of Engineering and Technology.
Those acceptable to the Commission and published by national
engineering societies such as the EIA, the IEEE, and ANSI.
Any measurement procedure acceptable to the Commission may
be used to prepare data demonstrating compliance with the
requirements of this chapter.
Use of CISPR 22 Limits
Revision of Part 15 of the Rules to Harmonize
the Standards for Digital Devices with
International Standards
ET Docket 92-152, September 17, 1993
This rulemaking only allows for the use of CISPR 22 (third
edition) limits as an alternative to the radiated emission
limits in the frequency range 30 MHz to 1 GHz.
ET Docket 98-80 (FCC 02-157), May 30, 2002
This rulemaking changed the FCC limits for line conducted
emissions to be the same as the CISPR limits.
Use of CISPR 22 Limits
Radiated Emission Limits
Radiated emission limits in the range 30 MHz to 1
GHz may be used as alternative limits to limits in
§15.109.
Section 15.109(g)
“Digital devices may be shown to comply with the standards
contained in the Third Edition of CISPR Pub 22 (1997),
“Information Technology Equipment – Radio Disturbance
Characteristics – Limits and Methods of Measurement”
Measurement methods in C63.4-2003 are still
required (§15.31)
Still subject to radiated emission limits in §15.109
above 1 GHz
Use of CISPR 22 Limits
Line Conducted Emissions
Line conducted emissions measurement must be
made using U.S. power voltages and frequencies.
Measurement methods in C63.4-2003 are still
required (§15.31)
§15.107(c) – Conducted Emissions
ITE – Limits are the same for both FCC and CISPR 22
§18.307 – Conducted Emissions
Consumer ISM equipment (microwave ovens) – Limits are
the same for both FCC and CISPR 11
ANSI C63.4 Standard referenced by
FCC
 2.948(b) – Normalized Site Attenuation for radiated
emissions test facility
 2.948(d) – Declaration of conformity
Tested by a recognized accredited testing laboratory
Accredited to ISO/IEC 17025 with scope covering FCC Part 15
and C63.4
Foreign testing laboratories subject to terms of a governmentto-government MRA
 15.31 – Measurement standards for intentional and
unintentional transmitters
C63.4-2003 excluding 4.1.5.2, 5.7, and 9
Measurement Procedures
47 CFR 15.31(a)(6) specifies use of ANSI C63.4
(2003) for most intentional and unintentional
radiators
Excluded sections:
Clause
Clause
Clause
Clause
4.1.5.2 – Rod antennas not permitted
5.7 – Artificial hand not permitted
9 – Absorbing clamp not permitted
14 –Click relaxation not permitted
C63.4-2009 Public Notice
FCC Recognizes C63.4-2009 and C63.102009
Public Notice, DA 09-2478, November 25,
2009
OET clarifies use of C63.4-2009 and C63.102009 for compliance testing of intentional and
unintentional radiators under Part 15
For more information
e-CFR – FCC Rules are available on line at:
http://ecfr.gpoaccess.gov/cgi/t/text/textidx?c=ecfr&tpl=%2Findex.tpl
Equipment Authorization Page
http://www.fcc.gov/oet/ea/
Knowledge Database (KDB)
https://apps.fcc.gov/oetcf/kdb/index.cfm
Recent KDB publications
Major guidance publications