TEM07-31
Draft Minutes of
7 meeting of the CISPR/A/SC77B JTF “TEM Waveguides”
th
___________________________________________________________________
Date:
08 July 2007
Place:
Honolulu, Hawaii, USA
___________________________________________________________________
List of Attendants
Members (CISPR/A)
H. Garbe
T. Harrington
A. Nothofer
W. Schaefer
M. Stecher
excused
excused
present
present
excused
Members (SC77B)
S. Ishigami
A. C. Marvin
D. E. C. Moehr
W. Radasky
B. Subbarao
P. Wilson
present
present
excused
present
excused
present
Guests (*awaiting membership)
G. D’Abreu*
S. Berger
L. Derousseau*
F. Galbraith*
K. Goshia*
F. Gronwald (representing Garbe)
present
present
excused
excused
present
present
Documents used in this meeting
TEM07-08Wilson Correlation Annex V2.doc
TEM07-09A_570e_INF-Definitions
TEM07-10Consistentuseofterms
TEM07-13_Membershiplist Feb 2007
TEM07-16_Draft Minutes JTF-TEM Erlangen 2007
TEM07-17_Action List
TEM07-19_Draft Agenda JTF-TEM Hawaii 2007
TEM07-20CIS_I_224e_CD
TEM07-21_ProbeCalibration_JP2
TEM07-22June 2006 ACEC report_revBG
TEM07-23Standard Climatic Conditions
TEM07-24Annex A and Annex F
TEM07-25Definitions
TEM07-26Field HomogeneityChangesto IEC61000-4-20
TEM07-27_61000-4-20-ed1.1-Jun07.doc
TEM07-28_61000-4-20-ed1.1-Jun07.pdf
TEM07-29Definition of Terms
TEM07-30Maintenance Workplan
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1 Opening of the meeting and welcome
The meeting starts 8th of July 2007, 11:00. The convenor (Marvin) opens the
meeting and welcomes the attendants.
2 Past meeting minutes & agenda
2.1 Erlangen minutes
TEM07-16_Draft Minutes JTF-TEM Erlangen 2007
TEM07-16a_Approved Minutes JTF-TEM Erlangen 2007
The minutes of the Erlangen meeting were amended and approved.
It was suggested to keep the same document number for updated documents,
therefore the amended minutes will be distributed as TEM07-16a
Action 2.1.1: Nothofer/Marvin to distribute amended minutes.
2.2 Agenda for this meeting
TEM07-19_Draft Agenda JTF-TEM Hawaii 2007
TEM07-19a_Approved Agenda JTF-TEM Hawaii 2007
The agenda for this meeting was amended and agreed.
Action 2.2.1: Nothofer/Marvin to distribute amended agenda.
3 Membership of JTF TEM-Waveguides
TEM07-13_Membershiplist Feb 2007
The membership list was handed around for amendments.
To new members (A. Aggarwal and B. Subbarao) have recently been appointed by
the Indian NC. Since this was only done shortly before this meeting we did not
expect active participation at this meeting. The convenor (Marvin) established
email contact with Subbarao, but has not yet received a reply from Aggarwal. Both
new members have been added to the mailing list and will be added to the
membership list.
Although Dunker has retired from participation in the JTF, he is still listed on the
IEC website. Nothofer will ask Delaballe to remind the German NC to remove his
entry.
Action 3.1: Nothofer to update and distribute membership list.
Action 3.2: Nothofer to ask Delaballe to remind the German NC to remove
Dunker’s entry from the IEC website for the JTF TEM.
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4 Items to report, and resulting actions if any
4.1 SC77B/CISPR/A Report
The convenors received an email by Delaballe asking for measurement
uncertainties to be discussed as soon as possible. This will be included under
Agenda Item 6.2.
The convenors will prepare a report to SC77B that will include the latest work plan.
Action 4.1.1: Nothofer/Marvin to prepare a report for SC77B
4.2 Review of actions from previous meetings
TEM07-17_Action List
Actions pending from 2nd meeting (Zurich):
Action 8.5.1: Wilson reports this is in progress
Actions pending from 3rd meeting (Chicago):
Action 5.5.5: can be removed since we don’t see a necessity to produce our own
suggestions anymore.
Action 7.1.1: will remain on the action list as an ongoing reminder
Actions from 4th meeting (York):
Action 5.2.2: completed
Actions from 5th meeting (Portland):
Action 4.2.1: completed
Action 5.1.1: completed
Action 5.3.1: completed
Action 5.4.1: editorial, in progress
Action 7.1: completed
Action 7.2: ongoing
Actions from 6th meeting (Erlangen):
Most actions from the Erlangen meeting were completed. Only the outstanding
actions are listed below.
Action 3.4: Moehr to clarify German participation – outstanding
Action 3.5: Radasky to establish membership for D’Abreu and Goshia –
outstanding
Action 3.6: Moehr to confirm status of Derousseau – outstanding
Action 3.7: Galbraith/Marvin/Nothofer to establish membership for Galbraith –
outstanding
Action 5.1.6: Marvin to report on WP2 item 2.2.1 – in progress
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5 Maintenance Cycle Report WP1
5.1 Terminology
TEM07-09A_570e_INF-Definitions
TEM07-10Consistentuseofterms
TEM07-25Definitions
TEM07-27_61000-4-20-ed1.1-Jun07
TEM07-29Definition of Terms
The documents listed were presented. TEM07-09 is a list of terms used in
CISPR/A documents, TEM07-10 and TEM07-25 were provided by Stecher and
Delaballe respectively. TEM07-29 is a compilation from TEM07-09, TEM07-25 and
definitions from the IEV. An updated version of TEM07-29 will be distributed as
TEM07-29a.
With regard to TEM07-09, Radasky noted that we should not use 61000-1-2 as a
reference for our document.
It was also noted that the term “verification” should be given preference over
“validation” since it is more general.
All members are reminded to read TEM07-10 and TEM07-29a since they should
form a guideline on the use of terms in 61000-4-20. The final update of 61000-4-20
will be produced at the next meeting.
TEM07-27 was presented where the use of the terms “test” and “measurement”
was amended according to the guideline given by TEM07-29.
Also in TEM07-27 references to CISPR16 are flagged. Schaefer will ensure they
are all updated to the new CISPR numbering system.
Action 5.1.1: Nothofer to update and distribute TEM07-29a
Action 5.1.2: All to read TEM07-10 and TEM07-29a and send comments to the
convenors.
Action 5.1.3: Schaefer to check the references to CISPR16 in 61000-4-20.
5.2 Field Homogeneity
TEM07-26Field HomogeneityChangesto IEC61000-4-20
Document TEM07-26 was presented.
Wilson agrees with the goal but still has concerns about this approach. It is based
on a wrong assumption since the TEM mode is calculable and the assumption of a
Gaussian distribution is incorrect.
Any member of the group who has concerns should send them to the convenors
who will distribute them to the group for discussion.
A final decision on this issue will be made at the next meeting!
Action 5.2.1: All who have concerns with regards to the field homogeneity
issue to send comments to the convenors for distribution for discussion.
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5.3 Field Probes
TEM07-21_ProbeCalibration_JP2
Document TEM07-21 was presented. This is a proposed Annex F on calibration
methods for field probes.
The following comments were made:
 Equation F2 is only valid for parallel plate waveguides, it is not valid for a
GTEM cell
 Radasky noted that 61000-4-3 will have this annex. Nothofer will ask Moehr
about the status of this issue.
 The second paragraph in Section F.3.2 (“Calibration laboratories shall
perform…”) gives the impression this test should be performed for all
frequencies. It should be made clear that this is only required for the worst
case and not for all frequencies.
 The test described in Section F.3.4 should just be a suggestion, not a
requirement; particularly since Section F.3.1 requires a VSWR of less than
1.3 for the TEM waveguide.
 Uncertainty calculations should be included.
All members are invited to submit comments to this document to the convenors.
These should be provided early enough to be discussed before the next meeting,
or this subject will have to be moved into Work Package 2.
Action 5.3.1: Nothofer to ask Moehr about the annex about field probes in 610004-3. What is the present status of this?
Action 5.3.2: All to study document TEM07-21 and send comments to the
convenors for distribution for discussion.
5.4 Large TEM Cells
TEM07-27_61000-4-20-ed1.1-Jun07
It was shown where the appropriate changes had been made in the latest version
of 61000-4-20 (TEM07-27).
5.5 Climatic Conditions
TEM07-23Standard Climatic Conditions
TEM07-27_61000-4-20-ed1.1-Jun07
Document TEM07-23, describing Standard Climatic Conditions was presented, and
it was shown where the appropriate changes had been made in the latest version
of 61000-4-20 (TEM07-27).
5.6 Workplan/Timetable
TEM07-30Maintenance Workplan
The updated work plan was presented.
Item 1.1.3 is outstanding. Nothofer will remind Harrington.
Item 1.1.5 is in progress under the lead of Ishigami. Nothofer will update the work
plan accordingly.
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Action 5.6.1: Nothofer to remind Harrington of work plan item 1.1.3.
Action 5.6.2: Nothofer to update work plan and distribute as TEM07-30a.
6 Maintenance Cycle Report WP2
6.1 Workplan/Timetable
TEM07-30Maintenance Workplan
Document TEM07-30 was presented. Nothing further was to report. This document
will be reviewed again at the next meeting.
6.2 Uncertainties
TEM07-20CIS_I_224e_CD
The convenors presented this document, they received from Delaballe with a
reminder of the necessity of an uncertainty budget. Sections F.4.3 and F.4.4 were
discussed. It was noted that the last sentence of Section F.4.4 is not very clear. We
believe it means that the EUT should be raised by at least 15% of the septum
height. Ishigami confirmed this.
All members are encouraged to submit proposals with regards to an uncertainty
budget. The convenors will distribute them for discussion. If proposals are received
in time, we may be able to include this discussion at the next meeting an move the
uncertainty issue from WP2 to WP1.
Radasky gave the convenors a proposal for a coordinated approach to
measurement uncertainties (MU) by the Swiss NC. The convenors will distribute
this document (77C_172.pdf) and the members are encouraged to study this.
Action 6.2.1: All to submit proposals regarding uncertainty budgets.
Action 6.2.1: Nothofer/Marvin to distribute document 77C_172.pdf
6.3 Proposal for a modified Annex A and New Annexes F and G
TEM07-24Annex A and Annex F
TEM07-08Wilson Correlation Annex V2.doc
TEM07-24 was presented. This is Annex A split into two parts, normative and
informative, as agreed at the Erlangen meeting (Agenda Item 6.3.1).
This will be implemented in the new edition of 61000-4-20
Document TEM07-08 was also presented again and a summary given by Wilson. It
was agreed that this is a generic document which may be better addressed in a
broader spectrum. We will forward this document to Beniamino Gorini, Convenor of
CISPR/A WG2
Action 6.3.1: Nothofer to implement TEM07-24 into the new edition of 61000-4-20
Action 6.3.2: Marvin to forward document TEM07-08 to Beniamino Gorini,
Convenor of CISPR/A WG2.
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7 Items not covered elsewhere
TEM07-22June 2006 ACEC report_revBG
Don Heirman asked for a report for the ACEC meeting. We updated the relevant
slides in the TEM07-22.
Action 7.1: Nothofer to give the updated file to Heirman.
Action 7.2: Nothofer/Marvin do distribute this file as TEM07-22a
8 Date and place of the 8th meeting of JTF TEM
The next meeting of the JTF-TEM will be a two day meeting in Nottingham, UK on
the 29th and 30th of November. This is earlier than our usual timing due to the
urgency to submit the MCR.
The 9th meeting in 2008 should be held between the URSI meeting and the 2008
IEEE EMC Symposium in Detroit. The exact day and venue still has to be
confirmed. No objections were made to a meeting on the Sunday before the Detroit
Symposium. This was in fact considered a preferred date to avoid clashes with
other meetings around the Symposium.
Members are also encouraged to suggest a venue for the 10th meeting of the JTFTEM.
Action 8.1: Nothofer to arrange the venue for the next meeting.
Action 8.2: All to suggest a venue for the 10th meeting of the JTF-TEM.
9 Close of the meeting
The convenor thanks the participants and closes the meeting at 16:00 on the 8th of
July 2007.
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