All,
As always - thanks for the feedback and discussion. Learn a lot from this forum
Best regards,
Mac
From: Ken Javor <ken.ja...@emccompliance.com>
To: EMC-PSTC@LISTSERV.IEEE.ORG
Sent: Wednesday, September 13, 2017 8:57 AM
Subject: Re: [PSES] LISN Calibration Measurement Uncertainty
I assumed that since uncertainty was in question, that this was some sort of
CISPR 22 or similar quest, so 150 kHz and up, and not CISPR 25. If it were
CISPR 25, then it is a low impedance at 150 kHz as Tom points out, but using
the technique I suggested, excellent accuracy may still be had.
Ken Javor
Phone: (256) 650-5261
> From: "T.Sato" <vef00...@nifty.com>
> Reply-To: "T.Sato" <vef00...@nifty.com>
> Date: Wed, 13 Sep 2017 22:09:36 +0900
> To: <EMC-PSTC@LISTSERV.IEEE.ORG>
> Subject: Re: [PSES] LISN Calibration Measurement Uncertainty
>
> On Tue, 12 Sep 2017 10:13:26 -0500,
> Ken Javor <ken.ja...@emccompliance.com> wrote:
>
>> There shouldn't be a lower impedance issue, because from 150 kHz up the LISN
>> is very close to 50 ohms. And once the LISN coil impedance is well above 50
>> ohms, the measured LISN impedance should be 50 ohms in parallel with the
>> bleeder resistor, which is essentially 50 ohms. The only affect is if there
> ...
>
> I think:
>
> o 50 ohms / 50 uH + 5 ohms LISN has impedance spec down to 9 kHz,
> and its EUT port impedance is 5 ohms + j2.8 ohms at 9 kHz.
>
> o Automotive 5 uH LISN has impedance spec down to 150 kHz, and its
> EUT port impedance is j4.7 ohms at 150 kHz.
>
> Regards,
> Tom
>
> --
> Tomonori Sato <vef00...@nifty.com>
> URL: http://t-sato.in.coocan.jp
>
>
>>> From: "T.Sato" <vef00...@nifty.com>
>>> Reply-To: "T.Sato" <vef00...@nifty.com>
>>> Date: Tue, 12 Sep 2017 21:58:54 +0900
>>> To: <EMC-PSTC@LISTSERV.IEEE.ORG>
>>> Subject: Re: [PSES] LISN Calibration Measurement Uncertainty
>>>
>>> On Mon, 11 Sep 2017 16:32:09 +0000,
>>> Mac Elliott <00000a115b29e815-dmarc-requ...@ieee.org> wrote:
>>>
>>>> We are interested in doing some in-house LISN calibrations (impedance
>>>> verification only using network analyzer) and need to develop an
>>>> uncertainty
>>>> budget.
>>>> Does anyone happen to have a budget you could share with us? We will go
>>>> through the exercise of calculating ourself but if there is one out there
>>>> would appreciate it if you could share.
>>>
>>> I think the major contributions would be:
>>>
>>> o network analyzer (VNA?);
>>> o calibration jig which will be required to connect coax to the LISN
>>> terminals.
>>>
>>> Other possible contributions such as resolution and repeatability may also
>>> need to be considered, even if they are relatively minor.
>>>
>>>
>>> For lower impedance, network analyzers may have relatively large impedance
>>> measurement uncertainty:
>>>
>>>
>>> http://www.keysight.com/main/editorial.jspx?cc=ES&lc=spa&ckey=1000002148:eps
>>> g:
>>> faq&nid=-11143.0.00&id=1000002148:epsg:faq
>>>
>>> Regards,
>>> Tom
>>>
>>> --
>>> Tomonori Sato <vef00...@nifty.com>
>>> URL: http://t-sato.in.coocan.jp
>>>
>>> -
>>> ----------------------------------------------------------------
>>> This message is from the IEEE Product Safety Engineering Society emc-pstc
>>> discussion list. To post a message to the list, send your e-mail to
>>> <emc-p...@ieee.org>
>>>
>>> All emc-pstc postings are archived and searchable on the web at:
>>> http://www.ieee-pses.org/emc-pstc.html
>>>
>>> Attachments are not permitted but the IEEE PSES Online Communities site at
>>> http://product-compliance.oc.ieee.org/ can be used for graphics (in
>>> well-used
>>> formats), large files, etc.
>>>
>>> Website: http://www.ieee-pses.org/
>>> Instructions: http://www.ieee-pses.org/list.html (including how to
>>> unsubscribe)
>>> List rules: http://www.ieee-pses.org/listrules.html
>>>
>>> For help, send mail to the list administrators:
>>> Scott Douglas <sdoug...@ieee.org>
>>> Mike Cantwell <mcantw...@ieee.org>
>>>
>>> For policy questions, send mail to:
>>> Jim Bacher: <j.bac...@ieee.org>
>>> David Heald: <dhe...@gmail.com>
>>
>> -
>> ----------------------------------------------------------------
>> This message is from the IEEE Product Safety Engineering Society emc-pstc
>> discussion list. To post a message to the list, send your e-mail to
>> <emc-p...@ieee.org>
>>
>> All emc-pstc postings are archived and searchable on the web at:
>> http://www.ieee-pses.org/emc-pstc.html
>>
>> Attachments are not permitted but the IEEE PSES Online Communities site at
>> http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
>> formats), large files, etc.
>>
>> Website: http://www.ieee-pses.org/
>> Instructions: http://www.ieee-pses.org/list.html (including how to
>> unsubscribe)
>> List rules: http://www.ieee-pses.org/listrules.html
>>
>> For help, send mail to the list administrators:
>> Scott Douglas <sdoug...@ieee.org>
>> Mike Cantwell <mcantw...@ieee.org>
>>
>> For policy questions, send mail to:
>> Jim Bacher: <j.bac...@ieee.org>
>> David Heald: <dhe...@gmail.com>
>
> -
> ----------------------------------------------------------------
> This message is from the IEEE Product Safety Engineering Society emc-pstc
> discussion list. To post a message to the list, send your e-mail to
> <emc-p...@ieee.org>
>
> All emc-pstc postings are archived and searchable on the web at:
> http://www.ieee-pses.org/emc-pstc.html
>
> Attachments are not permitted but the IEEE PSES Online Communities site at
> http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
> formats), large files, etc.
>
> Website: http://www.ieee-pses.org/
> Instructions: http://www.ieee-pses.org/list.html (including how to
> unsubscribe)
> List rules: http://www.ieee-pses.org/listrules.html
>
> For help, send mail to the list administrators:
> Scott Douglas <sdoug...@ieee.org>
> Mike Cantwell <mcantw...@ieee.org>
>
> For policy questions, send mail to:
> Jim Bacher: <j.bac...@ieee.org>
> David Heald: <dhe...@gmail.com>
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
<emc-p...@ieee.org>
All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <sdoug...@ieee.org>
Mike Cantwell <mcantw...@ieee.org>
For policy questions, send mail to:
Jim Bacher: <j.bac...@ieee.org>
David Heald: <dhe...@gmail.com>
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
<emc-p...@ieee.org>
All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <sdoug...@ieee.org>
Mike Cantwell <mcantw...@ieee.org>
For policy questions, send mail to:
Jim Bacher: <j.bac...@ieee.org>
David Heald: <dhe...@gmail.com>
