CISPR does NOT require the Ground choke..
Thank you
Charles Grasso
(Capn Hook)
--
From: Muriel Bittencourt de Liz[SMTP:mur...@inep.ufsc.br]
Sent: Monday, December 07, 1998 3:46 AM
To: Helge Knudsen
Cc: 'EMC-PSTC - IEEE'
Subject: Re: Doubt on LISN utilization
the matter.
Best regards
Helge Knudsen
Jyske EMC
Denmark
hknud...@jyske-emc.com
-Original Message-
From: Cortland Richmond [SMTP:72146@compuserve.com]
Sent: lordag, december 05, 1998 05:43
To: Gary McInturff; ieee pstc list
Subject:RE: Doubt on LISN utilization
Jyske EMC
Denmark
hknud...@jyske-emc.com
-Original Message-
From: Cortland Richmond [SMTP:72146@compuserve.com]
Sent: lørdag, december 05, 1998 05:43
To: Gary McInturff; ieee pstc list
Subject:RE: Doubt on LISN utilization
As I recall, when testing conducted
Bittencourt de Liz
Cc: emc-p...@majordomo.ieee.org
Subject: RE: Doubt on LISN utilization
I have a recollection that at one point VDE required the choke in the
ground
line of the LISN. Vaguely remembered it had to do with extremely long
build
grounds as in high rise buildings etc
-emc.com
-Original Message-
From: Cortland Richmond [SMTP:72146@compuserve.com]
Sent: lørdag, december 05, 1998 05:43
To: Gary McInturff; ieee pstc list
Subject:RE: Doubt on LISN utilization
As I recall, when testing conducted emissions to VDE 0871, it was required
As I recall, when testing conducted emissions to VDE 0871, it was required
to observe noise in the two powered lines with the switch both open and
closed, and use the higher result. Some power supplies would in fact give
different results if the ground was opened.
An aside: I used to work at
Subject:Re: Doubt on LISN utilization
It is possible to get noise induced on all cabling at the same time.
In
this case it will be also be present on the ground lead. To reduce
this
noise ground chokes are used. It is also extra attenuation for
common
mode
From: rehel...@mmm.com
Subject: Re: Doubt on LISN utilization
Date: Fri, 4 Dec 1998 11:25:50 -0600
To: Muriel Bittencourt de Liz mur...@inep.ufsc.br
Cc: emc-p...@majordomo.ieee.org
It is possible to get noise induced on all cabling at the same time
)
Subject: Doubt on LISN utilization
Hello All,
I have a LISN from EMCO and it has a Ground Choke. What's the goal of
this Ground Choke? Is it really needed in the conducted measurements?
Could somebody make this clear to me?
Thanks in advance
Muriel
Hello All,
I have a LISN from EMCO and it has a Ground Choke. What's the goal of
this Ground Choke? Is it really needed in the conducted measurements?
Could somebody make this clear to me?
Thanks in advance
Muriel
--
==
Muriel Bittencourt de
Yes, you're doing it right.
With the transformer between the AC mains and the LISN it is essentially
out of the loop. The spectrum analyzer looks through the LISN at the
EUT's conducted emissions.
You see, there is quite a filter between the LISN and the AC mains, so
adding the transformer
-- Forwarded Message --
From: Chris Dupres, 100014,3703
TO: Muriel Bittencourt de Liz, INTERNET:mur...@inep.ufsc.br
DATE: 21/10/98 19:12
RE: Copy of: Doubt on LISN utilization
Hi Muriel.
You asked:
I'm doing some tests of conducted emission using a LISN. My
:
-- Forwarded Message --
From: Chris Dupres, 100014,3703
TO: Muriel Bittencourt de Liz, INTERNET:mur...@inep.ufsc.br
DATE: 21/10/98 19:12
RE: Copy of: Doubt on LISN utilization
Hi Muriel.
You asked:
I'm doing some tests of conducted emission using a LISN. My commercial
in
luxurious quiet! :-)
Don't forget to be careful of power lead placement and EUT grounding from
test to test.
Regards,
Ed
From: Muriel Bittencourt de Liz mur...@inep.ufsc.br
Subject: Doubt on LISN utilization
Date: Wed, 21 Oct 1998 15:00:01 -0200
To: Lista
Hello,
I'm doing some tests of conducted emission using a LISN. My commercial
voltage level is 220 V, 60Hz. But the product i'm testing is 110 V. So,
i'm using a transformer before the LISN this way:
Mains = Transformer(220/110) = LISN = EUT ( Equipment Under Test )
My questions are:
# am i
! :-)
Don't forget to be careful of power lead placement and EUT grounding from test
to test.
Regards,
Ed
From: Muriel Bittencourt de Liz mur...@inep.ufsc.br
Subject: Doubt on LISN utilization
Date: Wed, 21 Oct 1998 15:00:01 -0200
To: Lista de EMC da IEEE emc-p
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