Re: EN 55024 Annex A.1

2001-05-24 Thread David Gelfand
Joe,

The test was done by Nemko Canada using the clamp method.  The clamp was 
calibrated a few hours before my test.  The equipment was 10 cm over a ground 
plane, and they were monitoring the test voltage with a clamp to be sure not to 
overtest.  Is the coupling network a better bet than the clamp?

Our card does not have a ground plane and I suspect that this is part of the 
problem.  Also the components for setting impedances could be closer to the 
chip.  But before we scramble to fix the board I'd like to be sure it is 
possible to do with the AMD component.  Their AEs are trying to get me this 
information, if you could put me in touch with your contact who passed with 
this chip that could help too.  Thanks again for your input.

Best regards,

David.



Re: EN 55024 Annex A.1

2001-05-24 Thread JPR3
In a message dated 5/24/01, David Gelfand writes:

 When we inject as per IEC 61000-4-6, the 1 kHz tone is demodulated and is 
 VERY loud in the telephone earpiece!  This happens no matter which i/o 
 cable we inject, even the power cord.  


Hi David:

While it is not surprising for an unprotected SLIC port to have trouble with 
the 61000-4-6 test, I think it is abnormal for the problem to be equally 
pronounced when cables other than tip/ring are being tested.  There may be a 
problem with your ground connections and/or test setup.  Are you using CDNs 
or the clamp method?  Do you have a good ground plane as specified in the 
standard?

I recently purchased most of the equipment required to perform this test, and 
I have been experimenting in the lab to characterize various DAAs and SLICs.  
I have found that the results I get are somewhat dependent on the specifics 
of the test setup.  The first thing I would suggest is that you review your 
test setup to be sure it fully complies with 61000-4-6.

I have not tested the AM79R70, but I did run some quick tests on a circuit 
that used the Intersil HC55183, which is also a ringing SLIC.  In that test, 
the SLIC was pretty quiet at carrier frequencies above 1 MHz, but there was 
some 1 KHz demodulation at lower frequencies.  I have not had time to 
experiment with possible fixes.

I do know of someone who is using the AM79R70 and claims that they have 
passed this test.  Unfortunately, I do not know the details.

By the way, don't feel too bad if you are having trouble with this test.  It 
is a brutal test, and most people I know who have tested their existing 
designs have failed.  Since passing this test becomes mandatory on July 1 for 
CE marking, I expect that there will be a lot of activity as the July 1 date 
approaches.



Joe Randolph
Telecom Design Consultant
Randolph Telecom, Inc.
781-721-2848
http://www.randolph-telecom.com


RTTE or only EMC / LVD ?

2001-05-24 Thread amund

Hi Group,

A satellite (range 10-14GHz) consists of two parts, the modulation unit (IDU= 
in door unit) and the RF unit (ODU= out door unit). The two units are connected 
together with a coaxial cable which can be up to 100m long and it carry the IF 
signal of a couple hundreds MHz.
The ODU consists of an up-converter, amplifier, antenna and so on, while the 
IDU is the modulator/demodulator, power unit and generating the IF 
signal.

We assume (for sure) that the complete system is covered by RTTE. But the IDU 
will also be available as a stand-alone unit on the marked.

No teleterminal connections are available from the IDU, only RS-232 input and 
IF output on coax cable to the ODU.

Our question is:
For the IDU, will RTTE apply or will only EMC (and LVD) apply, as a stand-alone 
unit?

We feel this system looks like a broadband TV-cable system. You have a RF 
transmitter, but it only transmits via cable. No harm on the RF spectrum.


Best regards
Amund Westin, Oslo/Norway

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Double Crimp - History Request

2001-05-24 Thread Kazimier_Gawrzyjal

Folks,

A while back I recall some interesting discussion revolving around the
double crimp requirements of connectors onto conductors.  The discussion
held many interesting views in terms of what double crimp means and what the
origins of the requirement were but alas, I can't seem to locate the threads
on the RCIC archives.  

If anyone has a copy of the discussion threads, could someone please forward
it on to me?  

My opinion and not that of my employer.

Thanks in Advance,
Kaz Gawrzyjal
kazimier_gawrzy...@dell.com

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RE: Cable Drawing Standards

2001-05-24 Thread Price, Ed

Dick:

Do you have this document available as a file? Please reply to the list so
that others may contact you off-list to request a copy.

Regards,

Ed


Ed Price
ed.pr...@cubic.com
Electromagnetic Compatibility Lab
Cubic Defense Systems
San Diego, CA  USA
858-505-2780  (Voice)
858-505-1583  (Fax)
Military  Avionics EMC Services Is Our Specialty
Shake-Bake-Shock - Metrology - Reliability Analysis


-Original Message-
From: Dick Grobner [mailto:dick.grob...@medgraph.com]
Sent: Thursday, May 24, 2001 7:50 AM
To: 'Veit, Andy'
Cc: IEEE EMC-PSTC E-Mail Forum (E-mail)
Subject: RE: Cable Drawing Standards



Good Day Andy
About three years ago I had the same dilemma. I searched and 
found no such
standard that was directed toward just this subject. There are 
many articles
written and published in magazines, technical books, etc. dealing with
proper cable construction. I then decided that I would compile 
all of this
info into an internal engineering standard titled - Shielded Cable
Assemblies. This standard deals with molded signal cables used to
externally interface our medical devices. These cables are sourced
externally. So far, it seems to be doing the job! I reference this
engineering standard on our cable specifications and a copy 
goes to all of
our suppliers of this commodity. 
If you wish, I could send a copy of the document as a 
reference. Let me know
if you would like a copy!
I would be curious from the rest of the forum if such a 
standard does exist.
I guess we will wait and see!

-Original Message-
From: Veit, Andy [mailto:andy.v...@mts.com]
Sent: Thursday, May 24, 2001 7:35 AM
To: emc-p...@majordomo.ieee.org
Subject: Cable Drawing Standards



All-
I have an unusual request for information.  I was recently 
asked if there
are standards for cable construction, and standards that describe how a
desired construction is to be documented - i.e. preferred ways 
to terminate
shields on a connector backshell and how to show this type of 
information as
clearly and unambiguously as possible on cable drawings. 

I am guessing that many of you have probably come across this 
type of thing
before, either in your current work or in a past life.  Are there IEEE,
ANSI, MIL or other standards that are commonly used as guides 
when creating
cable assembly drawings/documentation?  I have also been told that
workmanship standards exist as well, but I have not been 
able to locate
any yet.

Thank you-
-Andy

Andrew Veit
MTS Systems

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RE: EN 61000-3-2 and -3 equipment

2001-05-24 Thread Colgan, Chris

Agilent are supposed to be writing a software upgrade to cover A14 of
EN61000-3-2.  There is no sign of it yet though.

Regards

Chris Colgan
Compliance Engineer
TAG McLaren Audio Ltd
The Summit, Latham Road
Huntingdon, Cambs, PE29 6ZU
*Tel: +44 (0)1480 415 627
*Fax: +44 (0)1480 52159
* Mailto:chris.col...@tagmclarenaudio.com
* http://www.tagmclarenaudio.com



 -Original Message-
 From: Lothar Schmidt [SMTP:lothar.schm...@cetecomusa.com]
 Sent: 23 May 2001 19:10
 To:   'emc-p...@ieee.org'
 Subject:  EN 61000-3-2 and -3 equipment
 
 Does anybody know which equipment is available here in the US to do this
 tests after Agilent decided not to continue their product? Which are the
 estimated costs for it?
  
 Each information is welcome.
 
 Best Regards 
 
 Lothar Schmidt 
 Technical Manager EMC/Bluetooth, 
 BQB, Competent Body 
 Cetecom Inc. 
 411 Dixon Landing Road 
 Milpitas, CA 95035 
 Phone: +1 (408) 586 6214 
 Fax: +1 (408) 586 6299 
 
  


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RE: Cable Drawing Standards

2001-05-24 Thread Dick Grobner

Good Day Andy
About three years ago I had the same dilemma. I searched and found no such
standard that was directed toward just this subject. There are many articles
written and published in magazines, technical books, etc. dealing with
proper cable construction. I then decided that I would compile all of this
info into an internal engineering standard titled - Shielded Cable
Assemblies. This standard deals with molded signal cables used to
externally interface our medical devices. These cables are sourced
externally. So far, it seems to be doing the job! I reference this
engineering standard on our cable specifications and a copy goes to all of
our suppliers of this commodity. 
If you wish, I could send a copy of the document as a reference. Let me know
if you would like a copy!
I would be curious from the rest of the forum if such a standard does exist.
I guess we will wait and see!

-Original Message-
From: Veit, Andy [mailto:andy.v...@mts.com]
Sent: Thursday, May 24, 2001 7:35 AM
To: emc-p...@majordomo.ieee.org
Subject: Cable Drawing Standards



All-
I have an unusual request for information.  I was recently asked if there
are standards for cable construction, and standards that describe how a
desired construction is to be documented - i.e. preferred ways to terminate
shields on a connector backshell and how to show this type of information as
clearly and unambiguously as possible on cable drawings. 

I am guessing that many of you have probably come across this type of thing
before, either in your current work or in a past life.  Are there IEEE,
ANSI, MIL or other standards that are commonly used as guides when creating
cable assembly drawings/documentation?  I have also been told that
workmanship standards exist as well, but I have not been able to locate
any yet.

Thank you-
-Andy

Andrew Veit
MTS Systems

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RE: Cable Drawing Standards

2001-05-24 Thread Mark Schmidt

There are IPC standards here is one example, I am sure there are more;

IPC-3710 - Acceptability of Wiring/Cable Harnesses, Electronic Cable
Assemblies, Cord Sets, and Wires

I am pretty sure these documents will not accommodate EMI design. That
will be left to your imagination and expertise. These IPC documents help
establish commonality of  procedure throughout your company to the ever
developing industry standards. It is basically a way of doing something
consistently in manufacturing. I did not search the whole site  but here
is the address http://www.ipc.org/. They may have what your looking for.

Check it out.

Mark




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Re: EN 61000-3-2 and -3 equipment

2001-05-24 Thread amund

Lothar,

Some years ago I used the harmonic analyzer and flicker equipment from the 
German company Spitzenberger + Spies. It worked very good. 
Check http://www.spitzenberger.de/
I guess they have an US dealer.

Good luck!

Best regards
Amund Westin, Oslo/Norway



On Wed, 23 May 2001 21:41:25 +0100 John Woodgate j...@jmwa.demon.co.uk wrote:

5EFB06767D7DD211828C0008C74CE95B414981@CALVIN, Lothar Schmidt
lothar.schm...@cetecomusa.com inimitably wrote:
Does anybody know which equipment is available here in the US to do this
tests after Agilent decided not to continue their product? Which are the
estimated costs for it?
 
Enquire again from Agilent. I believe they had second thoughts.
-- 
Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839
Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Why not call a vertically-
applied manulo-pedally-operated quasi-planar chernozem-penetrating and 
excavating implement a SPADE?

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Cable Drawing Standards

2001-05-24 Thread Veit, Andy

All-
I have an unusual request for information.  I was recently asked if there
are standards for cable construction, and standards that describe how a
desired construction is to be documented - i.e. preferred ways to terminate
shields on a connector backshell and how to show this type of information as
clearly and unambiguously as possible on cable drawings. 

I am guessing that many of you have probably come across this type of thing
before, either in your current work or in a past life.  Are there IEEE,
ANSI, MIL or other standards that are commonly used as guides when creating
cable assembly drawings/documentation?  I have also been told that
workmanship standards exist as well, but I have not been able to locate
any yet.

Thank you-
-Andy

Andrew Veit
MTS Systems

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RE: CISPR Compliant Spectrum analyzer/receiver

2001-05-24 Thread UMBDENSTOCK

The EMC-30 is spec'd for 75% relative humidity -- and they mean it.  If you
operate the instrument in RH above this, you will loose control, i.e., seems
to be some shorting between front panel control functions.

 --
 From: Ken Javor[SMTP:ken.ja...@emccompliance.com]
 Reply To: Ken Javor
 Sent: Wednesday, May 23, 2001 2:59 PM
 To:   Wolak, Marvin; EMC-PSTC Newsgroup (E-mail)
 Subject:  Re: CISPR Compliant Spectrum analyzer/receiver
 
 
 I would look at the Electrometrics EMC-30 and the Carnel NM 17/27.  I
 think
 these have built-in quasi-peak detection, but I'm not sure.  Both of these
 machines have tunable front ends (built-in preselection).
 
 --
 From: Wolak, Marvin marvin.wo...@marconi.com
 To: EMC-PSTC Newsgroup (E-mail) emc-p...@ieee.org
 Subject: CISPR Compliant Spectrum analyzer/receiver
 Date: Wed, May 23, 2001, 11:11 AM
 
 
 
  I need to rent a CISPR 16 compliant spectrum analyzer/receiver over the
  frequency range 0.15 - 30 MHz.
 
  Any suggestions?
 
  I'm familiar with the good ol' HP 8566 / 8568 (Do I need the preselector
  with them for CISPR 16 compliance?), and the RS ESI.
 
  What else may be out there available in the rental shops?
 
  Thanks,
 
  Marvin Wolak
  Marconi Networks
 
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Re: CISPR Compliant Spectrum analyzer/receiver

2001-05-24 Thread Lfresearch

You could always use the worlds best kept secret,  a Schaffner EMI receiver...

There are 2, both fully CISPR compliant.

Derek Walton.

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RE: MIL-STD-185

2001-05-24 Thread Price, Ed

The DoD standards base is at:

http://astimage.daps.dla.mil/quicksearch/

In this case, Mil-Std-185, a spec on copper alloys, has been cancelled. It
may have been superseded by a Federal Standard 185A, also about copper
alloys, and also cancelled. There is now an SAE-AMS-STD-185, on copper
alloys. You have to buy this commercial document. (I sent Andy the SAE
address.)

Regards,

Ed


Ed Price
ed.pr...@cubic.com
Electromagnetic Compatibility Lab
Cubic Defense Systems
San Diego, CA  USA
858-505-2780  (Voice)
858-505-1583  (Fax)
Military  Avionics EMC Services Is Our Specialty
Shake-Bake-Shock - Metrology - Reliability Analysis


-Original Message-
From: Pettit, Ghery [mailto:ghery.pet...@intel.com]
Sent: Wednesday, May 23, 2001 4:38 PM
To: emc-p...@majordomo.ieee.org
Cc: 'a.podgor...@ieee.org'
Subject: MIL-STD-185



All,

Andy Podgorski (a.podgor...@ieee.org) is looking for a copy of 
MIL-STD-185.
He isn't a participant on this board (but I suggested to him 
that he ought
to be), so I'm posting this for him.   I haven't heard of this 
document and,
courtesy of a recent hard drive crash, I don't have the URL of 
a source I
used to have for downloading mil specs.  If anyone knows where 
to find this
(and other) mil specs, would you please let Andy know directly (and I
wouldn't mind a refresher on the URL, either).

Thanks for your help.

Ghery Pettit
Intel


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MIL-STD-185

2001-05-24 Thread Pettit, Ghery

All,

Andy Podgorski (a.podgor...@ieee.org) is looking for a copy of MIL-STD-185.
He isn't a participant on this board (but I suggested to him that he ought
to be), so I'm posting this for him.   I haven't heard of this document and,
courtesy of a recent hard drive crash, I don't have the URL of a source I
used to have for downloading mil specs.  If anyone knows where to find this
(and other) mil specs, would you please let Andy know directly (and I
wouldn't mind a refresher on the URL, either).

Thanks for your help.

Ghery Pettit
Intel



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Re: EN 50021 question

2001-05-24 Thread John Woodgate

a9713061f01ad411b0f700d0b746ca6801550...@vacho6misge.cho.ge.com,
Biggs, Daniel (IndSys, GEFanuc, NA) daniel.bi...@gefanuc.com
inimitably wrote:
In 1999, pR EN 50021 went to EN 50021.  My question is...why have the
spacings for Pollution degree 2 been changed between the preliminary version
to the adopted version of 50021.  The spacing requirements seem to have
increased.

A prEN is an unapproved draft. The subject was still under active
discussion in IEC TC28 and IEC TC64 at the time, and the thinking
changed between the prEN and the EN.
-- 
Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839
Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Why not call a vertically-
applied manulo-pedally-operated quasi-planar chernozem-penetrating and 
excavating implement a SPADE?

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Re: EN 61000-3-2 and -3 equipment

2001-05-24 Thread John Woodgate

5EFB06767D7DD211828C0008C74CE95B414981@CALVIN, Lothar Schmidt
lothar.schm...@cetecomusa.com inimitably wrote:
Does anybody know which equipment is available here in the US to do this
tests after Agilent decided not to continue their product? Which are the
estimated costs for it?
 
Enquire again from Agilent. I believe they had second thoughts.
-- 
Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839
Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Why not call a vertically-
applied manulo-pedally-operated quasi-planar chernozem-penetrating and 
excavating implement a SPADE?

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