Re: [JunkMail] 1500 ohms 100 pF gun?

2006-06-21 Thread emc-p...@ieee.org
Hi Cortland and the group (from vacation in Orange County, CA),

I remember using such a network in a home built ESD simulator many 
years ago at Bell Labs, a human finger model. Electronic telephones 
that had no problem with such a simulator did not come back for 
warrantee repairs. The IEC network, which models a piece of metal in 
the hand, is much more severe and is often an overtest of small 
plastic items like telephones and PDAs.

I have copied Michael King on this. He is an early pioneer in ESD and 
perhaps can shed some light on this in addition to what I have said 
above. Much of what we now do in ESD was laid out by Michael decades 
ago and is still valid.

Doug

Cortland Richmond wrote:
 Was looking for one for some military testing at work.  I seem to recall
 that the Andy Hish ESD-255 used this network in one of its probes. Am I
 wrong?
 
 
 Cortland Richmond
 KA5S
 
 -
 
 This message is from the IEEE Product Safety Engineering Society
 emc-pstc discussion list.Website:  http://www.ieee-pses.org/
 
 To post a message to the list, send your e-mail to emc-p...@ieee.org
 
 Instructions:  http://listserv.ieee.org/request/user-guide.html
 
 List rules: http://www.ieee-pses.org/listrules.html
 
 For help, send mail to the list administrators:
 
  Scott Douglas   emcp...@ptcnh.net
  Mike Cantwell   mcantw...@ieee.org
 
 For policy questions, send mail to:
 
  Jim Bacher: j.bac...@ieee.org
  David Heald:emc-p...@daveheald.com
 
 All emc-pstc postings are archived and searchable on the web at:
 
 http://www.ieeecommunities.org/emc-pstc
 
 

-- 

 ___  _Doug Smith
  \  / )   P.O. Box 1457
   =   Los Gatos, CA 95031-1457
_ / \ / \ _TEL/FAX: 408-356-4186/358-3799
  /  /\  \ ] /  /\  \  Mobile:  408-858-4528
|  q-( )  |  o  | Email:   d...@dsmith.org
  \ _ /]\ _ /  Web: http://www.dsmith.org


-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc



RE: Requirements for evaluations kits

2006-06-21 Thread emc-p...@ieee.org
Mr. Jensen,

FCC Cellular and PCM are regulated under 47CFR Part 22  24, and the Bluetooth
must meet 47CFR Part 15 requirements, and all are subject to certification. 
The transmitter circuit board can be Certified for evaluation or
demonstration purposes so long as it is not intended to be used as a module
to be evaluated within a host device such as a laptop computer.  Marketing of
the device shall not be to the general public. Certification requires
appropriate grant conditions and user instructions to limit marketing and use
of the device.  The user manual must also agree with these conditions. 

Transmitter boards used for evaluation in host devices must be modular
approved and comply with the modular approval requirements including
shielding. 

Bill Stumpf
D.L.S. Electronics
166 South Carter Street
Genoa City WI 53128
bstu...@dlsemc.com
phone: 262.279.0210





From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Ferry, Allen
Sent: Wednesday, June 21, 2006 4:21 AM
To: Kim Boll Jensen; EMC PSTC
Subject: RE: Requirements for evaluations kits

Hi,

There is a guidance document on radio kits from the RTTECA. 

http://www.rtteca.com/TGN02.doc

Regards

Allen


From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Kim Boll Jensen
Sent: 20 June 2006 15:32
To: EMC PSTC
Subject: Requirements for evaluations kits

Hi all

I have a special evaluation kit consisting of both GSM, Bluetooth and several
HW com lines. It will be sold world wide in rather big quantities, and
therefore I will like to know under which rules it can be sold arround the
world.

Any answer just concerning one or mor countries are very welcome.

Best regards.

Kim Boll Jensen
Bolls Rådgivning
Ved Gadekæret 11F
DK-3660 Stenløse

Tlf.:  48 18 35 66
Fax:   48 18 35 30
Mobil: 22 99 69 91

E-mail: k...@bolls.dk
web: www.bolls.dk

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc



Re: CISPR22 Edition 5 SLCE and Ethernet

2006-06-21 Thread emc-p...@ieee.org
In message 
231db4b2f2634a4c94d87d89a4fa81d201542...@ny13ex011.global.ds.honeywell.c
om, dated Wed, 21 Jun 2006, Sterner, David [SFS] 
david.ster...@honeywell.com writes

If a pair of lines connects only two ports, each of the two ports is 
100 ohms impedance, and the cable is uniform, please explain how the 
Ethernet line can have an impedance imbalance between the two ports?

I'm not sure what you mean by 'an impedance imbalance between the two 
ports'. We were not discussing impedance mismatch but mode conversion 
from differential to common (leading potentially to emissions from the 
cable) or vice versa (leading to a lack of immunity).

The functioning of balanced circuits in not radiating the signal and
rejecting common-mode disturbances depends on the impedances at each end 
of the cable, from each conductor to a common reference point, being 
closely equal. Any voltage between the common reference points is then 
the  input to a balanced bridge, and none of that voltage appears 
between the signal conductors. And vice versa, of course.

While transformers CAN be made with excellent symmetry and very closely 
equal impedances to the common point, they are not always so designed, 
and it would be appropriate for the system standard to specify the 
permitted unbalance, in one of the many ways that can be done. I think 
this is what the original enquirer is asking about.
-- 
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc



RE: CISPR22 Edition 5 SLCE and Ethernet

2006-06-21 Thread emc-p...@ieee.org
In a message 21-Jun-06 Mr. Woodgate stated I don't understand why you
have sent this information. I've no doubt 
it's all true, but you haven't quoted any of the message you are
responding to, and you haven't commented on the permitted unbalance of
the port impedances, which is one subject under discussion.

If a pair of lines connects only two ports, each of the two ports is 100
ohms impedance, and the cable is uniform, please explain how the
Ethernet line can have an impedance imbalance between the two ports?
Given the requirements of IEE 802.3, a port imbalance is inconsistant
with transmission line theory.

My answer is for the Ethernet communications lines only (tx, rx);
termination imbalance is quite possible in the case of 'power over
Ethernet', where DC travels over the CAT-n wires not used for
communications.

.
Honeywell
David W. Sterner
Quality Assurance Engineering
Security  Custom Electronics
165 Eileen Way
P.O. Box 9035
Syosset, NY   11791
Phone: (516) 921-6704 x6970
Fax # (516) 364-6953
david.ster...@honeywell.com
http://www.honeywell.com 
david.ster...@ieee.org
http://www.IEEE.LI  
Electromagnetic Compatibility
IEEE 05888136

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc



Re: CISPR22 Edition 5 SLCE and Ethernet

2006-06-21 Thread emc-p...@ieee.org
In message 
231db4b2f2634a4c94d87d89a4fa81d201542...@ny13ex011.global.ds.honeywell.c
om, dated Wed, 21 Jun 2006, Sterner, David [SFS] 
david.ster...@honeywell.com writes
Per ANSI/IEEE 8032.3x Ethernet Cat 5, 6, and 7 cables have only two 
ports, additional ports are forbidden.  Both ports are transformer 
isolated for a 100-ohm impedance termination.  Communication to other 
network locations is always through an active device (e.g. hub, switch, 
router).

I don't understand why you have sent this information. I've no doubt 
it's all true, but you haven't quoted any of the message you are 
responding to, and you haven't commented on the permitted unbalance of 
the port impedances, which is one subject under discussion.
-- 
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc



RE: CISPR22 Edition 5 SLCE and Ethernet

2006-06-21 Thread emc-p...@ieee.org
Per ANSI/IEEE 8032.3x Ethernet Cat 5, 6, and 7 cables have only two ports,
additional ports are forbidden.  Both ports are transformer isolated for a
100-ohm impedance termination.  Communication to other network locations is
always through an active device (e.g. hub, switch, router).  

The only variation is full-duplex communication where 4 lines are active and
connexion is to a switch (hubs do not support full duplex).  In full-duplex
both ports have two transformer terminations, one for transmit and the other
for receive.

Ethernet adapter cards (NICS) support full duplex, but negotiate to half
duplex if connected to a hub.

.
Honeywell
David W. Sterner
Quality Assurance Engineering
Security  Custom Electronics
165 Eileen Way
P.O. Box 9035
Syosset, NY   11791
Phone: (516) 921-6704 x6970
Fax # (516) 364-6953
david.ster...@honeywell.com
http://www.honeywell.com 
david.ster...@ieee.org
http://www.IEEE.LI  
Electromagnetic Compatibility
IEEE 05888136

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc



1500 ohms 100 pF gun?

2006-06-21 Thread emc-p...@ieee.org
Was looking for one for some military testing at work.  I seem to recall
that the Andy Hish ESD-255 used this network in one of its probes. Am I
wrong?


Cortland Richmond
KA5S

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc



IEEE PSES Newsletter and Symposium

2006-06-21 Thread emc-p...@ieee.org
The latest issue of the IEEE PSES Product Safety Newsletter is now 
available on line at :

http://www.ieee-pses.org/newsletters.html

Note: You must be a member of the IEEE Product Safety Society to 
access the current versions of the newsletters.  

Abstracts for papers being presented at the upcoming (October) IEEE
Product 
Safety and Compliance Symposium are at:

http://www.ieee-pses.org/symposium/abstracts.html

PSEN Publication Schedule

The Product Safety Engineering Newsletter is published quarterly during
the 
last month of each calendar quarter. The following deadlines are
necessary 
in order to meet that schedule.

Closing dates for submitted articles

1Q issue: February 1
2Q issue: May 1
3Q issue: August 1
4Q issue: November 1

Closing dates for news items

1Q issue: February 15
2Q issue: May 15
3Q issue: August 15
4Q issue: November 15

eDJ Publication Schedule

The eDJ is published as a special section of the PSEN. Contact Mike
Sherman 
for details.

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc



RE: Requirements for evaluations kits

2006-06-21 Thread emc-p...@ieee.org
Hi,

There is a guidance document on radio kits from the RTTECA. 

http://www.rtteca.com/TGN02.doc

Regards

Allen


From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Kim Boll Jensen
Sent: 20 June 2006 15:32
To: EMC PSTC
Subject: Requirements for evaluations kits

Hi all

I have a special evaluation kit consisting of both GSM, Bluetooth and
several HW com lines. It will be sold world wide in rather big quantities,
and therefore I will like to know under which rules it can be sold arround
the world.

Any answer just concerning one or mor countries are very welcome.

Best regards.

Kim Boll Jensen
Bolls Rådgivning
Ved Gadekæret 11F
DK-3660 Stenløse

Tlf.:  48 18 35 66
Fax:   48 18 35 30
Mobil: 22 99 69 91

E-mail: k...@bolls.dk
web: www.bolls.dk

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc



Re: CISPR22 Edition 5 SLCE and Ethernet

2006-06-21 Thread emc-p...@ieee.org
In message 
062120060433.25342.4498CC271E7162FE2207020853CECE020A900A02@comc
ast.net, dated Wed, 21 Jun 2006, neve...@comcast.net writes
I am looking for the actual data supporting the chosen LCL 
characteristics for the CAT5, 6 and 7 ISN per the standard. 

Yes, and I think that data (or a specification for the balance of the 
cables) may be in the standards I mentioned. Of course, you are also 
concerned with the impedance balance specifications at the cable ports, 
and I suppose those are specified in the Ethernet standards, which are 
not, of course, IEC standards. I believe they are very large, but I 
don't know where you get them from.
-- 
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

-

This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website:  http://www.ieee-pses.org/

To post a message to the list, send your e-mail to emc-p...@ieee.org

Instructions:  http://listserv.ieee.org/request/user-guide.html

List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:

 Scott Douglas   emcp...@ptcnh.net
 Mike Cantwell   mcantw...@ieee.org

For policy questions, send mail to:

 Jim Bacher: j.bac...@ieee.org
 David Heald:emc-p...@daveheald.com

All emc-pstc postings are archived and searchable on the web at:

http://www.ieeecommunities.org/emc-pstc



RE: Source for soft copy network licensed Euro Normes, and maybe consolidated versions!?!?

2006-06-21 Thread emc-p...@ieee.org
We have used British Standards in the past for a multi site licence
agreement, they do have a partner in the US.

Also ILI in the UK have quoted us in the past for multi licence downloads.


as a final note I shall be leaving my job here at the end of June and would
like to thank everyone on the list for their help and contributions, they
have help  tremendously over the years.


Many Thanks

   Keith Spicer
   Chief Engineer
   Quality Assurance
   Defence Tactical Communications
   Thales Land  Joint Systems
   Worton Grange
   Reading
RG2 0SB
   Tel. 0118 923 8441
   Fax 0118 923 8459
 
 
The information contained in this e-mail is confidential.
It may also be legally privileged. It is intended only for the stated
addressee(s) and access to it by any other person is unauthorised. If you
are not an addressee, you must not disclose, copy, circulate or in any other
way use or rely on the information contained in this e-mail. Such
unauthorised use may be unlawful. We may monitor all e-mail communications
through our networks.

If you have received this e-mail in error, please inform us
immediately on +44 (0) 1293 518855 and delete it and all copies from your
system.

We accept no responsibility for changes to any e-mail which
occur after it has been sent.  Attachments to this e-mail may contain
software viruses which could damage your system.  We therefore recommend you
virus-check all attachments before opening.
 
A business of Thales UK Ltd.
Registered Office: 2 Dashwood Lang Road, The Bourne Business Park,
Addlestone, Weybridge, Surrey KT15 2NX Registered in England No.
868273Business Park, Addlestone, Weybridge, Surrey KT15
   2NX Registered in England No. 868273.
 



From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of Jim
Eichner
Sent: 20 June 2006 20:40
To: emc-p...@ieee.org
Subject: RE: Source for soft copy network licensed Euro Normes, and
maybe consolidated versions!?!?


No takers?  Not a single bite so far!  Do I take that to mean nobody has
found anyone that offers what I'm after?

Just in case that's the situation, let me open it up a bit.  Who are
people using for network licensed soft copies of EN's, and what features
do they offer?

Thanks,

Jim Eichner, P.Eng. 
Compliance Engineering Manager
Xantrex Technology Inc. 
e-mail: jim.eich...@xantrex.com 
web: www.xantrex.com 
Any opinions expressed are those of my invisible friend.
Confidentiality Notice: This email message, including any attachments,
is for the sole use of the intended recipient(s) and may contain
confidential and privileged information. Any unauthorized review, use,
disclosure or distribution is prohibited. If you are not the intended
recipient, please contact the sender by reply e-mail and destroy all
copies of the original message.




From: emc-p...@ieee.org  On Behalf Of Jim Eichner
Sent: Thursday, June 15, 2006 12:39 PM
To: emc-p...@ieee.org
Subject: Source for soft copy network licensed Euro Normes, and maybe
consolidated versions!?!?

Like I'm sure many of you do, we maintain a collection of EN's in soft
copy on our network.  

Being good corporate citizens, when we set this up we searched around
for sources that could give us what we needed (in English, by the way)
with a license that either directly allowed network installation, or at
least did not preclude network installation.  We ended up with ILI
Infodisk, who gives us network licensed subscriptions (automatic
updates) to EN's published by Irish Standards.  The service has been
good and their pricing was competitive at the time.  But it's been a few
years, and I want to do a bit of comparison shopping.

My question is who are people using for this?  Specifically, who can
people recommend that fit the following criteria:

Mandatory:

- English language EN's (primarily for LVD and EMCD)
- PDF or other convenient soft-copy format
- legally allowed to be installed on our corporate intranet
- able to copy and paste extracts out of the standards (for design
doc's, e-mails etc.)
- able to print from the standards
- automatic notification of availability of revisions and new versions

Desired but not mandatory:
- consolidated editions (*see below)
- able to annotate the standards electronically (e.g. using the comments
tool in Acrobat Reader) so that we can highlight passages, put in
clarifying notes, etc.)
- automatic downloads of revisions and new versions

A far distant second choice would be internet-based access.

Regarding my term consolidated editions, here's what I'm on about.  It
drives me nuts that the standards we currently receive have a structure

Re: CISPR22 Edition 5 SLCE and Ethernet

2006-06-21 Thread emc-p...@ieee.org
John,
 
I am looking for the actual data supporting the chosen LCL characteristics for
the CAT5, 6 and 7 ISN per the standard. According to the described intent of
the standard, the ISN characteristics are such to purposely introduce
imbalance, supposedly to replicate the LCL characteristics of a typical
network installation, but I do not find any published data on the LCL of the
typical CAT5, 6, and 7 installations.
 
The method of the measuremtn is described in ITU-T G.117 standard. I hope that
there is a considerable work somewhere available that supports the chosen
CAT5, 6, and 7 LCL characteristics, but I also fear that the information is
not available, and I believe it should certainly be available for a standard
with such a broad consequence for the industry.
 
My back-of-the-envelope calculation tells me that 10 BaseT Ethernet, with
maximum 5.6Vpk-pk amplitude, as defined per IEEE 802.3 standard is most likely
to fail ClassB limit with the CAT5 LCL as defined by CISPR22, 2005. Most
manufacturers do not generate as high voltage, but it is possible per the IEEE
Ethernet standard. Laptop/PC and other SOHO Ethernet-product manufacturers are
going to have hell of a time trying to make it through.
 
Regards, Neven

-- Original message -- 
From: John Woodgate j...@jmwa.demon.co.uk 

 In message 
 062020062152.8474.44986E288DE2211A2205886442CECE020A900A02@comca 
 st.net, dated Tue, 20 Jun 2006, neve...@comcast.net writes 
 
 Does anyone have or know the sources (preferably published, verifiable, 
 with the exact test method described) of the LCL (Longitudinal 
 Conversion Loss, i.e. balance) of typical installation that support 
 the LCL values required by CSPR22 for ISN for CAT5, 6, and 7 cables? 
 (CISPR22 5th edition, 2005, page 51) 
 
 Are you looking for a method of testing the actual cables for unbalance? 
 
 I think you need to look at IEC standards in the IEC 61156 series, at: 
 
 http://tinyurl.com/zarag 
  If you click on the standard number, you get a detailed page about it, 
 and if you click on the 'Preview' icon you get the Table of contents, 
 the Scope clause and a few more pages of the standard to view for free. 
 -- 
 OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 
 2006 is YMMVI- Your mileage may vary immensely. 
 
 John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK 


-  This
message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. Website: http://www.ieee-pses.org/ 

To post a message to the list, send your e-mail to emc-p...@ieee.org 


Instructions: http://listserv.ieee.org/request/user-guide.html 


List rules: http://www.ieee-pses.org/listrules.html 


For help, send mail to the list administrators: 


Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org 


For policy questions, send mail to: 


Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com 


All emc-pstc postings are archived and searchable on the web at: 


http://www.ieeecommunities.org/emc-pstc