: jim.eich...@xantrex.com
web: www.xantrex.com
-Original Message-
From: richwo...@tycoint.com [mailto:richwo...@tycoint.com]
Sent: Tuesday, January 29, 2002 9:49 AM
To: emc-p...@majordomo.ieee.org
Subject: RE: SV: Generic emissions - EN 61000-6-3
As long as we are getting picky, let's
I read in !emc-pstc that Brian Jones e...@brianjones.co.uk wrote (in
009001c1a8d0$c4fc0840$d841c0c1@oemcomputer) about 'SV: Generic
emissions - EN 61000-6-3', on Tue, 29 Jan 2002:
It is not true that all ENs are harmonised. The term, in this context,
means specifically ENs which have been
Best wishes
Brian Jones
EMC Consultant and Competent Body Signatory
- Original Message -
From: John Woodgate j...@jmwa.demon.co.uk
To: emc-p...@majordomo.ieee.org
Sent: Tuesday, January 29, 2002 10:46 AM
Subject: Re: SV: Generic emissions - EN 61000
I read in !emc-pstc that am...@westin-emission.no wrote (in LFENJLPMMJB
mhpeibnilaehgccaa.am...@westin-emission.no) about 'SV: Generic
emissions - EN 61000-6-3', on Tue, 29 Jan 2002:
AFAIK EN61000-6-3 is not harmonized yet.
ALL ENs are AUTOMATICALLY harmonized. I expect you mean that it may
[mailto:owner-emc-p...@majordomo.ieee.org]Pa vegne av Chris Chileshe
Sendt: 28. januar 2002 15:41
Til: emc-p...@majordomo.ieee.org
Emne: Generic emissions - EN 61000-6-3
Hi Group,
I have just been touring the BSI website and discovered that the generic
emissions standard EN 50081-1 for residential
Hi Group,
I have just been touring the BSI website and discovered that the generic
emissions standard EN 50081-1 for residential, commercial and light
industrial, although current, has been superceded by EN 61000-6-3.
If anyone has got a copy of this standard already, could they kindly
advise
Hi Richard,
It is a test measurement product used in a telecom environment. So we
often test DC conducted emissions on the 48VDC input to a hodge-podge
combination of EN61326-1(which uses EN 55022 limits), 300386-X and
certain customer specific EMC standards. Some of our customers
reference
Is this a telecommunications product?
if so, then need DC conducted Emissions
to new EU std. 300386.
Done from 20khz to 30mhz.
If product is ITE, then NO DC cond. is needed.
Richard,
-Original Message-
From: Chris Maxwell [mailto:chris.maxw...@nettest.com]
Sent: Wednesday, January 23
:32 GMT Standard Time, ri...@sdd.hp.com
writes:
Subj:Harmonic current emissions
Date:23/01/02 20:11:32 GMT Standard Time
From:ri...@sdd.hp.com (Rich Nute)
Sender:owner-emc-p...@majordomo.ieee.org
Reply-to: A HREF=mailto:ri...@sdd.hp.com;ri...@sdd.hp.com/A (Rich Nute)
To:cherryclo
I read in !emc-pstc that Rich Nute ri...@sdd.hp.com wrote (in
200201232308.paa21...@epgc264.sdd.hp.com) about 'Harmonic current
emissions', on Wed, 23 Jan 2002:
The additional cost for a PF-corrected SMPS is
not a constant adder; it is proportional to
power output. One must use higher power
Hi John:
But whichever method is adopted, the customer pays the bill eventually
and I
have more confidence in the highly competitive world of electronic
products
to come up with a cost-effective solution in a timely manner.
One of the USA's major objections to
Hi guys,
Remember, this is just my opinion. I work for a manufacturer, not a
test lab; so this is a side job (a HUGE side job); not my life.
For John:
We do test the DC input of our rack-mount 48VDC products for conducted
emissions. Many of our customers for these systems demand conducted
I read in !emc-pstc that Rich Nute ri...@sdd.hp.com wrote (in
200201232003.maa21...@epgc264.sdd.hp.com) about 'Harmonic current
emissions', on Wed, 23 Jan 2002:
Hi Keith and Ghery:
There are a number of effects of harmonic current
emission from non-linear loads.
1) When a large number
have some knowledge of power-factor correction techniques in switch-mode
supplies, and some of them can cost very little indeed. So I really don't
know why the US computer industry is making such a fuss about controlling
harmonic emissions.
I certainly have not seen low-cost PF correction
HI all,
I have a question regarding performing conducted emissions on a wall mount
power supply.
When looking at EN 55022 test setup it shows EUT on tabletop with 80 cms from
EUT to AMN and bundled cord between AMN and EUT.
If you where testing a wall mount power supply does anyone feel
My own personal experience bears this out.
on 1/10/02 3:39 PM, Patrick Lawler at plaw...@west.net wrote:
I belive emissions standards were designed to allow proper operation of radios
and televisions with minimal irritation. This would include sound and video
quality. I heard this story
I belive emissions standards were designed to allow proper operation of radios
and televisions with minimal irritation. This would include sound and video
quality. I heard this story a long time ago with respect to FCC limits.
On the other hand, immunity standards were developed so equipment
Hi Folks.
At the moment I'm examining as a generic case, the potential for
interference with Item A (tested to comply with 3V/m radiated immunity)
caused by Item B (tested to comply with FCC or EN Class A [industrial]
emissions).
Using simple inverse distance ( E2 = E1 x d1/d2 ) extrapolation
This won't affect most of the people on this mailing list, but some
may be interested.
Directive 2000/14/EC of the European Parliament and the Council of 8
May 2000 on the approximation of the laws of the Member States
relating to the noise emission in the environment by equipment for
use
taniagr...@msn.com
- Original Message -
From: Chris Chileshe
Sent: Friday, November 16, 2001 7:45 AM
To: 'Ken Javor'; Nerad, Daren HS-SNS; 'John Woodgate';
emc-p...@majordomo.ieee.org
Subject: RE: Conducted emissions - frequencies lower than 150kHz
Is Minks the plural for 'Mink
Is Minks the plural for 'Mink' or is it always Mink in both singular and
plural?
Have I been misinformed?
Regards
- Chris
_
This message has been checked for all known viruses by Star Internet
delivered through the
I read in !emc-pstc that Scott Lemon sle...@caspiannetworks.com wrote
(in 3be064c5.e48c3...@caspiannetworks.com) about 'Radiated Emissions
EUT Config', on Wed, 31 Oct 2001:
I am in search of opinions regarding the acceptable EUT configuration
for radiated emissions testing. If a system
Hello Group,
I am in search of opinions regarding the acceptable EUT configuration
for radiated emissions testing. If a system is comprised of one or more
independent shelf-level products (e.g. one shelf in a rack or several
racks full), at what level is it acceptable to test? Assume
I read in !emc-pstc that Lothar Schmidt lothar.schm...@cetecomusa.com
wrote (in 5EFB06767D7DD211828C0008C74CE95B414D40@CALVIN) about 'Keep
off the grass: RF emissions!', on Mon, 29 Oct 2001:
I guess the EN 55014-1,2 would be more applicable regarding EMC in Europe.
They are written very largely
.
411 Dixon Landing Road
Milpitas, CA 95035
* +1 408 586 6214
* +1 408 586 6299
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Monday, October 29, 2001 8:39 AM
To: emc-p...@majordomo.ieee.org
Subject: Re: Keep off the grass: RF emissions!
I read in !emc-pstc
I read in !emc-pstc that Massimo Polignano
massimo.polign...@esaote.com wrote (in OFB42F2B94.C5CABD33-ONC1256AF4
..00369...@esaote.com) about 'Keep off the grass: RF emissions!', on
Mon, 29 Oct 2001:
Is there any applicable product standard dealing with EMC and safety of
that kind of devices
Alspaugh/Lex/Lexmark)
Subject: RE: Keep off the grass: RF emissions!
If it is an intentional radiator and operates above 9 kHz, it is considered
to be a transmitter. If so, it is considered to be an inductive loop short
range device in Europe and subject to EN 300330-1 and -2 for radio emissions
If it is an intentional radiator and operates above 9 kHz, it is considered
to be a transmitter. If so, it is considered to be an inductive loop short
range device in Europe and subject to EN 300330-1 and -2 for radio emissions
and EN 301489-1 and -3 for spurious emissions and immunity. FCC Part
Hello everybody!
A friend of mine, overthinking of the breadth of my knowledge, is asking me
for some advise about the applicable standards to a rather unusual piece of
equipment. It is a auto mower intended to be programmed by the user to
cut within a given garden area. It makes use of a
it to markets where the EMC
laws are mandatory.
- What Standards apply for this kind of product?? (FCC XXX, EN XXX)??
- Does this kind of equipment need to be tested for electromagnetic
emissions (conducted and radiated)??? Its only supply is the Public
Telephony Network, that in Brazil supplies a voltage
In a message dated 6/28/01, Geoff Lister writes:
EN55022:1998 section 9.5 indicates that measurements must
be made on telecommunication ports, and covers, in great detail
Hi Muriel:
Geoff has provided a succinct answer to the question you posed. I just want
to add that you will also have
[mailto:mur...@eel.ufsc.br]
Sent: 27 June 2001 22:57
To: EMC-PSTC List
Subject: Conducted Emissions Test in Telephones
Hello Group,
I'd like to know if telephone devices (plain telephone devices) must be
tested for conducted emissions (CISPR 22, Class B). And if they must, what
is the proceeding
Hello Group,
I'd like to know if telephone devices (plain telephone devices) must be tested
for conducted emissions (CISPR 22, Class B). And if they must, what is the
proceeding for testing them? Should I test with the telephone in stand-by (no
calls) or during a call??
Thanks in advance
, assuming you are routing feeder and return together, you can limit the
control to common mode emissions.
--
From: Terry Meck tjm...@accusort.com
To: emc-p...@ieee.org
Subject: EN 55022 Conducted emissions DC
Date: Tue, May 15, 2001, 3:06 PM
Hello all,
Is there any new requirement
Hello all,
Is there any new requirement on doing conducted emissions testing on
distributed DC inside a building.
RE: EN 55022:1998
The DC comes from an AC - DC supply (compliant).
Would there be a cable length above which the conducted test must be done?
I know some immunity tests are required
. It is at an early stage at
present, but those concerned should keep a look out for it and decide
whether they need to participate in the work at national or
international level.
Previously, work in UK had suggested that no change was necessary. Some
new effect of emissions from dithered clocks may
to participate in the work at national or
international level.
Previously, work in UK had suggested that no change was necessary. Some
new effect of emissions from dithered clocks may have emerged.
--
Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839
Fax +44 (0)1268 777124
Thanks to all who responded to my question on Class A Emissions/Class B
Immunity. I would like to do a quantitative analysis of the groups opinion
on this issue. The follwoing questions require only yes/no answers.
Please do not respond to the group. If you would like the results
radioélectrique édicté par Industrie
Canada.
Best regards,
Benoît Nadeau
3/23/2001 -0500, John Juhasz wrote:
Hello all . . .
I am looking for the French 'part 15' (ICES-003) statement for radiated
emissions compliance.
I have the text but my marketing folks are looking for the statement
Hi group,
It's Friday and thinking hurts the head on a Friday, so I'll take the easier
option and just ask.
I have just returned from emissions testing on a new product. The product
uses a DSP which runs off an 8Mhz oscillator and internally 'ups' this to
40Mhz. It also has a CLOCK_OUT pin
Is anyone familiar with limits to operating frequencies for ISM equipment in
Lithuania? I've checked http://www.radio.lt/frequency_table.htm
and I note several bands (6MHz) _reserved_ for use by ISM, but are there any
corresponding prohibitions for ISM operation? My induction heating equipment
...@emccompliance.com, 'praveen rao'
p...@tennyson.com.au, 'muriel bittencourt de liz'
mur...@grucad.ufsc.br
Cc: emc-p...@majordomo.ieee.org
Subject: RE: Doubt with conducted emissions measurement
Date: Thu, Dec 28, 2000, 6:27 PM
Hi Ken,
Ok, you caught me exercising a pet peeve (hop up here on the table peeve
: Re: Doubt with conducted emissions measurement
Hi Brent,
Specifically NOT meaning to argue, but only in pursuit of the TRUTH, isn't
the 10 uF feedthrough cap a perfectly well-defined source impedance above,
say 15/20 kHz, where the old MIL-STD-461A/B/C CE03 limit started? Which is
not to say
Javor
--
From: Brent G DeWitt bdew...@ix.netcom.com
To: 'Ken Javor' ken.ja...@emccompliance.com, 'Praveen Rao'
p...@tennyson.com.au, 'Muriel Bittencourt de Liz'
mur...@grucad.ufsc.br
Cc: emc-p...@majordomo.ieee.org
Subject: RE: Doubt with conducted emissions measurement
Date: Tue, Dec 26
with conducted emissions measurement
2) Why does Mr., Rao (or anyone else) feel that the LISN-based measurement
is more accurate than a current probe measurement? I can see pros and cons
to each, myself.
---
This message is from the IEEE EMC Society Product
...@majordomo.ieee.org
Subject: RE: Doubt with conducted emissions measurement
Date: Tue, Dec 26, 2000, 5:26 PM
Hi Muriel and group,
Hope you all had a good Christmas.
Yes, As Chris mentions, there can be problems with coupling/de-coupling
networks.
A classic example is the T-ISNs for conducted emissions
Hi Muriel and group,
Hope you all had a good Christmas.
Yes, As Chris mentions, there can be problems with coupling/de-coupling
networks.
A classic example is the T-ISNs for conducted emissions on telecommunication
lines as per the new EN55022 : 1998
The mains LISN however causing problems
-Original Message-
From: Muriel Bittencourt de Liz [mailto:mur...@grucad.ufsc.br]
Sent: Friday, December 22, 2000 8:05 AM
To: Lista de EMC da IEEE
Subject: Doubt with conducted emissions measurement
Hello Group!
First of all, I wish a merry christmas and a happy new year for the list
Muriel,
Coupling/Decoupling networks (of which LISN's are a subgroup) can affect DUT
performance. I myself have not experienced this with a conducted emissions
LISN, but I have experienced it with an EFT generator.
We made a product that had an internal thermal printer. We EFT test in
house
11:05 AM
To: Lista de EMC da IEEE
Subject:Doubt with conducted emissions measurement
Hello Group!
First of all, I wish a merry christmas and a happy new year for the list
members.
Second, I'd like to solve a doubt. It concerns the methodology of
conducted emissions tests.
Let's
filter supplies
enough local energy storage such that the EUT requires only power-line
frequency replenishment from the mains.
2) The military did use feedthrough capacitors and current probes from 1967
- 1993 to stabilize and measure current conducted emissions. Since '93,
they have gone back to LISNs
Hello Group!
First of all, I wish a merry christmas and a happy new year for the list
members.
Second, I'd like to solve a doubt. It concerns the methodology of
conducted emissions tests.
Let's suppose a power electronic equipment (static converter) that has a
boost converter in the entrance
I'll be testing a product to FCC Part 18 for the first time, and I'm trying
to familiarize myself with the limits in this requirement.
In section 18.307(a), conducted emissions limits are specified for
ultrasonic equipment. They start at 10kHz, and stop at 30MHz.
Yet the measurement procedure
Esteemed colleges,
I have a question pertaining to conducted emissions performed on a port that
is exclusively for the purpose of powering an auxiliary device that we do
not manufacture. Our equipment is portable test equipment. This port will
supply 28VDC at 1.5A to a piece of equipment
with Telecom standards, should we raise our price for
the extra cost? :-)
Barry
-
On Thu, 16 November 2000, Dick Grobner wrote:
Short range device? Look at ETSI 300-683, EMC Std for Short Range Devices -
operating freq. 9kHz to 25GHz. Chapter 8 deals with emissions.
Hope this helps
Short range device? Look at ETSI 300-683, EMC Std for Short Range Devices -
operating freq. 9kHz to 25GHz. Chapter 8 deals with emissions.
Hope this helps!
-Original Message-
From: wo...@sensormatic.com [mailto:wo...@sensormatic.com]
Sent: Wednesday, November 15, 2000 3:10 PM
To: emc-p
I am going to ask my previous question in a different (and, hopefully,
improved) way. Assume I have an ITE device that is an unintentional radiator
(i.e., it is not a transmitter). Also assume the device has spurious
emissions above 1 GHz that may not be insignificant. In order to comply
that intentionally generates and
uses 2.45 GHz signals. EN55022 does not provide limits above 1 GHz. Is there
another harmonized EN that can be applied for spurious emissions above 1
GHz? If not, will this product have to be submitted to a Competent Body?
Richard Woods
I have an Information Technology device that intentionally generates and
uses 2.45 GHz signals. EN55022 does not provide limits above 1 GHz. Is there
another harmonized EN that can be applied for spurious emissions above 1
GHz? If not, will this product have to be submitted to a Competent Body
Just curious: Isn't there some upper frequency cut-off here, regardless of
where a fifth harmonic falls? What radio link would be disturbed at 220
GHz?
--
From: Leslie Bai leslie_...@yahoo.com
To: emc-p...@ieee.org
Subject: Spurious Emissions Test up to 220GHz
Date: Thu, Nov 2, 2000, 6
Hello, Group,
Is there any lab who can test radiated spurious
emissions up to 220GHz (5th harmonics of radio
operating at 38GHz)?
Is there any supplier who can provide pre-amplifier(s)
and harmonics mixer(s) up to 220GHz for this
measurement (I already have all antennae up to
220GHz)?
Thanks
Forwarded for John --mg
Group,
We are engaged in re-arranging our conformance lab and are looking to save
space by permanently installing the 50m of cable used to connect our EUT
(motor drive) to its load (a 3phase motor and load). I have a couple of
questions:
Is the capacity of the cable
will be commencing work shortly on updating AS/NZS 3548 to align with
the latest version etc of CISPR etc. It is therefore not likely this will
be completed year. At this time it is not clear if the conducted emissions
requirements on telecom ports will be included in the new version or not.
Best regards,
Kevin
I am just rejoining the forum after a few weeks absence for vacation and
server/domain changes.
Early in September it appeared that the harmonic emissions standard EN
61000-3-2 might be ammended (with A14) to redefine equipment
classifications, specifically Class D. Does anyone have a reliable
...@geneticmicro.com]
Sent: Tuesday, September 26, 2000 4:41 PM
To: IEEE EMC Forum (E-mail)
Subject: Harmonic emissions
I am just rejoining the forum after a few weeks absence for vacation
and
server/domain changes.
Early in September it appeared
emissions
I am just rejoining the forum after a few weeks absence for vacation and
server/domain changes.
Early in September it appeared that the harmonic emissions standard EN
61000-3-2 might be ammended (with A14) to redefine equipment
classifications, specifically Class D. Does anyone have
the chamber for radiated emissions measurements.
This is where my question comes up. The chamber is not calibrated for
emissions. However, over the last few years, every time I have taken a DUT
to a 10meter OATS (at an outside test lab), I put the same DUT in the
chamber and connect the chamber's coax
-
From: Maxwell, Chris [mailto:chr...@gnlp.com]
Sent: Wednesday, September 20, 2000 7:34 AM
To: 'EMC-PSTC Internet Forum'
Subject: Stripline Cell Use for Radiated Emissions
All,
We have been using a Comtest G310 0.7m x 0.7m x 0.7m Stripline cell for a
few years now. For those unfamiliar
Hello group,
Does Australia implement (or plan to implement) limits for conducted emissions
on telecom ports as in EN 55022:1998?
Also, who makes T-LISNs for these tests?
Thanks,
David.
David Gelfand
Regulatory Approvals
Memotec Communications Inc.
Montreal Canada
Does anyone know if there is a power factor correction module available that can
be fitted externally onto an existing power supply to enable it to pass the EN
61000-3-2 standard? We envision a module that would be installed between the AC
mains source and the AC input to the power supply.
forwarding for johnwag...@avaya.com
Reply Separator
Subject:RE: Harmonics Emissions
Author: Wagner; John P (John) johnwag...@avaya.com
List-Post: emc-pstc@listserv.ieee.org
Date: 9/12/00 3:01 PM
A ferroresonant transformer such as those made
of twisted pair connectivity
rules for each ANSI/IEEE 802.x LAN technology, emissions, immunity,
cable grade etc., including coupling (remember TokenRing was 4 and 16
MHz, and Ethernet was 10 MHz so the harmonics were there).
David
__ Reply
...@transition.com
To: ieee pstc list emc-p...@ieee.org
Sent: Thursday, September 07, 2000 1:35 PM
Subject: RE: R: Conducted Emissions on Telecom Ports
Has anyone seen problems with ethernet and conducted emissions? I have a
home office with 4 PCs networked with ethernet running over UTP and I
, 2000 8:37 AM
To: Gary McInturff; Pettit, Ghery; david_ster...@ademco.com;
emc-p...@ieee.org
Subject: Re: Conducted Emissions on Telecom Ports
Reference CISPR 22:1997, Clause 3.5
telecommunication ports
Ports which are intended to be connected to telecommunication networks (e.g.
public switched
...@ieee.org
Subject: R: R: Conducted Emissions on Telecom Ports
Date: Fri, Sep 8, 2000, 3:51 AM
Ken and Cortland and many others that entered this subject :
First, radiated emissions are best measured with radiated (not conducted)
measurements. There is a correlation between CM currents and RE
...@compuprint.it]
Reply To: Paolo Roncone
Sent: Friday, September 08, 2000 3:51 AM
To: 'Ken Javor'; 'Cortland Richmond'
Cc: 'emc-p...@ieee.org'
Subject: R: R: Conducted Emissions on Telecom Ports
Ken and Cortland and many others that entered this subject :
First, radiated
.
Regards,
Eric Lifsey
Please respond to Pettit, Ghery ghery.pet...@intel.com
To: Eric Lifsey/AUS/NIC@NIC, emc-p...@ieee.org
cc:
Subject: RE: Conducted Emissions on Telecom Ports
This sort of question has already come up in CISPR SC G (the owner of CISPR
22). There is a CDV (Committee Draft
Paolo,
You bring up an interesting point about FCC. FCC recognizes CISPR
22:1985 is as an alternative test method. The 1985 version does not
specify emissions on LAN or telco.
FCC Part 68 specifies conducted emissions only on mains cables over
450kHz
because a
piece of equipemnt is passing CE or any emissions does not guarrenty that it
will not cause a problem with other equipment. Coupling between adjacent
cabling can cause EMC issues even if both unit pass CE. Primarily, all
emissions limits, CE and RE, exist to provide a level of protection
Ken and Cortland and many others that entered this subject :
First, radiated emissions are best measured with radiated (not conducted)
measurements. There is a correlation between CM currents and RE but that's not
all (resonances, cable layout etc. count a lot).
Second, you say that CE
a shielded
system that would outperform UTP using the interface
circuits I had design input on. (When I first proposed the
circuitry, the group had an internal Bell Labs balun
expert review it. He did not understand how it worked.)
Emissions were lower compared to several shielded systems we
measured
-5021
michael.sundst...@nokia.com
amateur call: KB5UKT
-Original Message-
From: EXT Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: Thursday, September 07, 2000 11:43 AM
To: Paolo Roncone; 'eric.lif...@ni.com'
Cc: 'emc-p...@ieee.org'
Subject: Re: R: Conducted Emissions on Telecom
:
that's the outside world in my humble opinion.
Conducted emission does not have to stay conducted. This test is also to
control low frequency ( 30 Mhz) radiated emissions.
STP will fix that, if the RJ connector permits the shield to connect VERY
WELL to the LAN's card bracket AND the bracket
Emissions on Telecom Ports
Hi all,
just thought I'd throw a few Euros in...
First, until folks in the computer world know what shielded cable means (
anything less that 40 dB is lossy insulation;-))) ), I'd stear clear of
specifying them. This is 20 years of experience talking, and shields
Has anyone seen problems with ethernet and conducted emissions? I have a
home office with 4 PCs networked with ethernet running over UTP and I
haven't seen much of a problem.
Granted, the longest cable run I have is to a file server in the basement
(about 10 meters) but both my AM radio and my
.3com.com; c...@prodigy.net; cet...@cetest.nl
Cc: emc-p...@ieee.org; gary.mcintu...@worldwidepackets.com;
john_mo...@eur.3com.com
Sent: 9/7/00 6:09 AM
Subject: RE: Conducted Emissions on Telecom Ports
Hello Group,
North America has likely the largest installed base of Ethernet,
Fast
common
mode CE on any port is not to protect equipment at the other end of the
cable, or other co-sited cables, but rather to control radiated emissions in
a frequency range in which CE are easier to measure than RE. In turn, the
purpose of controlling RE is to protect broadcast radio reception
( 'cause they are missinstalled ) than they fix: right Ken
J?
Second, the probability of interference ( or immunity ) from LAN wiring depends
a lot on where they are routed. If LAN wires are bundled with phone wires,
interference will result... Conducted emissions control on LANs will minimize
Paolo Roncone wrote:
The scope of emissions standard should be
to protect the outside (i.e. public)
environment from interference. So only
ports that connect to public telecom
networks should be covered by the standard.
I disagree.
The purpose of emissions standards is to prevent interference
Hi Eric,
I 100% agree with you. The scope of emissions standard should be to protect the
outside (i.e. public) environment from interference. So only ports that
connect to public telecom networks should be covered by the standard. The
problem is (as pointed out in one of the previous notes
.
Connectivity
Supposing your product manages to meet conducted emissions w/o STP,
what does it connect with? The other end of the cable can connect to
any compatible network product. If a PC hub or switch is relocated
can a company replace UTP with STP? To protect
Hello Group,
From EMC emissions point of view, any cable connected to any device
is prone to conducted emission problems. The is because grounding problems
in a PCB exist or enclosure currents flow between shielded connectors. This
leads to CM currents that will be measured.
The criterion
cc:(Chris Allen/GB/3Com)
Subject: Re: Conducted Emissions on Telecom Ports
I do not disagree with the positions posted on this subject. My question is
how does the EU interpret and enforce this requirement/definition.
Pryor
- Original Message -
From: david_ster...@ademco.com
.
David
__ Reply Separator
_
Subject: RE: Conducted Emissions on Telecom Ports
Author: Mowbray; John H SMTP:jm134...@exchange.canada.ncr.com at
ADEMCONET
List-Post: emc-pstc@listserv.ieee.org
Date:9/5/2000 12:06 PM
Gary
If you
LAN ports
Testing Conducted RF Emissions on LAN twisted-pair lines is almost
contrary to the intent of EN 55022 as Gary pointed out. Conducted
emissions is more appropriate for asynchronous analog lines.
LAN transmissions are digital and synchronous (except maybe
'; Pettit, Ghery; david_ster...@ademco.com;
emc-p...@ieee.org
Subject:RE: Conducted Emissions on Telecom Ports
Define telecom port.
A LAN port isn't neccessarily a LAN port. Ethernet ports do
not
connect directly to the Telecommunications network
-
From: Pryor McGinnis [mailto:c...@prodigy.net]
Sent: Tuesday, September 05, 2000 8:37 AM
To: Gary McInturff; Pettit, Ghery; david_ster...@ademco.com;
emc-p...@ieee.org
Subject: Re: Conducted Emissions on Telecom Ports
Reference CISPR 22:1997, Clause 3.5
telecommunication ports
Ports which
.
This definition indicates that LAN boards such as Ethernet Token Ring will
be treated as telecommunication ports and will require conducted emissions
to be performed as part of the emission testing.
This definition is carried over to EN 55022 and is effective next year.
Am I misinterpreting something
: Conducted Emissions on Telecom Ports
Confusing isn't?
- Original Message -
From: Pettit, Ghery ghery.pet...@intel.com
To: david_ster...@ademco.com; emc-p...@ieee.org; c...@prodigy.net
Sent: Wednesday, August 30, 2000 5:40 PM
Subject: RE: Conducted Emissions on Telecom Ports
Actually, it's
I attach my responses at the end of Mr. Lacey's, in CAPS. I disagree with
Mr. Lacey on some details.
--
From: Scott Lacey sco...@world.std.com
To: Muriel Bittencourt de Liz mur...@grucad.ufsc.br
Cc: emc-p...@ieee.org
Subject: RE: doubt on conducted emissions
Date: Thu, Aug 3, 2000, 6:49
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