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> To: <emc-p...@ieee.org>; <gary.mcintu...@worldwidepackets.com> Sent: Tuesday, September 05, 2000 2:07 PM Subject: RE: Conducted Emissions on Telecom Ports > > 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 ATM); the > receiver part of the interface circuitry locks onto the frequency of > data, rejecting spurious frequencies. The signals are truely digital, > not analog as in a modem. > > Arcnet, Ethernet, and Fast Ethernet TP cabling links two points (node, > hub, switch, bridge) which digitally reconstitute the signal, > eliminating spurious cable frequencies. > > Token-Ring is peer-peer, usually through a passive hub. Each node > (peer) reconstitutes the signal as above. > > Ethernet, F-E and Token-Ring ANSI/IEEE or ISO/IEC physical layer > requirements define interfaces, cable lengths/type(s) and timing. > > Coax cable rules for Arcnet, 10Base2 Ethernet) permit connection to > multiple nodes but again, the digital nature of the signals and the > well-defined connectivity rules prevent problems. > > David > > > ______________________________ Reply Separator > _________________________________ > Subject: RE: Conducted Emissions on Telecom Ports > Author: "Gary McInturff" <SMTP:gary.mcintu...@worldwidepackets.com> at > ADEMCONET > Date: 9/5/2000 10:54 AM > > > Define telecom port. > A LAN port isn't neccessarily a LAN port. Ethernet ports do not > connect directly to the Telecommunications network - a necessary condition > before being a telecommunications port. LANS and MANS operate all of the > time without any use of any telecommunications equipment. Generally, > Ethernet or Fast Ethernet for short distances and Gig Ethernet for longer > distances. IF -- the telecommunications lines are needed there is some sort > of "bridge" that takes the ethernet and its digitized Voice over Internet > Protocol (Voip) and does all of the phone stuff and makes the actual > metallic connection. That "birdge" has the only telecommunication ports on > it. > Gary > > > -----Original Message----- > From: Pryor McGinnis [mailto:c...@prodigy.net] > Sent: Thursday, August 31, 2000 6:24 AM > To: Pettit, Ghery; david_ster...@ademco.com; emc-p...@ieee.org > Subject: Re: 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 August 1, 2001 as posted in the OJ on January 25th of this > > year. You've got 1 less month to start testing to the new standard. > > > > Ghery Pettit > > Intel > > > > > > -----Original Message----- > > From: david_ster...@ademco.com [mailto:david_ster...@ademco.com] > > Sent: Wednesday, August 30, 2000 2:04 PM > > To: emc-p...@ieee.org; c...@prodigy.net > > Subject: RE: Conducted Emissions on Telecom Ports > > > > > > > > The date of withdrawal of EN 55022:1998 is September 1, 2001. Look > at > > the NIC manual's DofC --- the mfgr. may not be declaring compliance > to > > conducted emissions yet. > > > > > > ______________________________ Reply Separator > > _________________________________ > > Subject: Re: Conducted Emissions on Telecom Ports > > Author: "Pryor McGinnis" <SMTP:c...@prodigy.net> at ADEMCONET > > Date: 8/30/2000 10:31 AM > > > > > > Hello All, > > > > The question originated from a manufacturer of LAN boards who sells to end > > > users and to manufacturer's who integrate the LAN boards into end > products. > > > > I advised the LAN board manufacturer that conducted emissions would be > > required (with boards installed in typical host) on all LAN boards sold to > > > end users and manufacturers of products that integrated LAN boards should > > test the ports for conducted emission in their end product. The LAN board > > > manufacturer questioned double testing of the LAN boards. His concern is > > that boards that pass CE in a typical host may not pass in another > > manufacturer's end product (rub of the green). The LAN Board > manufacturer > > ask for second opinions. > > > > Many thanks for your answers. > > > > Best Regards, > > Pryor > > > > > -----Original Message----- > > > From: Pryor McGinnis [SMTP:c...@prodigy.net] > > > Sent: Tuesday, August 29, 2000 12:35 PM > > > To: emc-pstc > > > Subject: Conducted Emissions on Telecom Ports > > > > > > Below is a message from a non emc-pstc member. > > > > > > If a manufacturer purchases LAN boards which have been tested for > > > conducted emissions in a host, is the manufacturer required to retest > the > > > LAN Ports for conducted emissions if the manufacturer sells his product > > with > > > the LAN board installed? > > > > > > I am very interested in your comments. > > > > > > > > > Best Regards, > > > Pryor McGinnis > > > c...@prodigy.net <mailto:c...@prodigy.net> > > > www.ctl-lab.com <http://www.ctl-lab.com> > > > > > > ------------------------------------------- > > > This message is from the IEEE EMC Society Product Safety > > > Technical Committee emc-pstc discussion list. > > > > > > To cancel your subscription, send mail to: > > > majord...@ieee.org > > > with the single line: > > > unsubscribe emc-pstc > > > > > > For help, send mail to the list administrators: > > > Jim Bacher: jim_bac...@mail.monarch.com > > > Michael Garretson: pstc_ad...@garretson.org > > > > > > For policy questions, send mail to: > > > Richard Nute: ri...@ieee.org > > > > > > > > > > > > ------------------------------------------- > > This message is from the IEEE EMC Society Product Safety > > Technical Committee emc-pstc discussion list. > > > > To cancel your subscription, send mail to: > > majord...@ieee.org > > with the single line: > > unsubscribe emc-pstc > > > > For help, send mail to the list administrators: > > Jim Bacher: jim_bac...@mail.monarch.com > > Michael Garretson: pstc_ad...@garretson.org > > > > For policy questions, send mail to: > > Richard Nute: ri...@ieee.org > > > > ------------------------------------------- > > This message is from the IEEE EMC Society Product Safety > > Technical Committee emc-pstc discussion list. > > > > To cancel your subscription, send mail to: > > majord...@ieee.org > > with the single line: > > unsubscribe emc-pstc > > > > For help, send mail to the list administrators: > > Jim Bacher: jim_bac...@mail.monarch.com > > Michael Garretson: pstc_ad...@garretson.org > > > > For policy questions, send mail to: > > Richard Nute: ri...@ieee.org > > > > > > > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson: pstc_ad...@garretson.org > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson: pstc_ad...@garretson.org > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson: pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
