Don,
I would assume that a "High Speed Bus" over 3 meters in length would most likely be a shielded cable. In this case you can't use the clamp. You'll have to use the direct couple method into the shield of the cable through a 100 ohm resistor. This method is also described in EN61000-4-6. Brian ____________________Reply Separator____________________ Subject: Re: EN 61000-4-6 CDNs for a high speed bus. Author: Chris Collin <[email protected]> List-Post: [email protected] Date: 8/1/00 4:12 PM Don, If no CDN networks are suitable - and indeed they are not for high communication lines -, you should consider the possibility to use the EM-clamp as described in EN61000-4-6. That's the way we perform tests without degradation of the EUT signals. Regards, Chris On Tue, 01 August 2000, [email protected] wrote: > > > Hello Friends, > > We are getting into faster interconnects that can be affected by the CDNs > called out by EN 61000-4-6. > > Has anyone tested a system consisting of an EUT connected to various > peripherals by USB, Firewire, 10 Base T or other bus configurations > considered "high speed" today? It seems decoupling by an inductor > 280 uH > @ 150 kHz as indicated in the various CDNs in Annex D should cause > considerable signal integrity issues even before the test signal is applied. > > If you have tested high speed interconnects to EN 61000-4-6, how did you > manage the signal integrity issues? Special CDNs? Special test setup? > This seems like a topic everyone would be interested in. > > Just call me curious, > > Don > > (not George) > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: [email protected] > Michael Garretson: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] _______________________________________________________________________ Free Unlimited Internet Access! Try it now! http://www.zdnet.com/downloads/altavista/index.html _______________________________________________________________________ ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
