Assume complete ignorance on my part. What is the safety concern?
on 3/5/03 3:50 PM, Knighten, Jim L at [email protected] wrote: > Ken, > > Safety considerations are the reason for the spec requirement. You are > allowed to ground the shield at one point. > > Try using a BNC coax connector with a built-in capacitor to ground. That > gives you an AC connection to ground and is often quite effective. These > are off-the-shelf parts. > > Jim > > > Jim Knighten, Ph.D. > Teradata, a Division of NCR http://www.ncr.com > 17095 Via Del Campo > San Diego, CA 92127 > USA > Tel: 858-485-2537 > Fax: 858-485-3788 > [email protected] > > -----Original Message----- > From: Ken Javor [mailto:[email protected]] > Sent: Wednesday, March 05, 2003 12:38 PM > To: [email protected] > Subject: Ethernet coax connection > > > Question for list members: > > Background: I am troubleshooting a complex integration of military hardware > and COTS. One COTS piece of equipment has an RG-58 coaxial connection, but > the coax connector is an isolated feedthrough bnc. From a radiated > emissions point-of-view, that is hurting us. One of the engineers here said > that is part of the spec - Ethernet shields are not supposed to be chassis > grounded. > > Question: Can someone please explain the reason for that, and how this is > usually handled to minimize radiated emissions? > > Thank you. > > Ken Javor > EMC Compliance > Huntsville, Alabama > 256/650-5261 > > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > Archive is being moved, we will announce when it is back on-line. > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > -- Ken Javor EMC Compliance Huntsville, Alabama 256/650-5261 This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
