coax grounding of E3/DS3 in the EU
Greetings all, I have a general question about E3/DS-3 in the EU. I have heard that it is no longer necessary to isolate one of the two Tx/Rx coax ports but can't find a definite answer. I'd like to know if I can directly tie both the TX and RX ports to chassis for intrabuilding only CO lines. This would make EMI/EMC much easier to pass and would get rid of the special AC coupling that would otherwise be necessary. The only reason that I could ever understand for the DC isolation requirements that used to be in place was to prevent ground connections in IBN CO's or to eliminate current on the shields due to differences in earth potential between buildings. As neither of these really apply, I really don't see why it should still be necessary to provide the DC isolation (I have only intrabuilding lines and most CO's are now CBN installations). Does anyone know what the current status on this is? Thanks, Patrick --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Korea and China - Thanks
Hello everyone. I want to thank everybody who sent me information on the list and privately. Fortunately for me this issue went away fast as it came up and I was told I don't need to pursue this any further for now. It looked like I was going to have big headaches - what ever would we do without marketing :-). Thanks again for everyone's help. This is truly a rich forum with a lot of expertise. Patrick --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Taiwan and China approvals?
Greetings everybody! My boss just asked me what the procedure and timeframe for getting into Korea and China was. (Imagine my distress ;-). For optical networking type products (no TNV ports) where all of our Safety, NEBS and EU (386, 019, 753, etc...) tesing is complete, does anyone know what to submit (and to whom) and how long this might take for China or Korea? more background - Luckily our CB report is from a Korea certified lab, but our emissions and immunity were from non-global (but EU CAB & NRTL status) labs that don't have Korean authorization. I've also done some looking into the new China CCC procedure. We're not specifically addressed in the catalogue. Does this mean we can just import our system? Any help on any of these points would be greatly appreciated! Thanks in advance, Patrick Fitzgibbon --- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
