I would apply Figure 5b of the 2nd edition on 61000-4-6, just forget the termination which is depicted on the right hand side (since in the EUT there is no other terminal than the one cable). Test level calibration according to the standard. There will be not much current until tens of MHz's where the stray capacitance starts to be a low Z. regards, Ari Honkala
_____ From: [email protected] [mailto:[email protected]] On Behalf Of ext Price, Ed Sent: 21. helmikuuta 2006 17:13 To: [email protected] Subject: EN61000-4-6:1996 I have been asked to do a Conducted Immunity test per BS EN61000-4-6:1996 on a gadget that mounts on the inside wall of a bus (and is accessible to the passengers). First, I think this isn't the latest version of this specification, but it is what the customer requested. This device has a completely non-conductive outer case. The only conductive point is on it's rear, where a 15-pin "D" connector supplies vehicle power through a shielded, twisted-pair cable. The customer asked for a "direct connection" test, as shown in Figure 2a, with a test level of 20 Volts. It seems to me that I will need to be able to generate about 100 Vpp and 200 Watts from my RF amplifier. Does the requested test level seem a bit extreme for a passenger bus application? Further, I don't understand how to measure the voltage Uo. Is this the voltage across the output of my 50-ohm RF source, or the voltage from the test specimen injection point to ground? And finally, Figure 2a implies a conductive test specimen case. How do you do this test for a non-conductive case, where the only conductive surface available is the length of the shielded power cable? I'd appreciate any comments or guidance. Regards, Ed Price [email protected] WB6WSN NARTE Certified EMC Engineer & Technician Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military & Avionics EMC Is Our Specialty - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
