Hi Bob, Though I am not an EMC engineer, I found the vector network analyzer very useful for several measurements, which are also useful for EMC purposes.
In recent years much of my work has gone towards the design of power distribution networks on boards and packages. Any large resonances in these structures pose EMC risks, and a good way to check this is to measure the impedance of the power distribution network. For that purpose, hands down, vector network analyzers are the most universal and most accurate. I addition, you can make close and/or far-field radiation transfer function measurements if you excite your DUT with the active port of the network analyzer and pick up the radiation with an antenna connected to a passive port on the instrument. If you are looking only for structural resonances, the fact that this setup is hard to calibrate in absolute field-strength values is not a significant limitation. You may find some of the papers posted on the www.electrical-integrity.com <http://www.electrical-integrity.com/> website useful to explain and explore the network analyzer measurements. Thanks Istvan Novak Oracle On 3/29/2011 7:32 AM, [email protected] <mailto:[email protected]> wrote: I am not familiar with vector network analyzers. What practical measurements can be made with them from an EMC standpoint. I know that they can be used to determine site NSA. What other applications are they useful for? Thanks, Bob Heller 3M EMC Laboratory, 76-1-01 St. Paul, MN 55107-1208 Tel: 651-778-6336 Fax: 651-778-6252 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected] <mailto:[email protected]> > All emc-pstc postings are archived and searchable on the web at http://product-compliance.oc.ieee.org/ http://product-compliance.oc.ieee.org/> Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> Instructions: http://listserv.ieee.org/request/user-guide.html <http://listserv.ieee.org/request/user-guide.html> List rules: http://www.ieee-pses.org/listrules.html <http://www.ieee-pses.org/listrules.html> For help, send mail to the list administrators: Scott Douglas <[email protected] <mailto:[email protected]> > Mike Cantwell <[email protected] <mailto:[email protected]> > For policy questions, send mail to: Jim Bacher <[email protected] <mailto:[email protected]> > David Heald <[email protected] <mailto:[email protected]> > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ 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]>
