Re: EMC test chamber -- Reverberation and Others
Barry, NIST has put lots of effort to promote RC and achieved significant results through experimental approach. They deserved the honor of the best symposium paper. However, I guess we are the first team to study RC through modeling simulation approach building the 3-D RC model and obtaining the full wave solution of Maxwell equations. Lots of appreciation and encouragement was offered by audience after my presentation during the symposium. Does the community think our tried-out is a good kick-off??? Rgds, Leslie --- b...@anritsu.com wrote: Leslie, Thanks for the valuable info. You mentioned two articles in EMC'99 Seattle Symposium Record. Actually, right before them on pp. 1-6 of Vol. 1 is Reverberation Chamber Relationship: Corrections and Improvements by John Ladbury and Galen Koepke, which won the award of the best Symposium technical paper at Seattle. Barry Ma Morgan Hill, CA -- Original Text -- From: Leslie Bai leslie_...@yahoo.com, on 8/15/99 7:16 PM: I have studied Reverberation Chambers for some time, refer to recent EMC'99 Seattle Symposium Record Vol. 1, Page 7 to page 16. Measurement comparison will be published in the near future. Cost: RC is about 20 to 30% of an equivalent AC. Standards: There is a joint CISPR (emissions) and IEC (immunity) committee working to produce a common standard for RCs. Immunity standard can be found in IEC 61000-4-3, Anex I. I have no doubt there will eventually be an emissions standard which permits RC use. However, it is unlikely that an operative standard will be available in 2 years. Technology: RC uses statistical analysis to perform EMC measurement. It is realized by changing the boundary conditions using stirring paddle(s). However, the restriction of the Lowest Usable Frequency (LUF) may be a problem which is under study in the community. General comments: If you need to do emission and immunity certification testing in the near term, my recommendation would be for AC. It is the most expensive solution but it is acceptable today and if used properly (i.e., robust, many aspect angle tests) will provide detailed information on EUT characteristics. A RC will be a cost effective approach to a test facility for some test objectives (e.g., identifying emission frequencies very quickly and positively) and in the longer term will be the most cost effective. Rgds, Leslie --- Ray Levasseur ray_levass...@hotmail.com wrote: Thanks Barry for the suggestion but I know nothing about reverberation chambers, possibly somone could comment on the merits of RC over AC. Ray Levasseur EMC Compliance Creo Products From: b...@anritsu.com (Bailin Ma) Reply-To: b...@anritsu.com (Bailin Ma) To: emc-p...@ieee.org Subject: EMC test chamber -- Reverberation and Others Date: Fri, 13 Aug 1999 9:13:21 PDT Ray, Did you consider using Reverberation Chamber (RC) instead of semi-anechoic chamber for pre-compliance? It seems to me that RC technique has become practically applicable for both emission and immunity tests. It's less expensive. Official EMC standards would accept it in a couple of years. IEC 61000-4-21: Reverberation Chamber is circulating for comments. I know little about RC and expect some knowledgeable colleagues to make comments. Barry Ma Anritsu Company -Original Message- From: Ray Levasseur [mailto:ray_levass...@hotmail.com] Sent: Wednesday, August 11, 1999 2:44 PM To: emc-p...@majordomo.ieee.org Subject: Wanted:EMC test chamber Hi Group, I am setting up pre-compliance EMC testing at our facility and need some equipment to complete my setup. I was planning on a 3m shielded room with the possibility of making it semi-anechoic when the budget allows. Our products are large (relative to normal ITE equipment) with the largest that would be tested in the chamber 10ft wide X 6ft long X 3ft high. I have most of the equipment I need to do the tests for EN 55022 and EN 50082. I need a motorized antenna mast that goes from 1-4m and a chamber. If anyone could direct me to a person or company selling the chamber or antenna mast I would greatly appreciate it. Also I would like to get some feedback on the Cassper virtual chamber and if anyone has used it or has comments on the usability of such a system. Thanks, Ray Levasseur EMC Compliance, Creo Products - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators
RE: EMC test chamber -- Reverberation and Others
Hi Jim, You are right. There was a Session 1A -- Reverberation Chamber, consisting of 6 technical papers, pp. 1- 29, Vol. 1, 1999 IEEE EMC Symposium at Seattle. Besides it, there was a Tutorial Session WS3 -- Reverberation Chamber Workshop in the Symposium as well. It comprises T3.1Desired Characteristics of an EMC test T3.2Comments by Current RC users T3.3Measurement Procedures in RC T3.4Overview of RC Theory T3.5Status of RC Standards Barry Ma -- Original Text -- From: Knighten, Jim L jk100...@exchange.sandiegoca.ncr.com, on 8/16/99 8:45 AM: Guys, There was an entire session on Reverberation Chambers in the IEEE EMC Symposium held two weeks ago in Seattle. You might find some good stuff in the papers. If you are a Society member, they produced a CD-ROM of all the papers, which is available for the asking, I'm told. Like you, I am not an expert in Reverb chambers. Jim Dr. Jim Knightene-mail: jim.knigh...@sandiegoca.ncr.com mailto:jim.knigh...@sandiego.ncr.com Senior Consulting Engineer NCR 17095 Via del Campo San Diego, CA 92127 http://www.ncr.com http://www.ncr.com Tel: 858-485-2537 Fax: 858-485-3788 * Notice the Area Code change from 619 * -Original Message- From: Ray Levasseur [mailto:ray_levass...@hotmail.com] Sent: Friday, August 13, 1999 3:15 PM To: b...@anritsu.com; emc-p...@ieee.org Subject:Re: EMC test chamber -- Reverberation and Others Thanks Barry for the suggestion but I know nothing about reverberation chambers, possibly somone could comment on the merits of RC over AC. Ray Levasseur EMC Compliance Creo Products From: b...@anritsu.com (Bailin Ma) Reply-To: b...@anritsu.com (Bailin Ma) To: emc-p...@ieee.org Subject: EMC test chamber -- Reverberation and Others Date: Fri, 13 Aug 1999 9:13:21 PDT Ray, Did you consider using Reverberation Chamber (RC) instead of semi-anechoic chamber for pre-compliance? It seems to me that RC technique has become practically applicable for both emission and immunity tests. It's less expensive. Official EMC standards would accept it in a couple of years. IEC 61000-4-21: Reverberation Chamber is circulating for comments. I know little about RC and expect some knowledgeable colleagues to make comments. Barry Ma Anritsu Company -Original Message- From: Ray Levasseur [mailto:ray_levass...@hotmail.com] Sent: Wednesday, August 11, 1999 2:44 PM To: emc-p...@majordomo.ieee.org Subject: Wanted:EMC test chamber Hi Group, I am setting up pre-compliance EMC testing at our facility and need some equipment to complete my setup. I was planning on a 3m shielded room with the possibility of making it semi-anechoic when the budget allows. Our products are large (relative to normal ITE equipment) with the largest that would be tested in the chamber 10ft wide X 6ft long X 3ft high. I have most of the equipment I need to do the tests for EN 55022 and EN 50082. I need a motorized antenna mast that goes from 1-4m and a chamber. If anyone could direct me to a person or company selling the chamber or antenna mast I would greatly appreciate it. Also I would like to get some feedback on the Cassper virtual chamber and if anyone has used it or has comments on the usability of such a system. Thanks, Ray Levasseur EMC Compliance, Creo Products - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). __ Get Your
Re: EMC test chamber -- Reverberation and Others
Leslie, Thanks for the valuable info. You mentioned two articles in EMC'99 Seattle Symposium Record. Actually, right before them on pp. 1-6 of Vol. 1 is Reverberation Chamber Relationship: Corrections and Improvements by John Ladbury and Galen Koepke, which won the award of the best Symposium technical paper at Seattle. Barry Ma Morgan Hill, CA -- Original Text -- From: Leslie Bai leslie_...@yahoo.com, on 8/15/99 7:16 PM: I have studied Reverberation Chambers for some time, refer to recent EMC'99 Seattle Symposium Record Vol. 1, Page 7 to page 16. Measurement comparison will be published in the near future. Cost: RC is about 20 to 30% of an equivalent AC. Standards: There is a joint CISPR (emissions) and IEC (immunity) committee working to produce a common standard for RCs. Immunity standard can be found in IEC 61000-4-3, Anex I. I have no doubt there will eventually be an emissions standard which permits RC use. However, it is unlikely that an operative standard will be available in 2 years. Technology: RC uses statistical analysis to perform EMC measurement. It is realized by changing the boundary conditions using stirring paddle(s). However, the restriction of the Lowest Usable Frequency (LUF) may be a problem which is under study in the community. General comments: If you need to do emission and immunity certification testing in the near term, my recommendation would be for AC. It is the most expensive solution but it is acceptable today and if used properly (i.e., robust, many aspect angle tests) will provide detailed information on EUT characteristics. A RC will be a cost effective approach to a test facility for some test objectives (e.g., identifying emission frequencies very quickly and positively) and in the longer term will be the most cost effective. Rgds, Leslie --- Ray Levasseur ray_levass...@hotmail.com wrote: Thanks Barry for the suggestion but I know nothing about reverberation chambers, possibly somone could comment on the merits of RC over AC. Ray Levasseur EMC Compliance Creo Products From: b...@anritsu.com (Bailin Ma) Reply-To: b...@anritsu.com (Bailin Ma) To: emc-p...@ieee.org Subject: EMC test chamber -- Reverberation and Others Date: Fri, 13 Aug 1999 9:13:21 PDT Ray, Did you consider using Reverberation Chamber (RC) instead of semi-anechoic chamber for pre-compliance? It seems to me that RC technique has become practically applicable for both emission and immunity tests. It's less expensive. Official EMC standards would accept it in a couple of years. IEC 61000-4-21: Reverberation Chamber is circulating for comments. I know little about RC and expect some knowledgeable colleagues to make comments. Barry Ma Anritsu Company -Original Message- From: Ray Levasseur [mailto:ray_levass...@hotmail.com] Sent: Wednesday, August 11, 1999 2:44 PM To: emc-p...@majordomo.ieee.org Subject: Wanted:EMC test chamber Hi Group, I am setting up pre-compliance EMC testing at our facility and need some equipment to complete my setup. I was planning on a 3m shielded room with the possibility of making it semi-anechoic when the budget allows. Our products are large (relative to normal ITE equipment) with the largest that would be tested in the chamber 10ft wide X 6ft long X 3ft high. I have most of the equipment I need to do the tests for EN 55022 and EN 50082. I need a motorized antenna mast that goes from 1-4m and a chamber. If anyone could direct me to a person or company selling the chamber or antenna mast I would greatly appreciate it. Also I would like to get some feedback on the Cassper virtual chamber and if anyone has used it or has comments on the usability of such a system. Thanks, Ray Levasseur EMC Compliance, Creo Products - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). __ Get Your Private, Free Email at http://www.hotmail.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). _ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line
RE: EMC test chamber -- Reverberation and Others
Guys, There was an entire session on Reverberation Chambers in the IEEE EMC Symposium held two weeks ago in Seattle. You might find some good stuff in the papers. If you are a Society member, they produced a CD-ROM of all the papers, which is available for the asking, I'm told. Like you, I am not an expert in Reverb chambers. Jim Dr. Jim Knightene-mail: jim.knigh...@sandiegoca.ncr.com mailto:jim.knigh...@sandiego.ncr.com Senior Consulting Engineer NCR 17095 Via del Campo San Diego, CA 92127 http://www.ncr.com http://www.ncr.com Tel: 858-485-2537 Fax: 858-485-3788 * Notice the Area Code change from 619 * -Original Message- From: Ray Levasseur [mailto:ray_levass...@hotmail.com] Sent: Friday, August 13, 1999 3:15 PM To: b...@anritsu.com; emc-p...@ieee.org Subject:Re: EMC test chamber -- Reverberation and Others Thanks Barry for the suggestion but I know nothing about reverberation chambers, possibly somone could comment on the merits of RC over AC. Ray Levasseur EMC Compliance Creo Products From: b...@anritsu.com (Bailin Ma) Reply-To: b...@anritsu.com (Bailin Ma) To: emc-p...@ieee.org Subject: EMC test chamber -- Reverberation and Others Date: Fri, 13 Aug 1999 9:13:21 PDT Ray, Did you consider using Reverberation Chamber (RC) instead of semi-anechoic chamber for pre-compliance? It seems to me that RC technique has become practically applicable for both emission and immunity tests. It's less expensive. Official EMC standards would accept it in a couple of years. IEC 61000-4-21: Reverberation Chamber is circulating for comments. I know little about RC and expect some knowledgeable colleagues to make comments. Barry Ma Anritsu Company -Original Message- From: Ray Levasseur [mailto:ray_levass...@hotmail.com] Sent: Wednesday, August 11, 1999 2:44 PM To: emc-p...@majordomo.ieee.org Subject: Wanted:EMC test chamber Hi Group, I am setting up pre-compliance EMC testing at our facility and need some equipment to complete my setup. I was planning on a 3m shielded room with the possibility of making it semi-anechoic when the budget allows. Our products are large (relative to normal ITE equipment) with the largest that would be tested in the chamber 10ft wide X 6ft long X 3ft high. I have most of the equipment I need to do the tests for EN 55022 and EN 50082. I need a motorized antenna mast that goes from 1-4m and a chamber. If anyone could direct me to a person or company selling the chamber or antenna mast I would greatly appreciate it. Also I would like to get some feedback on the Cassper virtual chamber and if anyone has used it or has comments on the usability of such a system. Thanks, Ray Levasseur EMC Compliance, Creo Products - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). __ Get Your Private, Free Email at http://www.hotmail.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel
Re: EMC test chamber -- Reverberation and Others
I have studied Reverberation Chambers for some time, refer to recent EMC'99 Seattle Symposium Record Vol. 1, Page 7 to page 16. Measurement comparison will be published in the near future. Cost: RC is about 20 to 30% of an equivalent AC. Standards: There is a joint CISPR (emissions) and IEC (immunity) committee working to produce a common standard for RCs. Immunity standard can be found in IEC 61000-4-3, Anex I. I have no doubt there will eventually be an emissions standard which permits RC use. However, it is unlikely that an operative standard will be available in 2 years. Technology: RC uses statistical analysis to perform EMC measurement. It is realized by changing the boundary conditions using stirring paddle(s). However, the restriction of the Lowest Usable Frequency (LUF) may be a problem which is under study in the community. General comments: If you need to do emission and immunity certification testing in the near term, my recommendation would be for AC. It is the most expensive solution but it is acceptable today and if used properly (i.e., robust, many aspect angle tests) will provide detailed information on EUT characteristics. A RC will be a cost effective approach to a test facility for some test objectives (e.g., identifying emission frequencies very quickly and positively) and in the longer term will be the most cost effective. Rgds, Leslie --- Ray Levasseur ray_levass...@hotmail.com wrote: Thanks Barry for the suggestion but I know nothing about reverberation chambers, possibly somone could comment on the merits of RC over AC. Ray Levasseur EMC Compliance Creo Products From: b...@anritsu.com (Bailin Ma) Reply-To: b...@anritsu.com (Bailin Ma) To: emc-p...@ieee.org Subject: EMC test chamber -- Reverberation and Others Date: Fri, 13 Aug 1999 9:13:21 PDT Ray, Did you consider using Reverberation Chamber (RC) instead of semi-anechoic chamber for pre-compliance? It seems to me that RC technique has become practically applicable for both emission and immunity tests. It's less expensive. Official EMC standards would accept it in a couple of years. IEC 61000-4-21: Reverberation Chamber is circulating for comments. I know little about RC and expect some knowledgeable colleagues to make comments. Barry Ma Anritsu Company -Original Message- From: Ray Levasseur [mailto:ray_levass...@hotmail.com] Sent: Wednesday, August 11, 1999 2:44 PM To: emc-p...@majordomo.ieee.org Subject: Wanted:EMC test chamber Hi Group, I am setting up pre-compliance EMC testing at our facility and need some equipment to complete my setup. I was planning on a 3m shielded room with the possibility of making it semi-anechoic when the budget allows. Our products are large (relative to normal ITE equipment) with the largest that would be tested in the chamber 10ft wide X 6ft long X 3ft high. I have most of the equipment I need to do the tests for EN 55022 and EN 50082. I need a motorized antenna mast that goes from 1-4m and a chamber. If anyone could direct me to a person or company selling the chamber or antenna mast I would greatly appreciate it. Also I would like to get some feedback on the Cassper virtual chamber and if anyone has used it or has comments on the usability of such a system. Thanks, Ray Levasseur EMC Compliance, Creo Products - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). __ Get Your Private, Free Email at http://www.hotmail.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). _ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Re: EMC test chamber -- Reverberation and Others
Thanks Barry for the suggestion but I know nothing about reverberation chambers, possibly somone could comment on the merits of RC over AC. Ray Levasseur EMC Compliance Creo Products From: b...@anritsu.com (Bailin Ma) Reply-To: b...@anritsu.com (Bailin Ma) To: emc-p...@ieee.org Subject: EMC test chamber -- Reverberation and Others Date: Fri, 13 Aug 1999 9:13:21 PDT Ray, Did you consider using Reverberation Chamber (RC) instead of semi-anechoic chamber for pre-compliance? It seems to me that RC technique has become practically applicable for both emission and immunity tests. It's less expensive. Official EMC standards would accept it in a couple of years. IEC 61000-4-21: Reverberation Chamber is circulating for comments. I know little about RC and expect some knowledgeable colleagues to make comments. Barry Ma Anritsu Company -Original Message- From: Ray Levasseur [mailto:ray_levass...@hotmail.com] Sent: Wednesday, August 11, 1999 2:44 PM To: emc-p...@majordomo.ieee.org Subject: Wanted:EMC test chamber Hi Group, I am setting up pre-compliance EMC testing at our facility and need some equipment to complete my setup. I was planning on a 3m shielded room with the possibility of making it semi-anechoic when the budget allows. Our products are large (relative to normal ITE equipment) with the largest that would be tested in the chamber 10ft wide X 6ft long X 3ft high. I have most of the equipment I need to do the tests for EN 55022 and EN 50082. I need a motorized antenna mast that goes from 1-4m and a chamber. If anyone could direct me to a person or company selling the chamber or antenna mast I would greatly appreciate it. Also I would like to get some feedback on the Cassper virtual chamber and if anyone has used it or has comments on the usability of such a system. Thanks, Ray Levasseur EMC Compliance, Creo Products - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). __ Get Your Private, Free Email at http://www.hotmail.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
EMC test chamber -- Reverberation and Others
Ray, Did you consider using Reverberation Chamber (RC) instead of semi-anechoic chamber for pre-compliance? It seems to me that RC technique has become practically applicable for both emission and immunity tests. It's less expensive. Official EMC standards would accept it in a couple of years. IEC 61000-4-21: Reverberation Chamber is circulating for comments. I know little about RC and expect some knowledgeable colleagues to make comments. Barry Ma Anritsu Company -Original Message- From: Ray Levasseur [mailto:ray_levass...@hotmail.com] Sent: Wednesday, August 11, 1999 2:44 PM To: emc-p...@majordomo.ieee.org Subject: Wanted:EMC test chamber Hi Group, I am setting up pre-compliance EMC testing at our facility and need some equipment to complete my setup. I was planning on a 3m shielded room with the possibility of making it semi-anechoic when the budget allows. Our products are large (relative to normal ITE equipment) with the largest that would be tested in the chamber 10ft wide X 6ft long X 3ft high. I have most of the equipment I need to do the tests for EN 55022 and EN 50082. I need a motorized antenna mast that goes from 1-4m and a chamber. If anyone could direct me to a person or company selling the chamber or antenna mast I would greatly appreciate it. Also I would like to get some feedback on the Cassper virtual chamber and if anyone has used it or has comments on the usability of such a system. Thanks, Ray Levasseur EMC Compliance, Creo Products - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
