Hi! This indeed can be confusing. I hope this helps: 1: The Edition 5.2 is the latest, so you have the correct document. Teseq and Fischer ISN's for UTP cables are like this. The one which refers to A/307 is according to older version of CISPR 22 (different LCL figures) and you should forget that one. 2: In that case you should use ISN for unshielded 4-pair cable. 3: You test with the cable manufacturer provides with the EUT. Regards, Ari Honkala
_____ From: [email protected] [mailto:[email protected]] On Behalf Of ext Grace Lin Sent: 2. tammikuuta 2008 19:15 To: [email protected] Subject: ISN Dear Members, Happy New Year. Please help me to determine the specifications/models for an ISN (per CISPR 22) to purchase. My questions are: 1. Is there a particular edition of the CISPR 22 that I have to refer to when looking for an ISN? My EN 55022: 2006 copy includes the Edition 5.2 of CISPR 22. I believe this is the latest version of the CISPR 22 standard. Three ISN manufacturers are found from the "EMCTLA Technical Guidance Note #42 Addendum 1" ( <http://www.emctla.co.uk/TechGuideNotes/TGN42.pdf> http://www.emctla.co.uk/TechGuideNotes/TGN42.pdf). One manufacturer claims its ISN complies with CISPR/A/307/CD. One manufacturer claims its ISN meets the requirements for LCL defined in CISPR 22, Ed. 5, 2005 ( http://www.fischercc.com/PDFs/TILISN-T8-02-(RevC-0608DS).pdf). The other manufacturer claims its ISN meets the requirements of CISPR 22, Ed 5.2 ( <http://www.teseq.com/com/en/news_events/news/2007_07_01_isnt8.php> http://www.teseq.com/com/en/products_so utions/emc_radio_frequency/impedance_stabilisation_networks_isn/ISN_ST08_e.pdf ). 2. For a product with a shielded RJ45 port, if a manufacturer does not specify the type of cable (shielded vs unshielded) and does not provide a cable, should an ISN for shielded pair (for example http://www.teseq.com/com/en/products_so utions/emc_radio_frequency/impedance_stabilisation_networks_isn/ISN_ST08_e.pdf <http://www.teseq.com/com/en/products_ olutions/emc_radio_frequency/impedance_ tabilisation_networks_isn/ISN_ST08_e.pdf> ) or unshielded pair (for example http://www.teseq.com/com/en/products_so utions/emc_radio_frequency/impedance_stabilisation_networks_isn/ISN_T8_e.pdf <http://www.teseq.com/com/en/products_s lutions/emc_radio_frequency/impedance_stabilisation_networks_isn/ISN_T8_e.pdf> ) <http://www.teseq.com/com/en/news_events/news/2007_07_01_isnt8.php> be used? 3. From Item 2, if a manufacturer provides unshielded cable (or have an option for purchaseing cables), should an ISN fro shielded or unshielded pair be used? Thank you very much for your time and look forward to your help. Best regards, Grace Lin - ---------------------------------------------------------------- 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
