For EMC if the concern is emissions it would be easy to do some quick scans – 10 minutes on a peak run for each model would give you data to compare against each other to see how much the emissions profile changes due to the modifications. Immunity would take longer but the manufacturer should be able to do an engineering analysis and see what might make sense/
For radios it is significantly different. Certification of a product for FCC only applies to the product in the report and identical models as defined in 2.908. Any modifications require evaluation. Thanks, [cid:image503832.jpg@B3A1BD25.EF509806] David Schaefer Technical Manager Element Materials Technology 9349 W Broadway Ave Brooklyn Park , MN 55445 , United States O +1 612 638 5136<tel:+1%20612%20638%205136> ext. 10461 david.schae...@element.com<mailto:david.schae...@element.com> www.element.com<https://us.content.exclaimer.net/?url=https%3A%2F%2Fwww.element.com%2F&tenantid=ixvYNdAGEeqbBQANOhMLNA&templateid=aabe0990b90beb1196f5000d3a130b34&signature=cZ5egsqVcuTJwdSIK2EbV6p7Tgro9jT7_Tkg-Fb3YiB23cBOgCoUmOEqeUjNn3Wb1utJh_tCAps2nMvNa74FEJYf-WrOczTU6zFlHw54Kkx7YpXyoM-CTV1wYsG6Kp67xdorBRMa5LiebYSyV1KLNeSLvlAMyCdpGXdRt4PdyKih9tRDbM50s0p_22b_gp9LGtkISjiEDnV76ZvXKmVbUxVVd0tqHec9MBwk_T418oc5ZZWOclsIYRqkwfQqf0Wqj5isA4xlnhmt49FZz-5XoxKuiGArsymw_Y4qtO9TEOwjITToveVj6b1_ZkHWiMlIWuUr1cjhpNrAxmzAv6LY8g&v=1&imprintMessageId=eb2a865d-4e9b-467f-aafa-354533b06f38> [cid:image331521.png@1036802E.8DDE4FC3]<https://us.content.exclaimer.net/?url=https%3A%2F%2Ftwitter.com%2FElementTesting%2F&tenantid=ixvYNdAGEeqbBQANOhMLNA&templateid=aabe0990b90beb1196f5000d3a130b34&signature=ACovrZvJeYWsDyyKT0zvYAsZsidrWJylGQABf2bJhKNtCg10KfO2BYNiEUfocR4zw1YzoxFMvQi8ibysZnq3cNZQ2enJrElHRFhuRkcKd45P1AH6s8ee-4IsaM0qk_DybvwO5i12-_P_XaBFh2_9xOmCWZdsBiX-t_6d3mt1nvVR8gKtz-8s3FLwTT0uFlbk4MqGLEBOJRREfG_ZRdBPMRb4PKgkhNDQ4QWsEBPZxwChBoMJQyoQTTD6h1cgGbuyr7tQO6Qs9Y36o1lT7tgQY1FpJ7t8IzelvDE7pnzJ7HW6Izwq6FoBil54k2vQh9lhHva6dgfz_zh9TdhlHUeFOw&v=1&imprintMessageId=eb2a865d-4e9b-467f-aafa-354533b06f38> [cid:image131821.png@E1E2F21A.B7D288C3]<https://us.content.exclaimer.net/?url=https%3A%2F%2Fwww.instagram.com%2Felementtesting%2F&tenantid=ixvYNdAGEeqbBQANOhMLNA&templateid=aabe0990b90beb1196f5000d3a130b34&signature=JFA_C5bAd9pBZiZaSwZX__vhNs-S3M7YTVfi09pIXK1gAXP45i_59EBt5lobzjQ9vJpXmcA6Culn3ScJ4KoeJDH_KArSoBjG1D9DgSV9uBjiqtoY_R0pRy2C2xdzJJzE23qcW1VbyOPH5oED5R5Lw4293PVxGh8b8iVg5ucDVDD7Wv1qQ397usbAsSnLgtNiNRdYaUcd117IEi8S1tvs_yBmd5EfMYwWk3mRXndcszbDP4fNvqHXqAjwMjzPWfEiCBLm5q16NTaxc6zYjxG7fKDkoKqsDx9IceOzpt4VP1AaVUISQ4pP01qjUK926Mb3n4aIBXlPNdNFtQdU02BIgw&v=1&imprintMessageId=eb2a865d-4e9b-467f-aafa-354533b06f38> [cid:image386740.png@C45961D1.A9A92D34]<https://us.content.exclaimer.net/?url=https%3A%2F%2Fwww.youtube.com%2Fc%2FElementTesting&tenantid=ixvYNdAGEeqbBQANOhMLNA&templateid=aabe0990b90beb1196f5000d3a130b34&signature=qgxe1vvCl-XANIN26LoMZ_puPisQ0Ly4xaIIvKvXNru81qXWfAY10HToiRKguS1vq7Oe9AiAIdiBZcovvx21mZntAAB0D8YKytpGwpv6HOVPlgZoIbzqF7yEdQ6V0cAOwsOVs3J5x0c5gfmvTx4E8aLO9TvJhoWWIQh82YXZ6vCKjz-It2yKE-XH6SqslPD6z-iSnTs-HuXk_gJtocOYc_yM6WKneytw_rVHBDUb67WqJjL2odhj0ek81gYcpkFqVwDLe0rdd3Z0JoXAPTTL_vaXpvTY-05zuaJLLYk1ua078uotTVIGVehAlOk7W2Ar87HCPppCLb7CTEOTV03w4w&v=1&imprintMessageId=eb2a865d-4e9b-467f-aafa-354533b06f38> [cid:image030442.jpg@E0856E40.335029BE]<https://us.content.exclaimer.net/?url=https%3A%2F%2Felementmaterials.eu.qualtrics.com%2Fjfe%2Fform%2FSV_3xQqm84s6IydI5D&tenantid=ixvYNdAGEeqbBQANOhMLNA&templateid=aabe0990b90beb1196f5000d3a130b34&excomponentid=gmElYo7_s0JlFVGqteg4_kVfS3mYohjNqcGed925oc0&signature=U30r4FjO4qAnGLGxEYgrVj4Bg00SfIoY7ZRWmxKo0ae23QULQXwlyH7LsE723cGyQFQJrHJoE9nntmtc2Usy7WtguFAaA-2gYihpbfWltpcVhYVU_ZmJiDoHoCdgRsYnGGeL6j3V1uy8yBRfoFSB7QuOQqyuO6ERPvQyVD9zxvdGysyomtbORGLA_-ZAFr7IH04hCWr7XW5pwGx5nyXCKnGBA0kRcXNs6cWRfNDuxBDBUR2lTIDk8bZjewd-rTD9-cdSCAc1nWwUE3VgJyDDavNRrHlfu6w7lAFI_ralJkrvlDa8pGw8MFsb9Jro551bcafyklUNZ2S7DJltelheAQ&v=1&imprintMessageId=eb2a865d-4e9b-467f-aafa-354533b06f38> From: John Woodgate [mailto:j...@woodjohn.uk] Sent: Saturday, April 6, 2024 3:00 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] I would like to hear your thoughts please CAUTION:This email originated from outside of Element Materials Technology. DO NOT click links or open attachments unless you recognize the sender and know the content is safe. Please contact the TOC if you are in any doubt about this email. I agree: pre-scan is the way to go. Document all of the steps so that you can produce your reasons for your decision if challenged. On 2024-04-06 00:05, Brent DeWitt wrote: Tough one! The problem lies in the determination of "worst case". While it would be easy to presume that having all of the hardware populated is worst case, it overlooks the effects of un-terminated stubs and other SI related issues. In addition, with the world of firmware based PLL clocks and memory traffic, it is a tough thing to determine. My opinion would be to preform the simplest pre-scan on each configuration and base the final, rigorous certification based on that knowledge. Brent Dewitt Milford, MA On 4/5/2024 6:47 PM, Lfresearch wrote: Hi folks, I would like to advise a client at where to draw the line on what needs testing. I would like to solicit opinions besides my own. Otherwise it’s the fox urging the chicken coop… So a manufacturer that makes a product of which there will be several variants. All use the same board, but have different sections of circuits populated. This may require slightly different code to run on the same uP in each case. So.. The burning question is can we perform and analysis that postulates a worse case hardware/software combination and test just one configuration? Or, do we have to do every combination? Or, are there some guidelines about where we draw the line of what to test and what can be claimed as similarity? Off list responses are welcome too. Thanks, Derek Walton LFResearch/SSCLabs. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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