Hi All, I have fine tuned my content and outline of a web presentation on troubleshooting EMC issues, and even SI issues, by addressing resonances in the physical structure of a system. Many if not most EMC and some SI problems, in my experience, are the result of resonances. I am thinking of holding this as a web presentation on a regular basis (say on Friday afternoons) in addition to private presentations for my customers (one on those coming up with 30+ people around the world attending). If you are interested in participating, contact me privately. There is a cost (~tens of $ depending on number attending) but it is a small fraction of what web based classes of this length (one to two hours) usually cost. Here is the outline: Electrical Resonances in Physical Structures (A New Approach to Solving EMC Emissions and Immunity Problems) Many system design problems result from electrical resonances in the physical structures of the system, such as PCB construction and mounting, heat sink construction and mounting, chassis construction, unintended resonances of system antennas, and system cables both internal and external. If these problems are thought of in terms of resonances (LC and transmission lines), the problems are often more easily found and solved. Techniques for finding, characterizing, determining if a specific resonance is a problem or is harmless, and fixing those resonances that are causing problems are presented. Outline 1. How to measure resonances ◦ Direct measurements ◦ Measurements using probes 2. Examples of measurements and implications ◦ PCB plane resonance ◦ Simple BNC connector ◦ PCB mounted over metal/another board ⁃ Time domain ⁃ Frequency domain ◦ Chassis resonance and ESD performance ◦ RFID antenna (~10 MHz) spurious resonances @200 MHz and emissions ◦ Resonance on a PCB path on development PCB ◦ Heat sink resonance - EMC examples ◦ Resonance in a system cable 3. Methods to kill the Q of resonances 4. Effect of system resonances on emissions and radiated immunity 5. Effect of system resonances on ESD performance 6. Testing resonances to see if they are a problem 7. Equipment recommendations 8. Summary -- -------------------------------------------------------------- ___ _ Doug Smith \ / ) P.O. Box 60941 ========= Boulder City, NV 89006-0941 _ / \ / \ _ TEL/FAX: 702-570-6108/570-6013 / /\ \ ] / /\ \ Mobile: 408-858-4528 | q-----( ) | o | Email: doug@xxxxxxxxxx \ _ / ] \ _ / Web: http://www.dsmith.org -------------------------------------------------------------- ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu