Rocky Mountain Chapter EMC Society |
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Our last meeting was a doubleheader.. 1.PCB EMISSIONS SCANNING PRESENTATION Download
the presentation here Presenter: Tony O'Hara - Lartec Marketing What we saw: A demonstration of the Emscan printed circuit board emissions measurement system..The presentation will introduced and demo the EMSCAN system, which uses an array of switched H-Field probes that allows close to real time spatial RF scans on PCB's. For more information goto the EMScan Webpage. 2. Identifying ( and then avoiding) Errors in Signal Integrity Measurements. Presenter: Dr Karl J. Bois - Hewlett Packard. What we saw: : This talk was part tutorial and part Q & A. Dr Bois kicked off the tutorial portion of the meeting by reviewing some electronic history. The recent explosion in the internet and high-speed signalling in particular means that the accurate characterization of signal path is now of very high concern to engineers. Traditionally the transmission line was short enough that lumped parameters were models could be used with a high degree of accuracy. Some typical transmission line structures were shown with their associated models. Problems concerning convergece issues were also discussed and S-parameters introduced. After an all too short introduction into S-parameters, Dr. Bois then displayed some typical s-parameter responses for well matched and poorly matched transmission lines - providing us with a sneak peak to the next portion of the talk. The VNA (Vector Network Analyzer). Dr. Bois then lifted the hood and gave us a peek into the internal fuctions of the VNA. A great deal of time was then spent discussing and examining the central issue - the calibration of the VNA. Date : Feb 27 2001 Location: National Institute for Standards and Technology (NIST) in Boulder Co. (Directions) Room 1107 Times: 6:30-7:00 EMScan Demo 7:00-8:30 Main Presentation Pictures from our February meeting
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