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IEEE 1991 International Symposium on Electromagnetic Compatibility最新文献

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Experimental pretest survey-a new technique for determining EMP/lightning test points 实验预测法——确定电磁脉冲/雷电测点的新技术
IEEE 1991 International Symposium on Electromagnetic Compatibility Pub Date : 1991-08-12 DOI: 10.1109/ISEMC.1991.148201
L. Hoeft, J. Hofstra, R. Karaskiewicz, W.H. Cordova, W. Prather
{"title":"Experimental pretest survey-a new technique for determining EMP/lightning test points","authors":"L. Hoeft, J. Hofstra, R. Karaskiewicz, W.H. Cordova, W. Prather","doi":"10.1109/ISEMC.1991.148201","DOIUrl":"https://doi.org/10.1109/ISEMC.1991.148201","url":null,"abstract":"Experimental pretest survey uses a short, simple, preliminary measurement program to find and characterize the significant points of entry and coupling paths through the shielding topology surfaces to obtain an initial estimate of the upset threshold distribution. Shielding topology is characterized at one or a few frequencies using continuous wave (CW) excitation and simple measurement apparatus. The random repetitive square-wave pulse generator (R/sup 2/SPG) technique is used to obtain an initial upset threshold distribution. It is shown how several techniques, such as single point excitation for hardness surveillance (SPEHS), hardness surveillance illuminator (HSI) and R/sup 2/SPG, can be used to guide the test planner towards a successful test. By investing a few days in an experimental pretest survey, the test planner gets a set of transfer functions that allows test points to be selected and prioritized with increased confidence.<<ETX>>","PeriodicalId":243730,"journal":{"name":"IEEE 1991 International Symposium on Electromagnetic Compatibility","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114614849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Video signal analysis for EMI control 电磁干扰控制中的视频信号分析
IEEE 1991 International Symposium on Electromagnetic Compatibility Pub Date : 1991-08-12 DOI: 10.1109/ISEMC.1991.148265
R. Hill
{"title":"Video signal analysis for EMI control","authors":"R. Hill","doi":"10.1109/ISEMC.1991.148265","DOIUrl":"https://doi.org/10.1109/ISEMC.1991.148265","url":null,"abstract":"High-performance, high-resolution graphics are becoming common in low-cost workstation and personal computer products. The electromagnetic compatibility (EMC) engineer responsible for design consultation on such systems must be able to analyze high-speed video signals to minimize excessive electromagnetic interference (EMI) generation while preserving >100 MHz signal bandwidth. All introduction to high-speed video signaling, and time and frequency domain analysis techniques are presented. Production quality video controllers are analyzed and compared using the described analysis techniques.<<ETX>>","PeriodicalId":243730,"journal":{"name":"IEEE 1991 International Symposium on Electromagnetic Compatibility","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122096000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Receiver conducted susceptibility testing of spread 2 spectrum systems 接收方对扩频系统进行了敏感性测试
IEEE 1991 International Symposium on Electromagnetic Compatibility Pub Date : 1991-08-12 DOI: 10.1109/ISEMC.1991.148208
J. A. Calabria, M. Massaro
{"title":"Receiver conducted susceptibility testing of spread 2 spectrum systems","authors":"J. A. Calabria, M. Massaro","doi":"10.1109/ISEMC.1991.148208","DOIUrl":"https://doi.org/10.1109/ISEMC.1991.148208","url":null,"abstract":"Modern communication and navigation devices utilize spread spectrum technology to provide optimal use of the allocated RF spectrum and to minimize the effects of intentional interference and unintentional RF noise. The four most common spread spectrum techniques are briefly reviewed. Modern military communications equipment utilizes one or more of these techniques for signal transmission, while commercial applications are nearing completion for cellular telephones and direct broadcast satellite (DBS) applications. For the EMC engineer, the question of receiver performance is measured by testing to MIL-STD-461/462: test method CS03-intermodulation; CS04-rejection of undesired signal; and CS05-cross-modulation. Each of these tests are performed in the out-of-band RF spectrum and should not be confused with RF jamming tests that are performed in-band. Several approaches are discussed: the full test solution, the test and analysis solution, and the limited test solution.<<ETX>>","PeriodicalId":243730,"journal":{"name":"IEEE 1991 International Symposium on Electromagnetic Compatibility","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123483571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Preliminary survey of the electromagnetic interference environment in hospitals 医院电磁干扰环境初步调查
IEEE 1991 International Symposium on Electromagnetic Compatibility Pub Date : 1991-08-12 DOI: 10.1109/ISEMC.1991.148219
P. Boisvert, B. Segal, T. Pavlasek, S. Rétfalvi, A. Sebe, P. Caron
{"title":"Preliminary survey of the electromagnetic interference environment in hospitals","authors":"P. Boisvert, B. Segal, T. Pavlasek, S. Rétfalvi, A. Sebe, P. Caron","doi":"10.1109/ISEMC.1991.148219","DOIUrl":"https://doi.org/10.1109/ISEMC.1991.148219","url":null,"abstract":"Electric field levels were predicted using a free-space propagation model, and then measured in three major hospitals in downtown Montreal. The measurements were performed using industry-standard techniques and novel broadband, omnidirectional, triaxial, electrically small (BOTES) techniques. Although the absolute values of predictions were often unreliable, they acceptably predicted the type of electromagnetic environment observed at different hospitals. Results from both sets of measurements were closely related, suggesting continued future development of lower-cost BOTES measurement techniques. None of the fields encountered were above the limit prescribed by the Food and Drug Administration (FDA) susceptibility standard for medical devices. Correlations of survey results and of previous reports of device malfunctions in the rooms surveyed suggest that the FDA standard should be mandatory rather than voluntary.<<ETX>>","PeriodicalId":243730,"journal":{"name":"IEEE 1991 International Symposium on Electromagnetic Compatibility","volume":"10 47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126840113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
A model to predict radiated emissions from electronic circuits 一种预测电子电路辐射发射的模型
IEEE 1991 International Symposium on Electromagnetic Compatibility Pub Date : 1991-08-12 DOI: 10.1109/ISEMC.1991.148183
M. Radojicic, G. Costache
{"title":"A model to predict radiated emissions from electronic circuits","authors":"M. Radojicic, G. Costache","doi":"10.1109/ISEMC.1991.148183","DOIUrl":"https://doi.org/10.1109/ISEMC.1991.148183","url":null,"abstract":"Radiated electric field from simple models of printed circuit boards is predicted using a ground impedance formulation model. Results from this model show that a good agreement is found, but in a much faster time than a common method of moments program. Suggestions are made on how to reduce the radiated emissions.<<ETX>>","PeriodicalId":243730,"journal":{"name":"IEEE 1991 International Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125141763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Effect of charge, feed, and test cable lengths on R/sup 2/SPG waveforms 充电、馈电和测试电缆长度对R/sup 2/SPG波形的影响
IEEE 1991 International Symposium on Electromagnetic Compatibility Pub Date : 1991-08-12 DOI: 10.1109/ISEMC.1991.148176
L. Hoeft, R.J. Karaskiewicz, J. Hofstra, W. Prather, W. R. Ayres
{"title":"Effect of charge, feed, and test cable lengths on R/sup 2/SPG waveforms","authors":"L. Hoeft, R.J. Karaskiewicz, J. Hofstra, W. Prather, W. R. Ayres","doi":"10.1109/ISEMC.1991.148176","DOIUrl":"https://doi.org/10.1109/ISEMC.1991.148176","url":null,"abstract":"The random repetitive squarewave pulse generator (R/sup 2/SPG) was developed for in situ upset testing of cable connected equipment. This pulser uses a charge line and a vacuum switch to produce a broadband transient that approximates a damped squarewave with a risetime of the order of a few nanoseconds, determined by the impedance discontinuities of the switch, and a ringing frequency that is related to the electrical length of the charge and feed lines. In order to better understand the relationships between the lengths of the charge, feed, and test cables, a controlled experiment was performed that varied each of these independently. The currents induced on the test cable were consistent with a simple transmission line model. The ringing frequency of the pulser, determined by the electrical length of the charge and feed lines, was generally discernible, as was the resonant frequency of the test cable. The peak amplitude of the transient and the decay rate of the pulse spectrum were unaffected by changes in the charge and feed lines.<<ETX>>","PeriodicalId":243730,"journal":{"name":"IEEE 1991 International Symposium on Electromagnetic Compatibility","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134044075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Comparative overview of proposed ANSI ESD guide, IEC and CISPR ESD standards 拟议的ANSI ESD指南，IEC和CISPR ESD标准的比较概述
IEEE 1991 International Symposium on Electromagnetic Compatibility Pub Date : 1991-08-12 DOI: 10.1109/ISEMC.1991.148251
W. Rhoades, D. Staggs, D. Pratt
{"title":"Comparative overview of proposed ANSI ESD guide, IEC and CISPR ESD standards","authors":"W. Rhoades, D. Staggs, D. Pratt","doi":"10.1109/ISEMC.1991.148251","DOIUrl":"https://doi.org/10.1109/ISEMC.1991.148251","url":null,"abstract":"The American National Standards Institute (ANSI) is creating a document which provides guidance on electrostatic discharge (ESD) testing procedures for electronic equipment using air discharge and contact discharge methodologies. As much as possible, parts of published and draft ESD standards, such as definitions, target, table-top heights, etc., have been incorporated into the ANSI document. The ANSI guide contains material that has been ignored by other ESD standards committees. The ANSI committee feels strongly that this material is needed to complete the goals of any ESD testing. The primary goal is to insure the quality of products through proper operation in actual use environments. The second goal is to have a realistic, workable, and very repeatable ESD testing procedure. The material that should be covered in any ESD standard is detailed.<<ETX>>","PeriodicalId":243730,"journal":{"name":"IEEE 1991 International Symposium on Electromagnetic Compatibility","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133089684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Video subsystem design for EMI control 用于电磁干扰控制的视频分系统设计
IEEE 1991 International Symposium on Electromagnetic Compatibility Pub Date : 1991-08-12 DOI: 10.1109/ISEMC.1991.148200
R. Hill, A. Metsler
{"title":"Video subsystem design for EMI control","authors":"R. Hill, A. Metsler","doi":"10.1109/ISEMC.1991.148200","DOIUrl":"https://doi.org/10.1109/ISEMC.1991.148200","url":null,"abstract":"Low-cost high-speed video controllers and compatible displays are becoming commonplace in the PC and workstation market. The video subsystem is defined as the video controller, analog output path, interconnecting cable, and common CRT-based display. The function and fundamental electromagnetic interference (EMI) design criteria of each are discussed. The interaction of all three makes it difficult to associate video-related EMI problems with one element. Simple models and analysis techniques are discussed to verify performance of each element, while also providing a unique means to positively identify individual EMI sources in a system under test.<<ETX>>","PeriodicalId":243730,"journal":{"name":"IEEE 1991 International Symposium on Electromagnetic Compatibility","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115394174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Radio frequency attenuation of saline solutions 盐水溶液的射频衰减
IEEE 1991 International Symposium on Electromagnetic Compatibility Pub Date : 1991-08-12 DOI: 10.1109/ISEMC.1991.148209
P. Cook
{"title":"Radio frequency attenuation of saline solutions","authors":"P. Cook","doi":"10.1109/ISEMC.1991.148209","DOIUrl":"https://doi.org/10.1109/ISEMC.1991.148209","url":null,"abstract":"Radio frequency (RF) susceptibility tests on pacemakers are frequently performed with the pacemakers in a saline solution. The attenuation provided by three different saline concentrations over the frequency range of 30-800 MHz is investigated. During these investigations it was found that 10 cm of saline provides anywhere from 0 to 19 dB of attenuation depending on the frequency and saline concentration.<<ETX>>","PeriodicalId":243730,"journal":{"name":"IEEE 1991 International Symposium on Electromagnetic Compatibility","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124263735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Time domain characteristics of RF environments 射频环境的时域特性
IEEE 1991 International Symposium on Electromagnetic Compatibility Pub Date : 1991-08-12 DOI: 10.1109/ISEMC.1991.148217
M.-C. Li, G.T. Roan
{"title":"Time domain characteristics of RF environments","authors":"M.-C. Li, G.T. Roan","doi":"10.1109/ISEMC.1991.148217","DOIUrl":"https://doi.org/10.1109/ISEMC.1991.148217","url":null,"abstract":"Radio frequency (RF) environments have conventionally been characterized by frequency domain techniques. The presentation given takes a different approach and discusses time domain methods and various associated features of interest. It has been observed that these methods are useful not only for the simplicity with which they can characterize RF environments, but also for their application in electromagnetic compatibility testing.<<ETX>>","PeriodicalId":243730,"journal":{"name":"IEEE 1991 International Symposium on Electromagnetic Compatibility","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121214582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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