Pub Date : 1989-05-23DOI: 10.1109/NSEMC.1989.37216
H. Garn
A technique is presented for radiated-emission tests in completely absorber-lined chambers which are equipped with floor absorbers instead of groundplanes. Data measured in a completely absorber-lined chamber can be converted to open-site equivalents with an accuracy of +or-0.5 dB (30-1000 MHz) by applying the conversion factors given. The great advantage of this technique is that tests are performed with fixed position of the receiving antenna. There is no need for the time-consuming height scan, which is a major source of errors in tests performed in semianechoic chambers.<>
提出了一种采用地板吸波器代替地平面的全衬里室辐射发射试验技术。通过应用给定的转换因子，在完全吸收器衬里的腔室中测量的数据可以转换为开放位置的等效数据，精度为+或0.5 dB (30-1000 MHz)。该技术的最大优点是可以在固定的接收天线位置上进行测试。不需要耗时的高度扫描，这是在半消声室中进行测试的主要误差来源。
{"title":"Radiated emission measurements in completely absorber-lined anechoic chambers without groundplanes","authors":"H. Garn","doi":"10.1109/NSEMC.1989.37216","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37216","url":null,"abstract":"A technique is presented for radiated-emission tests in completely absorber-lined chambers which are equipped with floor absorbers instead of groundplanes. Data measured in a completely absorber-lined chamber can be converted to open-site equivalents with an accuracy of +or-0.5 dB (30-1000 MHz) by applying the conversion factors given. The great advantage of this technique is that tests are performed with fixed position of the receiving antenna. There is no need for the time-consuming height scan, which is a major source of errors in tests performed in semianechoic chambers.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122271152","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}
Pub Date : 1989-05-23DOI: 10.1109/NSEMC.1989.37207
T. Hubing
The effects of using uncontrolled or undefined cable terminations during electromagnetic interference (EMI) measurements was investigated. Several different models are described along with corresponding measurements in order to illustrate how specific terminations can be used to achieve particular measurement goals. It is noted that until a well-defined method of terminating power and signal cables is introduced, the best the EMI test engineer can do is to be aware of the significance of common-mode terminations and try to avoid situations where the common-mode termination impedance is completely undefined or not repeatable.<>
{"title":"The effect of cable terminations on EMI measurements","authors":"T. Hubing","doi":"10.1109/NSEMC.1989.37207","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37207","url":null,"abstract":"The effects of using uncontrolled or undefined cable terminations during electromagnetic interference (EMI) measurements was investigated. Several different models are described along with corresponding measurements in order to illustrate how specific terminations can be used to achieve particular measurement goals. It is noted that until a well-defined method of terminating power and signal cables is introduced, the best the EMI test engineer can do is to be aware of the significance of common-mode terminations and try to avoid situations where the common-mode termination impedance is completely undefined or not repeatable.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133140428","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}
Pub Date : 1900-01-01DOI: 10.1109/NSEMC.1989.37201
H. Zeng
A method is presented for taking the changing time-domain curve for a current or voltage and comparing it with the time-domain impedance curve to assess electromagnetic compatibility between electrical equipment and networks. The method is suitable for use even when the harmonic source and/or impedance of the network is unstable. An example of its application to study a hoisting machine in a colliery is given.<>
{"title":"Taking the way of measuring the features of disturbance in time domain to analyze electromagnetic compatibility between electrical equipment including network","authors":"H. Zeng","doi":"10.1109/NSEMC.1989.37201","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37201","url":null,"abstract":"A method is presented for taking the changing time-domain curve for a current or voltage and comparing it with the time-domain impedance curve to assess electromagnetic compatibility between electrical equipment and networks. The method is suitable for use even when the harmonic source and/or impedance of the network is unstable. An example of its application to study a hoisting machine in a colliery is given.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115545727","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}
Pub Date : 1900-01-01DOI: 10.1109/NSEMC.1989.37144
R.P. Trefney
A brief description is given of a device that provides a self-contained battery operated integral reference source and radiator system that is temperature-compensated and portable. The usable frequency range is from 30 MHz to 1 GHz. The antenna system is capable of generating 100-dB mu V plus levels with a repeatability within +or-0.5 dB. The device described meets all of the criteria of independence from cable and antenna effects because it is self-contained and portable for site correlation or verification.<>
简要描述了一种装置，该装置提供了一个独立的电池操作的整体参考源和散热器系统，该系统是温度补偿和便携式的。可用频率范围为30mhz ~ 1ghz。天线系统能够产生100 dB μ V +电平，可重复性在+或0.5 dB内。所描述的设备符合所有独立于电缆和天线影响的标准，因为它是独立的，便于现场关联或验证。
{"title":"Self-contained calibration antenna","authors":"R.P. Trefney","doi":"10.1109/NSEMC.1989.37144","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37144","url":null,"abstract":"A brief description is given of a device that provides a self-contained battery operated integral reference source and radiator system that is temperature-compensated and portable. The usable frequency range is from 30 MHz to 1 GHz. The antenna system is capable of generating 100-dB mu V plus levels with a repeatability within +or-0.5 dB. The device described meets all of the criteria of independence from cable and antenna effects because it is self-contained and portable for site correlation or verification.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132967928","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}
Pub Date : 1900-01-01DOI: 10.1109/NSEMC.1989.37220
H. Kohlbacher
The need to conduct realistic, efficient EMC system tests on large command, control, communications, and intelligence (C/sup 3/I) systems has led to the development of a stress loading facility (SLF) by the US Army Electronic Proving Ground at Fort Huachuca, Arizona. The SLF is a low-power, radio-frequency (RF), hardware simulation facility for testing the response of electronic equipment to realistic densities of RF signals, while simultaneously monitoring key system under test (SUT) performance parameters. The SLF generates a simulated RF environment based on a time-event scenario that is developed during the pretest period. The RF environment also includes the associated modulations and types of information that would be transmitted by this RF environment. The system, function, and components that are associated with the SUT to allow it to operate realistically and are not physically available for the test are simulated within the SLF. The facility is used to evaluate message traffic and electromagnetic stress. Environmental and mechanical stresses are not considered.<>
{"title":"Stress loading test facility","authors":"H. Kohlbacher","doi":"10.1109/NSEMC.1989.37220","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37220","url":null,"abstract":"The need to conduct realistic, efficient EMC system tests on large command, control, communications, and intelligence (C/sup 3/I) systems has led to the development of a stress loading facility (SLF) by the US Army Electronic Proving Ground at Fort Huachuca, Arizona. The SLF is a low-power, radio-frequency (RF), hardware simulation facility for testing the response of electronic equipment to realistic densities of RF signals, while simultaneously monitoring key system under test (SUT) performance parameters. The SLF generates a simulated RF environment based on a time-event scenario that is developed during the pretest period. The RF environment also includes the associated modulations and types of information that would be transmitted by this RF environment. The system, function, and components that are associated with the SUT to allow it to operate realistically and are not physically available for the test are simulated within the SLF. The facility is used to evaluate message traffic and electromagnetic stress. Environmental and mechanical stresses are not considered.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115679333","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}
Pub Date : 1900-01-01DOI: 10.1109/NSEMC.1989.37203
H. Zeng
When the harmonic current of nonlinear electric equipment is injected into a network, a disturbance is formed. According to the IEC/TC-77(EMC) and other standards for power systems and plants, the disturbance's degree can be expressed by the network harmonic voltage, resulting from the harmonic current injected into the network from electric equipment. It can also be expressed by U/sub n//U/sub 1/, the ratio of the Nth harmonic voltage (RMS). This is also called the sine wave distortion factor of the Nth harmonic voltage, designated DF/sub n/%. A different coefficient ZF/sub n/ is proposed that is the ratio of the harmonic voltage of the network bus (RMS) to the harmonic current injected into the network system. An example of its application is presented. It is claimed that compared to the general voltage distortion factor DF/sub n/%, ZF/sub n/ can show electromagnetic compatibility more clearly.<>
{"title":"The feature of harmonic in time domain and the harmonic impedance coefficient ZFn of network","authors":"H. Zeng","doi":"10.1109/NSEMC.1989.37203","DOIUrl":"https://doi.org/10.1109/NSEMC.1989.37203","url":null,"abstract":"When the harmonic current of nonlinear electric equipment is injected into a network, a disturbance is formed. According to the IEC/TC-77(EMC) and other standards for power systems and plants, the disturbance's degree can be expressed by the network harmonic voltage, resulting from the harmonic current injected into the network from electric equipment. It can also be expressed by U/sub n//U/sub 1/, the ratio of the Nth harmonic voltage (RMS). This is also called the sine wave distortion factor of the Nth harmonic voltage, designated DF/sub n/%. A different coefficient ZF/sub n/ is proposed that is the ratio of the harmonic voltage of the network bus (RMS) to the harmonic current injected into the network system. An example of its application is presented. It is claimed that compared to the general voltage distortion factor DF/sub n/%, ZF/sub n/ can show electromagnetic compatibility more clearly.<<ETX>>","PeriodicalId":408694,"journal":{"name":"National Symposium on Electromagnetic Compatibility","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122202366","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}
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