![]() ![]() ![]() Using combinations of standard test procedures adapted for the clinical environment with personnel that have an understanding of radio-frequency behavior increases the probability of controlling, proactively, EMI in the clinical environment, thus providing for a safe and more effective patient care environment.Įlectromagnetic Compatibility ( EMC) in Microelectronics.įault Tree Analysis", System Saftey Symposium, June 8-9, 1965, Seattle: The Boeing Company. ![]() Isolating and analyzing the impact from the sources of interference to medical devices involves a multidisciplinary approach based on training in, and knowledge of, the following: operation of medical devices and their susceptibility to EMI RF propagation modalities and interaction theory spectrum analysis systems and techniques (preferably with signature analysis capabilities) and calibrated antennas the investigation methodology of suspected EMC problems, and testing protocols and standards. In the clinical environment, various radio-frequency (RF) sources of electromagnetic interference (EMI) may be present throughout the entire spectrum of interest. Testing for electromagnetic compatibility ( EMC) in the clinical environment introduces a host of complex conditions not normally encountered under laboratory conditions. Testing for EMC ( electromagnetic compatibility) in the clinical environment. It is further recommended that future EMC assessment methodologies be developed around expert systems (i.e., computer intelligent agents) to control both the excruciating detail and user requirement for transparency. It is recommended that a similar EMC assessment methodology be developed for the power subsystem within C3I aircraft. The resulting final assessment methodology is documented in this report in conjunction with the overall study goals, procedures, and database. Application of the preliminary assessment methodology to modifications in the E-3A database served to fine tune the form of a final assessment methodology. Mock modifications were performed on the E-3A database to assess, using a preliminary form of the methodology, the resulting EMC impact. An IEMCAP (Intrasystem Electromagnetic Compatibility Analysis Program) database for the E-3A (AWACS) C3I aircraft RF subsystem was extracted to support the design of the EMC assessment methodology (Volume 2). Software flexibility permits variation in the tests procedure, the ability to examine more closely those frequency bands which indicate compatibility problems, and the capability to incorporate additional test procedures.Ĭ3I system modification and EMC ( electromagnetic compatibility) methodology, volume 1Ī methodology (i.e., consistent set of procedures) for assessing the electromagnetic compatibility ( EMC) of RF subsystem modifications on C3I aircraft was generated during this study (Volume 1). Provisions for disk storage of test data permit computer production of the test engineer's certification report. ![]() Near real-time data reduction and onboard graphics capabilities permit immediate assessment of test results. Software was developed to integrate all testing by means of a desk-top computer-controller. Prior to this project, some EMC tests were partially automated, but others were performed manually. The present facility is used to accomplish a battery of nine standard tests (with limited variations) deigned to certify EMC of Shuttle payload equipment. The suggested statistical evaluation methodology can be utilized to correlate the results of different EMC test techniques, characterize the EMC performance of electronic systems and components, and develop recommendations for electronic product optimal EMC design.Īutomation of electromagnetic compatability ( EMC) test facilitiesĮfforts to automate electromagnetic compatibility ( EMC) test facilities at Marshall Space Flight Center are discussed. Open area test site (OATS) and absorber line shielded room (AR) results are compared for equipment-under-test highest radiated emissions. Statistical EMC: A new dimension electromagnetic compatibility of digital electronic systemsĮlectromagnetic compatibility compliance test results are used as a database for addressing three classes of electromagnetic-compatibility ( EMC) related problems: statistical EMC profiles of digital electronic systems, the effect of equipment-under-test (EUT) parameters on the electromagnetic emission characteristics, and EMC measurement specifics. ![]()
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