1973-02-01

A Progress Report on Electromagnetic Activity of Motor Vehicle Manufacturer's Association 730057

Starting in 1965 and continuing through 1972, the Radio Committee of the Motor Vehicles Manufacturers Association (MVMA) has been the coordinator of a number of electromagnetic research projects. These investigations have included extensive applications of the updated SAE Standard, Measurement of Electromagnetic Radiation From Motor Vehicles (20-1000 MHz)-SAE J551a. Furthermore, there were joint testing programs with the Electronic Industries Association which encompassed measuring degradation in the performance of Land Mobile Radio Service receivers resulting from varying levels of impulsive-type radiation from motor vehicles. In addition, efforts were expended in using statistical approaches for testing a number of hypotheses covering a conversion of impulsive vehicle noise data to the interference potential to Land Mobile receivers.Information is provided on the objectives adopted in making the various studies, on how the testing programs were conducted, on the comparative advantages of different RFI measuring instruments, and on the scope and limitations of the results obtained. There are also descriptions with typical examples of the graphical methods used for the analysis of test results.

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