The VTI National Transport Library Catalogue

Testing for FM radio interference in motor vehicles Lewis, Donald

By: Lewis, DonaldPublication details: Transportation Research Board, 2001; Conference proceeding 23, Description: nr 23, s. 211-4Subject(s): USA | Conference | Radio | Frequency | Electronics | Failure | 914Bibl.nr: VTI P9000:23Location: Abstract: The increased use of electronics in modern vehicles has led to compatibility problems between vehicle electronic systems and after-market electronic equipment typically installed in Texas Department of Transportation (TxDOT) vehicles. Radio frequency interference (RFI) between these electronic systems frequently produces random failure of both original equipment manufacturer and after-market components. Interference with TxDOT onboard two-way communication systems can significantly reduce the useful communication range. This interference problem must be analyzed and studied from the standpoint of the FM two-way radio's characteristics and the automotive systems. Other system interference problems can also occur. Failures of critical vehicle systems due to RFI can adversely affect the operation of these vehicles and pose grave safety problems. Guidelines for minimum acceptable RFI limits in motor vehicles must be examined and improved. The overall objective of this project is to develop and validate effective RFI test procedures that will allow TxDOT to identify potential compatibility and RFI problems related to the use of after-market equipment in its vehicles. The first step in this process will be to investigate RFI problems and current RFI test standards. After this review process, a detailed test procedure will be developed. The second phase of the project will be validation of the test procedure. The RFI test procedure to be developed will benefit not only TxDOT but other DOTs across the country as well.
Item type: Reports, conferences, monographs
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The increased use of electronics in modern vehicles has led to compatibility problems between vehicle electronic systems and after-market electronic equipment typically installed in Texas Department of Transportation (TxDOT) vehicles. Radio frequency interference (RFI) between these electronic systems frequently produces random failure of both original equipment manufacturer and after-market components. Interference with TxDOT onboard two-way communication systems can significantly reduce the useful communication range. This interference problem must be analyzed and studied from the standpoint of the FM two-way radio's characteristics and the automotive systems. Other system interference problems can also occur. Failures of critical vehicle systems due to RFI can adversely affect the operation of these vehicles and pose grave safety problems. Guidelines for minimum acceptable RFI limits in motor vehicles must be examined and improved. The overall objective of this project is to develop and validate effective RFI test procedures that will allow TxDOT to identify potential compatibility and RFI problems related to the use of after-market equipment in its vehicles. The first step in this process will be to investigate RFI problems and current RFI test standards. After this review process, a detailed test procedure will be developed. The second phase of the project will be validation of the test procedure. The RFI test procedure to be developed will benefit not only TxDOT but other DOTs across the country as well.

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