VARIABILITY IN MEASUREMENT PROCEDURES FOR IGNITION NOISE

Measurements of electromagnetic radiation from automobiles do not always agree when made at different sites or at different times at the same site. A study has been made of SAE Standard J551c on measurement of such radiation from motor vehicles or other internal combustion devices (excluding aircraft) from 20 to 1000 MHz to determine whether portions of the standard are open to misinterpretation or may be imprecise enough to lead to variability in the findings. The report discusses some experiments to find the variability involved with antennas and test site configurations.

• Corporate Authors:

  Stanford Research Institute

  333 Ravenswood Avenue
  Menlo Park, CA  United States  94025

  Motor Vehicles Manufacturers Association

  320 New Center Building
  Detroit, MI  United States  48202
• Authors:
  • Shepherd, R A
  • Gaddie, J C
  • Nielson, D L
• Publication Date: 1974-10

Media Info

• Pagination: 126 p.

Subject/Index Terms

• TRT Terms: Electromagnetic waves; Experiments; Ignition; Ignition systems; Interference; Internal combustion engines; Location; Measurement; Methodology; Noise; Performance tests; Regulations; Standards; Variables; Vehicle power plants
• Uncontrolled Terms: Building sites
• Old TRIS Terms: Automobile engines; Electromagnetic noise; Noise standards
• Subject Areas: Environment; Highways; Law; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00093090
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Final Rpt., MVMA-SRI-74-06
• Files: TRIS
• Created Date: Dec 3 1976 12:00AM