This part of SAE J551 specifies off-vehicle radiation source test methods and procedures for testing passenger cars and commercial vehicles. Two methods for calibrating electromagnetic fields are defined in the document: a substitution method and a closed-loop method. The substitution method is the method most commonly used. SAE J551-1 specifies general, definitions, practical use, and basic principles of the test procedure.
J551-11 is nearly technically identical to ISO 11451-2 and we have concluded that we can accept the differences containd in th ISO document.