Meaning
Regulatory verification process required when a pre-certified radio module is integrated into a new electronic device housing determines the level of additional testing needed. When a manufacturer embeds a certified wireless module, host requalification establishes whether the change in the physical environment affects compliance. The new enclosure and nearby copper traces can alter the radiation characteristics of the antenna, making further evaluation necessary.
Assessment Criterion
Engineers evaluate several physical factors to decide if a full testing cycle is needed or if a simple permissive change is sufficient. The distance between the antenna and the body of the user remains the primary factor in this determination. If the distance decreases below twenty centimeters, the module transitions from mobile to portable use, triggering a stricter evaluation path.
Regulatory Path
The regional regulatory body outlines the specific classification of changes that require filing. Under federal regulations, a class one permissive change covers minor alterations that do not increase emissions, while a class two change demands the submission of new test data. The integrator must document these decisions in the technical file to maintain the validity of the original equipment authorization.
This documentation must include placement diagrams and conducted power measurements to prove that the original certification parameters remain valid within the new configuration.
Testing Detail
Laboratory testing focuses on radiative spurious emissions and specific absorption rate measurements that are sensitive to the physical design of the host. The integration of a metal bracket or a larger battery pack can inadvertently act as a secondary radiator. Capturing these effects requires testing the device in its final, commercial shell.
