Meaning
A formal regulatory filing submitted to a government telecommunications authority describes modifications made to a certified radio module. Obtaining a permissive change Class II approval is required when hardware changes affect the radio frequency emissions or the transmitter’s performance without requiring a complete re-certification. This filing allows the manufacturer to update the product while maintaining its original certification.
Modification Scope
The scope of changes allowed under this category is strictly defined by regulatory bodies. During a permissive change Class II filing, modifications such as replacing a passive component with a different value or altering the antenna layout must be documented. These changes must not exceed the permitted limits or introduce new spurious emissions.
Required Testing
Laboratory testing must be conducted to prove that the modified device remains compliant with the original limits. Engineers measure the radiated emissions and output power of the updated assembly to confirm that no new interference has been introduced. The resulting test report must be submitted to the telecommunications certification body for review.
Once approved, the updated module can be integrated into the final product without delay, saving substantial development cost. This test report is the required handover document for the compliance folder.
Documentation Update
Technical construction files must be updated with the new schematics and test data. This ensures that the product’s compliance history remains accurate and complete for future audits.