Navigating State Radio Regulatory Commission Approvals for Wireless Hardware
Obtaining SRRC type approval requires accredited domestic laboratory testing, valid in-country agency representation, and strict RF emission compliance.
Restricted Modular Approval
Meaning
Regulatory certification granted to a wireless module that does not meet all the standard physical requirements for standalone operation. Under a restricted modular approval, the transmitter is certified only for use within specific host platforms or under certain operating conditions that compensate for the module’s lack of full on-board shielding or power regulation. This approach allows manufacturers to use custom radio designs while avoiding full system re-testing.
Host Dependency
Hardware configuration of the host device must provide the shielding or voltage regulation that the module itself lacks. When a module relies on a restricted modular approval, the integration guide specifies the exact shielding layout and power delivery constraints that the host board must implement. These specifications ensure that the assembled system limits spurious emissions to the same degree as a fully shielded component.
Testing Procedure
Verification of compliance must be performed with the module installed in the specific host or evaluation board that replicates the intended environment. Obtaining a restricted modular approval requires the manufacturer to demonstrate that the combination of the module and the specific host design meets all regulatory standards. This testing is narrower than a full product certification but must be repeated if the module is migrated to a different host architecture.
The laboratory reports must detail the specific host model and configuration used during the evaluation to define the legal boundaries of the approval.
Product Labeling
Documentation and labeling must state the limitations under which the certification remains valid. The manual for a module with a restricted modular approval must instruct the integrator on how to maintain compliance during assembly. This documentation is reviewed during audits.