Modular Wireless Certification Class Changes under FCC Rules
FCC modular class changes require Class I audit logs for minor zero-increase emissions shifts and Class II filings for higher gain, host SAR, or altered spurious profiles.
Full Modular Authorization
Meaning
A regulatory status granted to a wireless module allows it to be integrated into any host device without further transmitter testing or new equipment certification. Obtaining a full modular authorization requires the transceiver to meet all eight FCC structural requirements, including an on-board RF shield, buffered modulation inputs, and an independent power regulator. This authorization reduces the time and cost required to bring new connected products to market, making it the preferred choice for companies deploying complex wireless solutions in low-volume applications.
Shielding Requirement
The radio frequency circuitry must be entirely enclosed in a metal shielding can to prevent coupling with host signals. This shield ensures that the module’s emissions are independent of the host board layout or enclosure material. Without this physical barrier, the transmitter cannot achieve the modular status.
Host Integration
System integrators must follow the manufacturer’s layout guidelines to preserve the validity of the module’s certification. The host board must adhere to specific trace designs and antenna placements specified in the integration manual. Any deviation from these rules forces the integrator to seek a separate permissive change or a new product-level certification.
Regulatory Efficiency
The integration of a pre-certified module allows the final product to bypass the lengthy transmitter test sequence. The product must still undergo unintentional radiator testing, but this is much simpler and cheaper than full radio frequency testing. This efficient pathway allows rapid product iteration and deployment.