Harmonized System Entry Mechanics for Dual-Function Wireless Assemblies
Dual-function wireless assemblies require precise Harmonized System classification and synchronized telecommunications filings to prevent customs border holds.
47 CFR Section 15.212
Meaning
Certification criteria defined by the Federal Communications Commission allow for the approval of radio frequency modules independent of a specific host device. Application of 47 cfr section 15.212 enables manufacturers to integrate wireless components into various products without repeating the full suite of unintentional radiator tests for every new assembly. The rule sets the requirements for physical shielding and buffered data inputs.
Shielding Specification
A compliant module must have its own radio frequency shielding to prevent coupling with the host circuitry. This 47 cfr section 15.212 requirement ensures that the module emissions remain consistent regardless of the internal enclosure environment. Physical metal covers typically provide this isolation by surrounding the transmitter components.
Reference Design
Data must be buffered so that the device meets emissions limits regardless of the data rate or modulation applied by the host. The power supply must be regulated to maintain stable operation across a range of input voltages. Designers must adhere to these constraints to maintain the validity of the modular grant.
Testing is performed at the module level to ensure the hardware remains within legal limits.
Labelling Obligation
Every host containing the component must clearly display the identification number assigned by the commission.