Managing Dual Band Radio Laboratory Testing under Chinese Regulatory Frameworks
SRRC approval for dual-band radios demands locked firmware power tables, local agent coordination, and strict host radiated spur compliance to avoid re-test delays.
Host Integration Re-Testing
Meaning
Secondary evaluation of a previously certified wireless module checks its performance after it is installed inside a specific end-product chassis. This host integration re-testing identifies electromagnetic leaks or shifts in radiation patterns caused by nearby metal structures, batteries or displays. While modular approval covers the signal generation, it does not account for the specific path loss or interference inside a custom-shaped enclosure.
This sequence typically focuses on radiated emissions rather than internal board metrics.
Interface Verification
Every new layout introduces unknown variables that might affect the input impedance of the modular radio. Host integration re-testing ensures that the control signals from the host processor do not introduce noise onto the power rails of the transceiver. Lab teams perform partial spectral sweeps to confirm no harmonics are amplified by the geometry of the device casing.
If noise is detected, technicians add shielding gaskets at the interface between the screen and the module.
System Sensitivity
Integration often reduces the overall signal sensitivity due to internal electromagnetic background noise. Performing host integration re-testing allows engineers to recalibrate the software for optimal performance inside the unique physical environment of the device. The data gathered here helps set the final expectations for network reliability and data throughput.
Verification of the power budget ensures the module does not draw excessive current when connected to the main product power system.
Audit Consequence
Regulatory groups use the results of host integration re-testing to issue a supplementary grant for the complete assembly. Manufacturers use these reports to prove that the product meets specific absorption rate requirements when held against the skin. If a test shows values above the original limit, the grant cannot be extended to the new host.
The filing remains incomplete until host-level radiation patterns are documented.
SRRC Filing Timelines for a Product Entering China
SRRC radio type approval in China takes 8 to 16 weeks, requiring local agent representation, strict customs sample clearing, and accredited domestic lab scans.