Audit Protocols for Host Integration Documents and Class Two Permissive Changes
Modular radio grants only protect host products when integration documentation, antenna parameters, and Class II permissive change filings match final hardware.
Multi Radio Co Location
Meaning
Wireless hardware configurations where two or more transmitter modules are installed in the same host device and operate within twenty centimeters of each other define a co-located layout. This setup of multi radio co location requires special regulatory assessment because the combined RF emissions may exceed exposure limits or generate intermodulation products. It prevents the simple reuse of individual modular grants without evaluating the joint impact of all active transceivers.
Designers must analyze both simultaneous transmission RF exposure and the likelihood of cross-modulation before the product can be certified.
Interference Risk
High frequency energy from one radio can leak into the receiver of another, causing receiver desensitization. This effect degrades the data rate and reliable range of both modules. The risk is high in compact devices where antennas are positioned very close together.
Evaluation Standard
Laboratories calculate the sum of the individual transmitter power ratios to check if they exceed the composite exposure threshold. This step is followed by radiated emissions testing while both transmitters are active. It ensures that no harmful mixing products are generated.
Mitigation Strategy
Implementing hardware filters or software co-existence protocols helps manage the transmit cycles of the radios. This approach ensures that the devices do not transmit simultaneously on adjacent channels. It maintains system throughput while satisfying regulatory limits.