Host Integration Documentation Audits for Modular Radio Approvals
Host modular radio audits prevent costly market re-certification by verifying trace layout specs, exposure limits, and grant scope before compliance filings.
SAR Exclusion Thresholds
Meaning
Regulatory output power limits defined by exposure standards specify when a wearable or body-worn wireless device does not require specific absorption rate testing. Consulting the sar exclusion thresholds allows engineering teams to prove compliance without renting expensive laboratory time to measure tissue heating. The exemption depends on both the frequency of the radio and the distance to the human body.
Separation Distance
Proximity dictates the safe power limit for the transmitter. If the device remains closer than five millimeters to the user, the calculated limits under the sar exclusion thresholds are at their most restrictive.
Duty Cycle Factor
Calculations include the worst-case transmit duty cycle to assess the average exposure. When the product uses sar exclusion thresholds to qualify, the software must limit the active transmission window to maintain an average power below the exclusion limit. This calculation must be submitted to the FCC database.
Certification Strategy
If the power levels sit safely below the computed limits, the system qualifies for a test waiver. Referencing the sar exclusion thresholds in the certification filing allows for a faster, less expensive path to market for lightweight IoT devices. This filing requires a formal signature from the lead hardware engineer.