Modular Transmitter Testing Criteria and Host Integration Compliance Rules
Modular approval requires eight statutory hardware conditions; host integrators must perform spot checking and unintentional radiator evaluation before market entry.
SAR Exposure Evaluation
Meaning
Radio-frequency safety assessment for wireless devices measures the rate at which energy is absorbed by the human body when exposed to a radiofrequency electromagnetic field. Performing a sar exposure evaluation is a prerequisite for certifying any mobile device or wearable module that operates close to the user body. This measurement quantifies the energy deposition in watts per kilogram of tissue.
The evaluation limits its scope to localized heating and does not assess ionizing radiation effects.
Testing Procedure
Robotic arm systems move an electric field probe inside a human model filled with simulated tissue liquid. During the sar exposure evaluation, the device transmits at its maximum power on each active band.
Regulatory Limit
Regulatory bodies like the Federal Communications Commission establish strict maximum absorption thresholds to protect public health. If the sar exposure evaluation reveals that the device exceeds the legal limit of one point six watts per kilogram, the hardware cannot be sold. This restriction forces designers to reduce transmitter output power or modify the antenna layout to redistribute the radiated energy.
A lower power setting minimizes exposure but may decrease the maximum range of the device.
Compliance Record
The certified laboratory generates a detailed documentation package that is submitted to the telecommunication certification body. This file holds the sar exposure evaluation curves and the chemical composition details of the tissue-equivalent liquid. The compliance report is archived in the public database of the regulator as a condition of the equipment authorization.
A successful filing allows the manufacturer to distribute the smart device.