This document presents the Radio Frequency (RF) exposure evaluation for a Wireless USB-C to HDMI Transmitter and Receiver, adhering to FCC guidelines outlined in section 1.1310. The evaluation assesses the environmental impact of human exposure to radio frequency radiation, as specified in §1.1307(b). The device, identified by FCC ID 2A7Z4-ADO, falls under the category of a mobile device with separation greater than 20cm.
The evaluation considers the device's operating frequencies within the 5.180GHz to 5.240GHz and 5.745GHz to 5.825GHz bands for WIFI. The device is classified under General Population/Uncontrolled exposure limits. The assessment includes maximum output power measurements for 5G WIFI, specifically U-NII-1 and U-NII-3 bands, using 802.11a and 802.11n HT20 standards. Antenna gain is also factored into the evaluation, with MPE (Maximum Permissible Exposure) evaluation being the applied method.
The document provides limits for maximum permissible exposure, detailing electric field strength, magnetic field strength, and power density for both occupational/controlled and general population/uncontrolled exposures. Friis transmission formula is used to calculate power density at a specified distance, ensuring compliance with MPE limits. Measurement results for various modes and frequencies are presented, demonstrating adherence to the required safety standards.
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