This analysis report details the evaluation of a portable 2.4GHz Transceiver, specifically a Controller Unit designed for an RC Car. The tested sample operates across 33 channels, spanning the frequency range of 2420 to 2465MHz. Power is supplied by 2 x 1.5V AAA batteries, enabling the car's movement (forward, backward, left, and right) via controller inputs.
The device features an internal integral antenna with 0dBi gain. The nominal rated field strength is measured at 69.2dBμV/m at 3m (Average), with a maximum allowed production tolerance of +/- 3dB. Based on KDB 447498 D04 Interim General RF Exposure Guidance v01, the maximum allowed average field strength with production tolerance is 72.2dBμV/m at 3m.
The report concludes that the calculated field strength is below the minimum SAR exclusion threshold level. Further analysis, based on KDB 412172 D01, calculates the EIRP and field strength. Since the maximum average field strength plus production tolerance is less than 99.6dBuV/m @3m and the antenna gain is greater than or equal to 0.0dBi, the device complies with SAR requirements without needing further testing.