RF exposure evaluation

FCC ID: 2AS33-SX

RF Exposure Info

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FCCID_4252570

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2AS33-SX FCC RF Exposure Evaluation 1. Product Information FCC ID: 2AS33-SX Product name Bluetooth earphone Model number S2, S3, S5, S6, S3P, S8P, S2P, S8, S9, SX BOX: DC 3.7V by battery(900mAh) Power supply Recharged by DC 5V/50mA EARBUDS: DC 3.7V by battery(45mAh) GFSK, π/4-DQPSK, 8-DPSK for V5.0 (BT Classics) Modulation Type GFSK for Bluetooth V5.0 (BT LE) Antenna Type Internal Antenna Antenna Gain 2.0 dBi (maximum) Hardware version RD-RT-S2-A3 Software version RD-RT-S2-MS-V5.0 Bluetooth Operation frequency 2402MHz-2480MHz Exposure category General population/uncontrolled environment EUT Type Production Unit Device Type Portable 2. Evaluation Method According to KDB447498 D01 General RF Exposure Guidance v06 Section 4.3.1 Standalone SAR test exclusion considerations: “Unless specifically required by the published RF exposure KDB procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population exposure conditions, by measurement or numerical simulation, is not required when the corresponding SAR Test Exclusion Threshold condition, listed below, is satisfied. These test exclusion conditions are based on source-based time-averaged maximum conducted output power of the RF channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation distance required for the exposure conditions.22 The minimum test separation distance is determined by the smallest distance from the antenna and radiating structures or outer surface of the device, according to the host form factor, exposure conditions and platform requirements, to any part of the body or extremity of a user or bystander (see 5) of section 4.1). To qualify for SAR test exclusion, the test separation distances applied must be fully explained and justified by the operating configurations and exposure conditions of the transmitter and applicable host platform requirements, typically in the SAR measurement or SAR analysis report, according to the required published RF exposure KDB procedures. When no other RF exposure testing or reporting is required, a statement of justification and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for the SAR test exclusion. When required, the device specific conditions described in the other published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion provisions; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.“ [(max. power of channel, including tune-up tolerance, mW)/ (min. test separation distance, mm)+ · *√f (GHz)+ ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where: • f (GHz) is the RF channel transmit frequency in GHz • Power and distance are rounded to the nearest mW and mm before calculation • The result is rounded to one decimal place for comparison • 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm according to 5) in section 4.1 is applied to determine SAR test exclusion. When one of the following test exclusion conditions is satisfied for all combinations of simultaneous transmission configurations, further equipment approval is not required to incorporate transmitter modules in host devices that operate in the mixed mobile and portable host platform exposure This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 3

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2AS33-SX conditions. The grantee is responsible for documenting this according to Class I permissive change requirements. Antennas that qualify for standalone SAR test exclusion must apply the estimated standalone SAR to determine simultaneous transmission test exclusion. a) The [∑ of (the highest measured or estimated SAR for each standalone antenna configuration, adjusted for maximum tune-up tolerance) / 1.6 W/kg] + [∑ of MPE ratios] is ≤ 1.0. b) The SAR to peak location separation ratios of all simultaneously transmitting antenna pairs operating in portable device exposure conditions are all ≤ 0.04, and the [∑ of MPE ratios] is ≤ 1.0. 3. Refer Evaluation Method ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz. FCC KDB publication 447498 D01 General RF Exposure Guidance v06: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization Policies. FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits. FCC CFR 47 part2 2.1093: Radiofrequency radiation exposure evaluation: portable devices 4. Conducted Power Results Mode Channel Frequency(MHz) Peak Conducted Output Power (dBm) 0 2402 -0.631 GFSK 39 2441 -0.058 78 2480 -0.208 0 2402 1.927 π/4DQPSK 39 2441 2.435 78 2480 1.997 0 2402 2.324 8DPSK 39 2441 2.864 78 2480 2.291 0 2402 0.096 LE GFSK 19 2440 -0.192 39 2480 -1.360 0 2402 -0.491 2LE GFSK 19 2440 -0.011 39 2480 -0.230 This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 2 of 3

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2AS33-SX 5. Manufacturing Tolerance GFSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0 0 0 Tolerance ±(dB) 1.0 1.0 1.0 π/4-DQPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 2.0 2.0 2.0 Tolerance ±(dB) 1.0 1.0 1.0 8DPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 2.0 2.0 2.0 Tolerance ±(dB) 1.0 1.0 1.0 GFSK – BT LE(Peak) Channel Channel 0 Channel 19 Channel 39 Target (dBm) 0 0 -1.0 Tolerance ±(dB) 1.0 1.0 1.0 GFSK – BT 2LE(Peak) Channel Channel 0 Channel 19 Channel 39 Target (dBm) 0 0 0 Tolerance ±(dB) 1.0 1.0 1.0 6. Evaluation Results 6.1 Standalone Evaluation Antenna RF output power SAR Test Exclusion SAR Test Band/Mode f (GHz) Distance dBm mW Threshold Exclusion (mm) GFSK 2.450 5 1.00 1.2589 0.4 < 3.0 Yes π/4DQPSK 2.450 5 3.00 1.9953 0.6 < 3.0 Yes 8DPSK 2.450 5 3.00 1.9953 0.6 < 3.0 Yes LE GFSK 2.450 5 1.00 1.2589 0.4 < 3.0 Yes 2LE GFSK 2.450 5 1.00 1.2589 0.4 < 3.0 Yes Remark: (1). RF output power including tune up tolerance; (2). When the minimum test separation distance is < 5 mm, a distance of 5 mm according to f) in section 4.1 of KDB 447498 is applied to determine SAR test exclusion. 6.2 Simultaneous Transmission for SAR Exclusion The sample support one BT modular and one antenna, no need consider simultaneous transmission; 7. Conclusion The measurement results comply with the FCC Limit per 47 CFR 2.1093 for the uncontrolled RF Exposure and SAR Exclusion Threshold per KDB 447498 v06. ----------------THE END OF REPORT--------------- This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 3 of 3


Document Created: 2019-04-16 11:42:15
Document Modified: 2019-04-16 11:42:15
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