RF exposure information

FCC ID: 2AKCY-HWAS1BLE40

RF Exposure Info

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FCCID_3662254

Compliance Certification Services (Shenzhen) Inc. Report No: C171031Z14-RP1_MPE FCC ID: 2AKCY-HWAS1BLE40 Date of Issue: November 8, 2017 MPE Report Exposure category: General population/uncontrolled environment EUT Type: Production Unit Device Type: Mobile Device Refer Standard: KDB 447498 D01 General RF Exposure Guidance v06 FCC Part 2 §2.1091 1. Evaluation method Systems operating under the provisions of FCC 47 CFR section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as mobile device whereby a distance of 0.2m normally can be maintained between the user and the device, and below RF Permissible Exposure limit shall comply with. In accordance with KDB447498D01 for Simultaneous transmission MPE test exclusion applies when the sum of the MPE ratios for all simultaneous transmitting antennas incorporated in a host device, based on the calculated/estimated, numerically modeled or measured field strengths or power density, is ≤ 1.0. The MPE ratio of each antenna is determined at the minimum test separation distance required by the operating configurations and exposure conditions of the host device, according to the ratio of field strengths or power density to MPE limit, at the test frequency. Either the maximum peak or spatially averaged results from measurements or numerical simulations may be used to determine the MPE ratios. Spatial averaging does not apply when MPE is estimated using simple calculations based on far-field plane-wave equivalent conditions. The antenna installation and operating requirements for the host device must meet the minimum test separation distances required by all antennas, in both standalone and simultaneous transmission operations, to satisfy compliance. 2. Limits for General Population/Uncontrolled Exposure 3. Calculation Method Predication of MPE limit at a given distance Equation from page 18 of OET Bulletin 65, Edition 97-01 S=PG/4πR² Where: S=power density

Compliance Certification Services (Shenzhen) Inc. Report No: C171031Z14-RP1_MPE FCC ID: 2AKCY-HWAS1BLE40 Date of Issue: November 8, 2017 P=power input to antenna G=power gain of the antenna in the direction of interest relative to an isotropic radiator R=distance to the center of radiation of the antenna From the EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the maximum gain of the used antenna is 0.8dBi for Bluetooth , the RF power density can be obtained. Frequency Antenna type and antenna number Maximum antenna Band gain 2.4GHz BT Antenna 0.8dBi 4. Estimation Result 4.1 Conducted Power Results Bluetooth Conducted Output Power Mode Channel Frequency(MHz) (dBm) 00 2402 7.41 GFSK-BLE 19 2440 8.00 39 2480 8.48 4.2 Manufacturing tolerance GFSK – BT LE Frequency 2402 2442 2480 (MHz) Target (dBm) 7.0 8.0 8.0 Tolerance ±(dB) 1.0 1.0 1.0 4.3 Measurement Results 4.3.1 Standalone MPE Bluetooth Antenna Antenna MPE Output power Duty MPE Mode Gain Gain Limits Cycle (mW/cm2) (dBm) (mW) (dBi) (linear) (mW/cm2) GFSK – BT LE 9.00 7.9433 0.80 1.2023 100% 0.00190 1.0000 Remark: 1. Maximum power including tune-up tolerance; 2. MPE use distance is 20cm from manufacturer declaration of user manual. Conclusion The measurement results comply with the FCC Limit per 47 CFR 2.1091 for the uncontrolled RF Exposure of mobile device. ---------------- END OF REPORT---------------


Document Created: 2017-11-21 15:18:48
Document Modified: 2017-11-21 15:18:48
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