RF exposure evaluation

FCC ID: 2AFIW-X750C4

RF Exposure Info

Download: PDF
FCCID_4319218

Report No.: E20190417601701-8 Application No.:E20190417601701 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. FCC ID:2AFIW-X750C4Identifying code:748806

Report No.: E20190417601701-8 Application No.:E20190417601701 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 P=power input to antenna G=power gain of the antenna in the direction of interest relative to anisotropic radiator R=distance to the center of radiation of the antenna From the EUT RF output power, the minimum mobile separationdistance, d=0.2m, as well as the maximumgain of the used as follows, the RF powerdensity can be obtained. Frequency Antenna type and antenna Internal Maximum antenna Band number Identification gain Antenna 0 2.78dBi 2.4GHz WLAN Antenna Antenna 1 2.86dBi 5GHz WLAN Antenna Antenna 2 5.37dBi FCC ID:2AFIW-X750C4Identifying code:748806

Report No.: E20190417601701-8 Application No.:E20190417601701 4. Estimation Result 4.1 Conducted Power Results 2.4GHz WIFI Peak Conducted Output Antenna Mode Frequency(MHz) Power (dBm) 2412 14.53 Antenna 0 2437 13.67 2462 13.03 IEEE802.11b 2412 10.63 Antenna 1 2437 11.65 2462 12.72 2412 26.14 Antenna 0 2437 25.26 2462 24.07 IEEE802.11g 2412 24.46 Antenna 1 2437 25.37 2462 24.81 2412 23.95 Antenna 0 2437 23.68 2462 22.88 IEEE802.11n HT20 2412 20.59 Antenna 1 2437 22.10 2462 22.60 2422 21.45 Antenna 0 2437 21.28 2452 21.20 IEEE802.11n HT40 2422 18.40 Antenna 1 2437 18.92 2452 19.61 FCC ID:2AFIW-X750C4Identifying code:748806

Report No.: E20190417601701-8 Application No.:E20190417601701 5GHz WIFI AVGConducted Output Antenna Mode Frequency(MHz) Power (dBm) 5180 11.52 5200 11.97 5240 12.79 Antenna 2 IEEE 802.11a 5745 7.01 5785 9.35 5825 9.74 5180 10.76 5200 11.29 5240 12.19 Antenna 2 IEEE 802.11n HT20 5745 7.69 5785 9.97 5825 10.57 5190 11.01 5230 13.00 Antenna 2 IEEE 802.11n HT40 5755 8.11 5795 9.62 5210 7.83 Antenna 2 IEEE 802.11ac 80 5775 8.99 FCC ID:2AFIW-X750C4Identifying code:748806

Report No.: E20190417601701-8 Application No.:E20190417601701 4.2 Manufacturing tolerance 2.4GHz WIFI IEEE 802.11b (Peak) Frequency Antenna 0 Antenna 1 (MHz) 2412 2437 2462 2412 2437 2462 Target (dBm) 14.0 13.0 13.0 10.0 11.0 12.0 Tolerance ±(dB) 1.0 1.0 1.0 1.0 1.0 1.0 IEEE 802.11 g (Peak) Frequency Antenna 0 Antenna 1 (MHz) 2412 2437 2462 2412 2437 2462 Target (dBm) 26.0 25.0 24.0 24.0 25.0 24.0 Tolerance ±(dB) 1.0 1.0 1.0 1.0 1.0 1.0 IEEE 802.11 n HT20 (Peak) Frequency Antenna 0 Antenna 1 (MHz) 2412 2437 2462 2412 2437 2462 Target (dBm) 23.0 23.0 22.0 20.0 22.0 22.0 Tolerance ±(dB) 1.0 1.0 1.0 1.0 1.0 1.0 IEEE 802.11 n HT40 (Peak) Frequency Antenna 0 Antenna 1 (MHz) 2422 2437 2452 2422 2437 2452 Target (dBm) 21.0 21.0 21.0 18.0 18.0 19.0 Tolerance ±(dB) 1.0 1.0 1.0 1.0 1.0 1.0 FCC ID:2AFIW-X750C4Identifying code:748806

Report No.: E20190417601701-8 Application No.:E20190417601701 5GHz WIFI IEEE 802.11 a (AVG) Frequency Antenna 2 Antenna 2 (MHz) 5180 5200 5240 5745 5785 5825 Target (dBm) 11.0 11.0 12.0 7.0 9.0 9.0 Tolerance ±(dB) 1.0 1.0 1.0 1.0 1.0 1.0 IEEE 802.11n HT20(AVG) Frequency Antenna 2 Antenna 2 (MHz) 5180 5200 5240 5745 5785 5825 Target (dBm) 10.0 11.0 12.0 7.0 9.0 10.0 Tolerance ±(dB) 1.0 1.0 1.0 1.0 1.0 1.0 IEEE 802.11n HT40( AVG) Frequency Antenna 2 Antenna 2 (MHz) 5190 --- 5230 5755 --- 5795 Target (dBm) 11.0 --- 13.0 8.0 --- 9.0 Tolerance ±(dB) 1.0 --- 1.0 1.0 --- 1.0 IEEE 802.11ac 80(AVG) Frequency Antenna 2 (MHz) 5210 --- 5775 Target (dBm) 7.0 --- 8.0 Tolerance ±(dB) 1.0 --- 1.0 FCC ID:2AFIW-X750C4Identifying code:748806

Report No.: E20190417601701-8 Application No.:E20190417601701 4.3 Measurement Results 4.3.1 Standalone MPE 2.4GWLAN Antenna 0 Output power Antenna Antenna Duty MPE MPE Limits Mode Gain Gain (dBm) (mW) Cycle (mW/cm2) (mW/cm2) (dBi) (linear) IEEE 802.11 b 15 31.6228 2.78 1.8967 100% 0.0119 1.0000 IEEE 802.11 g 27 501.1872 2.78 1.8967 100% 0.1892 1.0000 IEEE 802.11 n HT20 24 251.1886 2.78 1.8967 100% 0.0948 1.0000 IEEE 802.11 n HT40 22 158.4893 2.78 1.8967 100% 0.0598 1.0000 Antenna 1 Output power Antenna Antenna Duty MPE MPE Limits Mode Gain Gain 2 (dBm) (mW) Cycle (mW/cm ) (mW/cm2) (dBi) (linear) IEEE 802.11 b 13 19.9526 2.86 1.8967 100% 0.0075 1.0000 IEEE 802.11 g 26 398.1072 2.86 1.8967 100% 0.1503 1.0000 IEEE 802.11 n HT20 23 199.5262 2.86 1.8967 100% 0.0753 1.0000 IEEE 802.11 n HT40 20 100.0000 2.86 1.8967 100% 0.0378 1.0000 5GWLAN Antenna 2 Output power Antenna Antenna Duty MPE MPE Limits Mode Gain Gain 2 (dBm) (mW) Cycle (mW/cm ) (mW/cm2) (dBi) (linear) IEEE 802.11 a 13.0 19.9526 5.37 3.4435 100% 0.0137 1.0000 IEEE 802.11 n HT20 13.0 19.9526 5.37 3.4435 100% 0.0137 1.0000 IEEE 802.11 n HT40 14.0 25.1189 5.37 3.4435 100% 0.0172 1.0000 IEEE 802.11 ac 80 9.0 7.9433 5.37 3.4435 100% 0.0054 1.0000 FCC ID:2AFIW-X750C4Identifying code:748806

Report No.: E20190417601701-8 Application No.:E20190417601701 Remark: 1. Maximum average power including tune-up tolerance; 2. MPE use distance is 20cm from manufacturer declaration of user manual. According to KDB447498 for Transmitters used in mobile exposure conditions for simultaneous transmission operations; ∑of MPE ratios≤ 1.0 Antenna 0 and Antenna 1 for 2.4GWLAN MPE Ratio MPE Ratio Mode ∑MPEratios Limit Results Antenna 0 Antenna 1 IEEE 802.11b 0.0119 0.0075 N/A 1.000 Pass IEEE 802.11g 0.1892 0.1503 N/A 1.000 Pass IEEE 802.11n HT20 0.0948 0.0753 0.1701 1.000 Pass IEEE 802.11n HT40 0.0598 0.0378 0.0976 1.000 Pass Antenna 2for 5GWLAN MPE Ratio Mode ∑MPEratios Limit Results Antenna 2 IEEE 802.11a 0.0137 N/A 1.000 Pass IEEE 802.11n HT20 0.0137 0.0137 1.000 Pass IEEE 802.11n HT40 0.0172 0.0172 1.000 Pass IEEE 802.11ac 80 0.0054 0.0054 1.000 Pass Maximum MPE Radios Maxmum Maximum Maximum Maximum MPE Ratio MPE Ratio ∑MPEratios Limit Results MPERatio2.4GHzWLAN MPERatio5GHzWLAN Celluar BT/ZigBee 0.1701 0.0172 0.4562 0.1566 0.8 1.000 Pass 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--------------- FCC ID:2AFIW-X750C4Identifying code:748806


Document Created: 2019-06-19 08:25:46
Document Modified: 2019-06-19 08:25:46
© 2025 FCC.report
This site is not affiliated with or endorsed by the FCC