MPE estimation

FCC ID: XKB-D3500CLWI

RF Exposure Info

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FCCID_3767007

Maximum Permissible Exposure (MPE) & Exposure evaluation Report identification number: 1-4862/17-01-08 Certification numbers and labeling requirements FCC ID XKB-D3500CLWI IC number 2586D-D3500CLWI HVIN (Hardware Version Identification Number) Desk/3500 CL/Eth/Mod/WiFi PMN (Product Marketing Name) Desk/3500 FVIN (Firmware Version Identification Number) -/- HMN (Host Marketing Name) -/- This test report is electronically signed and valid without handwriting signature. For verification of the electronic signatures, the public keys can be requested at the testing laboratory. Document authorized: DN: cn=Thomas Vogler, o=CTC advanced GmbH, ou=VOG-161125, email=thomas.vogler@ctcadvanced.com, c=DE Datum: 2018.01.24 12:05:37 +01'00' Thomas Vogler Lab Manager Radio Communications & EMC Page 1 of 3

EUT technologies: Technologies: Max. power conducted: (AVG) Max. antenna gain: Min. pathloss: WLAN 2.4 GHz Declared 15 dBm Measured : -0.7 dBi -- (if applicable) WLAN 5 GHz Declared 15 dBm Measured : 5.3 dBi -- (if applicable) RFID 13.56 MHz )* Declared 20 dBm )* exempted from routine evaluation Prediction of MPE limit at given distance - FCC Equation from page 18 of OET Bulletin 65, Edition 97-01 S = PG / 4π R2 where: S = Power density P = Power input to the antenna G = Antenna gain R = Distance to the center of radiation of the antenna The table below is excerpted from Table 1B of 47 CFR 1.1310 titled “Limits for Maximum Permissible Exposure (MPE), Limits for General Population/Uncontrolled Exposure” Frequency Range (MHz) Power Density (mW/cm2) Averaging Time (minutes) 300 -1500 f/1500 30 1500 - 100000 1.0 30 where f = Frequency (MHz) Prediction: worst case > 1500 MHz > 1500 MHz Technology WLAN @ 2450 MHz WLAN @ 5 GHz P Max power input to the antenna 15 dBm 15 dBm R Distance 20 cm 20 cm G Antenna gain -0.7 dBi 5.3 dBi S MPE limit for uncontrolled exposure 1 mW/cm2 1 mW/cm2 Calculated Power density: 0.0054 mW/cm² 0.0213 mW/cm² This prediction demonstrates the following: The power density levels for FCC at a distance of 20 cm are below the maximum levels allowed by regulations. Page 2 of 3

Prediction of MPE limit at given distance - IC RSS-102, Issue 5, 2.5.2 RF exposure evaluation is required if the separation distance between the user and/or bystander and the device’s radiating element is greater than 20 cm, except when the device operates as follows: • below 20 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 1 W (adjusted for tune-up tolerance); • at or above 20 MHz and below 48 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 4.49/ƒ0.5W (adjusted for tune-up tolerance), where ƒ is in MHz; • at or above 48 MHz and below 300 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 0.6 W (adjusted for tune-up tolerance); • at or above 300 MHz and below 6 GHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 1.31 x 10-2 ƒ0.6834 W (adjusted for tune-up tolerance), where ƒ is in MHz; • at or above 6 GHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 5 W (adjusted for tune-up tolerance). Prediction: worst case 0.3 - 6 GHz 0.3 - 6 GHz Technology - WLAN 2450 MHz 5180 MHz P Max power input to the antenna 15 dBm 15 dBm R Distance 20 cm 20 cm G Antenna gain -0.7 dBi 5.3 dBi Maximum EIRP 26.9 mW 107.2 mW Exclusion Limit from above: 2.71 W 4.53 W Conclusion: RF exposure evaluation is not required. For applications where minimum distance to radiating element is 20cm Annex C of RSS-102 should be filled out. Page 3 of 3


Document Created: 2018-01-24 12:05:37
Document Modified: 2018-01-24 12:05:37
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