RF Exposure

FCC ID: CNFKWST1

RF Exposure Info

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FCCID_3145717

GoPro, Inc. FCC ID: CNFKWST1, IC: 10193A-KWST1 5 FCC §2.1091 & §15.247(i) & ISED RSS-102 - RF Exposure 5.1 Applicable Standards According to FCC §15.247(i) and §1.1307(b)(1), systems operating under the provisions of this 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. Limits for General Population/Uncontrolled Exposure Frequency Electric Field Magnetic Field Power Density Averaging Time Range Strength Strength (mW/cm2) (minutes) (MHz) (V/m) (A/m) Limits for General Population/Uncontrolled Exposure 0.3-1.34 614 1.63 * (100) 30 2 1.34-30 824/f 2.19/f * (180/f ) 30 30-300 27.5 0.073 0.2 30 300-1500 / / f/1500 30 1500-100,000 / / 1.0 30 f = frequency in MHz * = Plane-wave equivalent power density Before equipment certification is granted, the procedure of IC RSS-102 must be followed concerning the exposure of humans to RF field According to ISED 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 MHz6 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/ƒ0.5 W (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). In these cases, the information contained in the RF exposure technical brief may be limited to information that demonstrates how the e.i.r.p. was derived. Report Number: R1605031-247 Page 14 of 79 FCC Part 15C/ISED RSS-247 Test Report

GoPro, Inc. FCC ID: CNFKWST1, IC: 10193A-KWST1 5.2 MPE Prediction Predication of MPE limit at a given distance, Equation from OET Bulletin 65, Edition 97-01 S = PG/4R² Where: S = power density 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 5.3 MPE Results Maximum output power at antenna input terminal (dBm): 22.87 Maximum output power at antenna input terminal (mW): 193.6 Prediction distance (cm): 20 Prediction frequency (MHz): 2412 Maximum Antenna Gain, typical (dBi): 4 Maximum Antenna Gain (numeric): 2.512 Power density of prediction frequency at 20.0 cm (mW/cm2): 0.097 FCC MPE limit for uncontrolled exposure at prediction frequency (mW/cm2): 1.0 The device is compliant with the requirement MPE limit for uncontrolled exposure. The maximum power density at the distance of 20 cm is 0.097mW/cm2, limit is 1.0mW/cm2. 5.4 ISED Routine RF Exposure Exemption The max tune-up peak conducted output power is 22.87 dBm at 2412 MHz and the antenna gain is 4 dBi, so the e.i.r.p is 26.87 dBm (0.486 W). Exemption from Routine Evaluation Limit is: -2 0.6834 -2 0.6834 1.31 x 10 ƒ = 1.31 x 10 x 2412 = 2.68 > 0.486 So the device is compliance exemption from Routine Evaluation Limits –RF exposure Evaluation. Report Number: R1605031-247 Page 15 of 79 FCC Part 15C/ISED RSS-247 Test Report


Document Created: 2017-12-15 03:34:12
Document Modified: 2017-12-15 03:34:12
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