RF Exposure Information

FCC ID: XRAFB201A

RF Exposure Info

Download: PDF
FCCID_1730128

Fitbit, Inc. FCC ID: XRAFB201A, IC: 8542A-0000F201A 4 FCC §15.247 (i), §2.1091 & IC RSS-102 - RF Exposure 4.1 Applicable Standard 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 Electric Field Magnetic Field Frequency Range Power Density Averaging Time Strength Strength (MHz) (mW/cm2) (minutes) (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 fields. According to IC RSS-102 Issue 2 section 4.1, RF limits used for general public will be applied to the EUT. Frequency Range Electric Field Magnetic Field Power Density Time Averaging (MHz) (V/m rms) (A/m rms) (W/m2) (min) 0.003 - 1 280 2.19 - 6 1 - 10 280 / f 2.19 / f - 6 10 - 30 28 2.19 / f - 6 30 – 300 28 0.073 2* 6 0.5 0.5 300 – 1 500 1.585 f 0.0042 f f / 150 6 1 500 – 15 000 61.4 0.163 10 6 15 000 – 150 000 61.4 0.163 10 616000 / f1.2 150 000- 300 000 0.158 f0.5 4.21 x 10 -4 f0.5 6.67 x 10-5 f 616000 / f1.2 Note: ƒ is frequency in MHz * = Power density limit is applicable at frequencies greater than 100 MHz Report Number: R1203123-247 Page 9 of 27 FCC Part 15C/IC RSS-210 Test Report

Fitbit, Inc. FCC ID: XRAFB201A, IC: 8542A-0000F201A 4.2 MPE Prediction Predication of MPE limit at a given distance, Equation from 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 an isotropic radiator R = distance to the center of radiation of the antenna 4.3 MPE Results Maximum peak output power at antenna input terminal (dBm): 23.47 Maximum peak output power at antenna input terminal (mW): 222.33 Prediction distance (cm): 20 Prediction frequency (MHz): 2462 Maximum Antenna Gain, typical (dBi): 3.5 Maximum Antenna Gain (numeric): 2.24 Power density of prediction frequency at 20.0 cm (mW/cm2): 0.099 Power density of prediction frequency at 0.2 m (W/m2): 0.99 MPE limit for uncontrolled exposure at prediction frequency (mW/cm2): 1.0 MPE limit for uncontrolled exposure at prediction frequency (W/m2): 10 The device is compliant with the requirement MPE limit for uncontrolled exposure. The maximum power density at the distance of 20 cm is 0.099 mW/cm2 (0.99 W/m2).Limit is 1.0 mW/cm2 (10 W/m2). Report Number: R1203123-247 Page 10 of 27 FCC Part 15C/IC RSS-210 Test Report


Document Created: 2012-06-25 16:05:29
Document Modified: 2012-06-25 16:05:29
© 2025 FCC.report
This site is not affiliated with or endorsed by the FCC