RF Exposure MPE

FCC ID: A4R-W2

RF Exposure Info

Download: PDF
FCCID_2305804

FCC Part 1 Subpart I FCC Part 2 Subpart J INDUSTRY CANADA RSS 102 ISSUE 3 RF EXPOSURE REPORT FOR 802.11a/b/g/n and Bluetooth Audio /Video Device MODEL NUMBER: W2 FCC ID: A4R-W2 IC: 10395A-W2 REPORT NUMBER: 14U17400-6 Revision A ISSUE DATE: June 10, 2014 Prepared for GOOGLE 1600 AMPHITHEATRE PARKWAY MOUNTAIN VIEW CA, 94043, US Prepared by UL VERIFICATION SERVICES INC. 47173 BENICIA STREET FREMONT, CA 94538, U.S.A. TEL: (510) 771-1000 FAX: (510) 661-0888

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 Revision History Issue Rev. Date Revisions Revised By -- 4/28/14 Initial Issue F. de Anda Update- manufacture’s tolerance and BT antenna A 6/10/14 F. de Anda gain(3.6 dBi) Page 2 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 TABLE OF CONTENTS 1. ATTESTATION OF TEST RESULTS ................................................................................. 4 2. TEST METHODOLOGY ..................................................................................................... 5 3. REFERENCES ................................................................................................................... 5 4. FACILITIES AND ACCREDITATION ................................................................................. 5 5. MAXIMUM PERMISSIBLE RF EXPOSURE ....................................................................... 6 5.1. FCC RULES ................................................................................................................ 6 5.2. IC RULES .................................................................................................................... 7 5.3. EQUATIONS................................................................................................................ 8 5.4. LIMITS AND IC EXEMPTION .....................................................................................10 6. RF EXPOSURE RESULTS ................................................................................................11 Page 3 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 1. ATTESTATION OF TEST RESULTS COMPANY NAME: GOOGLE 1600 AMPHITHEATRE PARKWAY MOUNTAIN VIEW, CA, 94043 US EUT DESCRIPTION: 802.11a/b/g/n and Bluetooth Audio /Video Device MODEL: W2 SERIAL NUMBER: Conducted: AD3Z1410029F Radiated: AD3Z141002FC DATE TESTED: April 2 to April 11, 2014 APPLICABLE STANDARDS STANDARD TEST RESULTS FCC PART 1 SUBPART I & PART 2 SUBPART J Pass INDUSTRY CANADA RSS 102 ISSUE 3 Pass UL Verification Services Inc. calculated the RF Exposure of the above equipment in accordance with the requirements set forth in the above standards, using test results reported in the test report documents referenced below and/or documentation furnished by the applicant. All indications of Pass/Fail in this report are opinions expressed by UL Verification Services Inc. based on interpretations of these calculations. The results show that the equipment is capable of demonstrating compliance with the requirements as documented in this report. Note: The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein. This document may not be altered or revised in any way unless done so by UL Verification Services Inc. and all revisions are duly noted in the revisions section. Any alteration of this document not carried out by UL Verification Services Inc. will constitute fraud and shall nullify the document. This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST, any agency of the Federal Government, or any agency of any government. Approved & Released For UL Verification Services Inc. By: Calculated By: FRANCISCO DE ANDA JOE VANG PROJECT LEAD EMC ENGINEER UL Verification Services Inc. UL Verification Services Inc. Page 4 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 2. TEST METHODOLOGY All calculations were made in accordance with FCC OET Bulletin 65 Edition 97-01 and IC Safety Code 6. 3. REFERENCES All measurements were made as documented in test report UL Verification Services Inc. Document 14U17400-1 and 14U17400-4 for operation in the 2.4 GHz band and UL Verification Services Inc. Document 14U17400-1 and 14U17400-2 for operation in the 5 GHz bands. Output power, Duty cycle and Antenna gain data is excerpted from the applicable test reports. Antenna gain data is excerpted from product documentation provided by the applicant. 4. FACILITIES AND ACCREDITATION The test sites and measurement facilities used to collect data are located at 47173 Benicia Street, Fremont, California, USA. UL Verification Services Inc. is accredited by NVLAP, Laboratory Code 200065-0. The full scope of accreditation can be viewed at http://ts.nist.gov/standards/scopes/2000650.htm. Page 5 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 5. MAXIMUM PERMISSIBLE RF EXPOSURE 5.1. FCC RULES §1.1310 The criteria listed in Table 1 shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in §1.1307(b), except in the case of portable devices which shall be evaluated according to the provisions of §2.1093 of this chapter. Page 6 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 5.2. IC RULES IC Safety Code 6, Section 2.2.1 (a) A person other than an RF and microwave exposed worker shall not be exposed to electromagnetic radiation in a frequency band listed in Column 1 of Table 5, if the field strength exceeds the value given in Column 2 or 3 of Table 5, when averaged spatially and over time, or if the power density exceeds the value given in Column 4 of Table 5, when averaged spatially and over time. Page 7 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 5.3. EQUATIONS POWER DENSITY Power density is given by: S = EIRP / (4 * Pi * D^2) Where S = Power density in mW/cm^2 EIRP = Equivalent Isotropic Radiated Power in mW D = Separation distance in cm Power density in units of mW/cm^2 is converted to units of W/m^2 by multiplying by 10. DISTANCE Distance is given by: D = SQRT (EIRP / (4 * Pi * S)) Where D = Separation distance in cm EIRP = Equivalent Isotropic Radiated Power in mW S = Power density in mW/cm^2 SOURCE-BASED DUTY CYCLE Where applicable (for example, multi-slot cell phone applications) a duty cycle factor may be applied. Source-based time-averaged EIRP = (DC / 100) * EIRP Where DC = Duty Cycle in %, as applicable EIRP = Equivalent Isotropic Radiated Power in W Page 8 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 MIMO AND COLOCATED TRANSMITTERS (IDENTICAL LIMIT FOR ALL TRANSMITTERS) For multiple chain devices, and colocated transmitters operating simultaneously in frequency bands where the limit is identical, the total power density is calculated using the total EIRP obtained by summing the EIRP (in linear units) of each transmitter. Total EIRP = (EIRP1) + (EIRP2) + ... + (EIRPn) where EIRPx = Source-based time-averaged EIRP of chain x or transmitter x The total EIRP is then used to calculate the Power Density or the Distance as applicable. MIMO AND COLOCATED TRANSMITTERS For multiple colocated transmitters operating simultaneously in frequency bands where different limits apply: The Power Density at the specified separation distance is calculated for each transmitter chain or transmitter. The fraction of the exposure limit is calculated for each chain or transmitter as (Power Density of chain or transmitter) / (Limit applicable to that chain or transmitter). The fractions are summed. Compliance is established if the sum of the fractions is less than or equal to one. Page 9 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 5.4. LIMITS AND IC EXEMPTION VARIABLE LIMITS For mobile radio equipment operating in the cellular phone band, the lowest power density limit is calculated using the lowest frequency: 824 MHz / 1500 = 0.55 mW/cm^2 (FCC) 824 MHz / 150 = 5.5 W/m^2 (IC). FIXED LIMITS For operation in the PCS band, the 2.4 GHz band and the 5 GHz bands: From FCC §1.1310 Table 1 (B), the maximum value of S = 1.0 mW/cm^2 From IC Safety Code 6, Section 2.2 Table 5 Column 4, S = 10 W/m^2 INDUSTRY CANADA EXEMPTION RSS-102 Clause 2.5.2 RF exposure evaluation is required if the separation distance between the user and the device’s radiating element is greater than 20 cm, except when the device operates as follows: •below 1.5 GHz and the maximum e.i.r.p. of the device is equal to or less than 2.5 W; •at or above 1.5 GHz and the maximum e.i.r.p. of the device is equal to or less than 5 W. Page 10 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 6. RF EXPOSURE RESULTS In the table(s) below, Power and Gain are entered in units of dBm and dBi respectively and conversions to linear forms are used for the calculations. Individual Transmitter Analysis Band (GHz) 2.4 2.4 2.4 5.2 5.2 5.8 5.8 Mode BT WLAN WLAN WLAN WLAN WLAN WLAN Transm itter Chain 1 0 1 0 1 0 1 Separation (cm ) 20 20 20 20 20 20 20 Distance Output Pow er (dBm ) 7.59 20.38 20.68 8.26 12.03 19.53 23.61 Antenna Gain (dBi) 3.60 4.40 3.60 4.40 3.60 4.40 3.6 Manufacture's (dBm ) 1.50 1.50 1.50 1.50 1.50 1.50 1.50 Tolerance Duty Cycle (%) 100 100 100 100 100 100 100 Source Based (m W) 18.6 424.6 378.4 26.1 51.6 349.1 743.0 EIRP FCC Pow er (m W/cm ^2) 0.004 0.085 0.075 0.005 0.010 0.069 0.15 Density FCC Pow er (m W/cm ^2) 1 1 1 1 1 1 1 Density Lim it IC Pow er (W/m ^2) 0.037 0.845 0.753 0.052 0.103 0.695 1.479 Density IC Pow er (W/m ^2) 10 10 10 10 10 10 10 Density Lim it Fraction of (%) 0.37 8.45 7.53 0.52 1.03 6.95 14.8 Lim it Sum of Fractions (%) 23.6 of active transm itters The device operates above 1.5 GHz with a maximum EIRP less than or equal to 5 Watts as a mobile device with a minimum separation distance of 20 cm, therefore it is exempt from routine RF Exposure Evaluation under RSS-102. To determine the worst case WLAN mode relative to the power density limits for rf exposure:  The fraction of the limit for BT 2.4 GHz 1x mode is 0.37 %  The fraction of the limit for WLAN 2.4 GHz 1x mode is 8.45 %  The fraction of the limit for WLAN 5 GHz worst case 1x mode is 14.8 % Worst case fraction is 23.6%. Page 11 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.

REPORT NO: 14U17400-6A DATE: June 10, 2014 FCC ID: A4R-W2 IC: 10395A-W2 Multiple chain or colocated transmitters Band (GHz) 2.4 2.4 5.2 5.8 Mode BT WLAN WLAN WLAN Transm itter Chain 1 1+2 1+2 1+2 Separation (cm ) 20 20 20 20 Distance Output Pow er (dBm ) 7.59 24.09 18.49 25.05 Antenna Gain (dBi) 3.60 4.40 4.40 4.40 Manufacture's (dBm ) 1.50 1.50 1.50 1.50 Tolerance Duty Cycle (%) 100 100 100 100 Source Based (m W) 18.6 997.7 274.8 1244.5 EIRP FCC Pow er (m W/cm ^2) 0.004 0.199 0.055 0.248 Density FCC Pow er (m W/cm ^2) 1 1 1 1 Density Lim it IC Pow er (W/m ^2) 0.037 1.986 0.547 2.477 Density IC Pow er (W/m ^2) 10 10 10 10 Density Lim it Fraction of Lim it (%) 0.37 19.86 5.47 24.77 Sum of Fractions (%) of 45.0 active transm itters Collocated transmitters that can operate simultaneously are BT+2.4WLAN + 5.8WLAN The total contribution of the power density for each transmitter, as a fraction of the rf exposure limit for each transmitter, is 0.37% + 19.86% + 24.77%= 45%. As the sum of the fractions is less than or equal to one (less than or equal to 100%) the device complies with the rf exposure limits for fixed use. The manufacturer configures output power so that the maximum power, after accounting for manufacturing tolerances, will never exceed the maximum power level measured. END OF REPORT Page 12 of 12 UL VERIFICATION SERVICES INC. FORM NO: CCSUP4701I 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of . UL Verification Services Inc.


Document Created: 2018-08-13 00:16:48
Document Modified: 2018-08-13 00:16:48
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC