RF Exposure Info (MPE) rev 2

FCC ID: A4RH2A

RF Exposure Info

Download: PDF
FCCID_4255958

RF Exposure Report Report No.: SA181217C36 R1 FCC ID: A4RH2A Model Name: H2A Received Date: Dec. 17, 2018 Date of Evaluation: Mar. 21, 2019 Issued Date: Apr. 11, 2019 Applicant: Google LLC Address: 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA Issued By: Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch Lab Address: No. 47-2, 14th Ling, Chia Pau Vil., Lin Kou Dist., New Taipei City, Taiwan, R.O.C. Test Location: No. 19, Hwa Ya 2nd Rd, Wen Hwa Vil, Kwei Shan Dist., Taoyuan City 33383, Taiwan (R.O.C) FCC Registration / 788550 / TW0003 Designation Number: This report is for your exclusive use. Any copying or replication of this report to or for any other person or entity, or use of our name or trademark, is permitted only with our prior written permission. This report sets forth our findings solely with respect to the test samples identified herein. The results set forth in this report are not indicative or representative of the quality or characteristics of the lot from which a test sample was taken or any similar or identical product unless specifically and expressly noted. Our report includes all of the tests requested by you and the results thereof based upon the information that you provided to us. You have 60 days from date of issuance of this report to notify us of any material error or omission caused by our negligence, provided, however, that such notice shall be in writing and shall specifically address the issue you wish to raise. A failure to raise such issue within the prescribed time shall constitute your unqualified acceptance of the completeness of this report, the tests conducted and the correctness of the report contents. Unless specific mention, the uncertainty of measurement has been explicitly taken into account to declare the compliance or non-compliance to the specification. The report must not be used by the client to claim product certification, approval, or endorsement by TAF or any government agencies. Report No.: SA181217C36 R1 Page No. 1 / 6 Report Format Version: 6.1.1 Cancels and replaces the report no.: SA181217C36 dated on Mar. 22, 2019

Table of Contents Release Control Record .................................................................................................................................. 3 1 Certificate of Conformity ...................................................................................................................... 4 2 RF Exposure .......................................................................................................................................... 5 2.1 Limits for Maximum Permissible Exposure (MPE) .............................................................................. 5 2.2 MPE Calculation Formula ................................................................................................................... 5 2.3 Classification ....................................................................................................................................... 5 2.4 Antenna Gain ...................................................................................................................................... 5 2.5 Calculation Result of Maximum Conducted Power ............................................................................. 6 Report No.: SA181217C36 R1 Page No. 2 / 6 Report Format Version: 6.1.1 Cancels and replaces the report no.: SA181217C36 dated on Mar. 22, 2019

Release Control Record Issue No. Description Date Issued SA181217C36 Original Release Mar. 22, 2019 SA181217C36 R1 Added H/W, S/W and revised WLAN 2.4G Max power Apr. 11, 2019 Report No.: SA181217C36 R1 Page No. 3 / 6 Report Format Version: 6.1.1 Cancels and replaces the report no.: SA181217C36 dated on Mar. 22, 2019

1 Certificate of Conformity Product: Interactive Video Streaming Device Test Model: H2A Sample Status: Engineering Sample Applicant: Google LLC HW Version: EVT SW Version: 173539 Date of Evaluation: Mar. 21, 2019 Standards: FCC Part 2 (Section 2.1091) KDB 447498 D01 General RF Exposure Guidance v06 IEEE C95.1-1992 The above equipment has been tested by Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch, and found compliance with the requirement of the above standards. The test record, data evaluation & Equipment Under Test (EUT) configurations represented herein are true and accurate accounts of the measurements of the sample’s RF characteristics under the conditions specified in this report. Prepared by : , Date: Apr. 11, 2019 Gina Liu / Specialist Approved by : , Date: Apr. 11, 2019 Dylan Chiou / Project Engineer Report No.: SA181217C36 R1 Page No. 4 / 6 Report Format Version: 6.1.1 Cancels and replaces the report no.: SA181217C36 dated on Mar. 22, 2019

2 RF Exposure 2.1 Limits for Maximum Permissible Exposure (MPE) Frequency Range Electric Field Magnetic Field Power Density Average Time (MHz) Strength (V/m) Strength (A/m) (mW/cm2) (minutes) Limits For General Population / Uncontrolled Exposure 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f2)* 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 2.2 MPE Calculation Formula Pd = (Pout*G) / (4*pi*r2) where Pd = power density in mW/cm 2 Pout = output power to antenna in mW G = gain of antenna in linear scale pi = 3.1416 r = distance between observation point and center of the radiator in cm 2.3 Classification The antenna of this product, under normal use condition, is at least 20cm away from the body of the user. So, this device is classified as Mobile Device. 2.4 Antenna Gain Antenna Type Antenna Gain (dBi) 2.4 G WLAN / BT 5G WLAN Thread PIFA 1.7 5.0 2.2 Report No.: SA181217C36 R1 Page No. 5 / 6 Report Format Version: 6.1.1 Cancels and replaces the report no.: SA181217C36 dated on Mar. 22, 2019

2.5 Calculation Result of Maximum Conducted Power Frequency Band Max Power Antenna Gain Distance Power Density Limit Band (MHz) (dBm) (dBi) (cm) (mW/cm2) (mW/cm2) 2412-2472 20.0 1.7 20 0.029 1.00 5180-5240 17.0 5.0 20 0.032 1.00 WLAN 5260-5320 19.0 5.0 20 0.050 1.00 5500-5720 19.0 5.0 20 0.050 1.00 5745-5825 19.0 5.0 20 0.050 1.00 BT 2402-2480 9.0 1.7 20 0.002 1.00 Thread 2405-2475 20.5 2.2 20 0.037 1.00 Conclusion: The formula of calculated the MPE is: CPD1 / LPD1 + CPD2 / LPD2 + ……etc. < 1 CPD = Calculation power density LPD = Limit of power density WLAN 2.4GHz + Thread = 0.029/1 + 0.037/1 = 0.066 WLAN 5GHz + Thread = 0.050/1 + 0.037/1 = 0.087 BT + Thread = 0.002/1 + 0.037/1 = 0.039 WLAN 5GHz + BT + Thread = 0.050/1 + 0.002/1 + 0.037/1 = 0.089 Therefore the maximum calculations of above situations are less than the “1” limit. --- END --- Report No.: SA181217C36 R1 Page No. 6 / 6 Report Format Version: 6.1.1 Cancels and replaces the report no.: SA181217C36 dated on Mar. 22, 2019


Document Created: 2019-05-07 13:10:09
Document Modified: 2019-05-07 13:10:09
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC