MPE

FCC ID: 2AABM-FS252

RF Exposure Info

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FCCID_4052362

Shenzhen Huaxia Testing Technology Co., Ltd 1F., Block A of Tongsheng Technology Building, Huahui Road, Dalang Street, Longhua District, Shenzhen, China ‘all Telephone: +86—755—26648640 1E R )6E :W Fax: Website: +86—755—26648637 www.cga—cert.com Report Template Version: VO3 Report Template Revision Date: Mar.1st, 2017 RF Exposure Evaluation Report Report No. : CQASZ20180700090E—03 Applicant: TECH—AUDIO CO., LTD Address of Applicant: NO.3, TungShih li, Ping Cheng Tao Yuan, Taiwan. Manufacturer: Atlantic Technology Address of Manufacturer: 343 Vanderbilt Avenue, Norwood, MA 02062—5060 Factory: Xiamen Tech—Sound CO.,Ltd Address of Factory: NO.170, Ji Yin Road, Tong An District, Xiamen, China. Equipment Under Test (EUT): Product: Wireless Bookshelf Speaker Model No.: FS—252 Brand Name: N/A FCC ID: 2AABM—FS252 Standards: 47 CFR Part 1.1307 47 CFR Part 1.1310 KDB447498D01 General RF Exposure Guidance v0O6 Date of Test: 2018—07—31 to 2018—09—20 Date of Issue: 2018—09—20 Test Result : PASS® Tested By: ( Martin Lee) Reviewed By: ( Jack Ai) Approved By: ( Jack Ai) * In the contiguration tested, the EUT complied with the standards specified above. The test report is effective only with both signature and specialized stamp, The result(s) shown in this report refer only to the sample(s) tested. Without written approval of CQA, this report can‘t be reproduced except in full

Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20180700090E-03 2 Version Revision History Of Report Report No. Version Description Issue Date CQASZ20180700090E-03 Rev.01 Initial report 2018-09-20 Page:2 of 7

Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20180700090E-03 3 Contents Page 1 COVER PAGE .............................................................................................................................................................1 2 VERSION .....................................................................................................................................................................2 3 CONTENTS .................................................................................................................................................................3 4 GENERAL INFORMATION .......................................................................................................................................4 4.1 CLIENT INFORMATION................................................................................................................................................4 4.2 GENERAL DESCRIPTION OF EUT ................................................................................................................................4 4.3 GENERAL DESCRIPTION OF BT ..................................................................................................................................4 4.4 GENERAL DESCRIPTION OF SKAA .............................................................................................................................4 5 RF EXPOSURE EVALUATION ................................................................................................................................5 5.1 RF EXPOSURE COMPLIANCE REQUIREMENT ..............................................................................................................5 5.1.1 Limits ..............................................................................................................................................................5 5.1.2 Test Procedure ..............................................................................................................................................5 5.2 1.1.3 EUT RF EXPOSURE EVALUATION ....................................................................................................................6 Page:3 of 7

Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20180700090E-03 4 General Information 4.1 Client Information Applicant: TECH-AUDIO CO., LTD Address of Applicant: NO.3, TungShih li, Ping Cheng Tao Yuan, Taiwan. Manufacturer: Atlantic Technology Address of Manufacturer: 343 Vanderbilt Avenue, Norwood, MA 02062-5060 Factory: Xiamen Tech-Sound CO., Ltd Address of Factory: NO.170, Ji Yin Road, Tong An District, Xiamen, China. 4.2 General Description of EUT Product Name: Wireless Bookshelf Speaker Model No.: FS-252 Trade Mark: N/A Hardware Version: V01B Software Version: V4.0 Sample Type: portable production Power Supply: 120V/60Hz 4.3 General Description of BT Operation Frequency: 2402MHz~2480MHz Bluetooth Version: V4.0 Modulation Technique: Frequency Hopping Spread Spectrum(FHSS) Modulation Type: GFSK, π/4DQPSK, 8DPSK Number of Channel: 79 Hopping Channel Type: Adaptive Frequency Hopping systems Test Software of EUT: Blue test 3 (manufacturer declare ) Antenna Type: PCB antenna Antenna Gain: 4.0dBi 4.4 General Description of SKAA Operation Frequency: 2403.5MHz~2477.3MHz Modulation Technique: Frequency Hopping Spread Spectrum(FHSS) Modulation Type: FSK Number of Channel: 49 Hopping Channel Type: Adaptive Frequency Hopping systems Sample Type: Mobile production Test Software of EUT: SKAA (manufacturer declare ) Antenna Type: Integral antenna Antenna Gain: 3.3dBi Page:4 of 7

Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20180700090E-03 5 RF Exposure Evaluation 5.1 RF Exposure Compliance Requirement 5.1.1 Limits According to FCC Part1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in part1.1307(b) F= Frequency in MHz Friis Formula 2 Friis transmission formula: Pd = (Pout*G)/(4* Pi * R ) Where Pd = power density in mW/cm2 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 Pd id the limit of MPE, 1 mW/cm2 . If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. 5.1.2 Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually. Page:5 of 7

Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20180700090E-03 5.2 1.1.3 EUT RF Exposure Evaluation 1) For BT Antenna Gain: 4dBi Antenna Gain: The maximum Gain measured in fully anechoic chamber is 2.51 in linear scale. Output Power Into Antenna & RF Exposure Evaluation Distance: Measurement Data GFSK mode Tune up tolerance Maximum tune-up Power Test channel Peak Output Power (dBm) (dBm) (dBm) (mW) Lowest(2402MHz) 2.10 2±1 3.0 1.995 Middle(2441MHz) 2.84 2±1 3.0 1.995 Highest(2480MHz) 3.06 2.5±1 3.5 2.239 π/4DQPSK mode Tune up tolerance Maximum tune-up Power Test channel Peak Output Power (dBm) (dBm) (dBm) (mW) Lowest(2402MHz) -0.67 0±1 1.0 1.259 Middle(2441MHz) 0.22 0±1 1.0 1.259 Highest(2480MHz) 0.41 0±1 1.0 1.259 8DPSK mode Tune up tolerance Maximum tune-up Power Test channel Peak Output Power (dBm) (dBm) (mW) (dBm) Lowest(2402MHz) 0.00 0±1 1.0 1.259 Middle(2441MHz) 0.71 0±1 1.0 1.259 Highest(2480MHz) 0.89 0±1 1.0 1.259 The worst case: Maximum tune-up Antenna Power Limit Result Power Gain Density (mW) (dBi) at R = 20 cm 2 (mW/cm ) 2.239 4 0.001 1.0 PASS Note: 1) Refer to report No. CQASZ20180500081E-01 for EUT test Max Conducted Peak Output Power value. 2 2 2) Pd = (Pout*G)/(4* Pi * R )=(2.239*2.51)/(4*3.1416*20 )=0.001 Page:6 of 7

COA 1E BR )E i Shenzhen Huaxia Testing Technology Co., Ltd Report No.: CQASZ20180700090E—03 2) For SKAA Antenna Gain: 3.3dBi Antenna Gain: The maximum Gain measured in fully anechoic chamber is 2.14 in linear scale. Output Power Into Antenna & RF Exposure Evaluation Distance: Measurement Data GESK mode Test channel Peak Output Power Tune up tolerance Maximum tune—up Power (dBm) (dBm) (dBm) ({mW) Lowest(2403.5MHz) 11.59 1141 12 15.849 Middle(2438.9MHz) 11.15 1141 12 15.849 Highest(2477.3MHz) 11.43 1141 12 15.849 The worst case: Maximum tune—up Antenna Power Limit Result Power Gain Density {mW) (dBi) at R = 20 cm (mW/iem") 15.849 3.3 0.007 1.0 PASS Note: 1) Refer to report No. CQASZ20180500081E—02. for EUT test Max Conducted Peak Qutput Power value. 2) Pd = (Pout*G)/{4* Pi * R")=(15.849*2.14)/(4*3.1416*20"}=0.007 2) For SKAA+BT if SKAA and BT transmitters can be transmitted at the same time BT SKAA BT+SKAA Limit Result Power Power Power Density Density Density at R = 20 cm at R = 20 cm at R = 20 cm (mW/icm*) ({mW/em") (mW/iem") 0.001 0.007 0.008 1.0 PASS Page:7 of 7


Document Created: 2018-10-25 15:30:15
Document Modified: 2018-10-25 15:30:15
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