[Report]FCC(EMF)_A18NA-357_LG Innotek Co., Ltd._TWFD-S001T

FCC ID: YZP-TWFDS001T

RF Exposure Info

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FCCID_4302482

Page 1 of 7 Report No. : OT-18D-RWD-016 ELECTROMAGNETIC EMISSION COMPLIANCE REPORT FOR LOW-POWER, NON-LICENSED TRANSMITTER Test Report No. : OT-18D-RWD-016 AGR No. : A18NA-357 Applicant : LG Innotek Co., Ltd. Address : 26, Hanamsandan 5beon-ro, Gwangsan-gu,Gwangju, 62229, Korea Manufacturer : PT. LG innotek Indonesia Address : Bekasi International Industrial Estate, Block C8 No.12&12A Desa Cibatu, Cikarang Selatan, Bekasi 17750, Indonesia Type of Equipment : WiSA usb Wireless Audio Dongle FCC ID. : YZP-TWFDS001T Model Name : TWFD-S001T Serial number : N/A Total page of Report : 7 pages (including this page) Date of Incoming : November 28, 2018 Date of issue : December 10, 2018 SUMMARY The equipment complies with the regulation; FCC PART 15 SUBPART E Section 15.407 This test report only contains the result of a single test of the sample supplied for the examination. It is not a generally valid assessment of the features of the respective products of the mass-production. Reviewed by: Approved by: Ki-Hong, Nam / Chief Engineer Keun-Young, Choi / Vice President ONETECH Corp. ONETECH Corp. It should not be reproduced except in full, without the written approval of ONETECH Corp. EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599)

onETECH Ns Page 2 of 7 Report No. : OT—18D—RWD—016 CONTENTS PAGE 1. VERIFICATION OF COMPLIANCE 4 2. GENERAL INFORMATION 5 2.1 PRODUCT DESCRIPTION....22.22.00000 0000000000 en en eneenvennenee en nnennennennennennennennennennennennennennennennennennennennennennennennennennennennennennennen 5 2.2 ALTERNATIVE TYPE(S/MODEL(S); ALSO COVERED BY THIS TEST REPORT. ................00.0000000000000e00en0eneenmenmenmenmenmnmnee. 5 3. EUT MODIFICATIONS 5 4. MAXIMUM PERMISSIBLE EXPOSURE 6 4.1 RF EXPOSURE CALCULATION ... ....6 4.2 EUT DESCRIPTION.................. 4.3 CALCULATED MPE SAFE DISTANCE:::.00.00.00.0000000000000e0ee0eenenr en enrenrenrenrenrenrenrenrenrenrenrene en en en en en en en en en en en en enennenncene 7 It should not be reproduced except in full, withoutthe written approval of ONETECH Corp. EMC—003 (Rev.2) ONETECH Corp.; 43—14, Jinsaegol—gil, Chowol—cup, Gwangju—si, Gyeonggi—do, 12735, Korea (TEL: 82—31—799—9500, FAX: 82—31—799—9599)

Page 3 of 7 Report No. : OT-18D-RWD-016 Revision History Rev. No. Issue Report No. Issued Date Revisions Section Affected 0 OT-18D-RWD-016 2018.12.10 Initial Release All It should not be reproduced except in full, without the written approval of ONETECH Corp. EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599)

Page 4 of 7 Report No. : OT-18D-RWD-016 1. VERIFICATION OF COMPLIANCE Applicant : LG Innotek Co., Ltd. Address : 26, Hanamsandan 5beon-ro, Gwangsan-gu,Gwangju, 62229, Korea Contact Person : Inchang Jeong / Chief Research Engineer Telephone No. : +82-10-2326-9972 FCC ID : YZP-TWFDS001T Model Name : TWFD-S001T Brand Name : LG Innotek Serial Number : N/A Date : December 10, 2018 EQUIPMENT CLASS Unlicensed National Information infrastructure(UNII) E.U.T. DESCRIPTION WiSA usb Wireless Audio Dongle THIS REPORT CONCERNS Original Grant MEASUREMENT PROCEDURES ANSI C63.10: 2013 TYPE OF EQUIPMENT TESTED Pre-Production KIND OF EQUIPMENT Certification AUTHORIZATION REQUESTED EQUIPMENT WILL BE OPERATED FCC PART 15 SUBPART E Section 15.407 UNDER FCC RULES PART(S) KDB 789033 D02 General UNII Test Procedures New Rules V02r01 Modifications on the Equipment to None Achieve Compliance Final Test was Conducted On 3 m, Semi Anechoic Chamber -. The above equipment was tested by ONETECH Corp. for compliance with the requirement set forth in the FCC Rules and Regulations. This said equipment in the configuration described in this report, shows the maximum emission levels emanating from equipment are within the compliance requirements. It should not be reproduced except in full, without the written approval of ONETECH Corp. EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599)

Page 5 of 7 Report No. : OT-18D-RWD-016 2. GENERAL INFORMATION 2.1 Product Description The LG Innotek Co., Ltd., Model TWFD-S001T (referred to as the EUT in this report) is a WiSA usb Wireless Audio Dongle. The product specification described herein was obtained from product data sheet or user’s manual. DEVICE TYPE WiSA usb Wireless Audio Dongle Temperature Range 0 °C ~ 50 °C 5 150 MHz ~ 5 250 MHz Band 5 180 MHz ~ 5 240 MHz OPERATING 5 250 MHz ~ 5 350 MHz Band 5 260 MHz ~ 5 320 MHz FREQUENCY 5 470 MHz ~ 5 725 MHz Band 5 500 MHz ~ 5 700 MHz 5 725 MHz ~ 5 850 MHz Band 5 745 MHz ~ 5 825 MHz MODULATION WLAN 5 GHz OFDM Modulation(BPSK/QPSK/16QAM/64QAM) TYPE 5 150 MHz ~ 5 250 MHz Band 4.84 dBm(802.11a) RF OUTPUT 5 250 MHz ~ 5 350 MHz Band 5.02 dBm(802.11a) POWER 5 470 MHz ~ 5 725 MHz Band 5.41 dBm(802.11a) 5 725 MHz ~ 5 850 MHz Band 5.61 dBm(802.11a) MODULATION WLAN 5 G OFDM Modulation(BPSK/QPSK/16QAM/64QAM) TYPE ANTENNA TYPE PCB Antenna 5 150 MHz ~ 5 250 MHz Band 0.97 dBi 5 250 MHz ~ 5 350 MHz Band 0.91 dBi ANTENNA GAIN 5 470 MHz ~ 5 725 MHz Band 1.44 dBi 5 725 MHz ~ 5 850 MHz Band 1.56 dBi List of each Osc. or crystal 40 MHz Freq.(Freq. >= 1 MHz) 2.2 Alternative type(s)/model(s); also covered by this test report. -. None 3. EUT MODIFICATIONS -. None It should not be reproduced except in full, without the written approval of ONETECH Corp. EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599)

Page 6 of 7 Report No. : OT-18D-RWD-016 4. MAXIMUM PERMISSIBLE EXPOSURE 4.1 RF Exposure Calculation According to the FCC rule 1.1310 table 1B, the limit for the maximum permissible RF exposure for an uncontrolled environment are f/1500 mW/cm² for the frequency range between 300 MHz and 1 500 MHz and 1.0 mW/cm² for the frequency range between 1 500 MHz and 100 000 MHz. The electric field generated for a 1 mW/cm² exposure is calculated as follows: E = √ (30 * P * G) / d, and S = E² / Z = E² / 377, because 1 mW/cm² = 10 W/m² Where S = Power density in mW/cm², Z = Impedance of free space, 377 Ω E = Electric filed strength in V/m, G = Numeric antenna gain, and d = distance in meter Combing equations and rearranging the terms to express the distance as a function of the remaining variable d = √ (30 * P * G) / (377 *10 S) Changing to units of mW and cm, using P (mW) = P (W) / 1 000, d (cm) = 0.01 * d (m) d = 0.282 * √ (P * G) / S Where d = distance in cm, P = Power in mW, G = Numeric antenna gain, and S = Power density in mW/cm² 4.2 EUT Description Kind of EUT WiSA usb Wireless Audio Dongle □ Portable (< 20 cm separation) Device Category □ Mobile (> 20 cm separation) ■ Others ■ MPE Exposure □ SAR Evaluation Applied □ N/A It should not be reproduced except in full, without the written approval of ONETECH Corp. EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599)

Page 7 of 7 Report No. : OT-18D-RWD-016 4.3 Calculated MPE Safe Distance According to above equation, the following result was obtained. Power Target Power Max tune up Operating Antenna Gain Safe Density Limit W/tolerance power Freq. Band Operating Mode Distance (mW/cm²) (mW/ (MHz) (cm) @ 20 cm cm²) (dBm) (dBm) (mW) Log Linear Separation 5 150 802.11a 5.0 ± 0.5 5.50 3.55 0.97 1.25 0.59 0.000 9 1.00 ~ 5 250 5 250 802.11a 5.0 ± 0.5 5.50 3.55 0.91 1.23 0.59 0.000 9 1.00 ~ 5 350 5 470 802.11a 5.5 ± 0.5 6.00 3.98 1.44 1.39 0.66 0.001 1 1.00 ~ 5 725 5 725 802.11a 5.5 ± 0.5 6.00 3.98 1.56 1.43 0.67 0.001 1 1.00 ~ 5 850 According to above table, for 5 725 ~ 5 850 MHz Band, safe distance, D = 0.282 * √ (3.98 * 1.43)/1.00 = 0.67 cm. For getting power density at 20 cm separation in above table, following formula was used. S = P * G / (4 * R²) = 3.98 * 1.43 / (4 * 3.14 * 20^2) = 0.001 1 Where: S = Power Density, P = Power input to the external antenna (Output power from the EUT antenna port (dBm) – cable loss (dB)), G = Gain of Transmit Antenna (linear gain), R = Distance from Transmitting Antenna Tested by: Hyung-Kwon, Oh / Assistant Manager It should not be reproduced except in full, without the written approval of ONETECH Corp. EMC-003 (Rev.2) ONETECH Corp.: 43-14, Jinsaegol-gil, Chowol-eup, Gwangju-si, Gyeonggi-do, 12735, Korea (TEL: 82-31-799-9500, FAX: 82-31-799-9599)


Document Created: 2019-06-01 20:56:25
Document Modified: 2019-06-01 20:56:25
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