Test report BLE-r2

FCC ID: 2AC23-WT31M2311A

Test Report

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FCCID_3266031

AATL aclive Testing Lab Model: WT31M2311A FCC Part 15C Measurement and Test Report For Hui Zhou Gaoshengda Technology Co.,LTD NO.75 Zhongkai Development Area, Huizhou, Guangdong, China FCC ID: :2AC23— WT3LIM2311IA FCC Rule(s): Part Product Description: WIFI Module Tested Model: WT31M231 1A Report No.: FCGC—ATL20161118886—4 Issued Date: 2016—12—09 ~ m A Tested By: Si feifei / Engingeer 5 i +2A ALA 1 1 Reviewed By: Xie Lingling / EMC Manager Xhe fi-fi‘?/f?“‘} J Approved & Authorized By: Prepared By: Jandy So / PSQ Manager uty Shenzhen ATL Testing Technology Co., Ltd. F/4, Building 10, Dayuan Industrial Zone, Xili Town, Nanshan District, Shenzhen, China (518055) Tel.: +86—0755—26909822 Fax.: +86—0755—61605504 Website: www.atllab.org Note: This report shall not be reproduced except in full, without the written approval of Shenzhen ATL Testing Technology Co., Ltd.. This document may be altered or revised by Shenzhen ATL Testing Technology Co., Ltd. personnel only, and shall be noted in the revision section of the document. The test results in the report only apply to the tested sample REPORT NO.: FCC—ATL20161118886—4 PAGE 1 OF 33 FCC PART 15.247

Model: WT31M2311A TABLE OF CONTENTS 1. GENERAL INFORMATION ...................................................................................................................................3 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ...............................................................................3 1.2 TEST STANDARDS...................................................................................................................................................4 1.3 TEST METHODOLOGY .............................................................................................................................................4 1.4 EUT SETUP AND TEST MODE .................................................................................................................................4 1.5 TEST EQUIPMENT LIST AND DETAILS .....................................................................................................................5 2. SUMMARY OF TEST RESULTS ...........................................................................................................................6 3. RF EXPOSURE .........................................................................................................................................................7 3.1 STANDARD APPLICABLE.........................................................................................................................................7 3.2 TEST RESULT..........................................................................................................................................................7 4. ANTENNA REQUIREMENT ..................................................................................................................................8 4.1 STANDARD APPLICABLE.........................................................................................................................................8 4.2 EVALUATION INFORMATION ..................................................................................................................................8 5. POWER SPECTRAL DENSITY .............................................................................................................................9 5.1 STANDARD APPLICABLE.........................................................................................................................................9 5.2 TEST PROCEDURE ...................................................................................................................................................9 5.3 ENVIRONMENTAL CONDITIONS ..............................................................................................................................9 5.4 SUMMARY OF TEST RESULTS/PLOTS ......................................................................................................................9 6. 6DB BANDWIDTH .................................................................................................................................................12 6.1 STANDARD APPLICABLE.......................................................................................................................................12 6.2 TEST PROCEDURE .................................................................................................................................................12 6.3 ENVIRONMENTAL CONDITIONS ............................................................................................................................12 6.4 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................12 7. RF OUTPUT POWER ............................................................................................................................................15 7.1 STANDARD APPLICABLE.......................................................................................................................................15 7.2 TEST PROCEDURE .................................................................................................................................................15 7.3 TEST SETUP ..........................................................................................................................................................15 7.4 ENVIRONMENTAL CONDITIONS ............................................................................................................................15 7.5 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................16 8. FIELD STRENGTH OF SPURIOUS EMISSIONS .............................................................................................17 8.1 STANDARD APPLICABLE.......................................................................................................................................17 8.2 TEST PROCEDURE .................................................................................................................................................17 8.3 CORRECTED AMPLITUDE & MARGIN CALCULATION ............................................................................................18 8.4 ENVIRONMENTAL CONDITIONS ............................................................................................................................18 8.5 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................19 9. OUT OF BAND EMISSIONS .................................................................................................................................26 9.1 STANDARD APPLICABLE.......................................................................................................................................26 9.2 TEST PROCEDURE .................................................................................................................................................26 9.3 ENVIRONMENTAL CONDITIONS ............................................................................................................................27 9.4 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................27 10. CONDUCTED EMISSIONS ................................................................................................................................30 10.1 TEST PROCEDURE ...............................................................................................................................................30 10.2 BASIC TEST SETUP BLOCK DIAGRAM .................................................................................................................30 10.3 ENVIRONMENTAL CONDITIONS ..........................................................................................................................30 10.4 TEST RECEIVER SETUP .......................................................................................................................................31 10.5 SUMMARY OF TEST RESULTS/PLOTS ..................................................................................................................31 10.6 CONDUCTED EMISSIONS TEST DATA ..................................................................................................................31 REPORT NO.: FCC-ATL20161118886-4 PAGE 2 OF 33 FCC PART 15.247

Model: WT31M2311A 1. GENERAL INFORMATION 1.1 Product Description for Equipment Under Test (EUT) Client Information Applicant: Hui Zhou Gaoshengda Technology Co.,LTD Address of applicant: NO.75 Zhongkai Development Area, Huizhou, Guangdong, China Manufacturer: Hui Zhou Gaoshengda Technology Co.,LTD Address of manufacturer: NO.75 Zhongkai Development Area, Huizhou, Guangdong, China General Description of EUT Product Name: WIFI Module Brand Name: GSD Model No.: WT31M2311A Adding Model(s): / Note: The test data is gathered from a production sample provided by the manufacturer. Technical Characteristics of EUT Bluetooth Version: V4.1 (BLE mode) Frequency Range: 2402-2480MHz RF Output Power: -3.1dBm (Conducted) Data Rate: 25Mbps Modulation: GFSK Quantity of Channels: 40 Channel Separation: 2MHz Type of Antenna: PIFA Antenna Antenna Gain: 3 dBm REPORT NO.: FCC-ATL20161118886-4 PAGE 3 OF 33 FCC PART 15.247

Model: WT31M2311A 1.2 Test Standards The following report is prepared on behalf of the Hui Zhou Gaoshengda Technology Co.,LTD in accordance with FCC Part 15, Subpart C, and section 15.203, 15.205, 15.207, 15.209 and 15.247 of the Federal Communication Commissions rules. The objective is to determine compliance with FCC Part 15, Subpart C, and section 15.203, 15.205, 15.207, 15.209 and 15.247 of the Federal Communication Commissions rules. Maintenance of compliance is the responsibility of the manufacturer. Any modification of the product, which result in lowering the emission, should be checked to ensure compliance has been maintained. 1.3 Test Methodology All measurements contained in this report were conducted with ANSI C63.10-2013, American National Standard for Testing Unlicensed Wireless Devices, and ANSI C63.4-2014, American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the range of 9 kHz to 40 GHz. The measurement guide KDB 558074 D01 v03r05 for digital transmission systems shall be performed also. 1.4 EUT Setup and Test Mode The EUT was operated in the engineering mode to fix the Tx frequency that was for the purpose of the measurements. All testing shall be performed under maximum output power condition, and to measure its highest possible emissions level, more detailed description as follows: Test Mode List Test Mode Description Remark TM1 GFSK(BLE) 2402MHz, 2442MHz, 2480MHz EUT Cable List and Details Cable Description Length (m) Shielded/Unshielded With / Without Ferrite / / / / Special Cable List and Details Cable Description Length (m) Shielded/Unshielded With / Without Ferrite USB Cable 1.0 Shielded Without Core Auxiliary Equipment List and Details Description Manufacturer Model Serial Number Notebook Lenovo T410 / REPORT NO.: FCC-ATL20161118886-4 PAGE 4 OF 33 FCC PART 15.247

Model: WT31M2311A 1.5 Test Equipment List and Details Description Manufacturer Model Serial No. Cal Date Due Date Spectrum Analyzer Agilent E4407B MY41440400 2016-06-04 2017-06-03 Spectrum Analyzer Rohde & Schwarz FSP30 836079/035 2016-06-04 2017-06-03 EMI Test Receiver Rohde & Schwarz ESVB 825471/005 2016-06-04 2017-06-03 Amplifier Agilent 8447F 3113A06717 2016-06-04 2017-06-03 Amplifier C&D PAP-1G18 2002 2016-06-04 2017-06-03 Broadband Antenna Schwarz beck VULB9163 9163-333 2016-06-04 2017-06-03 Horn Antenna ETS 3117 00086197 2016-06-04 2017-06-03 Horn Antenna ETS 3116B 00088203 2016-06-04 2017-06-03 Loop Antenna Schwarz beck FMZB 1516 9773 2016-06-04 2017-06-03 EMI Test Receiver Rohde & Schwarz ESPI 101611 2016-06-04 2017-06-03 L.I.S.N Schwarz beck NSLK8126 8126-224 2016-06-04 2017-06-03 Pulse Limiter Rohde & Schwarz ESH3-Z2 100911 2016-06-04 2017-06-03 Power Sensor Anritsu MA2411B 1126022 2016-11-18 2017-11-17 Power Meter Anritsu ML2495A 1135009 2016-11-18 2017-11-17 REPORT NO.: FCC-ATL20161118886-4 PAGE 5 OF 33 FCC PART 15.247

AATL aclive Testing Lab Model: WT31M2311A 2. SUMMARY OF TEST RESULTS FCC Rules Description of Test Item Result §2.1093 RF Exposure Compliant §15.203; §15.247(b)(4)(G) Antenna Requirement Compliant §15.205 Restricted Band of Operation Compliant §15.207(a) Conducted Emission Compliant §15.247(e) Power Spectral Density Compliant §15.247(a)(2) 6 dB Bandwidth Compliant §15.247(b)(3) RF Output Power Compliant §15.209(a) Radiated Emission Compliant §15.247(d) Band Edge (Out of Band Emissions) Compliant N/A: not applicable REPORT NO.: FCC—ATL20161118886—4 PAGE 6 OF 33 FCC PART 15.247

AATL active testing ab Model: WT31M2311A 3. RF Exposure 3.1 Standard Applicable According to § 1.1307 and § 2.1093, the portable transmitter must comply the RF exposure requirements. 3.2 Test Result This product complied with the requirement of the RF exposure, please see the RF Exposure Report. REPORT NO.: FCC—ATL20161118886—4 PAGE 7 OF 33 FCC PART 15.247

Model: WT31M2311A 4. Antenna Requirement 4.1 Standard Applicable According to FCC Part 15.203, an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator shall be considered sufficient to comply with the provisions of this section. 4.2 Evaluation Information This product has a PCB antenna, fulfill the requirement of this section. REPORT NO.: FCC-ATL20161118886-4 PAGE 8 OF 33 FCC PART 15.247

AATL active testing ab Model: WT31M2311A 5. Power Spectral Density 5.1 Standard Applicable According to 15.247(a)(1)(iii), For digitally modulated systems, the power spectral density conducted from the intentional radiator to the antenna shall not be greater than 8 dBm in any 3 kHz band during any time interval of continuous transmission. 5.2 Test Procedure According to the KDB 558074 DO1 v03r05, the test method of power spectral density as below: a) Set analyzer center frequency to DTS channel center frequency. b) Set the span to 1.5 times the DTS bandwidth. c) Set the RBW to: 3 kHz < RBW < 100 kHz. d) Set the VBW > 3 X RBW. e) Detector = peak. f) Sweep time = auto couple. g) Trace mode = max hold. h) Allow trace to fully stabilize. i) Use the peak marker function to determine the maximum amplitude level within the RBW. j) If measured value exceeds limit, reduce RBW (no less than 3 kHz) and repeat. 5.3 Environmental Conditions Temperature: 26° C Relative Humidity: 54% ATM Pressure: 1011 mbar 5.4 Summary of Test Results/Plots Test Channel Power Spectral Density Limit Test Mode MHz dBm/3kHz dBm/3kHz 2402 —17.176 8 GFSK(BLE) 2442 —17.20 8 2480 —16.25 8 Please refer to the following test plots: REPORT NO.: FCC—ATL20161118886—4 PAGE 9 OF 33 FCC PART 15.247

Model: WT31M2311A Low Channel Middle Channel REPORT NO.: FCC-ATL20161118886-4 PAGE 10 OF 33 FCC PART 15.247

Model: WT31M2311A High Channel REPORT NO.: FCC-ATL20161118886-4 PAGE 11 OF 33 FCC PART 15.247

AATL aclive Testing Lab Model: WT31M2311A 6. 6dB Bandwidth 6.1 Standard Applicable According to 15.247(a)(2). Systems using digital modulation techniques may operate in the 902—928 MHz, 2400—2483.5 MHz, and 5725—5850 MHz bands. The minimum 6 dB bandwidth shall be at least 500 kHz. 6.2 Test Procedure a) Set RBW = 100 kHz. b) Set the video bandwidth (VBW) >z 3 X RBW. c) Detector = Peak. d) Trace mode = max hold. e) Sweep = auto couple. f) Allow the trace to stabilize. g) Measure the maximum width of the emission that is constrained by the frequencies associated with the two outermost amplitude points (upper and lower frequencies) that are attenuated by 6 dB relative to the maximum level measured in the fundamental emission. 6.3 Environmental Conditions Temperature: 25° C Relative Humidity: 53% ATM Pressure: 1018 mbar 6.4 Summary of Test Results/Plots Test Channel 6 dB Bandwidth 99% Bandwidth Limit Test Mode MHz kHz kHz kHz 2402 693.892 1057.1 >500 GFSK(BLE) 2442 691.147 1056.3 >500 2480 691.219 1064.4 >500 Please refer to the following test plots: REPORT NO.: FCC—ATL20161118886—4 PAGE 12 OF 33 FCC PART 15.247

Model: WT31M2311A For BLE Low Channel: Middle Channel: REPORT NO.: FCC-ATL20161118886-4 PAGE 13 OF 33 FCC PART 15.247

Model: WT31M2311A High Channel: REPORT NO.: FCC-ATL20161118886-4 PAGE 14 OF 33 FCC PART 15.247

Model: WT31M2311A 7. RF Output Power 7.1 Standard Applicable According to 15.247(b)(3). For systems using digital modulation in the 902–928 MHz, 2400–2483.5 MHz, and 5725–5850 MHz bands: 1 Watt. 7.2 Test Procedure The tests below are run with the EUT’s transmitter set at high power in TX mode. The EUT is needed to force selection of output power level and channel number. While testing, EUT was set to transmit continuously. Remove the Subjective device’s antenna and connect the RF output port to power sensor. 7.3 Test Setup EUT Power Power Sensor Meter 7.4 Environmental Conditions Temperature: 26 C Relative Humidity: 57 ATM Pressure: 1011 mbar REPORT NO.: FCC-ATL20161118886-4 PAGE 15 OF 33 FCC PART 15.247

Model: WT31M2311A 7.5 Summary of Test Results/Plots Frequency Reading Output Power Limit Test Mode MHz dBm mW mW 2402 -3.1 0.49 1000 GFSK(BLE) 2442 -4.0 0.4 1000 2480 -3.7 0.42 1000 Note: the antenna gain of 0dBi less than 6dBi maximum permission antenna gain value based on 1 watt peak output power limit. REPORT NO.: FCC-ATL20161118886-4 PAGE 16 OF 33 FCC PART 15.247

Model: WT31M2311A 8. Field Strength of Spurious Emissions 8.1 Standard Applicable According to §15.247(d), in any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement, provided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter complies with the conducted power limits based on the use of RMS averaging over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in §15.209(a) is not required. In addition, radiated emissions which fall in the restricted bands, as defined in §15.205(a), must also comply with the radiated emission limits specified in §15.209(a). The emission limit in this paragraph is based on measurement instrumentation employing an average detector. The provisions in §15.35 for limiting peak emissions apply. Spurious Radiated Emissions measurements starting below or at the lowest crystal frequency. 8.2 Test Procedure The setup of EUT is according with per ANSI C63.4-2014 measurement procedure. The specification used was with the FCC Part 15.205 15.247(a) and FCC Part 15.209 Limit. The external I/O cables were draped along the test table and formed a bundle 30 to 40 cm long in the middle. The spacing between the peripherals was 10 cm. REPORT NO.: FCC-ATL20161118886-4 PAGE 17 OF 33 FCC PART 15.247

Model: WT31M2311A Antenna Tower 1m-4m 3m EUT SYS 1.5m Turntable Table To EMI Receiver Ground Plane Frequency :9kHz-30MHz Frequency :30MHz-1GHz Frequency :Above 1GHz RBW=10KHz, RBW=120KHz, RBW=1MHz, VBW =30KHz VBW=300KHz VBW=3MHz(Peak), 10Hz(AV) Sweep time= Auto Sweep time= Auto Sweep time= Auto Trace = max hold Trace = max hold Trace = max hold Detector function = peak Detector function = peak, QP Detector function = peak, AV 8.3 Corrected Amplitude & Margin Calculation The Corrected Amplitude is calculated by adding the Antenna Factor and the Cable Factor, and subtracting the Amplifier Gain from the Amplitude reading. The basic equation is as follows: Corr. Ampl. = Indicated Reading + Ant. Factor + Cable Loss – Ampl. Gain The “Margin” column of the following data tables indicates the degree of compliance with the applicable limit. For example, a margin of -6dBV means the emission is 6dBV below the maximum limit. The equation for margin calculation is as follows: Margin = Corr. Ampl. – FCC Part 15 Limit 8.4 Environmental Conditions Temperature: 25 C Relative Humidity: 52 ATM Pressure: 1012 mbar REPORT NO.: FCC-ATL20161118886-4 PAGE 18 OF 33 FCC PART 15.247

AATL aclive Testing Lab Model: WT31M2311A 8.5 Summary of Test Results/Plots According to the data below, the FCC Part 15.205, 15.209 and 15.247 standards, and had the worst cases: Note: this EUT was tested in 3 orthogonal positions and the worst case position data was reported. Plot of Radiated Emissions Test Data EUT: 7.85" Tablet PC FIXO F1 Tested Model: F1 Operating Condition: Transmitting—Low channel (2402MHz) Comment: DC 3.7V Li—ion Battery Test Specification: Horizontal 80.0 dBu¥/m Timit1 : 30.000 40 50 60 70 80 300 400 500 600 700 1000.0 MHz No. Frequency Reading Correct Result Limit Margin Degree Height Remark (MHz) (dBuV/m) dB/m (dBuV/im) (dBuV/m) (dB) (*) (cm) 1 120.2766 27.02 5.91 32.93 43.50 —10.57 360 100 peak 2 200.6881 30.14 6.560 36.74 43.50 —6.76 0 200 peak 3 281.0075 28.36 9.53 37.89 46.00 —8.11 360 200 peak REPORT NO.: FCC—ATL20161118886—4 PAGE 19 OF 33 FCC PART 15.247

AATL aclive Testing Lab Model: WT31M2311A Test Specification: Vertical 80.0 dBu¥/m limit1 : — 70 20 50 40 30 20 100|b bhosdeds on hn en en en n en n en en en en ce n en en en en en en fe ns en n en n den en en n penn en nh ce en fennefenefe es oooe M ho ne n dnb dn dn hn en en n n n en en n en dsn en en en en en en e d en n en pe n en cesc fenen dnc d e ~20.0 i 1O i i 1DO P P P 30.000 40 50 60 300 400 500 600 700 1000.0 MHz No. Frequency Reading Correct Result Limit Margin Degree Height Remark (MHz) (dBuV/m) dB/m (dBuV/m) (dBuV/m) (dB) ( °*) ({cm) 1 39.9942 24.79 8.14 32.93 40.00 —7.07 360 100 peak 2 119.4361 25.83 6.04 31.87 43.50 —11.63 0 200 peak 3 200.6881 27 46 6.60 34.06 43.50 —9.44 0 200 peak REPORT NO.: FCC—ATL20161118886—4 PAGE 20 OF 33 FCC PART 15.247

AATL active testing ab Model: WT31M2311A Plot of Radiated Emissions Test Data EUT: 7.85" Tablet PC FIXO F1 Tested Model: Fl Operating Condition: Transmitting—Low channel (2442MHz) Comment: DC 3.7V Li—ion Battery Test Specification: Horizontal 80.0 dBu¥/m limit1 : — 30.000 40 50 60 70 80 300 400 500 600 700 1000.0 MHz No. Frequency Reading Correct Result Limit Margin Degree Height Remark (MHz) (dBuV/m) dB/m (dBuV/im) (dBuV/m) (dB) (*) (cm) 1 120.2766 28.02 5.91 33.93 43.50 —9.57 360 200 peak 2 200.6880 29.64 6.560 36.24 43.50 —7.26 0 300 peak 3 260.1444 29.87 8.95 38.82 46.00 —7.18 0 200 peak 4 401.8385 27.28 11.40 38.68 46.00 —7.32 360 200 peak REPORT NO.: FCC—ATL20161118886—4 PAGE 21 OF 33 FCC PART 15.247

AATL neve resingiah Model: WT31M2311A Test Specification: Vertical 80.0 dBu¥/m limit1 : — 70 60 50 40 30 20 10 0 10 20. ; 1O P P P ; ; ; DO O P P 30.000 40 50 60 70 80 300 400 500 600 700 1000.0 MHz No. Frequency Reading Correct Result Limit Margin Degree Height Remark (MHz) (dBuV/m) dB/m (dBuV/m) (dBuV/m) (dB) (°*) (cm) 1 39.9941 25.53 8.14 33.67 40.00 —6.33 360 200 peak 2 120.2766 28.28 5.91 34.19 43.50 —9.31 0 100 peak 3 200.6880 28.96 6.560 35.56 43.50 —7.94 360 200 peak REPORT NO.: FCC—ATL20161118886—4 PAGE 22 OF 33 FCC PART 15.247

AATL active testing ab Model: WT31M2311A Plot of Radiated Emissions Test Data EUT: 7.85" Tablet PC FIXO F1 Tested Model: Fl Operating Condition: Transmitting—Low channel (2480MHz) Comment: DC 3.7V Li—ion Battery Test Specification: Horizontal 80.0 dBu¥/m limit1 : 30.000 40 50 60 70 80 300 400 500 600 700 1000.0 MHz No. Frequency Reading Correct Result Limit Margin Degree Height Remark (MHz) (dBuV/m) dB/m (dBuV/m) (dBuV/m) (dB) (°) {cm) 1 120.2766 25.13 5.91 31.04 43.50 —12.46 360 200 peak 2 160.3456 28. 42 4.55 32.97 43.50 —10.53 360 100 peak 3 200.6880 28.64 6.560 35.24 43.50 —8.26 0 200 peak 4 299.3158 28.17 9.77 37.94 46.00 —8.06 0 200 peak REPORT NO.: FCC—ATL20161118886—4 PAGE 23 OF 33 FCC PART 15.247

AATL aclive Testing Lab Model: WT31M2311A Test Specification: Vertical 80.0 dBu¥/m limit1 : — 70 60 50 40 30 20 1O Je encb mm en dn nfen nhun en dsn sn nnnnnn esn nnnnnnnen dsn en nennnne n fennnnnnendens en se dennne ce aseedee e duecduss o flsc csscb cssb d dsb P d o d c db cs M hennn n f en n hn n n dn f en hn fe n en n n n n en n en n en en dn en n en n n n en fe n en en ce n d en n en en d en n n ce en n d en enb d es 20. ; DO P P P ; ; DO O P P 30.000 40 50 60 70 80 300 400 500 600 700 1000.0 MHz No. Frequency Reading Correct Result Limit Margin Degree Height Remark (MHz) (dBuV/m) dB/m (dBuV/m) (dBuV/m) (dB) (*) {cm) 1 39.9941 23.53 8.14 31.67 40.00 —8.33 360 200 peak 2 120.2766 26.51 5.91 32. 42 43.50 —11.08 0 200 peak 3 199.2855 26.93 6.58 33.51 43.50 —9.99 360 200 peak REPORT NO.: FCC—ATL20161118886—4 PAGE 24 OF 33 FCC PART 15.247

AATL aclive Testing Lab Model: WT31M2311A Spurious Emissions Above 1GHz Transmitting: BLE mode: Frequency Reading Correct Result Limit Margin Polar Detector (MHz) (dBuV/m) dB (dBuV/m) (dBuV/m) (dB) WV Low Channel—2402MHz 4804 61.43 —3.59 57.84 74 —16.16 H PK 4804 50.23 —3.59 46.64 54 —7.36 H AV 7206 59.26 —0.52 58.74 74 —15.26 H PK 7206 44.25 —0.52 43.73 54 —10.27 H AV 4804 59.16 —3.59 55.57 74 —18.43 V PK 4804 48.13 —3.59 44.54 54 —9.46 V AV 7206 60.11 —0.52 59.59 74 —14.41 V PK 7206 44.15 —0.52 43.63 54 —10.37 V AV Middle Channel—2441MHz 4882 58.25 —3.49 54.176 74 —19.24 H PK 4882 47.15 —3.49 43.66 54 —10.34 H AV 7323 58.26 —0.47 57.19 74 —16.21 H PK 7323 43.15 —0.47 42.68 54 —11.32 H AV 4882 60.25 —3.49 56.176 74 —17.24 V PK 4882 49.14 —3.49 45.65 54 —8.35 V AV 7323 60.13 —0.47 59.66 74 —14.34 V PK 7323 45.16 —0.47 44.69 54 —9.31 V AV High Channel—2480MHz 4960 64.28 —3.41 60.87 74 —13.13 H PK 4960 49.56 —3.41 46.15 54 —7.85 H AV 7440 53.46 —0.42 53.04 74 —20.96 H PK 7440 44.17 —0.42 43.75 54 —10.25 H AV 4960 57.69 —3.41 54.28 74 —19.72 V PK 4960 44.53 —3.41 41.12 54 —12.88 V AV 7440 59.12 —0.42 58.170 74 —15.30 V PK 7440 43.95 —0.42 43.53 54 —10.47 V AV Note: Testing is carried out with frequency rang 9kHz to the tenth harmonics, other than listed in the table above are attenuated more than 20dB below the permissible limits or the field strength is too small to be measured. REPORT NO.: FCC—ATL20161118886—4 PAGE 25 OF 33 FCC PART 15.247

Model: WT31M2311A 9. Out of Band Emissions 9.1 Standard Applicable According to §15.247 (d) In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement, provided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter complies with the conducted power limits based on the use of RMS averaging over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in §15.209(a) is not required. In addition, radiated emissions which fall in the restricted bands, as defined in §15.205(a), must also comply with the radiated emission limits specified in §15.209(a). 9.2 Test Procedure According to the KDB 558074 D01 v03r05, the band-edge radiated test method as follows: Set span = wide enough to capture the peak level of the emission operating on the channel closest to the bandedge, as well as any modulation products which fall outside of the authorized band of operation (2310MHz to 2420MHz for low bandedge, 2460MHz to 2500MHz for the high bandedge) RBW = 1MHz, VBW = 1MHz for peak value measured RBW = 1MHz, VBW = 10Hz for average value measured Sweep = auto; Detector function = peak/average; Trace = max hold All the trace to stabilize, set the marker on the emission at the bandedge, or on the highest modulation product outside of the band, if this level is greater than that at the bandedge. Enable the marker-delta function, then use the marker-to-peak function to move the marker to the peak of the in-band emission. Those emission must comply with the 15.209 limit for fall in the restricted bands listed in section 15.205. Note that the method of measurement KDB publication number: 913591 may be used for the radiated bandedge measurements. According to the KDB 558074 D01 v03r05, the conducted spurious emissions test method as follows: 1. Set start frequency to DTS channel edge frequency. 2. Set stop frequency so as to encompass the spectrum to be examined. 3. Set RBW = 100 kHz. 4. Set VBW ≥ 300 kHz. 5. Detector = peak. 6. Trace Mode = max hold. 7. Sweep = auto couple. 8. Allow the trace to stabilize (this may take some time, depending on the extent of the span). 9. Use peak marker function to determine maximum amplitude of all unwanted emissions within any 100 kHz bandwidth. Ensure that the amplitude of all unwanted emissions outside of the authorized frequency band (excluding restricted frequency bands) are attenuated by at least the minimum requirements specified in section 8.1. Report the three highest emissions relative to the limit. REPORT NO.: FCC-ATL20161118886-4 PAGE 26 OF 33 FCC PART 15.247

Model: WT31M2311A 9.3 Environmental Conditions Temperature: 23C Relative Humidity: 54 ATM Pressure: 1011 mbar 9.4 Summary of Test Results/Plots Bandedge (Radiated) Lowest Bandedge-BLE Horizontal (Worst case) No. Frequency Reading Correct Result Limit Margin Remark Factor (MHz) (dBuV) (dB/m) (dBuV/m) (dBuV/m) (dB) 1 2387.990 57.10 -0.34 56.76 74.00 -17.24 peak 2 2387.990 32.90 -0.34 32.56 54.00 -21.44 AVG 3 2390.000 58.37 -0.34 58.03 74.00 -15.97 peak 4 2390.000 33.42 -0.34 33.08 54.00 -20.92 AVG REPORT NO.: FCC-ATL20161118886-4 PAGE 27 OF 33 FCC PART 15.247

Model: WT31M2311A Highest Bandedge-BLE Horizontal (Worst case) No. Frequency Reading Correct Result Limit Margin Remark Factor (MHz) (dBuV) (dB/m) (dBuV/m) (dBuV/m) (dB) 1 2483.500 61.21 0.03 61.24 74.00 -12.76 peak 2 2483.500 33.23 0.03 33.26 54.00 -20.74 AVG 3 2484.820 62.47 0.04 62.51 74.00 -11.49 peak 4 2484.820 33.82 0.04 33.86 54.00 -20.14 AVG REPORT NO.: FCC-ATL20161118886-4 PAGE 28 OF 33 FCC PART 15.247

Model: WT31M2311A Bandedge (Conducted) Lowest Highest REPORT NO.: FCC-ATL20161118886-4 PAGE 29 OF 33 FCC PART 15.247

Model: WT31M2311A 10. Conducted Emissions 10.1 Test Procedure The setup of EUT is according with per ANSI C63.4-2014 measurement procedure. The specification used was with the FCC Part 15.207 Limit. The external I/O cables were draped along the test table and formed a bundle 30 to 40 cm long in the middle. The spacing between the peripherals was 10 cm. 10.2 Basic Test Setup Block Diagram EUT Notebook LISN 1.0 m 1.5 To Receiver Non-conduction table Meter 80 cm above Ground Plane 1. 5 m 10.3 Environmental Conditions Temperature: 25 C Relative Humidity: 52 ATM Pressure: 1012 mbar REPORT NO.: FCC-ATL20161118886-4 PAGE 30 OF 33 FCC PART 15.247

Model: WT31M2311A 10.4 Test Receiver Setup During the conducted emission test, the test receiver was set with the following configurations: Start Frequency .......................................................................... 150 kHz Stop Frequency........................................................................... 30 MHz Sweep Speed .............................................................................. Auto IF Bandwidth.............................................................................. 10 kHz Quasi-Peak Adapter Bandwidth ................................................. 9 kHz Quasi-Peak Adapter Mode ......................................................... Normal 10.5 Summary of Test Results/Plots According to the data in section 10.6, the EUT complied with the FCC Part 15.207 Conducted margin for this device, with the worst margin reading of: -14.65 dB at 0.8980 MHz in the Neutral, Peak detector, 0.15-30MHz 10.6 Conducted Emissions Test Data REPORT NO.: FCC-ATL20161118886-4 PAGE 31 OF 33 FCC PART 15.247

Model: WT31M2311A Plot of Conducted Emissions Test Data EUT: WIFI Module Tested Model: WT31M2311A Operating Condition: Transmitting Comment: AC 120V/60Hz; Connected to PC Test Specification: Neutral No. Frequency Reading Correct Result Limit Margin Detector (MHz) (dBuV) (dB/m) (dBuV) (dBuV) (dB) 1* 0.8980 31.69 9.66 41.35 56.00 -14.65 peak 2 0.9020 17.88 9.66 27.54 46.00 -18.46 AVG 3 9.0019 17.70 10.34 28.04 50.00 -21.96 AVG 4 11.2539 33.79 10.37 44.16 60.00 -15.84 peak 5 17.5299 33.26 10.44 43.70 60.00 -16.30 peak 6 17.5299 14.45 10.44 24.89 50.00 -25.11 AVG REPORT NO.: FCC-ATL20161118886-4 PAGE 32 OF 33 FCC PART 15.247

Model: WT31M2311A Test Specification: Line No. Frequency Reading Correct Result Limit Margin Detector (MHz) (dBuV) (dB/m) (dBuV) (dBuV) (dB) 1 0.3500 16.62 9.50 26.12 48.96 -22.84 AVG 2 0.4700 30.17 9.54 39.71 56.51 -16.80 peak 3 0.7700 30.39 9.62 40.01 56.00 -15.99 peak 4* 0.7780 16.66 9.63 26.29 46.00 -19.71 AVG 5 10.3539 34.84 10.36 45.20 60.00 -14.80 peak 6 10.8019 15.37 10.37 25.74 50.00 -24.26 AVG ***** END OF REPORT ***** REPORT NO.: FCC-ATL20161118886-4 PAGE 33 OF 33 FCC PART 15.247


Document Created: 2017-01-20 22:02:26
Document Modified: 2017-01-20 22:02:26
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