SHENZHEN WEIKING TECHNOLOGY CO.,LTD X20 Q8W-X20 Q8WX20 x20
Shenzhen CTL Testing Technology Co., Ltd. Tel: +86-755-89486194 E-mail: ctl@ctl-lab.com TEST REPORT FCC PART 15.247 Report Reference No.: CTL2403197022-WF Compiled by: ( position+printed name+signature) Happy Guo (File administrators) Tested by: ( position+printed name+signature) Wuqiang Wu (Test Engineer) Approved by: ( position+printed name+signature) Ivan Xie (Manager) Product Name................................. : Bluetooth Speaker Model/Type reference....................: X20 List Model(s)....................................: BT420 Trade Mark....................................... : W-KING FCC ID............................................... : Q8W-X20 Applicant's name........................... : SHENZHEN WEIKING TECHNOLOGY CO.,LTD FuCheng Street,Zhangge Community,ZhangGe Address of applicant.....................: Road,No.142 ,Building 1,Room 301 Shenzhen Longhua Guangdong 518109 China Test Firm...........................................: Shenzhen CTL Testing Technology Co., Ltd. Address of Test Firm.....................: Floor 1-A, Baisha Technology Park, No.3011, Shahexi Road, Nanshan District, Shenzhen, China 518055 Test specification...........................: Standard............................................ : FCC Part 15.247: Operation within the bands 902-928 MHz, 2400-2483.5 MHz and 5725-5850 MHz. TRF Originator.................................. : Shenzhen CTL Testing Technology Co., Ltd. Master TRF....................................... : Dated 2011-01 Date of receipt of test item.......... : Mar. 21, 2024 Date of Test Date............................ : Mar. 21, 2024-Apr. 11, 2024 Date of Issue....................................: Apr. 15, 2024 Result................................................ : Pass Shenzhen CTL Testing Technology Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen CTL Testing Technology Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen CTL Testing Technology Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. V1.0 Test Report No. : Page 2 of 41 Report No.: CTL2403197022-WF TEST REPORT CTL2403197022-WF Apr. 15, 2024 Date of issue Equipment under Test : Bluetooth Speaker Sample No : CTL2403197022 Model /Type : X20 Listed Models : BT420 Applicant Address Manufacturer Address : SHENZHEN WEIKING TECHNOLOGY CO.,LTD : FuCheng Street,Zhangge Community,ZhangGe Road,No.142 ,Building 1,Room 301 Shenzhen Longhua Guangdong 518109 China : SHENZHEN WEIKING TECHNOLOGY CO.,LTD : FuCheng Street,Zhangge Community,ZhangGe Road,No.142 ,Building 1,Room 301 Shenzhen Longhua Guangdong 518109 China Test result Pass * *In the configuration tested, the EUT complied with the standards specified page 5. The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the issuing testing laboratory. V1.0 Page 3 of 41 Report No.: CTL2403197022-WF Revisions Version 1.0 ** Modified History ** Description Issued Data Initial Test Report Release 2024-04-15 Report No. CTL2403197022-WF Remark Tracy Qi V1.0 Page 4 of 41 Report No.: CTL2403197022-WF Table of Contents Page 1. SUMMARY .......................................................................................................................................................................5 1.1. TEST STANDARDS ............................................................................................................................................................ 5 1.2. TEST DESCRIPTION ...............................................................................................................................................................5 1.3. TEST FACILITY ..................................................................................................................................................................... 6 1.4. STATEMENT OF THE MEASUREMENT UNCERTAINTY ..................................................................................................................... 6 2. GENERAL INFORMATION .................................................................................................................................................8 2.1. ENVIRONMENTAL CONDITIONS ............................................................................................................................................... 8 2.2. GENERAL DESCRIPTION OF EUT .............................................................................................................................................8 2.3. DESCRIPTION OF TEST MODES AND TEST FREQUENCY ................................................................................................................9 2.4. EQUIPMENTS USED DURING THE TEST ...................................................................................................................................10 2.5. RELATED SUBMITTAL(S) / GRANT (S) .................................................................................................................................... 11 2.6. MODIFICATIONS ................................................................................................................................................................ 11 3. TEST CONDITIONS AND RESULTS ...................................................................................................................................12 3.1. CONDUCTED EMISSIONS TEST ..............................................................................................................................................12 3.2. RADIATED EMISSIONS AND BAND EDGE .................................................................................................................................15 3.3. MAXIMUM PEAK OUTPUT POWER ....................................................................................................................................... 25 3.4. 20DB BANDWIDTH ............................................................................................................................................................26 3.5. FREQUENCY SEPARATION .................................................................................................................................................... 27 3.6. NUMBER OF HOPPING FREQUENCY ....................................................................................................................................... 28 3.7. TIME OF OCCUPANCY (DWELL TIME) .................................................................................................................................... 29 3.8. OUT-OF-BAND EMISSIONS .................................................................................................................................................. 30 3.9. PSEUDORANDOM FREQUENCY HOPPING SEQUENCE ................................................................................................................ 31 3.10. ANTENNA REQUIREMENT ..................................................................................................................................................32 4. TEST SETUP PHOTOS OF THE EUT .................................................................................................................................. 33 5. PHOTOS OF THE EUT ..................................................................................................................................................... 35 V1.0 Page 5 of 41 Report No.: CTL2403197022-WF 1. SUMMARY 1.1. TEST STANDARDS The tests were performed according to following standards: FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems that are in operation within the bands of 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz ANSI C63.10: 2013: American National Standard for Testing Unlicensed Wireless Devices KDB 558074 D01 v05r02: KDB558074 D01 15.247 Meas Guidance v05r02 1.2. Test Description FCC PART 15.247 FCC Part 15.207 FCC Part 15.247(a)(1)(i) FCC Part 15.247(d) FCC Part 15.247(b) FCC Part 15.247(a) FCC Part 15.247(a)(1)(iii) FCC Part 15.247(a)(1) FCC Part 15.205/15.209 FCC Part 15.247(d) FCC Part 15.203/15.247 (b) AC Power Conducted Emission 20dB Bandwidth Spurious RF Conducted Emission Maximum Peak Output Power Pseudorandom Frequency Hopping Sequence Number of hopping frequency& Time of Occupancy Frequency Separation Radiated Emissions Band Edge Compliance of RF Emission Antenna Requirement PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS V1.0 Page 6 of 41 Report No.: CTL2403197022-WF 1.3. Test Facility 1.3.1 Address of the test laboratory Shenzhen CTL Testing Technology Co.,Ltd. Floor 1-A, Baisha Technology Park, No.3011, Shahexi Road, Nanshan District, Shenzhen, China 518055 There is one 3m semi-anechoic chamber and two line conducted labs for final test. The Test Sites meet the requirements in documents ANSI C63.10 and CISPR 32/EN 55032 requirements. 1.3.2 Laboratory accreditation The test facility is recognized, certified, or accredited by the following organizations: CNAS-Lab Code: L7497 Shenzhen CTL Testing Technology Co., Ltd. has been assessed and proved to be in compliance with CNAS-CL01 Accreditation Criteria for Testing and Calibration Laboratories (identical to ISO/IEC 17025: 2017 General Requirements) for the Competence of Testing and Calibration Laboratories. A2LA-Lab Cert. No. 4343.01 Shenzhen CTL Testing Technology Co., Ltd, EMC Laboratory has been accredited by A2LA for technical competence in the field of electrical testing, and proved to be in compliance with ISO/IEC 17025: 2017 General Requirements for the Competence of Testing and Calibration Laboratories and any additional program requirements in the identified field of testing. IC Registration No.: 9618B CAB identifier: CN0041 The 3m alternate test site of Shenzhen CTL Testing Technology Co., Ltd. EMC Laboratory has been registered by Innovation, Science and Economic Development Canada to test to Canadian radio equipment requirements with Registration No.: 9618B. FCC-Registration No.: 399832 Designation No.: CN1216 Shenzhen CTL Testing Technology Co., Ltd. EMC Laboratory has been registered and fully described in a report filed with the (FCC) Federal Communications Commission. The acceptance letter from the FCC is maintained in our files. Registration 399832. 1.4. Statement of the measurement uncertainty The data and results referenced in this document are true and accurate. The reader is cautioned that there may be errors within the calibration limits of the equipment and facilities. The measurement uncertainty was calculated for all measurements listed in this test report acc. to CISPR 16 - 4 "Specification for radio disturbance and immunity measuring apparatus and methods Part 4: Uncertainty in EMC Measurements" and is documented in the Shenzhen CTL Testing Technology Co., Ltd. quality system acc. to DIN EN ISO/IEC 17025. Furthermore, component and process variability of devices similar to that tested may result in additional deviation. The manufacturer has the sole responsibility of continued compliance of the device. Hereafter the best measurement capability for CTL laboratory is reported: Test Measurement Uncertainty Notes Transmitter power Radiated ±2.20dB (1) Radiated Emission9KHz~30MHz ±3.66dB (1) Radiated Emission 30~1000MHz ±4.10dB (1) Radiated Emission Above 1GHz ±4.32dB (1) 20dB Emission Bandwidth ±1.9% (1) V1.0 Page 7 of 41 Report No.: CTL2403197022-WF Carrier Frequency Separation ±1.9% (1) Maximum Power Spectral Density Level ±0.98 dB (1) Number of Hopping Channel ±1.9% (1) Time of Occupancy ±0.11% (1) Max Peak Conducted Output Power ±0.98 dB (1) Band-edge Spurious Emission ±1.21dB (1) Conducted RF Spurious Emission 9kHz-7GHz:±1.09dB (1) 7GHz-26.5GHz: ±3.27dB (1) This uncertainty represents an expanded uncertainty expressed at approximately the 95% confidence level using a coverage factor of k=1.96. V1.0 Page 8 of 41 Report No.: CTL2403197022-WF 2. GENERAL INFORMATION 2.1. Environmental conditions During the measurement the environmental conditions were within the listed ranges: Normal Temperature: 25°C Relative Humidity: 55 % Air Pressure: 101 kPa 2.2. General Description of EUT Product Name: Bluetooth Speaker Model/Type reference: X20 Power supply: DC 11.1V from battery Bluetooth: Version: Supported BR/EDR Modulation: GFSK, /4DQPSK, 8DPSK Operation frequency: 2402MHz to 2480MHz Channel number: 79 Channel separation: 1MHz Antenna type: PCB Antenna Antenna gain: 0dBi Note1: For more details, please refer to the user's manual of the EUT. Note2: Antenna gain provided by the applicant. V1.0 Page 9 of 41 Report No.: CTL2403197022-WF 2.3. Description of Test Modes and Test Frequency The Applicant provides communication tools software to control the EUT for staying in continuous transmitting (Duty Cycle more than 98%) and receiving mode for testing .There are 79 channels provided to the EUT and Channel 00/39/78 were selected to test. Operation Frequency Channel 00 01 Frequency (MHz) 2402 2403 ... ... 38 2440 39 2441 40 2442 ... ... 77 2479 78 2480 Preliminary tests were performed in each mode and packet length of BT, and found worst case as bellow, finally test were conducted at those mode and recorded in this report. Test Items Conducted Emissions Radiated Emissions and Band Edge Maximum Conducted Output Power 20dB Bandwidth Frequency Separation Number of hopping frequency Time of Occupancy (Dwell Time) Out-of-band Emissions Worst case DH5 Middle channel DH5 DH5/2DH5/3DH5 DH5/2DH5/3DH5 DH5/2DH5/3DH5 Middle channel DH5/2DH5/3DH5 DH1/DH3/DH5 Middle channel 2DH1/2DH3/2DH5 Middle channel 3DH1/3DH3/3DH5 Middle channel DH5/2DH5/3DH5 V1.0 Page 10 of 41 Report No.: CTL2403197022-WF 2.4. Equipments Used during the Test Conducted Emission Item Test Equipment Manufacturer Model No. Serial No. EMI Test Receiver ROHDE & SCHWARZ ESCI 1166.5950.03 LISN ROHDE & SCHWARZ ESH2-Z5 860014/010 Limitator ROHDE & SCHWARZ ESH3-Z2 100408 Software: Name of Software: ES-K1 Last Cal. 2023/05/04 2023/05/04 2023/05/04 Version: V1.71 Cal.Due 2024/05/03 2024/05/03 2024/05/03 Radiated Emissions and Band Edge Test Equipment Manufacturer Model No. Active Loop Antenna Da Ze ZN30900A Serial No. / Calibration Date 2021/05/13 Double cone logarithmic antenna Horn Antenna Horn Antenna Amplifier Amplifier Schwarzbeck Sunol Sciences Corp. Ocean Microwave MRT-AP01M 06 Agilent VULB 9168 DRH-118 OBH1004 00 MRT 8449B 824 A062013 26999002 S-001 3008A02306 2023/02/13 2021/12/23 2021/12/22 2023/05/04 2023/05/04 Amplifier Brief&Smart LNA-4018 2104197 2023/05/05 EMI Test Receiver ROHDE & SCHWARZ ESCI 1166.5950.03 2023/05/04 Spectrum Analyzer RS FSP 1164.4391.38 2023/05/05 Test software Name of Software Version EZ_EMC(Below 1GHz) V1.1.4.2 EZ_EMC(Above 1GHz) V1.1.4.2 Calibration Due Date 2024/05/12 2026/02/12 2024/12/22 2024/12/21 2024/05/03 2024/05/03 2024/05/04 2024/05/03 2024/05/04 Maximum Peak Output Power & 20dB Bandwidth & Frequency Separation & Number of hopping frequency & Dwell Time & Out-of-band Emissions Test Equipment Manufacturer Model No. Serial No. Calibration Calibration Date Due Date Spectrum Analyzer Keysight N9020A MY53420874 2023/05/04 2024/05/03 Temperature/Humidity Meter Ji Yu MC501 / 2023/05/09 2024/05/08 Test Software V1.0 Page 11 of 41 Name of Software TST-PASS Report No.: CTL2403197022-WF Version V2.0 2.5. Related Submittal(s) / Grant (s) This submittal(s) (test report) is intended to comply with Section 15.247 of the FCC Part 15, Subpart C Rules. 2.6. Modifications No modifications were implemented to meet testing criteria. V1.0 Page 12 of 41 Report No.: CTL2403197022-WF 3. TEST CONDITIONS AND RESULTS 3.1. Conducted Emissions Test LIMIT FCC CFR Title 47 Part 15 Subpart C Section 15.207 Frequency range (MHz) 0.15-0.5 0.5-5 5-30 Limit (dBuV) Quasi-peak 66 to 56* 56 60 * Decreases with the logarithm of the frequency. Average 56 to 46* 46 50 TEST CONFIGURATION TEST PROCEDURE 1. The equipment was set up as per the test configuration to simulate typical actual usage per the user's manual. The EUT is a tabletop system; a wooden table with a height of 0.8 meters is used and is placed on the ground plane as per ANSI C63.10:2013. 2. Support equipment, if needed, was placed as per ANSI C63.10:2013. 3. All I/O cables were positioned to simulate typical actual usage as per ANSI C63.10:2013. 4. The adapter received AC120V/60Hz power through a Line Impedance Stabilization Network (LISN) which supplied power source and was grounded to the ground plane. 5. All support equipments received AC power from a second LISN, if any. 6. The EUT test program was started. Emissions were measured on each current carrying line of the EUT using a spectrum Analyzer / Receiver connected to the LISN powering the EUT. The LISN has two monitoring points: Line 1 (Hot Side) and Line 2 (Neutral Side). Two scans were taken: one with Line 1 connected to Analyzer / Receiver and Line 2 connected to a 50 ohm load; the second scan had Line 1 connected to a 50 ohm load and Line 2 connected to the Analyzer / Receiver. 7. Analyzer / Receiver scanned from 150 KHz to 30MHz for emissions in each of the test modes. 8. During the above scans, the emissions were maximized by cable manipulation. V1.0 Page 13 of 41 Report No.: CTL2403197022-WF TEST RESULTS Remark: All modes of GFSK, Pi/4 DQPSK, and 8DPSK were test at Low, Middle, and High channel; only the worst result of GFSK Low Channel was reported as below: Line: L V1.0 Line: Page 14 of 41 Report No.: CTL2403197022-WF N V1.0 Page 15 of 41 Report No.: CTL2403197022-WF 3.2. Radiated Emissions and Band Edge Limit For intentional device, according to § 15.209(a), the general requirement of field strength of radiated emission out of authorized band shall not exceed the following table at a 3 meters measurement distance. 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) Frequency (MHz) 0.009-0.49 0.49-1.705 1.705-30 30-88 88-216 216-960 Above 960 Radiated emission limits Distance (Meters) Radiated (dBV/m) 3 20log(2400/F(KHz))+40log(300/3) 3 20log(24000/F(KHz))+ 40log(30/3) 3 20log(30)+ 40log(30/3) 3 40.0 3 43.5 3 46.0 3 54.0 Radiated (V/m) 2400/F(KHz) 24000/F(KHz) 30 100 150 200 500 TEST CONFIGURATION (A) Radiated Emission Test Set-Up, Frequency Below 30MHz (B) Radiated Emission Test Set-Up, Frequency below 1000MHz V1.0 Page 16 of 41 Report No.: CTL2403197022-WF (C) Radiated Emission Test Set-Up, Frequency above 1000MHz Test Procedure 1. Below 1GHz measurement the EUT is placed on a turntable which is 0.8m above ground plane, and above 1GHz measurement EUT was placed on a low permittivity and low loss tangent turn table which is 1.5m above ground plane. 2. Maximum procedure was performed by raising the receiving antenna from 1m to 4m and rotating the turn table from 0 to 360 to acquire the highest emissions from EUT 3. And also, each emission was to be maximized by changing the polarization of receiving antenna both horizontal and vertical. 4. Repeat above procedures until all frequency measurements have been completed. 5. The EUT was pretested with 3 orientations placed on the table for the radiated emission measurement X, Y, and Z-plane. The X-plane results were found as the worst case and were shown in this report. TEST RESULTS Remark: 1. We measured Radiated Emission at GFSK, /4 DQPSK and 8DPSK mode from 9 KHz to 25GHz and recorded worst case at GFSK DH5 mode.. 2. For below 1GHz testing recorded worst at GFSK DH5 low channel. 3. Radiated emission test from 9 KHz to 10th harmonic of fundamental was verified, Found the emission level are attenuated 20dB below the limits from 9 kHz to 30MHz, so it does not recorded in report. V1.0 For 30MHz-1GHz Page 17 of 41 Horizontal Report No.: CTL2403197022-WF V1.0 Page 18 of 41 Vertical Report No.: CTL2403197022-WF V1.0 For 1GHz to 25GHz Page 19 of 41 Horizontal Report No.: CTL2403197022-WF V1.0 Page 20 of 41 Vertical Report No.: CTL2403197022-WF REMARKS: 1. 18GHz-26GHz not recorded for no spurious point have a margin of less than 6 dB with respect to the limits. 2. PK detector measurement value is lower than the average limit. Therefore, there is no need to test AV detector measurements. V1.0 Page 21 of 41 Report No.: CTL2403197022-WF Results of Band Edges Test (Radiated) NoteAll modulations have been tested, only worse case GFSK is reported. CH00 Horizontal V1.0 CH00 Page 22 of 41 Report No.: CTL2403197022-WF Vertical V1.0 CH78 Page 23 of 41 Report No.: CTL2403197022-WF Horizontal V1.0 CH78 Page 24 of 41 Report No.: CTL2403197022-WF Vertical V1.0 Page 25 of 41 Report No.: CTL2403197022-WF 3.3. Maximum Peak Output Power Limit For frequency hopping systems operating in the 2400-2483.5 MHz band employing at least 75 non-overlapping hopping channels: 1 watt. For all other frequency hopping systems in the 2400-2483.5 MHz band: 0.125 watts. Test Procedure Remove the antenna from the EUT and then connect a low loss RF cable from the antenna port to the spectrum. Test Configuration EUT SPECTRUM ANALYZER Test Results Raw data reference to Section 2 of document No. CTL2403197022-WF_Bluetooth_Appendix. V1.0 Page 26 of 41 Report No.: CTL2403197022-WF 3.4. 20dB Bandwidth Limit For frequency hopping systems operating in the 2400MHz-2483.5MHz no limit for 20dB bandwidth. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. The bandwidth of the fundamental frequency was measured by spectrum analyzer with 30 KHz RBW and 91 KHz VBW. The 20dB bandwidth is defined as the total spectrum the power of which is higher than peak power minus 20dB. Test Configuration EUT SPECTRUM ANALYZER Test Results Raw data reference to Section 1 of document No. CTL2403197022-WF_Bluetooth_Appendix. V1.0 Page 27 of 41 Report No.: CTL2403197022-WF 3.5. Frequency Separation LIMIT According to 15.247(a)(1),frequency hopping systems shall have hopping channel carrier frequencies separated by minimum of 25KHz or the 2/3*20dB bandwidth of the hopping channel, whichever is greater. TEST PROCEDURE The transmitter output was connected to the spectrum analyzer through an attenuator. The bandwidth of the fundamental frequency was measured by spectrum analyzer with300 KHz RBW and 300 KHz VBW. TEST CONFIGURATION EUT SPECTRUM ANALYZER TEST RESULTS Raw data reference to Section 3 of document No. CTL2403197022-WF_Bluetooth_Appendix. V1.0 Page 28 of 41 Report No.: CTL2403197022-WF 3.6. Number of hopping frequency Limit Frequency hopping systems in the 24002483.5 MHz band shall use at least 15 channels. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. Set spectrum analyzer start 2400MHz to 2483.5MHz with 300 KHz RBW and 300 KHz VBW. Test Configuration EUT SPECTRUM ANALYZER Test Results Raw data reference to Section 4 of document No. CTL2403197022-WF_Bluetooth_Appendix. V1.0 Page 29 of 41 Report No.: CTL2403197022-WF 3.7. Time of Occupancy (Dwell Time) Limit The average time of occupancy on any channel shall not be greater than 400 milliseconds within a period of 400 milliseconds multiplied by the number of hopping channels employed. Test Procedure The transmitter output was connected to the spectrum analyzer through an attenuator. Set center frequency of spectrum analyzer=operating frequency with 910 KHz RBW and 910 KHz VBW, Span 0Hz. Test Configuration EUT SPECTRUM ANALYZER Test Results Raw data reference to Section 5 of document No. CTL2403197022-WF_Bluetooth_Appendix. V1.0 Page 30 of 41 Report No.: CTL2403197022-WF 3.8. Out-of-band Emissions Limit 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 con-ducted or a radiated measurement, pro-vided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter com-plies 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. Test Procedure Connect the transmitter output to spectrum analyzer using a low loss RF cable, and set the spectrum analyzer to RBW=100 kHz, VBW= 300 kHz, peak detector , and max hold. Measurements utilizing these setting are made of the in-band reference level, bandedge and out-of-band emissions. Test Configuration EUT SPECTRUM ANALYZER Test Results Raw data reference to Section 6 of document No. CTL2403197022-WF_Bluetooth_Appendix. V1.0 Page 31 of 41 Report No.: CTL2403197022-WF 3.9. Pseudorandom Frequency Hopping Sequence TEST APPLICABLE For 47 CFR Part 15C section 15.247 (a) (1) requirement: Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hop-ping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 24002483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125 mW. The system shall hop to channel frequencies that are selected at the system hopping rate from a pseudo randomly ordered list of hopping frequencies. Each frequency must be used equally on the average by each transmitter. The system receivers shall have input bandwidths that match the hop-ping channel bandwidths of their corresponding transmitters and shall shift frequencies in synchronization with the transmitted signals. EUT Pseudorandom Frequency Hopping Sequence Requirement The pseudorandom frequency hopping sequence may be generated in a nice-stage shift register whose 5th and 9th stage outputs are added in a modulo-two addition stage. And the result is fed back to the input of the first stage. The sequence begins with the first one of 9 consecutive ones, for example: the shift register is initialized with nine ones. Number of shift register stages:9 Length of pseudo-random sequence:29-1=511 bits Longest sequence of zeros:8(non-inverted signal) An example of pseudorandom frequency hopping sequence as follows: Each frequency used equally one the average by each transmitter. The system receiver have input bandwidths that match the hopping channel bandwidths of their corresponding transmitter and shift frequencies in synchronization with the transmitted signals. V1.0 Page 32 of 41 Report No.: CTL2403197022-WF 3.10. Antenna Requirement Standard Applicable For intentional device, according to FCC 47 CFR Section 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. And according to FCC 47 CFR Section 15.247 (b), if transmitting antennas of directional gain greater than 6dBi are used, the power shall be reduced by the amount in dB that the directional gain of the antenna exceeds 6dBi. Refer to statement below for compliance The manufacturer may design the unit so that the user can replace a broken antenna, but the use of a standard antenna jack or electrical connector is prohibited. Further, this requirement does not apply to intentional radiators that must be professionally installed. Antenna Connected Construction The maximum gain of antenna was 0dBi. Bluetooth Antenna V1.0 Page 33 of 41 4. Test Setup Photos of the EUT Report No.: CTL2403197022-WF V1.0 Page 34 of 41 Report No.: CTL2403197022-WF V1.0 5. Photos of the EUT Page 35 of 41 Report No.: CTL2403197022-WF External Photos of EUT V1.0 Page 36 of 41 Report No.: CTL2403197022-WF V1.0 Page 37 of 41 Report No.: CTL2403197022-WF V1.0 Page 38 of 41 Internal Photos of EUT Report No.: CTL2403197022-WF V1.0 Page 39 of 41 Report No.: CTL2403197022-WF Bluetooth Antenna V1.0 Page 40 of 41 Report No.: CTL2403197022-WF V1.0 Page 41 of 41 Report No.: CTL2403197022-WF ********************** End of Report *********************WPS 文字