Test Report

Nabfly, Inc. WDMSV1 Wren Dragonfly Micro Speaker 2A36Z-WDMSV1 2A36ZWDMSV1 wdmsv1

download (pdf)

WDMSV1 Wren Dragonfly Micro Speaker by Nabfly

PDF Viewing Options

Not Your Device? Search For Manuals or Datasheets below:


File Info : application/pdf, 41 Pages, 2.88MB

Document DEVICE REPORTWDMSV1-Test-Report-Nabfly-2a36z-wdmsv1-ex-1-5
Shenzhen CTL Testing Technology Co., Ltd. Tel: +86-755-89486194 E-mail: [email protected]
TEST REPORT
FCC PART 15.247

Report Reference No.:

CTL2304212031-WF

Compiled by: ( position+printed name+signature)

Happy Guo (File administrators)

Tested by: ( position+printed name+signature)

Snow Tang (Test Engineer)

Approved by: ( position+printed name+signature)

Ivan Xie (Manager)

Product Name ............................ : Wren Dragonfly Micro Speaker

Model/Type reference ................ : WDMSV1

List Model(s)............................... : N/A

Trade Mark.................................. : Wren

FCC ID......................................... : 2A36Z-WDMSV1

Applicant's name ....................... : Nabfly, Inc.

Address of applicant ................. : 151 W. 25th St. Floor 5, New York, NY 10001 USA

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 ........ : Apr. 20, 2023

Date of Test Date ........................ : Apr. 28, 2023-May. 12, 2023

Date of Issue .............................. : May. 15, 2023

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.: CTL2304212031-WF

TEST REPORT

CTL2304212031-WF

May. 15, 2023 Date of issue

Equipment under Test : Wren Dragonfly Micro Speaker

Sample No Model /Type Listed Models

: CTL230421203-1-S001 : WDMSV1 : N/A

Applicant

: Nabfly, Inc.

Address Manufacturer

: 151 W. 25th St. Floor 5, New York, NY 10001 USA : Shenzhen Rockaudio Technology Co., Ltd.

Address

: 3rd Floor, Building A, Guangshengde lndustrial Park, Fuyong, Baoan District,Shenzhen,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.: CTL2304212031-WF

Revisions Version 1.0

** Modified History **

Description

Issued Data

Report No.

Initial Test Report Release 2023-05-15 CTL2304212031-WF

Remark Tracy Qi

V1.0

Page 4 of 41

Report No.: CTL2304212031-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) .................................................................................................................................... 10 2.6. MODIFICATIONS ............................................................................................................................................................... 10
3. TEST CONDITIONS AND RESULTS ................................................................................................................................. 11
3.1. CONDUCTED EMISSIONS TEST ............................................................................................................................................. 11 3.2. RADIATED EMISSIONS AND BAND EDGE................................................................................................................................. 14 3.3. MAXIMUM PEAK OUTPUT POWER....................................................................................................................................... 28 3.4. 20DB BANDWIDTH ........................................................................................................................................................... 29 3.5. FREQUENCY SEPARATION.................................................................................................................................................... 30 3.6. NUMBER OF HOPPING FREQUENCY ....................................................................................................................................... 31 3.7. TIME OF OCCUPANCY (DWELL TIME) .................................................................................................................................... 32 3.8. OUT-OF-BAND EMISSIONS.................................................................................................................................................. 33 3.9. PSEUDORANDOM FREQUENCY HOPPING SEQUENCE ................................................................................................................ 34 3.10. ANTENNA REQUIREMENT ................................................................................................................................................. 35
4. TEST SETUP PHOTOS OF THE EUT ................................................................................................................................ 36
5. PHOTOS OF THE EUT ................................................................................................................................................... 37

V1.0

Page 5 of 41

Report No.: CTL2304212031-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 SysteKI 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
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(b) 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.: CTL2304212031-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, Shenzhen 518055 China 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 on Jan. 22, 2019.
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, December 08, 2017.

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 Transmitter power conducted

Measurement Uncertainty
±0.57 dB

Notes (1)

Transmitter power Radiated

±2.20 dB

(1)

Conducted spurious emission 9KHz-40 GHz

±1.60 dB

(1)

Occupied Bandwidth

±0.20ppm

(1)

Radiated Emission 9KHz~30MHz

±3.40dB

(1)

Radiated Emission 30~1000MHz

±4.10dB

(1)

Radiated Emission Above 1GHz

±4.32dB

(1)

V1.0

Page 7 of 41

Report No.: CTL2304212031-WF

Conducted Disturbance 0.15~30MHz

±3.20dB

(1)

(1) This uncertainty represents an expanded uncertainty expressed at approximately the 95% (2) confidence level using a coverage factor of k=2.

V1.0

Page 8 of 41

Report No.: CTL2304212031-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:

Wren Dragonfly Micro Speaker

Model/Type reference:

WDMSV1

Power supply:

DC 3.7V from battery

Bluetooth:

Version:

Supported BR/EDR

Modulation:

GFSK, /4DQPSK, 8DPSK

Operation frequency:

2402MHz~2480MHz

Channel number:

79

Channel separation:

1MHz

Antenna type:

PCB Antenna

Antenna gain:

1.7dBi

Note 1: For more details, please refer to the user's manual of the EUT. Note 2: Antenna gain provided by the applicant.

V1.0

Page 9 of 41

Report No.: CTL2304212031-WF

2.3. Description of Test Modes and Test Frequency

The Applicant provides communication tools software(BT_Tool V1.1.0) 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 Item 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.: CTL2304212031-WF

2.4. Equipments Used during the Test

Test Equipment
LISN
Double cone logarithmic
antenna

Manufacturer R&S
Schwarzbeck

Model No. ESH2-Z5 VULB 9168

Serial No. 860014/010

Calibration Date
2023/05/04

Calibration Due Date
2024/05/03

824

2023/02/13 2026/02/12

Horn Antenna

Ocean Microwave

OBH100400

26999002 2021/12/22 2024/12/21

EMI Test Receiver

R&S

ESCI

1166.5950.03 2023/05/04 2024/05/03

Spectrum Analyzer

Agilent

E4407B

MY41440676 2023/05/05 2024/05/04

Spectrum Analyzer

Agilent

N9020A

US46220290 2023/05/05 2024/05/04

Spectrum Analyzer
Horn Antenna
Active Loop Antenna

Keysight Sunol Sciences
Corp.
Da Ze

N9020A DRH-118 ZN30900A

MY53420874 2023/05/05 2024/05/04 A062013 2021/12/23 2024/12/22

/

2021/05/13 2024/05/12

Amplifier Amplifier Amplifier

Agilent
MRT Technology(Suz
hou)Co., Ltd
Brief&Smart

8449B MRT-AP01M06
LNA-4018

3008A02306 S-001
2104197

2023/05/04 2023/05/04 2023/05/05

2024/05/03 2024/05/03 2024/05/04

Temperature/Humi dity Meter

Ji Yu

MC501

/

2023/05/04 2024/05/03

Power Sensor

Agilent

U2021XA

MY53340004 2023/05/05 2024/05/04

Power Sensor

Agilent

U2021XA

MY54080012 2023/05/05 2024/05/04

Power Sensor

Agilent

U2021XA

MY54510008 2023/05/05 2024/05/04

Power Sensor

Agilent

U2021XA

MY55060003 2023/05/05 2024/05/04

Spectrum Analyzer

RS

FSP

1164.4391.38 2023/05/05 2024/05/04

Test Software Name of Software

Version

TST-PASS

V1.1.0

EZ_EMC(Below 1GHz)

V1.1.4.2

EZ_EMC(Above 1GHz) The calibration interval was one year

V1.1.4.2

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 11 of 41

Report No.: CTL2304212031-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 12 of 41

Report No.: CTL2304212031-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 Middle Channel was reported as below:

Line:

L

V1.0

Line:

Page 13 of 41

Report No.: CTL2304212031-WF
N

V1.0

Page 14 of 41

Report No.: CTL2304212031-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 15 of 41

Report No.: CTL2304212031-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 16 of 41
Horizontal

Report No.: CTL2304212031-WF

V1.0

Page 17 of 41
Vertical

Report No.: CTL2304212031-WF

V1.0

Page 18 of 41

Report No.: CTL2304212031-WF

For 1GHz to 25GHz NoteGFSK, Pi/4 DQPSK and 8DPSK all have been tested, only worse case GFSK is reported.

CH00

Horizontal

V1.0

CH00

Page 19 of 41

Report No.: CTL2304212031-WF
Vertical

V1.0

CH39

Page 20 of 41

Report No.: CTL2304212031-WF
Horizontal

V1.0

CH39

Page 21 of 41

Report No.: CTL2304212031-WF
Vertical

V1.0

CH78

Page 22 of 41

Report No.: CTL2304212031-WF
Horizontal

V1.0

CH78

Page 23 of 41

Report No.: CTL2304212031-WF
Vertical

REMARKS: 1. 18GHz-26GHz not recorded for no spurious point have a margin of less than 6 dB with respect to the limits.

V1.0

Page 24 of 41

Report No.: CTL2304212031-WF

Results of Band Edges Test (Radiated) NoteAll modulations have been tested, only worse case GFSK is reported.

CH00

Horizontal

V1.0

CH00

Page 25 of 41

Report No.: CTL2304212031-WF
Vertical

V1.0

CH78

Page 26 of 41

Report No.: CTL2304212031-WF
Horizontal

V1.0

CH78

Page 27 of 41

Report No.: CTL2304212031-WF
Vertical

V1.0

Page 28 of 41

Report No.: CTL2304212031-WF

3.3. Maximum Peak Output Power
Limit For frequency hopping systeKI operating in the 2400-2483.5 MHz band employing at least 75 non-overlapping hopping channels: 1 watt. For all other frequency hopping systeKI 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 Appendix Test Data for Bluetooth BR&EDR Section 2.

V1.0

Page 29 of 41

Report No.: CTL2304212031-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 100 KHz VBW. The 20dB bandwidth is defined as the total spectrum the power of which is higher than peak power minus 20dB. The bandwidth occupied is the frequency bandwidth such that the average power below its low frequency limit and above its high frequency limit are each equal to 0.5% of the total average power for a given transmit. The following steps should be used to measure 99% of the power bandwidth : RBW= 1% to 5% of the OBW VBW= approximately 3 × RBW Detector = Peak Trace mode: Maximum hold Using the instrument's 99% power bandwidth function to measure the occupied bandwidth and re-code.
Test Configuration

EUT

SPECTRUM ANALYZER

Test Results Raw data reference to Appendix Test Data for Bluetooth BR&EDR Section 1.

V1.0

Page 30 of 41

Report No.: CTL2304212031-WF

3.5. Frequency Separation
LIMIT
According to 15.247(a)(1),frequency hopping systeKI 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 with 300 KHz RBW and 300 KHz VBW.
TEST CONFIGURATION

EUT

SPECTRUM ANALYZER

TEST RESULTS Raw data reference to Appendix Test Data for Bluetooth BR&EDR Section 3.

V1.0

Page 31 of 41

Report No.: CTL2304212031-WF

3.6. Number of hopping frequency
Limit
Frequency hopping systeKI in the 2400­2483.5 MHz band shall use at least 15 channels.
Test Procedure
The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: a) Span: The frequency band of operation. Depending on the number of channels the device supports , it could be necessary to divide the frequency range of operation across multiple spans, to allow the individual channels to be clearly seen. b) RBW: To identify clearly the individual channels, set the RBW to less than 30% of the channel spacing or the 20 dB bandwidth, whichever is smaller. c) VBW  RBW. d) Sweep: No faster than coupled (auto) time. e) Detector function: Peak. f) Trace: Max-hold. g) Allow the trace to stabilize.
Test Configuration

EUT

SPECTRUM ANALYZER

Test Results Raw data reference to Appendix Test Data for Bluetooth BR&EDR Section 4.

V1.0

Page 32 of 41

Report No.: CTL2304212031-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 1MHz RBW and 1MHz VBW, Span 0Hz. Test Configuration

EUT

SPECTRUM ANALYZER

Test Results Raw data reference to Appendix Test Data for Bluetooth BR&EDR Section 5.

V1.0

Page 33 of 41

Report No.: CTL2304212031-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 RKI 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 Appendix Test Data for Bluetooth BR&EDR Section 6.

V1.0

Page 34 of 41

Report No.: CTL2304212031-WF

3.9. Pseudorandom Frequency Hopping Sequence
TEST APPLICABLE
For 47 CFR Part 15C section 15.247 (a) (1) requirement: Frequency hopping systeKI 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 systeKI 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 systeKI 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 35 of 41

Report No.: CTL2304212031-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 1.7dBi

BT Antenna

V1.0

Page 36 of 41

4. Test Setup Photos of the EUT

Report No.: CTL2304212031-WF

V1.0
5. Photos of the EUT

Page 37 of 41

Report No.: CTL2304212031-WF

External Photos of EUT

V1.0

Page 38 of 41

Report No.: CTL2304212031-WF

V1.0

Page 39 of 41

Report No.: CTL2304212031-WF

V1.0

Page 40 of 41

Report No.: CTL2304212031-WF

Internal Photos of EUT

BT Antenna

V1.0

Page 41 of 41

Report No.: CTL2304212031-WF

********************** End of Report **********************



Related FCC IDs:

Search Any Device: