FBL528 Bluetooth Earphone Test Report FCC Part 15.247B_BLE Dongguan Kingtron Tech. Co., Ltd.

Dongguan Kingtron Tech. Co., Ltd. Bluetooth Earphone

FCC ID Filing: 2AKSRFBL528
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Model: FBL528
FCC Part 15C
Measurement and Test Report
For
Dongguan Kingtron Tech. Co., Ltd.
No.3 Fuming North Rd, Shu'an Industrial Park, Shu'tian, Humen Town,
Dongguan, China
FCC ID: 2AKSRFBL528
FCC Rule(s):
FCC Part 15.247
Product Description:
Bluetooth Earphone
Tested Model:
FBL528
Report No.:
STR16128279I-2
Tested Date:
2016-06-12 to 2016-06-20
Issued Date:
2016-12-29
Tested By:
Jong Wang / Engineer
Reviewed By:
Silin Chen / EMC Manager
Approved & Authorized By:
Jandy so / PSQ Manager
Prepared By:
Shenzhen SEM.Test Technology Co., Ltd.
1/F, Building A, Hongwei Industrial Park, Liuxian 2nd Road,
Bao'an District, Shenzhen, P.R.C.(518101)
Tel.: +86-755-33663308 Fax.: +86-755-33663309 Website: www.semtest.com.cn
Note: This test report is limited to the above client company and the product model only. It
may not be duplicated without prior permitted by Shenzhen SEM.Test Technology Co., Ltd.
REPORT NO.: STR16128279I-2
PAGE 1 OF 35
FCC PART 15.247
Model: FBL528
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 TEST FACILITY .......................................................................................................................................................4
1.5 EUT SETUP AND TEST MODE .................................................................................................................................5
1.6 MEASUREMENT UNCERTAINTY ..............................................................................................................................5
1.7 TEST EQUIPMENT LIST AND DETAILS .....................................................................................................................6
2. SUMMARY OF TEST RESULTS ...........................................................................................................................7
3. RF EXPOSURE .........................................................................................................................................................8
3.1 STANDARD APPLICABLE.........................................................................................................................................8
3.2 TEST RESULT..........................................................................................................................................................8
4. ANTENNA REQUIREMENT ..................................................................................................................................9
4.1 STANDARD APPLICABLE.........................................................................................................................................9
4.2 EVALUATION INFORMATION ..................................................................................................................................9
5. POWER SPECTRAL DENSITY ...........................................................................................................................10
5.1 STANDARD APPLICABLE.......................................................................................................................................10
5.2 TEST PROCEDURE .................................................................................................................................................10
5.3 ENVIRONMENTAL CONDITIONS ............................................................................................................................10
5.4 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................10
6. 6DB BANDWIDTH .................................................................................................................................................13
6.1 STANDARD APPLICABLE.......................................................................................................................................13
6.2 TEST PROCEDURE .................................................................................................................................................13
6.3 ENVIRONMENTAL CONDITIONS ............................................................................................................................13
6.4 SUMMARY OF TEST RESULTS/PLOTS ....................................................................................................................13
7. RF OUTPUT POWER ............................................................................................................................................16
7.1 STANDARD APPLICABLE.......................................................................................................................................16
7.2 TEST PROCEDURE .................................................................................................................................................16
7.3 ENVIRONMENTAL CONDITIONS ............................................................................................................................16
7.4 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 ................................................................................................................................32
10.1 TEST PROCEDURE ...............................................................................................................................................32
10.2 BASIC TEST SETUP BLOCK DIAGRAM .................................................................................................................32
10.3 ENVIRONMENTAL CONDITIONS ..........................................................................................................................32
10.4 TEST RECEIVER SETUP .......................................................................................................................................33
10.5 SUMMARY OF TEST RESULTS/PLOTS ..................................................................................................................33
10.6 CONDUCTED EMISSIONS TEST DATA ..................................................................................................................33
REPORT NO.: STR16128279I-2
PAGE 2 OF 35
FCC PART 15.247
Model: FBL528
1. GENERAL INFORMATION
1.1 Product Description for Equipment Under Test (EUT)
Client Information
Applicant:
Address of applicant:
Manufacturer:
Address of manufacturer:
Dongguan Kingtron Tech. Co., Ltd.
No.3 Fuming North Rd, Shu'an Industrial Park, Shu'tian,
Humen Town, Dongguan, China
Dongguan Kingtron Tech. Co., Ltd.
No.3 Fuming North Rd, Shu'an Industrial Park, Shu'tian,
Humen Town, Dongguan, China
General Description of EUT
Product Name:
Bluetooth Earphone
Brand Name:
Model No.:
FBL528
Adding Model(s):
FBL206, FBL209, FBL216, FBL219, FBL518, FBL809
Rated Voltage:
DC 3.7V Battery; USB 5V charging purpose only
Note: The test data is gathered from a production sample provided by the manufacturer. The appearance of
others models listed in the report is different from main-test model FBL528, but the circuit and the
electronic construction do not change, declared by the manufacturer.
Technical Characteristics of EUT
Bluetooth Version:
Frequency Range:
RF Output Power:
Data Rate:
Modulation:
Quantity of Channels:
Channel Separation:
Type of Antenna:
Antenna Gain:
Lowest Internal Frequency:
REPORT NO.: STR16128279I-2
V4.0 (BLE mode)
2402-2480MHz
4.267dBm (Conducted)
25Mbps
GFSK
40
2MHz
Chip Antenna
2 dBi
26MHz
PAGE 3 OF 35
FCC PART 15.247
Model: FBL528
1.2 Test Standards
The following report is prepared on behalf of the Dongguan Kingtron Tech. 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 Test Facility
FCC – Registration No.: 934118
Shenzhen SEM.Test 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 and the Registration is 934118.
Industry Canada (IC) Registration No.: 11464A
The 3m Semi-anechoic chamber of Shenzhen SEM.Test Technology Co., Ltd. has been registered by Certification
and Engineering Bureau of Industry Canada for radio equipment testing with Registration No.: 11464A.
CNAS Registration No.: L4062
Shenzhen SEM.Test Technology Co., Ltd. is a testing organization accredited by China National Accreditation
Service for Conformity Assessment (CNAS) according to ISO/IEC 17025. The accreditation certificate number is
L4062. All measurement facilities used to collect the measurement data are located at 1/F, Building A, Hongwei
Industrial Park, Liuxian 2nd Road, Bao’an District, Shenzhen, P.R.C (518101).
REPORT NO.: STR16128279I-2
PAGE 4 OF 35
FCC PART 15.247
Model: FBL528
1.5 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
Cable Description
Length (m)
Shielded/Unshielded
With / Without Ferrite
USB Cable
0.4
Shielded
Without Ferrite
Special Cable List and Details
Auxiliary Equipment List and Details
Description
Manufacturer
Model
Serial Number
Notebook
Lenovo
E10
LR-63C8R
1.6 Measurement Uncertainty
Measurement uncertainty
Parameter
Conditions
Uncertainty
RF Output Power
Conducted
±0.42dB
Occupied Bandwidth
Conducted
±1.5%
Power Spectral Density
Conducted
±1.8dB
Conducted Spurious Emission
Conducted
±2.17dB
Conducted Emissions
Conducted
±2.88dB
Transmitter Spurious Emissions
Radiated
±5.1dB
REPORT NO.: STR16128279I-2
PAGE 5 OF 35
FCC PART 15.247
Model: FBL528
1.7 Test Equipment List and Details
No.
Description
Serial No.
Spectrum Analyzer
Manufacturer
Agilent
Model
SEMT-1072
E4407B
MY41440400
2016-06-04 2017-06-03
SEMT-1031
Spectrum Analyzer
Rohde & Schwarz
FSP30
836079/035
2016-06-04 2017-06-03
SEMT-1007
EMI Test Receiver
Rohde & Schwarz
ESVB
825471/005
2016-06-04 2017-06-03
SEMT-1008
Amplifier
Agilent
8447F
3113A06717
2016-06-04 2017-06-03
SEMT-1043
Amplifier
C&D
PAP-1G18
2002
2016-06-04 2017-06-03
SEMT-1011
Broadband Antenna
Schwarz beck
VULB9163
9163-333
2016-06-04 2017-06-03
SEMT-1042
Horn Antenna
ETS
3117
00086197
2016-06-04 2017-06-03
SEMT-1121
Horn Antenna
ETS
3116B
00088203
2016-06-04 2017-06-03
SEMT-1069
Loop Antenna
Schwarz beck
FMZB 1516
9773
2016-06-04 2017-06-03
SEMT-1001
EMI Test Receiver
Rohde & Schwarz
ESPI
101611
2016-06-04 2017-06-03
SEMT-1003
L.I.S.N
Schwarz beck
NSLK8126
8126-224
2016-06-04 2017-06-03
SEMT-1002
Pulse Limiter
Rohde & Schwarz
ESH3-Z2
100911
2016-06-04 2017-06-03
REPORT NO.: STR16128279I-2
PAGE 6 OF 35
Cal Date
Due Date
FCC PART 15.247
Model: FBL528
2. SUMMARY OF TEST RESULTS
FCC Rules
Description of Test Item
Result
§ 2.1093
RF Exposure
Compliant
§15.203;§15.247(b)(4)(i)
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
Note: This device is all the same as FCC ID: 2AFGOA880BL, so all the data were copied from this FCC ID.
REPORT NO.: STR16128279I-2
PAGE 7 OF 35
FCC PART 15.247
Model: FBL528
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.: STR16128279I-2
PAGE 8 OF 35
FCC PART 15.247
Model: FBL528
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 chip antenna, fulfill the requirement of this section.
REPORT NO.: STR16128279I-2
PAGE 9 OF 35
FCC PART 15.247
Model: FBL528
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 D01 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 × 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 Mode
Test Channel
MHz
Power Spectral Density
dBm/3kHz
Limit
dBm/3kHz
2402
-13.191
2442
-11.466
2480
-11.585
GFSK(BLE)
Please refer to the following test plots:
REPORT NO.: STR16128279I-2
PAGE 10 OF 35
FCC PART 15.247
Model: FBL528
Low Channel
Middle Channel
REPORT NO.: STR16128279I-2
PAGE 11 OF 35
FCC PART 15.247
Model: FBL528
High Channel
REPORT NO.: STR16128279I-2
PAGE 12 OF 35
FCC PART 15.247
Model: FBL528
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) ≥ 3 × 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 Mode
Test Channel
MHz
6 dB Bandwidth
kHz
99% Bandwidth
kHz
Limit
kHz
2402
694.3
1046.0
≥500
2442
692.7
1045.5
≥500
2480
693.4
1045.6
≥500
GFSK(BLE)
Please refer to the following test plots:
REPORT NO.: STR16128279I-2
PAGE 13 OF 35
FCC PART 15.247
Model: FBL528
For BLE
Low Channel:
Middle Channel:
REPORT NO.: STR16128279I-2
PAGE 14 OF 35
FCC PART 15.247
Model: FBL528
High Channel:
REPORT NO.: STR16128279I-2
PAGE 15 OF 35
FCC PART 15.247
Model: FBL528
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
According to section KDB-558074 D01 v03r05 section 9.1.1, this procedure shall be used when the measurement
instrument has available a resolution bandwidth that is greater than the DTS bandwidth.
a) Set the RBW ≥ DTS bandwidth.
b) Set VBW ≥ 3 × RBW.
c) Set span ≥ 3 x RBW
d) Sweep time = auto couple.
e) Detector = peak.
f) Trace mode = max hold.
g) Allow trace to fully stabilize.
h) Use peak marker function to determine the peak amplitude level.
7.3 Environmental Conditions
Temperature:
26 C
Relative Humidity:
57
ATM Pressure:
1011 mbar
7.4 Summary of Test Results/Plots
Test Mode
GFSK(BLE)
Frequency
MHz
Reading
dBm
Output Power
mW
Limit
mW
2402
2.662
1.846
1000
2442
4.267
2.671
1000
2480
4.180
2.618
1000
Note: the antenna gain of 2dBi less than 6dBi maximum permission antenna gain value based on 1 watt peak
output power limit.
REPORT NO.: STR16128279I-2
PAGE 16 OF 35
FCC PART 15.247
Model: FBL528
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 C63.10-2013 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.: STR16128279I-2
PAGE 17 OF 35
FCC PART 15.247
Model: FBL528
Antenna
Tower
1m-4m
3m
EUT SYS
1.5m
Turntable
Table
To EMI Receiver
Ground Plane
Frequency :9kHz-30MHz
RBW=10KHz,
VBW =30KHz
Sweep time= Auto
Trace = max hold
Detector function = peak
Frequency :30MHz-1GHz
RBW=120KHz,
VBW=300KHz
Sweep time= Auto
Trace = max hold
Detector function = peak, QP
Frequency :Above 1GHz
RBW=1MHz,
VBW=3MHz(Peak), 10Hz(AV)
Sweep time= Auto
Trace = max hold
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.: STR16128279I-2
PAGE 18 OF 35
FCC PART 15.247
Model: FBL528
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:
Bluetooth Earphone
Tested Model:
FBL528
Operating Condition:
Transmitting-Low channel (2402MHz)
Comment:
DC 3.7V Battery
Test Specification:
No.
Horizontal
Frequency
Reading
Correct
Result
Limit
Margin
Degree
Height
(MHz)
(dBuV/m)
dB/m
(dBuV/m)
(dBuV/m)
(dB)
( °)
(cm)
43.5056
14.66
4.94
19.60
40.00
-20.40
51
100
peak
50.0566
15.45
4.98
20.43
40.00
-19.57
76
100
peak
163.7549
18.59
2.44
21.03
43.50
-22.47
106
100
peak
258.3263
17.34
9.62
26.96
46.00
-19.04
158
100
peak
420.5803
17.16
11.90
29.06
46.00
-16.94
193
100
peak
701.7609
16.23
17.24
33.47
46.00
-12.53
267
100
peak
REPORT NO.: STR16128279I-2
PAGE 19 OF 35
Remark
FCC PART 15.247
Model: FBL528
Test Specification:
No.
Vertical
Frequency
Reading
Correct
Result
Limit
Margin
Degree
Height
(MHz)
(dBuV/m)
dB/m
(dBuV/m)
(dBuV/m)
(dB)
( °)
(cm)
42.6000
15.44
4.94
20.38
40.00
-19.62
58
100
peak
72.0843
17.09
2.62
19.71
40.00
-20.29
97
100
peak
323.3204
16.30
11.84
28.14
46.00
-17.86
126
100
peak
457.5073
15.84
12.96
28.80
46.00
-17.20
158
100
peak
633.9073
17.83
17.86
35.69
46.00
-10.31
264
100
peak
779.6068
17.07
16.80
33.87
46.00
-12.13
310
100
peak
REPORT NO.: STR16128279I-2
PAGE 20 OF 35
Remark
FCC PART 15.247
Model: FBL528
Plot of Radiated Emissions Test Data
EUT:
Bluetooth Earphone
Tested Model:
FBL528
Operating Condition:
Transmitting-Middle channel (2442MHz)
Comment:
DC 3.7V Battery
Test Specification:
No.
Horizontal
Frequency
Reading
Correct
Result
Limit
Margin
Degree
Height
(MHz)
(dBuV/m)
dB/m
(dBuV/m)
(dBuV/m)
(dB)
( °)
(cm)
48.3318
15.72
4.96
20.68
40.00
-19.32
52
100
peak
163.7549
18.09
2.44
20.53
43.50
-22.97
88
100
peak
336.0351
16.08
11.48
27.56
46.00
-18.44
136
100
peak
385.2805
16.91
12.03
28.94
46.00
-17.06
129
100
peak
558.7301
15.89
14.01
29.90
46.00
-16.10
185
100
peak
651.9416
15.85
17.77
33.62
46.00
-12.38
216
100
peak
REPORT NO.: STR16128279I-2
PAGE 21 OF 35
Remark
FCC PART 15.247
Model: FBL528
Test Specification:
No.
Vertical
Frequency
Reading
Correct
Result
Limit
Margin
Degree
Height
(MHz)
(dBuV/m)
dB/m
(dBuV/m)
(dBuV/m)
(dB)
( °)
(cm)
52.5753
14.88
5.05
19.93
40.00
-20.07
36
100
peak
72.0843
16.39
2.62
19.01
40.00
-20.99
59
100
peak
301.4224
15.12
11.94
27.06
46.00
-18.94
164
100
peak
426.5210
16.87
12.08
28.95
46.00
-17.05
90
100
peak
535.7073
15.91
13.82
29.73
46.00
-16.27
253
100
peak
677.5798
14.97
18.55
33.52
46.00
-12.48
167
100
peak
REPORT NO.: STR16128279I-2
PAGE 22 OF 35
Remark
FCC PART 15.247
Model: FBL528
Plot of Radiated Emissions Test Data
EUT:
Bluetooth Earphone
Tested Model:
FBL528
Operating Condition:
Transmitting-High channel (2480MHz)
Comment:
DC 3.7V Battery
Test Specification:
Horizontal
、
No.
Frequency
Reading
Correct
Result
Limit
Margin
Degree
Height
(MHz)
(dBuV/m)
dB/m
(dBuV/m)
(dBuV/m)
(dB)
( °)
(cm)
48.3318
15.41
4.96
20.37
40.00
-19.63
57
100
peak
112.1305
14.30
4.86
19.16
43.50
-24.34
69
100
peak
324.4561
15.77
11.80
27.57
46.00
-18.43
94
100
peak
426.5210
15.93
12.08
28.01
46.00
-17.99
231
100
peak
651.9417
16.14
17.77
33.91
46.00
-12.09
168
100
peak
755.3873
15.37
18.35
33.72
46.00
-12.28
152
100
peak
REPORT NO.: STR16128279I-2
PAGE 23 OF 35
Remark
FCC PART 15.247
Model: FBL528
Test Specification:
No.
Vertical
Frequency
Reading
Correct
Result
Limit
Margin
Degree
Height
(MHz)
(dBuV/m)
dB/m
(dBuV/m)
(dBuV/m)
(dB)
( °)
(cm)
58.4074
16.24
4.99
21.23
40.00
-18.77
66
100
peak
400.4319
15.63
12.67
28.30
46.00
-17.70
210
100
peak
526.3967
15.73
13.87
29.60
46.00
-16.40
135
100
peak
642.8613
15.61
18.00
33.61
46.00
-12.39
167
100
peak
691.9867
16.00
17.78
33.78
46.00
-12.22
254
100
peak
752.7432
15.72
18.47
34.19
46.00
-11.81
269
100
peak
REPORT NO.: STR16128279I-2
PAGE 24 OF 35
Remark
FCC PART 15.247
Model: FBL528
Spurious Emissions Above 1GHz
Transmitting: BLE mode:
Frequency
Reading
Correct
Result
Limit
Margin
Polar
(MHz)
(dBuV/m)
dB
(dBuV/m)
(dBuV/m)
(dB)
H/V
Detector
Low Channel-2402MHz
4804
58.18
-3.59
54.59
74
-19.41
PK
4804
40.91
-3.59
37.32
54
-16.68
AV
7206
57.27
-0.52
56.75
74
-17.25
PK
7206
45.45
-0.52
44.93
54
-9.07
AV
4804
56.36
-3.59
52.77
74
-21.23
PK
4804
48.18
-3.59
44.59
54
-9.41
AV
7206
56.36
-0.52
55.84
74
-18.16
PK
7206
41.82
-0.52
41.30
54
-12.70
AV
Middle Channel-2442MHz
4884
56.36
-3.49
52.87
74
-21.13
PK
4884
40.00
-3.49
36.51
54
-17.49
AV
7326
59.09
-0.47
58.62
74
-15.38
PK
7326
41.82
-0.47
41.35
54
-12.65
AV
4884
53.64
-3.49
50.15
74
-23.85
PK
4884
41.82
-3.49
38.33
54
-15.67
AV
7326
58.18
-0.47
57.71
74
-16.29
PK
7326
45.45
-0.47
44.98
54
-9.02
AV
High Channel-2480MHz
4960
60.00
-3.41
56.59
74
-17.41
PK
4960
40.00
-3.41
36.59
54
-17.41
AV
7440
58.18
-0.42
57.76
74
-16.24
PK
7440
46.36
-0.42
45.94
54
-8.06
AV
4960
58.18
-3.41
54.77
74
-19.23
PK
4960
45.45
-3.41
42.04
54
-11.96
AV
7440
52.73
-0.42
52.31
74
-21.69
PK
7440
41.82
-0.42
41.40
54
-12.60
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.: STR16128279I-2
PAGE 25 OF 35
FCC PART 15.247
Model: FBL528
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.: STR16128279I-2
PAGE 26 OF 35
FCC PART 15.247
Model: FBL528
9.3 Environmental Conditions
Temperature:
23C
Relative Humidity:
54
ATM Pressure:
1011 mbar
9.4 Summary of Test Results/Plots
Restricted Bandedge (Radiated)
Lowest Bandedge-BLE
Horizontal (Worst case)
No.
Frequency
Reading
Correct
Result
Limit
Margin
(MHz)
(dBuV/m)
dB/m
(dBuV/m)
(dBuV/m)
(dB)
2310.000
29.47
-3.71
25.76
54.00
-28.24
Average Detector
2310.000
41.57
-3.71
37.86
74.00
-36.14
Peak Detector
2390.000
30.33
-3.54
26.79
54.00
-27.21
Average Detector
2390.000
41.90
-3.54
38.36
74.00
-35.64
Peak Detector
REPORT NO.: STR16128279I-2
PAGE 27 OF 35
Remark
FCC PART 15.247
Model: FBL528
Highest Bandedge-BLE
Horizontal (Worst case)
No.
Frequency
Reading
Correct
Result
Limit
Margin
(MHz)
(dBuV/m)
dB/m
(dBuV/m)
(dBuV/m)
(dB)
2480.000
84.37
-3.33
81.04
Average Detector
2480.000
88.96
-3.33
85.63
Peak Detector
38.02
54.00
-15.98
Average Detector
42.61
74.00
-31.39
Peak Detector
2483.500
2483.500
Delta = 43.02 dBc
Remark
2500.000
29.48
-3.28
26.20
54.00
-30.95
Average Detector
2500.000
41.58
-3.28
38.30
74.00
-37.75
Peak Detector
REPORT NO.: STR16128279I-2
PAGE 28 OF 35
FCC PART 15.247
Model: FBL528
Out of Bandedge and Spurious Emission (Conducted)
Lowest
REPORT NO.: STR16128279I-2
PAGE 29 OF 35
FCC PART 15.247
Model: FBL528
Middle
REPORT NO.: STR16128279I-2
PAGE 30 OF 35
FCC PART 15.247
Model: FBL528
Highest
REPORT NO.: STR16128279I-2
PAGE 31 OF 35
FCC PART 15.247
Model: FBL528
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
To Receiver
Non-conduction table
1.5
80 cm above Ground
Plane
1. 5 m
10.3 Environmental Conditions
Temperature:
25 C
Relative Humidity:
52
ATM Pressure:
1012 mbar
REPORT NO.: STR16128279I-2
PAGE 32 OF 35
FCC PART 15.247
Model: FBL528
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:
-11.66 dB at 4.2579 MHz in the Line, Peak detector, 0.15-30MHz
10.6 Conducted Emissions Test Data
REPORT NO.: STR16128279I-2
PAGE 33 OF 35
FCC PART 15.247
Model: FBL528
Plot of Conducted Emissions Test Data
EUT:
Bluetooth Earphone
Tested Model:
FBL528
Operating Condition:
Transmitting
Comment:
AC 120V/60Hz;Notebook USB 5V
Test Specification:
No.
Neutral
Frequency
Reading
Correct
Result
Limit
Margin
(MHz)
(dBuV)
(dB/m)
(dBuV)
(dBuV)
(dB)
1*
0.1499
44.72
9.50
54.22
66.00
-11.78
peak
0.1499
29.59
9.50
39.09
56.00
-16.91
AVG
0.4580
28.94
9.53
38.47
56.73
-18.26
peak
0.4580
18.44
9.53
27.97
46.73
-18.76
AVG
3.6700
21.92
10.05
31.97
46.00
-14.03
AVG
4.0979
34.07
10.11
44.18
56.00
-11.82
peak
REPORT NO.: STR16128279I-2
PAGE 34 OF 35
Detector
FCC PART 15.247
Model: FBL528
Test Specification:
No.
Line
Frequency
Reading
Correct
Result
Limit
Margin
Detector
(MHz)
(dBuV)
(dB/m)
(dBuV)
(dBuV)
(dB)
0.2580
36.43
9.50
45.93
61.49
-15.56
peak
0.2620
22.59
9.50
32.09
51.36
-19.27
AVG
1.8740
29.75
9.80
39.55
56.00
-16.45
peak
1.9420
17.71
9.81
27.52
46.00
-18.48
AVG
3.7900
23.47
10.07
33.54
46.00
-12.46
AVG
6*
4.2579
34.20
10.14
44.34
56.00
-11.66
peak
***** END OF REPORT *****
REPORT NO.: STR16128279I-2
PAGE 35 OF 35
FCC PART 15.247
Download: FBL528 Bluetooth Earphone Test Report FCC Part 15.247B_BLE Dongguan Kingtron Tech. Co., Ltd.
Mirror Download [FCC.gov]FBL528 Bluetooth Earphone Test Report FCC Part 15.247B_BLE Dongguan Kingtron Tech. Co., Ltd.
Document ID3249814
Application IDEa6cbK1lH4TlbbgoUqLNPg==
Document DescriptionTest Report DTS
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Permanent ConfidentialNo
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Document TypeTest Report
Display FormatAdobe Acrobat PDF - pdf
Filesize61.42kB (767812 bits)
Date Submitted2017-01-06 00:00:00
Date Available2017-01-06 00:00:00
Creation Date2017-01-04 16:04:28
Producing SoftwareAcrobat Distiller 9.3.2 (Windows)
Document Lastmod2017-01-04 16:04:28
Document TitleFCC Part 15.247B_BLE
Document CreatorPScript5.dll Version 5.2.2
Document Author: Administrator

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