11 Blue Gecko BGM11SxA/BGM11xN Bluetooth Smart Module RF Exposure Info FCC SAR report_BGM11s_07042017 Silicon Laboratories Finland Oy

Silicon Laboratories Finland Oy Blue Gecko BGM11SxA/BGM11xN Bluetooth Smart Module

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SAR Compliance Test Report
Date of Report
Number of
pages:
7/04/2017
21
Client’s Contact
person:
Responsible Test
engineer:
Client:
Pasi Rahikkala
Kirsi Kyllönen
Testing
laboratory:
Verkotan Oy
Elektroniikkatie 17
90590 Oulu
Finland
Tested device
BGM11S
Related reports:
Testing has
been carried out
in accordance
with:
47CFR §2.1093
Radiofrequency Radiation Exposure Evaluation: Portable Devices
Silicon Labs Finland
Alberga Business Park
Bertel Jungin aukio 3
Espoo 02600
Finland
FCC published RF exposure KDB procedures
RSS-102, Issue 5
Evaluation Procedure for Mobile and Portable Radio Transmitters with Respect to Health
Canada’s Safety Code 6 for Exposure of Humans to Radio Frequency Fields
IEEE 1528 - 2013
IEEE Recommended Practice for Determining the Peak Spatial-Average Specific Absorption Rate
(SAR) in the Human Head from Wireless Communications Devices: Measurement Technique
Documentation:
The test report must always be reproduced in full; reproduction of an excerpt only is subject
to written approval of the testing laboratory
Test Results:
The EUT complies with the requirements in respect of all parameters subject to the
test.
The test results relate only to devices specified in this document
Date and
signatures:
For the contents:
07.04.2017
Digitally signed
Miia
by Miia Nurkkala
2017.04.07
Nurkkala Date:
10:29:23 +03'00'
Laboratory Manager
1 (21)
_________________________________________________________________________________________
TABLE OF CONTENTS
1.
SUMMARY OF SAR TEST REPORT ...................................................................................................... 3
1.1
TEST DETAILS .................................................................................................................................. 3
1.2
MAXIMUM RESULTS ........................................................................................................................ 3
1.2.1 Maximum Drift ............................................................................................................................... 3
1.2.2 Measurement Uncertainty ............................................................................................................. 3
2.
DESCRIPTION OF THE DEVICE UNDER TEST (DUT) .......................................................................... 4
2.1
3.
OUTPUT POWER ..................................................................................................................................... 5
3.1
3.2
4.
SUPPORTED FREQUENCY BANDS AND OPERATIONAL MODES.............................................. 4
MAXIMUM SPECIFIED CONDUCTED OUTPUT POWER ............................................................... 5
TESTED CONDUCTED POWER ...................................................................................................... 5
TEST EQUIPMENT ................................................................................................................................... 6
4.1
TEST EQUIPMENT LIST ................................................................................................................... 6
4.1.1 Isotropic E-field Probe Type EX3DV4 ........................................................................................... 7
CONSTRUCTION .......................................................................................................................................... 7
4.2
PHANTOM ......................................................................................................................................... 7
Modular Flat Phantom (MFP) .................................................................................................................... 7
4.3
TISSUE SIMULANTS ........................................................................................................................ 7
4.3.1 Recipes .......................................................................................................................................... 7
4.4
SYSTEM VALIDATION STATUS ...................................................................................................... 7
4.5
SYSTEM CHECK .............................................................................................................................. 8
4.5.1 Tissue Simulant Verification .......................................................................................................... 8
5.
TEST PROCEDURE .................................................................................................................................. 9
5.1.1 Body-worn Configuration, 4.8 mm separation distance .............................................................. 9
5.2
SCAN PROCEDURES ...................................................................................................................... 9
5.3
SAR AVERAGING METHODS .......................................................................................................... 9
6.
MEASUREMENT UNCERTAINTY .......................................................................................................... 10
7.
TEST RESULTS ...................................................................................................................................... 11
7.1
BODY-WORN CONFIGURATION, 4.8 MM SEPARATION DISTANCE ......................................... 11
APPENDIX A: PHOTOS OF THE DUT ........................................................................................................... 12
APPENDIX B: SYSTEM CHECK SCAN ......................................................................................................... 16
APPENDIX C: MEASUREMENT SCAN ......................................................................................................... 17
APPENDIX D: RELEVANT PAGES FROM PROBE CALIBRATION REPORTS ......................................... 18
APPENDIX E: RELEVANT PAGES FROM DIPOLE CALIBRATION REPORTS ......................................... 20
2 (21)
_________________________________________________________________________________________
1. SUMMARY OF SAR TEST REPORT
1.1 Test Details
Equipment under Test (EUT):
Product:
BGM11S
Manufacturer:
Silicon Labs
Serial Number:
NA
FCC ID Number:
QOQ11
ISED ID Number:
5123A-11
Hardware Version:
1.0
DUT Number:
Battery Type used in testing:
23087
087087
Powered externally
Portable/ Mobile device
Portable
State of the Sample
Production sample
Testing information:
Testing performed:
4.4.2017
Notes:
ID2028
Document name:
FCC SAR report_BGM11s_07042017.docx
Temperature C
22±2 / Controlled
Humidity RH%
20±20 / Controlled
Measurement performed by:
Kirsi Kyllönen
1.2 Maximum Results
The maximum reported* SAR value for Body-worn configuration with 4.8 mm separation distance is shown in
a table below. The device conforms to the requirements of the standards when the maximum reported SAR
value is less than or equal to the limit. The SAR limit specified in FCC 47 CFR part 2 (2.1093) for Body is
SAR1g 1.6 W/kg,
Equipment Class
System
Highest Reported*
SAR1g(W/kg) in
Body-Worn
Condition
Result
DTS
Bluetooth
0.22
PASS
* Reported SAR Values are scaled to upper limit of power tuning tolerance.
1.2.1 Maximum Drift
Maximum Drift During Measurements
-0.24 dB*
*Drifts larger than 5% are considered in the scaling factor.
1.2.2 Measurement Uncertainty
Expanded Uncertainty (k=2) 95 %
±22.3 %
3 (21)
_________________________________________________________________________________________
2. DESCRIPTION OF THE DEVICE UNDER TEST (DUT)
The tested device is a Bluetooth module that was implemented to a PCB. Dimensions of the PCB were 37.6
mm x 40.3 mm. The dimensions of the PCB were selected by the manufacturer to optimize radiation
efficiency of the DUT.
Device Category
Portable
Uncontrolled
Exposure Environment
2.1 Supported Frequency Bands and Operational Modes
TX
Frequency
bands
Modes of Operation
Modulation Mode
Transmitter Frequency
Range (MHz)
Bluetooth
GFSK
2402 - 2480
Common features
Output Power and Batteries
The module was powered by a power supply during measurements.
Size of the module
6.5mm x 6.5mm
Antenna type
Internal antenna
4 (21)
_________________________________________________________________________________________
3. OUTPUT POWER
3.1 Maximum specified conducted output power
From a Customer;
Upper Limit (dBm)
Standard
Bluetooth
CH 0
2.402
GHz
CH 40
2.442
GHz
CH 78
2.480
GHz
10.5
10.5
10.5
3.2 Tested conducted power
Measured Power (dBm)
Standard
CH 0
2.402
GHz
CH 40
2.442
GHz
CH 78
2.480
GHz
Bluetooth
10.0
9.7
9.3
5 (21)
_________________________________________________________________________________________
4. TEST EQUIPMENT
Dasy52 near field scanning system, manufactured by SPEAG was used for SAR testing. The
test system consists of high precision robotics system (Staubli), robot controller, computer,
near-field probe, probe alignment sensor, and a phantom containing the tissue equivalent
material. The robot is a six-axis industrial robot performing precise movements to position the
probe to the location of maximum electromagnetic field.
Figure 1 Schematic Laboratory Picture
4.1 Test Equipment List
Main used test system components are listed below. For full equipment list and calibration
intervals, please contact the testing laboratory.
Test Equipment
Model
Serial Number
Calibration date
DAE
DAE3
710
03.2017
Probe
EX3DV4
7447
03.2017
Dipole
D2450V2
758
01.2016
DASY5 Software
52.8.8.1258
na
Signal Generator
Agilent E4438C
MY42082527
05.2015
Amplifier
AR 5S1G4
27573
na
100244
01.2017
Power Sensor
NRP-Z21
6 (21)
_________________________________________________________________________________________
4.1.1 Isotropic E-field Probe Type EX3DV4
Construction
Symmetrical design with triangular core
Built-in shielding against static charges
PEEK enclosure material (resistant to organic solvents, e.g., DGBE)
Calibration
Calibration certificate in Appendix D
10 MHz to >6 GHz (dosimetry); Linearity: ± 0.2 dB (30 MHz to 6 GHz)
Frequency
Directivity
± 0.3 dB in HSL (rotation around probe axis)
± 0.5 dB in tissue material (rotation normal to probe axis)
Dynamic Range
10 µW/g to > 100 mW/g, Linearity: ± 0.2 dB
Overall length: 330 mm
Tip length: 10 mm
Body diameter: 12 mm
Tip diameter: 2.5 mm
General dosimetry up to 6 GHz
Distance from probe tip to dipole centers: 1.0 mm
Compliance tests of mobile phones
Fast automatic scanning in arbitrary phantoms
Dimensions
Application
4.2 Phantom
Modular Flat Phantom (MFP)
The Triple Modular Phantom consists of three identical modules that can be installed and
removed separately without emptying the liquid. It is used for compliance testing of small
wireless devices in body-worn configurations according to IEC 62209-2, etc.
4.3 Tissue Simulants
Recommended values for the dielectric parameters of the tissue simulants are given in IEEE
1528 and FCC published RF Exposure KDB Procedures. The dielectric parameters of the
used tissue simulants were within ±5% of the recommended values in all frequencies used.
SAR testing was carried out within 24 hours of measuring the dielectric parameters. Depth of
the tissue simulant was at least 15.0 cm from the inner surface of the flat phantom.
4.3.1 Recipes
Body (% by weight)
Ingredient
2350-2700 MHz
Deionized Water
70.2
Tween 20
29.62
Salt
0.18
4.4 System Validation Status
Frequency
[MHz]
Dipole Type / SN
Probe Type / SN
2450
D2450V2 / 758
EX3DV4 / 7447
Calibrated
Signal Type
CW
Validation Done
DAE Unit /
SN
DAE3 / 710
Body tissue simulant
3/2017
7 (21)
_________________________________________________________________________________________
4.5 System Check
Date
Tissue
Type
Tissue
Temp. [°C]
Frequency
[MHz]
Input
Power
Measured
SAR1g
[W/kg]
1 W Target
SAR1g
[W/kg]
1W
Normalized
SAR1g
[W/kg]
3.4.2017
M2450
21.5
2450
250mW
12.6
51.2
Deviation1g
(%)
Plot #
50.4
-1.6
4.5.1 Tissue Simulant Verification
Target
Date
3.4.2017
Tissue
Type
M2450
Tissue
Temp.
[°C]
22
Measured
Frequency
[MHz]
Conductivity, σ
[S/m]
Dielectric
Constant
[ε]
Conductivity
σ [S/m]
Dielectric
Constant
[ε]
Deviation σ
(%)
Deviation
ε (%)
2402
1.90
52.8
1.87
50.5
-1.8
-4.4
2442
1.95
52.7
1.92
50.3
-1.1
-4.6
2450
1.96
52.7
1.93
50.3
-0.9
-4.6
2480
2.00
52.7
1.97
50.2
-1.0
-4.8
8 (21)
_________________________________________________________________________________________
5. TEST PROCEDURE
The DUT was set to transmit at a maximum power level and a maximum duty cycle using a
manufacturer specified software.
5.1.1 Body-worn Configuration, 4.8 mm separation distance
The DUT was placed below the flat phantom using a SPEAG device holder. The DUT was
lifted towards the phantom until correct separation distance was reached. Pictures of the test
positions are in appendix A.
5.2 Scan Procedures
First, area scans were used for determination of the field distribution. Next, a zoom scan with
7x7x7 points covering a volume of 30x30x30mm was performed around the highest E-field
value to determine the averaged SAR value. Power drift was determined by measuring the
same point at the start of the area scan and again at the end of the zoom scan.
5.3 SAR Averaging Methods
The maximum SAR value is averaged over a cube of tissue using interpolation and
extrapolation.
Extrapolation routines are used to obtain SAR values between the lowest measurement points
and the inner phantom surface. The extrapolation distance is determined by the surface
detection distance and the probe sensor offset. Several measurements at different distances
are necessary for the extrapolation.
The interpolation, extrapolation and maximum search routines within Dasy47 are all based on
the modified Quadratic Shepard’s method (Robert J. Renka,” Multivariate Interpolation of
Large Sets of Scattered Data”, University of North Texas ACM Transactions on Mathematical
Software, vol. 14, no. 2, June 1988, pp. 139-148).
9 (21)
_________________________________________________________________________________________
6. MEASUREMENT UNCERTAINTY
DASY5 Uncertainty Budget
According to IEEE 1528-2013 and IEC 622091/201x (0.3 - 3 GHz range)
Error Description
Measurement System
Probe Calibration
Axial Isotropy
Hemispherical Isotropy
Boundary Effects
Linearity
System Detection Limits
Modulation Responsem
Readout Electronics
Response Time
Integration Time
RF Ambient Noise
RF Ambient Reflections
Probe Positioner
Probe Positioning
Max. SAR Eval.
Test Sample Related
Device Positioning
Device Holder
Power Drift
Power Scalingp
Phantom and Setup
Phantom Uncertainty
SAR correction
Liquid Conductivity (mea.) DAK
Liquid Permittivity (mea.) DAK
Temp. unc. - Conductivity BB
Temp. unc. - Permittivity BB
Combined Std. Uncertainty
Expanded STD Uncertainty
Uncert.
value
Prob.
Dist.
Div.
(ci)
1g
(ci)
10g
Std. Unc.
(1g)
Std. Unc. (vi)
veff
(10g)
±6.0 %
±4.7 %
±9.6 %
±1.0 %
±4.7 %
±1.0 %
±2.4 %
±0.3 %
±0.8 %
±2.6 %
±3.0 %
±3.0 %
±0.4 %
±2.9 %
±2.0 %
√
√
√
√
√
√
√
√
√
√
√
√
√
0.7
0.7
0.7
0.7
±6.0 %
±1.9 %
±3.9 %
±0.6 %
±2.7 %
±0.6 %
±1.4 %
±0.3 %
±0.5 %
±1.5 %
±1.7 %
±1.7 %
±0.2 %
±1.7 %
±1.2 %
±6.0 %
±1.9 %
±3.9 %
±0.6 %
±2.7 %
±0.6 %
±1.4 %
±0.3 %
±0.5 %
±1.5 %
±1.7 %
±1.7 %
±0.2 %
±1.7 %
±1.2 %
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
∞
±2.9 %
±3.6 %
±5.0 %
±0 %
√
√
±2.9 %
±3.6 %
±2.9 %
±0.0 %
±2.9 %
±3.6 %
±2.9 %
±0.0 %
145
∞
∞
±6.1 %
±1.9 %
±2.5 %
±2.5 %
±3.4 %
±0.4 %
√
√
√
√
√
√
0.78
0.26
0.78
0.23
0.84
0.71
0.26
0.71
0.26
±3.5 %
±1.1 %
±1.1 %
±0.3 %
±1.5 %
±0.1 %
±3.5 %
±0.9 %
±1.0 %
±0.4 %
±1.4 %
±0.1 %
±11.2 %
±22.3 %
±11.1 %
±22.2 %
∞
∞
∞
∞
∞
∞
361
10 (21)
_________________________________________________________________________________________
7. TEST RESULTS
7.1 Body-Worn Configuration, 4.8 mm separation distance
Test
Position*
Maximun
Power
[dBm]
Conducted
Power
[dBm]
Power Drift
[dB]
Dudy Cycle
Measured
SAR1g
[mW/g]
Scaling
Factor
Reported
SAR1g
[mW/g]
40
front
10.5
9.7
-0.19
1:1.6
0.15
1.20
0.18
40
back
10.5
9.7
-0.11
1:1.6
0.18
1.20
0.22
2442
40
right
10.5
9.7
-0.24*
1:1.6
0.03
1.27
0.04
2442
40
left
10.5
9.7
-0.04
1:1.6
0.02
1.20
0.02
2442
40
top
10.5
9.7
-0.02
1:1.6
0.15
1.20
0.18
2442
40
bottom
10.5
9.7
-0.22
1:1.6
0.02
1.20
0.02
2402
back
10.5
10
-0.1
1:1.6
0.17
1.12
0.19
2480
78
back
10.5
9.3
0.02
1:1.6
0.17
1.32
0.22
Band
Channel
2442
2442
Plot #
*Drift considered in scaling factor
*Pictures of the test position are presented in appendix A
11 (21)
_________________________________________________________________________________________
APPENDIX A: PHOTOS OF THE DUT
DUT from front side:
TOP
LEFT SIDE
RIGHT SIDE
BOTTOM
DUT from back side:
TOP
BOTTOM
12 (21)
_________________________________________________________________________________________
Front towards the phantom:
Back towards the phantom:
13 (21)
_________________________________________________________________________________________
Right side towards the phantom:
Left side towards the phantom:
14 (21)
_________________________________________________________________________________________
Top towards the phantom:
Bottom towards the phantom:
15 (21)
_________________________________________________________________________________________
APPENDIX B: SYSTEM CHECK SCAN
Plot 1
16 (21)
_________________________________________________________________________________________
APPENDIX C: MEASUREMENT SCAN
Plot 2
17 (21)
_________________________________________________________________________________________
APPENDIX D: RELEVANT PAGES FROM PROBE CALIBRATION REPORTS
18 (21)
_________________________________________________________________________________________
19 (21)
_________________________________________________________________________________________
APPENDIX E: RELEVANT PAGES FROM DIPOLE CALIBRATION REPORTS
20 (21)
_________________________________________________________________________________________
21 (21)
_________________________________________________________________________________________
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Document DescriptionFCC SAR report_BGM11s_07042017
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Display FormatAdobe Acrobat PDF - pdf
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Creation Date2017-04-07 10:28:22
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Document TitleFCC SAR report_BGM11s_07042017
Document CreatorMicrosoft® Word 2016
Document Author: Tietokone

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