0002L WLAN Router Test Report Measurement Report Duubee Intelligent Technologies Inc

Duubee Intelligent Technologies Inc WLAN Router

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Page 1 of 72
Report No.: SER180612602001E
FCC SAR EVALUATION REPORT
In accordance with the requirements of
FCC 47 CFR Part 2(2.1093), ANSI/IEEE C95.1-1992 and
IEEE Std 1528-2013
Product Name: M2
Trademark: duubee
Model Name: D901L
Serial Model: N/A
Report No.: SER180612602001E
FCC ID: 2AP79-0002L
Prepared for
Duubee Intelligent Technologies Inc
2420 Buelingo Lane, Fort Worth, TX, 76131, United States
Prepared by
Shenzhen NTEK Testing Technology Co., Ltd.
1/F, Building E, Fenda Science Park, Sanwei Community, Xixiang Street,
Bao’an District, Shenzhen 518126 P.R.China.
Tel.: +86-755-6115 6588 Fax.: +86-755-6115 6599
Website: http://www.ntek.org.cn
Page 2 of 72
Report No.: SER180612602001E
TEST RESULT CERTIFICATION
Applicant’s name ................. : Duubee Intelligent Technologies Inc
Address.................................. : 2420 Buelingo Lane, Fort Worth, TX, 76131, United States
Manufacturer's Name ........... : Duubee Intelligent Technologies Inc
Address.................................. : 2420 Buelingo Lane, Fort Worth, TX, 76131, United States
Product description
Product name......................... : M2
Trademark ............................ : duubee
Model and/or type reference . : D901L
Serial Model ........................... : N/A
FCC 47 CFR Part 2(2.1093)
Standards ............................. :
ANSI/IEEE C95.1-1992
IEEE Std 1528-2013
Published RF exposure KDB procedures
This device described above has been tested by Shenzhen NTEK. In accordance with the
measurement methods and procedures specified in IEEE Std 1528-2013 and KDB 865664 D01.
Testing has shown that this device is capable of compliance with localized specific absorption rate
(SAR) specified in FCC 47 CFR Part 2(2.1093) and ANSI/IEEE C95.1-1992. The test results in this
report apply only to the tested sample of the stated device/equipment. Other similar
device/equipment will not necessarily produce the same results due to production tolerance and
measurement uncertainties.
This report shall not be reproduced except in full, without the written approval of Shenzhen NTEK,
this document may be altered or revised by Shenzhen NTEK, personal only, and shall be noted in
the revision of the document.
Date of Test
Date (s) of performance of tests .............: Jun. 18, 2018 ~ Jun. 22, 2018
Date of Issue ..........................................: Jun. 29, 2018
Test Result ..............................................: Pass
Prepared By
(Test Engineer)
(Cheng Jiawen)
Approved By
(Lab Manager)
(Sam Chen)
Page 3 of 72
Report No.: SER180612602001E
※ ※ Revision History ※ ※
REV.
DESCRIPTION
ISSUED DATE
REMARK
Rev.1.0
Initial Test Report Release
Jun. 29, 2018
Cheng Jiawen
Page 4 of 72
Report No.: SER180612602001E
TABLE OF CONTENTS
1. General Information .......................................................................................... 6
1.1. RF exposure limits .................................................................................. 6
1.2. Statement of Compliance ....................................................................... 7
1.3. EUT Description ..................................................................................... 7
1.4. Test specification(s) ................................................................................ 8
1.5. Ambient Condition ................................................................................. 8
2. SAR Measurement System ................................................................................. 9
2.1. SATIMO SAR Measurement Set-up Diagram ........................................... 9
2.2. Robot ................................................................................................... 10
2.3. E-Field Probe ........................................................................................ 11
2.3.1. E-Field Probe Calibration................................................................ 11
2.4. SAM phantoms .................................................................................... 12
2.4.1. Technical Data ................................................................................ 12
2.5. Device Holder ...................................................................................... 14
2.6. Test Equipment List .............................................................................. 15
3. SAR Measurement Procedures ........................................................................ 17
3.1. Power Reference.................................................................................. 17
3.2. Area scan & Zoom scan ........................................................................ 17
3.3. Description of interpolation/extrapolation scheme ............................. 19
3.4. Volumetric Scan ................................................................................... 19
3.5. Power Drift .......................................................................................... 19
4. System Verification Procedure ......................................................................... 19
4.1. Tissue Verification ................................................................................ 19
4.1.1. Tissue Dielectric Parameter Check Results ..................................... 20
4.2. System Verification Procedure ............................................................. 20
4.2.1. System Verification Results ............................................................ 21
5. SAR Measurement variability and uncertainty ................................................. 22
5.1. SAR measurement variability ............................................................... 22
5.2. SAR measurement uncertainty............................................................. 22
6. RF Output Power ............................................................................................. 23
6.1. Maximum Tune-up Limit ...................................................................... 23
6.2. LTE Conducted Power........................................................................... 23
6.3. WLAN Output Power ............................................................................ 25
7. Antenna Location ............................................................................................. 26
8. SAR Results ...................................................................................................... 27
8.1. SAR measurement results .................................................................... 27
8.1.1. SAR measurement Result of LTE Band V ......................................... 27
8.1.2. SAR measurement Result of WLAN 2.4G ........................................ 28
8.2. Simultaneous Transmission Possibilities ............................................... 28
Page 5 of 72
9.
10.
11.
12.
Report No.: SER180612602001E
8.3. SAR Summation Scenario ..................................................................... 28
Appendix A. Photo documentation .................................................................. 29
Appendix B. System Check Plots ................................................................... 30
Appendix C. Plots of High SAR Measurement ............................................... 35
Appendix D. Calibration Certificate ............................................................... 40
Page 6 of 72
Report No.: SER180612602001E
1. General Information
1.1. RF exposure limits
(A).Limits for Occupational/Controlled Exposure (W/kg)
Whole-Body Partial-Body Hands, Wrists, Feet and Ankles
0.4
8.0
20.0
(B).Limits for General Population/Uncontrolled Exposure (W/kg)
Whole-Body Partial-Body Hands, Wrists, Feet and Ankles
0.08
1.6
4.0
NOTE: Whole-Body SAR is averaged over the entire body, partial-body SAR is averaged
over any 1 gram of tissue defined as a tissue volume in the shape of a cube. SAR for hands,
wrists, feet and ankles is averaged over any 10 grams of tissue defined as a tissue volume
in the shape of a cube.
Occupational/Controlled Environments:
Are defined as locations where there is exposure that may be incurred by people who are
aware of the potential for exposure, (i.e. as a result of employment or occupation).
General Population/Uncontrolled Environments:
Are defined as locations where there is the exposure of individuals who have no knowledge or
control of their exposure.
NOTE
HEAD AND TRUNK LIMIT
1.6 W/kg
APPLIED TO THIS EUT
Page 7 of 72
Report No.: SER180612602001E
1.2. Statement of Compliance
The maximum results of Specific Absorption Rate (SAR) found during testing for D901L are as follows.
Max Reported SAR Value(W/kg)
Band
1-g Hotspot
(Separation distance of 5mm)
LTE Band V
1.155
WLAN 2.4G
0.781
Max Simultaneous Tx
1.562
NOTE: The Max Simultaneous Tx is calculated based on the same configuration and test position.
This device is in compliance with Specific Absorption Rate (SAR) for general population/uncontrolled
exposure limits (1.6 W/kg) specified in FCC 47 CFR Part 2(2.1093) and ANSI/IEEE C95.1-1992, and
had been tested in accordance with the measurement methods and procedures specified in IEEE Std
1528-2013 & Published RF exposure KDB procedures.
1.3.
EUT Description
Device Information
Product Name
M2
Trademark
duubee
Model Name
D901L
Serial Model
N/A
FCC ID
Device Phase
2AP79-0002L
Exposure Category
General population / Uncontrolled environment
Antenna Type
FPCB Antenna
Battery Information
DC 3.8V, 2000mAh
Device Operating Configurations
Supporting Mode(s)
LTE Band V, WLAN 2.4G
Test Modulation
LTE(QPSK/16QAM), WLAN(DSSS/OFDM)
Identical Prototype
Band
Tx (MHz)
Rx (MHz)
Operating Frequency Range(s)
LTE Band V
824-849
869-894
Power Class
WLAN 2.4G
2412-2462
3, tested with power control all Max.(LTE Band V)
20407-20525-20643(LTE Band V BW=1.4MHz)
20415-20525-20635(LTE Band V BW=3MHz)
Test Channels (low-mid-high)
20425-20525-20625(LTE Band V BW=5MHz)
20450-20525-20600(LTE Band V BW=10MHz)
1-3-6-9-11(WLAN 2.4G)
Page 8 of 72
1.4. Test specification(s)
FCC 47 CFR Part 2(2.1093)
ANSI/IEEE C95.1-1992
IEEE Std 1528-2013
KDB 865664 D01 SAR measurement 100 MHz to 6 GHz
KDB 865664 D02 RF Exposure Reporting
KDB 447498 D01 General RF Exposure Guidance
KDB 248227 D01 802.11 Wi-Fi SAR
KDB 941225 D05 SAR for LTE Devices
KDB 941225 D06 Hotspot Mode
1.5. Ambient Condition
Ambient temperature
20°C – 24°C
Relative Humidity
30% – 70%
Report No.: SER180612602001E
Page 9 of 72
Report No.: SER180612602001E
2. SAR Measurement System
2.1. SATIMO SAR Measurement Set-up Diagram
These measurements were performed with the automated near-field scanning system OPENSAR from
SATIMO. The system is based on a high precision robot (working range: 901 mm), which positions the
probes with a positional repeatability of better than ±0.03 mm. The SAR measurements were
conducted with dosimetric probe (manufactured by SATIMO), designed in the classical triangular
configuration and optimized for dosimetric evaluation.
The first step of the field measurement is the evaluation of the voltages induced on the probe by the
device under test. Probe diode detectors are nonlinear. Below the diode compression point, the output
voltage is proportional to the square of the applied E-field; above the diode compression point, it is
linear to the applied E-field. The compression point depends on the diode, and a calibration procedure
is necessary for each sensor of the probe.
The Keithley multimeter reads the voltage of each sensor and send these three values to the PC. The
corresponding E field value is calculated using the probe calibration factors, which are stored in the
working directory. This evaluation includes linearization of the diode characteristics. The field
calculation is done separately for each sensor. Each component of the E field is displayed on the
''Dipole Area Scan Interface'' and the total E field is displayed on the ''3D Interface''
Page 10 of 72
Report No.: SER180612602001E
2.2. Robot
The SATIMO SAR system uses the high precision robots from KUKA. For the 6-axis controller system,
the robot controller version (KUKA) from KUKA is used. The KUKA robot series have many features
that are important for our application:
•
High precision (repeatability ±0.03 mm)
•
High reliability (industrial design)
• Jerk-free straight movements
•
Low ELF interference (the closed metallic
construction shields against motor control fields)
Page 11 of 72
Report No.: SER180612602001E
2.3. E-Field Probe
This E-field detection probe is composed of three orthogonal dipoles linked to special Schottky diodes
with low detection thresholds. The probe allows the measurement of electric fields in liquids such as
the one defined in the IEEE and CENELEC standards.
For the measurements the Specific Dosimetric E-Field Probe SN 08/16 EPGO287 with following
specifications is used
- Dynamic range: 0.01-100 W/kg
- Tip Diameter : 2.5 mm
- Distance between probe tip and sensor center: 1 mm
- Distance between sensor center and the inner phantom surface: 2 mm (repeatability better than ±1
mm).
- Probe linearity: ±0.08 dB
- Axial isotropy: <0.25 dB
- Hemispherical Isotropy: <0.50 dB
- Calibration range: 650MHz to 5900MHz for head & body simulating liquid.
- Lower detection limit: 7mW/kg
Angle between probe axis (evaluation axis) and surface normal line: less than 30°.
2.3.1.
E-Field Probe Calibration
Each probe needs to be calibrated according to a dosimetric assessment procedure with accuracy
better than ±10%. The spherical isotropy shall be evaluated and within ±0.25dB. The sensitivity
parameters (Norm X, Norm Y, and Norm Z), the diode compression parameter (DCP) and the
conversion factor (Conv F) of the probe are tested. The calibration data can be referred to appendix D
of this report.
Page 12 of 72
Report No.: SER180612602001E
2.4. SAM phantoms
Photo of SAM phantom SN 16/15 SAM119
The SAM phantom is used to measure the SAR relative to people exposed to electro-magnetic field
radiated by mobile phones.
2.4.1.
Technical Data
Serial
Shell thickness
Number
SN 16/15
SAM119
Filling
volume
Dimensions
Length:1000 mm
2 mm ±0.2 mm
27 liters Width:500 mm
Height:200 mm
Positionner
Permittivity
Material
Gelcoat with
fiberglass
3.4
Loss
Tangent
0.02
Page 13 of 72
Serial Number
SN 16/15 SAM119
Report No.: SER180612602001E
Left Head
Right Head
Flat Part
2.02
2.08
2.09
2.05
2.06
2.06
2.07
2.07
2.08
2.08
2.08
2.10
2.05
2.07
2.10
2.05
2.05
2.07
2.07
2.06
2.07
2.08
2.06
The test, based on ultrasonic system, allows measuring the thickness with an accuracy of 10 μm.
Page 14 of 72
Report No.: SER180612602001E
2.5. Device Holder
The positioning system allows obtaining cheek and tilting position with a very good accuracy. In
compliance with CENELEC, the tilt angle uncertainty is lower than 1 degree.
Serial Number
Holder Material
Permittivity
Loss Tangent
SN 16/15 MSH100
Delrin
3.7
0.005
Page 15 of 72
Report No.: SER180612602001E
2.6. Test Equipment List
This table gives a complete overview of the SAR measurement equipment.
Devices used during the test described are marked
Manufacturer
Name of
Equipment
Type/Model
Serial Number
SN 08/16 EPGO287
Calibration
Last Cal.
Due Date
Sep. 18,
Sep. 17,
2017
2018
SN 03/15 DIP
Apr. 19,
Apr. 18,
0G750-355
2018
2021
SN 03/15 DIP
Apr. 19,
Apr. 18,
0G835-347
2018
2021
SN 03/15 DIP
Apr. 19,
Apr. 18,
0G900-348
2018
2021
SN 03/15 DIP
Apr. 19,
Apr. 18,
1G800-349
2018
2021
SN 03/15 DIP
Apr. 19,
Apr. 18,
1G900-350
2018
2021
SN 03/15 DIP
Apr. 19,
Apr. 18,
2G000-351
2018
2021
SN 03/15 DIP
Apr. 19,
Apr. 18,
2G450-352
2018
2021
SN 03/15 DIP
Apr. 19,
Apr. 18,
2G600-356
2018
2021
Apr. 19,
Apr. 18,
2018
2021
MVG
E FIELD PROBE
SSE2
MVG
750 MHz Dipole
SID750
MVG
835 MHz Dipole
SID835
MVG
900 MHz Dipole
SID900
MVG
1800 MHz Dipole
SID1800
MVG
1900 MHz Dipole
SID1900
MVG
2000 MHz Dipole
SID2000
MVG
2450 MHz Dipole
SID2450
MVG
2600 MHz Dipole
SID2600
MVG
5000 MHz Dipole
SWG5500
SN 13/14 WGA 33
SCLMP
SN 21/15 OCPG 72
NCR
NCR
MVG
Liquid
measurement Kit
MVG
Power Amplifier
N.A
AMPLISAR_28/14_003
NCR
NCR
KEITHLEY
Millivoltmeter
2000
4072790
NCR
NCR
CMU200
117858
Aug. 07,
Aug. 06,
2017
2018
CMW500
103917
Oct. 26,
Oct. 25,
2017
2018
8753D
3410J01136
Aug. 07,
Aug. 06,
2017
2018
E8257D
MY51110112
Aug. 07,
Aug. 06,
2017
2018
Universal radio
R&S
communication
tester
Wideband radio
R&S
communication
tester
HP
Agilent
Network Analyzer
PSG Analog
Signal Generator
Page 16 of 72
Report No.: SER180612602001E
Agilent
Power meter
E4419B
MY45102538
Agilent
Power sensor
E9301A
MY41495644
Agilent
Power sensor
E9301A
US39212148
CB11-20
0D2L51502
MCLI/USA
Directional
Coupler
Aug. 07,
Aug. 06,
2017
2018
Aug. 07,
Aug. 06,
2017
2018
Aug. 07,
Aug. 06,
2017
2018
Aug. 07,
Aug. 06,
2017
2018
Page 17 of 72
Report No.: SER180612602001E
3. SAR Measurement Procedures
The measurement procedures are as follows:

(a) For WWAN power measurement, use base station simulator to configure EUT WWAN
transmission in conducted connection with RF cable, at maximum power in each supported wireless
interface and frequency band.
(b) Read the WWAN RF power level from the base station simulator.
(c)
For WLAN/Bluetooth power measurement, use engineering software to configure EUT
WLAN/Bluetooth continuously transmission, at maximum RF power in each supported wireless
interface and frequency band.
(d) Connect EUT RF port through RF cable to the power meter, and measure WLAN/Bluetooth
output power.

(a) Use base station simulator to configure EUT WWAN transmission in radiated connection, and
engineering software to configure EUT WLAN/Bluetooth continuously transmission, at maximum RF
power, in the highest power channel.
(b) Place the EUT in the positions as Appendix A demonstrates.
(c)
Set scan area, grid size and other setting on the OPENSAR software.
(d) Measure SAR results for the highest power channel on each testing position.
(e) Find out the largest SAR result on these testing positions of each band.
(f)
Measure SAR results for other channels in worst SAR testing position if the reported SAR of
highest power channel is larger than 0.8 W/kg.
According to the test standard, the recommended procedure for assessing the peak spatial-average
SAR value consists of the following steps:
(a) Power reference measurement
(b) Area scan
(c)
Zoom scan
(d) Power drift measurement
3.1. Power Reference
The Power Reference Measurement and Power Drift Measurements are for monitoring the power drift
of the device under test in the batch process. The minimum distance of probe sensors to surface
determines the closest measurement point to phantom surface. This distance cannot be smaller than
the distance of sensor calibration points to probe tip as defined in the probe properties.
3.2. Area scan & Zoom scan
The area scan is a 2D scan to find the hot spot location on the DUT. The zoom scan is a 3D scan
above the hot spot to calculate the 1g and 10g SAR value.
Page 18 of 72
Report No.: SER180612602001E
Measurement of the SAR distribution with a grid of 8 to 16 mm * 8 to 16 mm and a constant distance to
the inner surface of the phantom. Since the sensors cannot directly measure at the inner phantom
surface, the values between the sensors and the inner phantom surface are extrapolated. With these
values the area of the maximum SAR is calculated by an interpolation scheme. Around this point, a
cube of 30 * 30 *30 mm or 32 * 32 * 32 mm is assessed by measuring 5 or 8 * 5 or 8 * 4 or 5 mm. With
these data, the peak spatial-average SAR value can be calculated.
From the scanned SAR distribution, identify the position of the maximum SAR value, in addition
identify the positions of any local maxima with SAR values within 2 dB of the maximum value that will
not be within the zoom scan of other peaks; additional peaks shall be measured only when the primary
peak is within 2 dB of the SAR compliance limit (e.g., 1 W/kg for 1,6 W/kg 1 g limit, or 1,26 W/kg for 2
W/kg, 10 g limit).
Area scan & Zoom scan scan parameters extracted from FCC KDB 865664 D01 SAR measurement
100 MHz to 6 GHz.
Page 19 of 72
Report No.: SER180612602001E
3.3. Description of interpolation/extrapolation scheme
The local SAR inside the phantom is measured using small dipole sensing elements inside a probe
body. The probe tip must not be in contact with the phantom surface in order to minimise
measurements errors, but the highest local SAR will occur at the surface of the phantom.
An extrapolation is using to determinate this highest local SAR values. The extrapolation is based on a
fourth-order least-square polynomial fit of measured data. The local SAR value is then extrapolated
from the liquid surface with a 1 mm step.
The measurements have to be performed over a limited time (due to the duration of the battery) so the
step of measurement is high. It could vary between 5 and 8 mm. To obtain an accurate assessment of
the maximum SAR averaged over 10 grams and 1 gram requires a very fine resolution in the three
dimensional scanned data array.
3.4. Volumetric Scan
The volumetric scan consists to a full 3D scan over a specific area. This 3D scan is useful form multi Tx
SAR measurement. Indeed, it is possible with OpenSAR to add, point by point, several volumetric scan
to calculate the SAR value of the combined measurement as it is define in the standard IEEE1528 and
IEC62209.
3.5. Power Drift
All SAR testing is under the EUT install full charged battery and transmit maximum output power. In
OpenSAR measurement software, the power reference measurement and power drift measurement
procedures are used for monitoring the power drift of EUT during SAR test. Both these procedures
measure the field at a specified reference position before and after the SAR testing. The software will
calculate the field difference in V/m. If the power drifts more than ±5%, the SAR will be retested.
4. System Verification Procedure
4.1. Tissue Verification
The following tissue formulations are provided for reference only as some of the parameters have not
been thoroughly verified. The composition of ingredients may be modified accordingly to achieve the
desired target tissue parameters required for routine SAR evaluation.
Ingredients (% of
Head Tissue
weight)
Frequency Band
5200
5800
Water
34.40 34.40 34.40 55.36 55.36 57.87 57.87 57.87 65.53
65.53
NaCl
0.79
0.79
0.35
0.35
0.16
0.16
0.16
0.00
0.00
1,2-Propanediol
64.81 64.81 64.81
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Triton X-100
0.00
30.45 30.45 19.97 19.97 19.97 24.24
24.24
(MHz)
750
835
0.79
0.00
900
0.00
1800
1900
2000
2450
2600
Page 20 of 72
DGBE
0.00
0.00
0.00
13.84 13.84 22.00 22.00 22.00 10.23
Ingredients (% of
10.23
Body Tissue
weight)
Frequency Band
Report No.: SER180612602001E
5200
5800
Water
50.30 50.30 50.30 69.91 69.91 71.88 71.88 71.88 79.54
79.54
NaCl
0.60
0.60
0.13
0.13
0.16
0.16
0.16
0.00
0.00
1,2-Propanediol
49.10 49.10 49.10
0.00
0.00
0.00
0.00
0.00
0.00
0.00
Triton X-100
0.00
0.00
0.00
9.99
9.99
19.97 19.97 19.97 11.24
11.24
DGBE
0.00
0.00
0.00
19.97 19.97
7.99
9.22
(MHz)
4.1.1.
750
835
0.60
900
1800
1900
2000
2450
7.99
2600
7.99
9.22
Tissue Dielectric Parameter Check Results
The simulating liquids should be checked at the beginning of a series of SAR measurements to
determine of the dielectric parameter are within the tolerances of the specified target values. The
measured conductivity and relative permittivity should be within ±5% of the target values.
Tissue
Type
Body
850
Body
Target Tissue
Measured
Frequency
(MHz)
835
2450
εr (±5%)
σ (S/m)
(±5%)
55.20
0.97
(52.44~57.96)
(0.92~1.01)
52.70
1.95
Measured Tissue
Liquid
εr
σ (S/m)
Temp.
55.14
0.97
21.3 °C
Test Date
Jun. 18, 2018
52.42
1.98
21.3 °C
Jun. 22, 2018
2450
(50.07~55.33) (1.85~2.04)
NOTE: The dielectric parameters of the tissue-equivalent liquid should be measured under similar
ambient conditions and within 2 °C of the conditions expected during the SAR evaluation to satisfy
protocol requirements.
4.2. System Verification Procedure
The system verification is performed for verifying the accuracy of the complete measurement system
and performance of the software. The dipole is connected to the signal source consisting of signal
generator and amplifier via a directional coupler, N-connector cable and adaption to SMA. It is fed with
a power of 100mW (below 5GHz) or 100mW (above 5GHz). To adjust this power a power meter is
used. The power sensor is connected to the cable before the system verification to measure the power
at this point and do adjustments at the signal generator. At the outputs of the directional coupler both
return loss as well as forward power are controlled during the system verification to make sure that
emitted power at the dipole is kept constant. This can also be checked by the power drift measurement
after the test (result on plot).
The system verification is shown as below picture:
Page 21 of 72
4.2.1.
Report No.: SER180612602001E
System Verification Results
Comparing to the original SAR value provided by SATIMO, the verification data should be within its
specification of ±10%. Below table shows the target SAR and measured SAR after normalized to 1W
input power. The table below indicates the system performance verification can meet the variation
criterion and the plots can be referred to Appendix B of this report.
Target SAR (1W)
Measured SAR
(±10%)
(Normalized to 1W)
System
Verification
835MHz Body
2450MHz Body
1-g (W/Kg)
10-g (W/Kg)
9.48
6.29
(8.53~10.42)
(5.66~6.91)
49.32
22.89
(44.39~54.25)
(20.60~25.17)
Liquid
Temp.
Test Date
1-g
10-g
(W/Kg)
(W/Kg)
8.90
5.92
21.3 °C
Jun. 18, 2018
51.50
23.61
21.3 °C
Jun. 22, 2018
Page 22 of 72
Report No.: SER180612602001E
5. SAR Measurement variability and uncertainty
5.1. SAR measurement variability
Per KDB865664 D01 SAR measurement 100 MHz to 6 GHz, SAR measurement variability must be
assessed for each frequency band, which is determined by the SAR probe calibration point and
tissue-equivalent medium used for the device measurements. The additional measurements are
repeated after the completion of all measurements requiring the same head or body tissue-equivalent
medium in a frequency band. The test device should be returned to ambient conditions (normal room
temperature) with the battery fully charged before it is re-mounted on the device holder for the
repeated measurement(s) to minimize any unexpected variations in the repeated results.
1)
Repeated measurement is not required when the original highest measured SAR is < 0.80 W/kg;
steps 2) through 4) do not apply.
2)
When the original highest measured SAR is ≥ 0.80 W/kg, repeat that measurement once.
3)
Perform a second repeated measurement only if the ratio of largest to smallest SAR for the
original and first repeated measurements is > 1.20 or when the original or repeated measurement is ≥
1.45 W/kg (~ 10% from the 1-g SAR limit).
4)
Perform a third repeated measurement only if the original, first or second repeated measurement
is ≥1.5 W/kg and the ratio of largest to smallest SAR for the original, first and second repeated
measurements is > 1.20.
5.2. SAR measurement uncertainty
Per KDB865664 D01 SAR Measurement 100 MHz to 6 GHz, when the highest measured 1-g SAR
within a frequency band is < 1.5 W/kg, the extensive SAR measurement uncertainty analysis described
in IEEE Std 1528-2013 is not required in SAR reports submitted for equipment approval. The
equivalent ratio (1.5/1.6) is applied to extremity and occupational exposure conditions.
Page 23 of 72
Report No.: SER180612602001E
6. RF Output Power
6.1. Maximum Tune-up Limit
The Tune-up Maximum
Band
Mode
Measured
Power (Customer
Range
Maximum Output
Declared)(dBm)
Power(dBm)
LTE
QPSK
21.5±1
20.5~22.5
22.49
Band V
16QAM
21.5±1
20.5~22.5
22.37
802.11b
15±1
14~16
15.8
WLAN
2.4G
6.2. LTE Conducted Power
RB
Band
Band
Width
Modulation
QPSK
LTE
Band
1.4MHz
16QAM
Configuration
Channel/Frequency(MHz)
Tune-up
RB
RB
Size
Offset
22.50
22.14
22.30
22.31
22.50
22.49
22.38
22.21
22.50
22.46
22.32
22.27
22.50
22.30
22.11
22.40
22.50
22.28
22.15
22.32
22.50
22.45
22.09
22.36
21.50
21.19
21.06
21.29
22.50
21.63
21.30
21.60
22.50
21.76
21.50
21.18
22.50
21.70
21.08
20.97
22.50
22.34
22.00
22.30
22.50
22.29
22.18
22.25
22.50
22.33
21.98
22.29
20.50
19.94
19.79
20.29
20407/824.7 20525/836.5 20643/848.3
RB
Band
Band
Width
Modulation
LTE
Band
3MHz
QPSK
Configuration
Channel/Frequency(MHz)
Tune-up
RB
RB
Size
Offset
22.50
22.08
22.03
22.15
22.50
22.05
21.97
22.10
14
22.50
22.31
22.03
22.14
22.50
22.28
22.00
22.23
22.50
22.25
22.16
22.18
20415/825.5 20525/836.5 20635/847.5
Page 24 of 72
16QAM
22.50
22.15
21.99
22.40
15
21.50
21.15
21.02
21.26
22.50
21.70
21.07
21.46
22.50
21.98
21.48
21.11
14
22.50
22.21
21.29
21.44
22.50
21.51
21.30
21.43
22.50
21.59
21.28
21.38
22.50
22.37
21.29
21.43
15
20.50
20.17
20.00
20.36
RB
Band
Band
Width
Modulation
QPSK
LTE
Band
5MHz
16QAM
Configuration
Channel/Frequency(MHz)
Tune-up
RB
RB
Size
Offset
22.50
22.27
22.01
21.95
12
22.50
22.19
21.77
22.29
24
22.50
21.99
22.10
22.26
12
22.50
21.20
21.22
21.15
12
22.50
21.25
21.16
21.19
12
11
22.50
21.23
20.94
21.28
25
21.50
21.20
21.12
21.18
22.50
21.52
21.09
20.55
12
22.50
21.53
20.61
20.62
24
22.50
21.44
20.69
20.82
12
21.50
21.23
21.05
21.30
12
21.50
21.19
21.08
21.28
12
11
21.50
21.13
21.04
21.19
25
20.50
20.30
20.08
20.36
20425/826.5 20525/836.5 20625/846.5
RB
Band
Band
Width
QPSK
LTE
Band
Modulation
10MHz
16QAM
Report No.: SER180612602001E
Configuration
RB
RB
Size
Offset
Channel/Frequency(MHz)
Tune-up
20450/829
20525/836.5
20600/844
22.50
22.14
22.11
22.31
24
22.50
22.27
22.31
22.22
49
22.50
21.90
22.49
22.14
25
22.50
21.30
21.22
21.21
25
12
22.50
21.35
21.18
21.19
25
24
22.50
21.34
21.13
21.21
50
21.50
21.30
21.09
21.27
22.50
21.50
21.86
20.92
24
22.50
21.84
21.54
21.49
Page 25 of 72
Report No.: SER180612602001E
49
22.50
21.01
21.75
21.18
25
21.50
21.36
21.26
21.22
25
12
21.50
21.28
21.19
21.25
25
24
21.50
21.36
21.08
21.22
50
20.50
20.16
20.28
20.34
6.3. WLAN Output Power
Mode
802.11b
802.11g
802.11n
(HT20)
802.11n
(HT40)
Channel
Frequency (MHz)
Tune-up
Output Power (dBm)
2412
16.0
15.1
2437
16.0
15.3
11
2462
16.0
15.8
2412
16.0
15.0
2437
16.0
15.0
11
2462
16.0
15.6
2412
16.0
15.0
2437
16.0
14.9
11
2462
16.0
15.7
2422
16.0
15.2
2437
16.0
15.3
2452
16.0
15.2
Page 26 of 72
Report No.: SER180612602001E
7. Antenna Location
Right Side
93mm
78mm
100mm
LTE Div ANT
59mm
LTE Main ANT
Bottom Side
Back Side
Top Side
Left Side
Back View
Right Side
93mm
16mm
WLAN ANT
50mm
Top Side
Bottom Side 59mm
47mm
Back Side
Left Side
Distance of the Antenna to the EUT surface/edge
Antennas
Front Side
Back Side
Left Side
Right Side
Top Side
Bottom Side
LTE Main ANT
≤ 25mm
≤ 25mm
≤ 25mm
≤ 25mm
≤ 25mm
>25mm
WLAN ANT
≤ 25mm
≤ 25mm
>25mm
≤ 25mm
>25mm
≤ 25mm
Positions for SAR tests
Antennas
Front Side
Back Side
Left Side
Right Side
Top Side
Bottom Side
LTE Main ANT
Yes
Yes
Yes
Yes
Yes
NO
WLAN ANT
Yes
Yes
NO
Yes
NO
Yes
Page 27 of 72
Report No.: SER180612602001E
8. SAR Results
8.1. SAR measurement results
8.1.1.
SAR measurement Result of LTE Band V
Test
SAR Value
Position
Test
of
channel
Hotspot
/Freq.
(W/kg)
Test Mode
1g
10g
Power Conducted Tune-up
Drift
power
power
(±5%)
(dBm)
(dBm)
with 5mm
Scaled
SAR
1g
(W/Kg)
1RB
Front
Side
Back
Side
20525/836.5
10M QPSK(1,49)
0.779 0.358
1.06
22.49
22.50
0.781
20525/836.5
10M QPSK(1,49)
1.017 0.725
1.29
22.49
22.50
1.019
20525/836.5
10M QPSK(1,49)
1.003 0.711
0.03
22.49
22.50
1.005
20525/836.5
10M QPSK(1,49)
0.351 0.220
-1.68
22.49
22.50
0.352
20525/836.5
10M QPSK(1,49)
0.295 0.157
2.27
22.49
22.50
0.296
20525/836.5
10M QPSK(1,49)
0.489 0.267
0.52
22.49
22.50
0.490
20450/829
10M QPSK(1,49)
1.006 0.710
2.19
21.90
22.50
1.155
20600/844
10M QPSK(1,49)
1.011 0.690
-4.13
22.14
22.50
1.098
0.498 0.295
-2.14
21.35
22.50
0.649
0.769 0.429
-0.40
21.35
22.50
1.002
0.228 0.153
2.21
21.35
22.50
0.297
0.295 0.176
0.95
21.35
22.50
0.384
0.384 0.256
0.57
21.35
22.50
0.500
0.713 0.357
0.02
21.18
22.50
0.966
0.728 0.389
0.17
21.19
22.50
0.984
Back
Side Repeated
Left Side
Right
Side
Top Side
Back
Side
Back
Side
50%RB
Front
Side
Back
Side
Left Side
Right
Side
Top Side
Back
Side
Back
20450/829
20450/829
20450/829
20450/829
20450/829
20525/836.5
20600/844
10M
QPSK(25,12)
10M
QPSK(25,12)
10M
QPSK(25,12)
10M
QPSK(25,12)
10M
QPSK(25,12)
10M
QPSK(25,12)
10M
Page 28 of 72
Side
Report No.: SER180612602001E
QPSK(25,12)
100%RB
Back
20450/829 10M QPSK(50,0) 0.684 0.413
Side
NOTE: Hotspot SAR test results of LTE Band V
8.1.2.
2.84
21.30
21.50
0.716
Conducted Tune-up
Scaled
SAR measurement Result of WLAN 2.4G
Test
Position of
Hotspot with
5mm
SAR Value
Test
channel
Test Mode
/Freq.
(W/kg)
Power
Drift
1g
10g
(±5%)
power
power
SAR 1g
(dBm)
(dBm)
(W/Kg)
Front Side
11/2462
802.11 b
0.665
0.291
-0.77
15.30
16.00
0.781
Back Side
11/2462
802.11 b
0.117
0.061
3.92
15.30
16.00
0.137
Right Side
11/2462
802.11 b
0.403
0.189
-1.91
15.30
16.00
0.473
Bottom Side
11/2462
802.11 b
0.268
NOTE: Hotspot SAR test results of WLAN 2.4G
0.156
2.27
15.30
16.00
0.315
8.2. Simultaneous Transmission Possibilities
The Simultaneous Transmission Possibilities of this device are as below:
No.
Configuration
LTE(data) + WLAN 2.4GHz(data)
NOTE: This device WLAN 2.4GHz supports Hotspot operation.
Body
Note
Yes
2.4GHz Hotspot
8.3. SAR Summation Scenario
Per KDB 447498 D01, simultaneous transmission SAR is compliant if,
1)
Scalar SAR summation < 1.6W/kg.
2)
SPLSR = (SAR1 + SAR2)1.5 / (min. separation distance, mm), and the peak separation distance is
determined from the square root of [(x1-x2)2 + (y1-y2)2 + (z1-z2)2], where (x1, y1, z1) and (x2, y2, z2) are the
coordinates of the extrapolated peak SAR locations in the zoom scan. If SPLSR ≤ 0.04, simultaneously
transmission SAR measurement is not necessary.
Test Position
Scaled SARMAX
∑1-g SAR
SPLSR
Remark
1.562
N/A
N/A
0.137
1.293
N/A
N/A
0.352
N/A
0.352
N/A
N/A
Right Side
0.384
0.473
0.858
N/A
N/A
Top Side
0.500
N/A
0.500
N/A
N/A
Bottom Side
N/A
0.315
0.315
N/A
NOTE: 1-g SAR Simultaneous Tx Combination of LTE Band V and WLAN 2.4G.
N/A
Body
LTE Band V
WLAN 2.4G
(W/Kg)
Front Side
0.781
0.781
Back Side
1.155
Left Side
Page 29 of 72
9. Appendix A. Photo documentation
Refer to appendix Test Setup photo---SAR
Report No.: SER180612602001E
Page 30 of 72
10. Appendix B. System Check Plots
Table of contents
MEASUREMENT 1 - System Performance Check - 835MHz
MEASUREMENT 2 - System Performance Check - 2450MHz
Report No.: SER180612602001E
Page 31 of 72
Report No.: SER180612602001E
MEASUREMENT 1
A. Experimental conditions.
Area Scan
ZoomScan
Phantom
Device Position
Band
Channels
Signal
surf_sam_plan.txt, h= 5.00 mm
5x5x7,dx=8mm dy=8mm
dz=5mm,Complete/nsurf_sam_plan.txt, h=
5.00 mm
Validation plane
Dipole
CW835
Middle
CW (Crest factor: 1.0)
B. SAR Measurement Results
Frequency (MHz)
835.000000
Relative permittivity (real part)
55.140000
Relative permittivity
(imaginary part)
Conductivity (S/m)
21.400000
Variation (%)
0.120001
SURFACE SAR
VOLUME SAR
0.969944
Maximum location: X=3.00, Y=3.00
SAR Peak: 1.31 W/kg
SAR 10g (W/Kg)
0.592068
SAR 1g (W/Kg)
0.890348
Page 32 of 72
Z (mm)
SAR
(W/Kg)
0.00
1.3350
4.00
0.8401
3D screen shot
9.00
0.5836
14.00
0.4510
Report No.: SER180612602001E
19.00
0.4630
24.00
0.3621
Hot spot position
29.00
0.2705
Page 33 of 72
Report No.: SER180612602001E
MEASUREMENT 2
A. Experimental conditions.
Area Scan
ZoomScan
Phantom
Device Position
Band
Channels
Signal
surf_sam_plan.txt, h= 5.00 mm
7x7x7,dx=5mm dy=5mm
dz=5mm,Complete/nsurf_sam_plan.txt, h=
5.00 mm
Validation plane
Dipole
CW2450
Middle
CW (Crest factor: 1.0)
B. SAR Measurement Results
Frequency (MHz)
2450.000000
Relative permittivity (real part)
52.420000
Relative permittivity
(imaginary part)
Conductivity (S/m)
13.570000
Variation (%)
-0.100000
SURFACE SAR
VOLUME SAR
1.980111
Maximum location: X=0.00, Y=1.00
SAR Peak: 9.48 W/kg
SAR 10g (W/Kg)
2.360897
SAR 1g (W/Kg)
5.150207
Page 34 of 72
Z (mm)
SAR
(W/Kg)
0.00
9.4704
4.00
5.7974
3D screen shot
9.00
3.0139
14.00
1.5876
Report No.: SER180612602001E
19.00
0.8500
24.00
0.4527
Hot spot position
29.00
0.2431
Page 35 of 72
11. Appendix C. Plots of High SAR Measurement
Table of contents
MEASUREMENT 1 - WLAN 2.4G
MEASUREMENT 2 - LTE Band V
Report No.: SER180612602001E
Page 36 of 72
Report No.: SER180612602001E
MEASUREMENT 1
A. Experimental conditions.
Area Scan
ZoomScan
Phantom
Device Position
Band
Channels
Signal
surf_sam_plan.txt, h= 5.00 mm
7x7x7,dx=5mm dy=5mm
dz=5mm,Complete/nsurf_sam_plan.txt, h=
5.00 mm
Validation plane
Body
IEEE 802.11b ISM
High
IEEE802.b (Crest factor: 1.0)
B. SAR Measurement Results
Frequency (MHz)
2462.000000
Relative permittivity (real part)
52.337701
Relative permittivity
(imaginary part)
Conductivity (S/m)
13.813600
Variation (%)
-0.770000
SURFACE SAR
VOLUME SAR
1.989394
Maximum location: X=18.00, Y=-14.00
SAR Peak: 1.27 W/kg
SAR 10g (W/Kg)
0.291071
SAR 1g (W/Kg)
0.665137
Page 37 of 72
Z (mm)
SAR
(W/Kg)
0.00
1.2269
4.00
0.7206
3D screen shot
9.00
0.3464
14.00
0.1702
Report No.: SER180612602001E
19.00
0.0859
24.00
0.0459
Hot spot position
29.00
0.0305
Page 38 of 72
Report No.: SER180612602001E
MEASUREMENT 2
A. Experimental conditions.
Area Scan
ZoomScan
Phantom
Device Position
Band
Channels
Signal
surf_sam_plan.txt, h= 5.00 mm
5x5x7,dx=8mm dy=8mm
dz=5mm,Complete/nsurf_sam_plan.txt, h=
5.00 mm
Validation plane
Body
LTE band 5
Middle
LTE (Crest factor: 1.0)
B. SAR Measurement Results
Frequency (MHz)
836.500000
Relative permittivity (real part)
55.153288
Relative permittivity
(imaginary part)
Conductivity (S/m)
21.581480
Variation (%)
1.290000
SURFACE SAR
VOLUME SAR
0.972939
Maximum location: X=6.00, Y=18.00
SAR Peak: 1.36 W/kg
SAR 10g (W/Kg)
0.724650
SAR 1g (W/Kg)
1.016703
Page 39 of 72
Z (mm)
SAR
(W/Kg)
0.00
1.0627
4.00
1.0138
3D screen shot
9.00
0.8389
14.00
0.5920
Report No.: SER180612602001E
19.00
0.4409
24.00
0.3231
Hot spot position
29.00
0.2603
Page 40 of 72
12. Appendix D. Calibration Certificate
Table of contents
E Field Probe - SN 08/16 EPGO287
835 MHz Dipole - SN 03/15 DIP 0G835-347
2450 MHz Dipole - SN 03/15 DIP 2G450-352
Report No.: SER180612602001E
Page 41 of 72
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_______________________________________END _____________________________________
Download: 0002L WLAN Router Test Report Measurement Report Duubee Intelligent Technologies Inc
Mirror Download [FCC.gov]0002L WLAN Router Test Report Measurement Report Duubee Intelligent Technologies Inc
Document ID3917659
Application IDaruI5trI7VqbYgspQ41n+g==
Document DescriptionSAR report
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeTest Report
Display FormatAdobe Acrobat PDF - pdf
Filesize341.71kB (4271373 bits)
Date Submitted2018-07-09 00:00:00
Date Available2018-07-09 00:00:00
Creation Date2018-07-04 07:58:14
Producing SoftwareMicrosoft® Office Word 2007
Document Lastmod2018-07-04 15:58:56
Document TitleMeasurement Report
Document CreatorMicrosoft® Office Word 2007
Document Author: Kent

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Title                           : Measurement Report
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