Test report SAR Part 2

FCC ID: OSDUNITEHBT

RF Exposure Info

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FCCID_4468621

Test report no.: 1-4846/17-02-33

1 Table of contents

1 Table of contents .......................................................................................................................................2

2 Calibration report “Probe ES3DV3” ........................................................................................................3

3 Calibration report “1900 MHz System validation dipole” ....................................................................14

4 Calibration certificate of Data Acquisition Unit (DAE) ........................................................................24

5 Certificate of “SAM Twin Phantom V4.0/V4.0C’’ .................................................................................25

6 Application Note System Performance Check .....................................................................................26
6.1 Purpose of system performance check .....................................................................................26
6.2 System Performance check procedure ......................................................................................26
6.3 Uncertainty Budget ......................................................................................................................27
6.4 Power set-up for validation .........................................................................................................31
6.5 Laboratory reflection ...................................................................................................................32
6.6 Additional system checks ...........................................................................................................32

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Test report no.: 1-4846/17-02-33

System Performance Check
The DASY5 installation includes predefined files with recommended procedures for measurements and
validation. They are read-only document files and destined as fully defined but unmeasured masks, so you
must save the finished validation under a different name. The validation document requires the Generic Twin
Phantom, so this phantom must be properly installed in your system. (You can create your own
measurement procedures by opening a new document or editing an existing document file). Before you start
the validation, you just have to tell the system with which components (probe, medium, and device) you are
performing the validation; the system will take care of all parameters. After the validation, which will take
about 20 minutes, the results of each task are displayed in the document window. Selecting all measured
tasks and opening the predefined “validation” graphic format displays all necessary information for validation.
A description of the different measurement tasks in the predefined document is given below, together with
the information that can be deduced from their results:
• The „reference“ and „drift“ measurements are located at the beginning and end of the batch process.
They measure the field drift at one single point in the liquid over the complete procedure. The indicated
drift is mainly the variation of the amplifier output power. If it is too high (above ± 0.1dB) the validation
should be repeated; some amplifiers have very high drift during warm-up. A stable amplifier gives drift
results in the DASY5 system below ± 0.02 dB.
• The „area scan“ measures the SAR above the dipole on a parallel plane to the surface. It is used to
locate the approximate location of the peak SAR with 2D spline interpolation. The proposed scan uses
large grid spacing for faster measurement; due to the symmetric field the peak detection is reliable. If a
finer graphic is desired, the grid spacing can be reduced. Grid spacing and orientation have no influence
on the SAR result.
• The zoom scan job measures the field in a volume around the peak SAR value assessed in the previous
„area“ scan (for more information see the application note on SAR evaluation).
If the validation measurements give reasonable results, the peak 1g and 10g spatial SAR values averaged
between the two cubes and normalized to 1W dipole input power give the reference data for comparisons.
The next section analyzes the expected uncertainties of these values. Section 6 describes some additional
checks for further information or troubleshooting.

6.3 Uncertainty Budget
Please note that in the following Tables, the tolerance of the following uncertainty components depends on
the actual equipment and setup at the user location and need to be either assessed or verified on-site by the
end user of the DASY5 system:
• RF ambient conditions
• Dipole Axis to Liquid Distance
• Input power and SAR drift measurement
• Liquid permittivity - measurement uncertainty
• Liquid conductivity - measurement uncertainty
Note: All errors are given in percent of SAR, so 0.1 dB corresponds to 2.3%. The field error would be half of
that. The liquid parameter assessment give the targeted values from the dipole document. All errors are
given in percent of SAR, so 0.1dB corresponds to 2.3%. The field error would be half of that.

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Test report no.: 1-4846/17-02-33

System validation

In the table below, the system validation uncertainty with respect to the analytically assessed SAR
value of a dipole source as given in the IEEE1528 standard is given. This uncertainty is smaller
than the expected uncertainty for mobile phone measurements due to the simplified setup and the
symmetric field distribution.

Uncertainty Budget for System Validation
for the 0.3 - 6 GHz range
Source of Uncertainty Probability Divisor ci ci Standard Uncertainty vi2 or
uncertainty Value Distribution (1g) (10g) ± %, (1g) ± %, (10g) veff
Measurement System
Probe calibration ± 6.6 % Normal 1 1 1 ± 6.6 % ± 6.6 % ∞
Axial isotropy ± 4.7 % Rectangular √ 3 1 1 ± 2.7 % ± 2.7 % ∞
Hemispherical isotropy ± 9.6 % Rectangular √ 3 0 0 ± 0.0 % ± 0.0 % ∞
Boundary effects ± 1.0 % Rectangular √ 3 1 1 ± 0.6 % ± 0.6 % ∞
Probe linearity ± 4.7 % Rectangular √ 3 1 1 ± 2.7 % ± 2.7 % ∞
System detection limits ± 1.0 % Rectangular √ 3 1 1 ± 0.6 % ± 0.6 % ∞
Readout electronics ± 0.3 % Normal 1 1 1 ± 0.3 % ± 0.3 % ∞
Response time ± 0.0 % Rectangular √ 3 1 1 ± 0.0 % ± 0.0 % ∞
Integration time ± 0.0 % Rectangular √ 3 1 1 ± 0.0 % ± 0.0 % ∞
RF ambient conditions ± 1.0 % Rectangular √ 3 1 1 ± 0.6 % ± 0.6 % ∞
Probe positioner ± 0.8 % Rectangular √ 3 1 1 ± 0.5 % ± 0.5 % ∞
Probe positioning ± 6.7 % Rectangular √ 3 1 1 ± 3.9 % ± 3.9 % ∞
Max. SAR evaluation ± 2.0 % Rectangular √ 3 1 1 ± 1.2 % ± 1.2 % ∞
Dipole Related
Dev. of exp. dipole ± 5.5 % Rectangular √ 3 1 1 ± 3.2 % ± 3.2 % ∞
Dipole Axis to Liquid Dist. ± 2.0 % Rectangular √ 3 1 1 ± 1.2 % ± 1.2 % ∞
Input power & SAR drift ± 3.4 % Rectangular √ 3 1 1 ± 2.0 % ± 2.0 % ∞
Phantom and Set-up
Phantom uncertainty ± 4.0 % Rectangular √ 3 1 1 ± 2.3 % ± 2.3 % ∞
SAR correction ± 1.9 % Rectangular √ 3 1 0.84 ± 1.1 % ± 0.9 % ∞
Liquid conductivity (meas.) ± 5.0 % Normal 1 0.78 0.71 ± 3.9 % ± 3.6 % ∞
Liquid permittivity (meas.) ± 5.0 % Normal 1 0.26 0.26 ± 1.3 % ± 1.3 % ∞
Temp. unc. - Conductivity ± 1.7 % Rectangular √ 3 0.78 0.71 ± 0.8 % ± 0.7 % ∞
Temp. unc. - Permittivity ± 0.3 % Rectangular √ 3 0.23 0.26 ± 0.0 % ± 0.0 % ∞
Combined Uncertainty ± 10.7 % ± 10.6 % 330
Expanded Std.
± 21.4 % ± 21.1 %
Uncertainty

Table 1: Measurement uncertainties of the System Validation with DASY5 (0.3-6GHz). The RF ambient
noise uncertainty has been reduced to ±1.0, considering input power levels are ≥ 250mW.

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Document Created: 2019-04-05 14:19:11
Document Modified: 2019-04-05 14:19:11

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