SAR Report

FCC ID: 2AAR8RETEVISRT602

RF Exposure Info

Download: PDF

FCCID_3417479

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

TABLE OF CONTENTS

DOCUMENT REVISION HISTORY ......................................................................................................................... 4
EUT DESCRIPTION .................................................................................................................................................... 5
TECHNICAL SPECIFICATION ......................................................................................................................................... 5
REFERENCE, STANDARDS, AND GUILDELINES ............................................................................................... 6
SAR LIMITS ................................................................................................................................................................. 7
FACILITIES .................................................................................................................................................................. 8
DESCRIPTION OF TEST SYSTEM .......................................................................................................................... 9
EQUIPMENT LIST AND CALIBRATION ............................................................................................................. 14
EQUIPMENTS LIST & CALIBRATION INFORMATION .................................................................................................... 14
SAR MEASUREMENT SYSTEM VERIFICATION .............................................................................................. 15
LIQUID VERIFICATION ............................................................................................................................................... 15
SYSTEM ACCURACY VERIFICATION ........................................................................................................................... 16
SAR SYSTEM VALIDATION DATA ..................................................................................................................... 17
EUT TEST STRATEGY AND METHODOLOGY ................................................................................................. 19
TEST POSITIONS FOR DEVICE OPERATING NEXT TO A PERSON’S EAR........................................................................ 19
CHEEK/TOUCH POSITION ........................................................................................................................................... 20
EAR/TILT POSITION ................................................................................................................................................... 20
TEST POSITIONS FOR BODY-WORN AND OTHER CONFIGURATIONS .............................................................................. 21
TEST DISTANCE FOR SAR EVALUATION .................................................................................................................... 21
SAR EVALUATION PROCEDURE ................................................................................................................................. 22
TEST METHODOLOGY ................................................................................................................................................. 22
CONDUCTED OUTPUT POWER MEASUREMENT ........................................................................................... 23
PROVISION APPLICABLE ............................................................................................................................................ 23
TEST PROCEDURE ...................................................................................................................................................... 23
MAXIMUM TARGET OUTPUT POWER ......................................................................................................................... 23
TEST RESULTS: .......................................................................................................................................................... 23
SAR MEASUREMENT RESULTS ........................................................................................................................... 24
SAR TEST DATA ........................................................................................................................................................ 24
TEST RESULT: ............................................................................................................................................................ 24
SAR MEASUREMENT VARIABILITY .................................................................................................................. 25
SAR PLOTS ................................................................................................................................................................. 26
APPENDIX A MEASUREMENT UNCERTAINTY ............................................................................................... 30
APPENDIX B EUT TEST POSITION PHOTOS .................................................................................................... 32
LIQUID DEPTH ≥ 15CM ............................................................................................................................................ 32
FACE UP SETUP PHOTO(25MM) ................................................................................................................................. 33
BODY WORN BACK SETUP PHOTO(0MM) .................................................................................................................. 33
APPENDIX C CALIBRATION CERTIFICATES .................................................................................................. 34

SAR Evaluation Report 3 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

DOCUMENT REVISION HISTORY

Revision Number Report Number Description of Revision Date of Revision

1.0 RSZ161229008-20 Original Report 2017-05-05

SAR Evaluation Report 4 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

EUT DESCRIPTION

This report has been prepared on behalf of HENAN ESHOW ELECTRONIC COMMERCE CO., LTD
and their product Walkie Talkie, Model: RT602, FCC ID: 2AAR8RETEVISRT602 or the EUT
(Equipment under Test) as referred to in the rest of this report.

*All measurement and test data in this report was gathered from production sample serial number: 16122900821
(Assigned by BACL, Kunshan).The EUT supplied by the applicant was received on 2017-2-28.

Technical Specification

Device Type: Portable
Exposure Category: Population / Uncontrolled
Antenna Type(s): External Antenna
Body Worn Accessories: Headset
Face Up Accessories: None
Modulation Type: FM
GMRS: 462.55 - 462.725 MHz
Frequency Band:
FRS: 467.5625 - 467.7125 MHz
GMRS: 0.34 W
Conducted RF Power:
FRS : 0.325 W
EUT Dimensions (L*W*H): 11.5 cm (L) × 5.5 cm (W) × 3.8 cm (H)
Power Source: DC 1.5V*3 AAA battery
Normal Operation: Face Up and Body worn

SAR Evaluation Report 5 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

REFERENCE, STANDARDS, AND GUILDELINES

FCC:

The Report and Order requires routine SAR evaluation prior to equipment authorization of portable
transmitter devices, including portable telephones. For consumer products, the applicable limit is 1.6 mW/g
as recommended by the ANSI/IEEE standard C95.1-1992 [6] for an uncontrolled environment (Paragraph
65). According to the Supplement C of OET Bulletin 65 “Evaluating Compliance with FCC Guide-lines for
Human Exposure to Radio frequency Electromagnetic Fields", released on Jun 29, 2001 by the FCC, the
device should be evaluated at maximum output power (radiated from the antenna) under “worst-case”
conditions for normal or intended use, incorporating normal antenna operating positions, device peak
performance frequencies and positions for maximum RF energy coupling.

This report describes the methodology and results of experiments performed on wireless data terminal. The
objective was to determine if there is RF radiation and if radiation is found, what is the extent of radiation
with respect to safety limits. SAR (Specific Absorption Rate) is the measure of RF exposure determined by
the amount of RF energy absorbed by human body (or its parts) – to determine how the RF energy couples
to the body or head which is a primary health concern for body worn devices. The limit below which the
exposure to RF is considered safe by regulatory bodies in North America is 1.6 mW/g average over 1 gram
of tissue mass.

CE:

The order requires routine SAR evaluation prior to equipment authorization of portable transmitter devices,
including portable telephones. For consumer products, the applicable limit is 2 mW/g as recommended by
EN62209-1 for an uncontrolled environment. According to the Standard, the device should be evaluated at
maximum output power (radiated from the antenna) under “worst-case” conditions for normal or intended
use, incorporating normal antenna operating positions, device peak performance frequencies and positions
for maximum RF energy coupling.

This report describes the methodology and results of experiments performed on wireless data terminal. The
objective was to determine if there is RF radiation and if radiation is found, what is the extent of radiation
with respect to safety limits. SAR (Specific Absorption Rate) is the measure of RF exposure determined by
the amount of RF energy absorbed by human body (or its parts) – to determine how the RF energy couples
to the body or head which is a primary health concern for body worn devices. The limit below which the
exposure to RF is considered safe by regulatory bodies in Europe is 2 mW/g average over 10 gram of tissue
mass.

The test configurations were laid out on a specially designed test fixture to ensure the reproducibility of
measurements. Each configuration was scanned for SAR. Analysis of each scan was carried out to
characterize the above effects in the device.

SAR Evaluation Report 6 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

SAR Limits

FCC Limit

SAR (W/kg)
(General Population / (Occupational /
EXPOSURE LIMITS
Uncontrolled Exposure Controlled Exposure
Environment) Environment)
Spatial Average
0.08 0.4
(averaged over the whole body)
Spatial Peak
1.60 8.0
(averaged over any 1 g of tissue)
Spatial Peak
(hands/wrists/feet/ankles 4.0 20.0
averaged over 10 g)

CE Limit

SAR (W/kg)
(General Population / (Occupational /
EXPOSURE LIMITS Uncontrolled Exposure Controlled Exposure
Environment) Environment)
Spatial Average
0.08 0.4
(averaged over the whole body)
Spatial Peak
(averaged over any 10 g of 2.0 10
tissue)
Spatial Peak
(hands/wrists/feet/ankles 4.0 20.0
averaged over 10 g)

Population/Uncontrolled Environments are defined as locations where there is the exposure of
individual who have no knowledge or control of their exposure.
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 Spatial Peak limit 1.6W/kg (FCC) & 2 W/kg (CE)
applied to the EUT.

SAR Evaluation Report 7 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

FACILITIES

The test site used by Bay Area Compliance Laboratories Corp. (Kunshan) to collect test data is located on
No.248 Chenghu Road,Kunshan,Jiangsu province,China.

SAR Evaluation Report 8 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

EX3DV4 E-Field Probes

Frequency 10 MHz to > 6 GHz
Linearity: ± 0.2 dB (30 MHz to 6 GHz)

Directivity ± 0.3 dB in TSL (rotation around probe axis)
± 0.5 dB in TSL (rotation normal to probe axis)

Dynamic 10 µW/g to > 100 mW/g
Range Linearity: ± 0.2 dB (noise: typically < 1 µW/g)

Dimensions Overall length: 337 mm (Tip: 20 mm)
Tip diameter: 2.5 mm (Body: 12 mm)
Typical distance from probe tip to dipole centers: 1 mm

Application High precision dosimetric measurements in any exposure scenario
(e.g., very strong gradient fields); the only probe that enables
compliance testing for frequencies up to 6 GHz with precision of
better 30%.

Compatibility DASY3, DASY4, DASY52 SAR and higher, EASY4/MRI

Robots

The DASY5 system uses the high precision industrial robots TX90XL from Staubli SA (France). The TX
robot family is the successor of the well known RX robot family and offers the same features important for
our application:
 High precision (repeatability 0.02mm)
 High reliability (industrial design)
 Low maintenance costs (virtually maintenance free due to direct drive gears; no belt drives)
 Jerk-free straight movements (brushless synchrony motors; no stepper motors)
 Low ELF interference (motor control fields shielded via the closed metallic construction shields)

The above mentioned robots are controlled by the Staubli CS8c robot controllers. All information regarding
the use and maintenance of the robot arm and the robot controller is contained on the CDs delivered along
with the robot. Paper manuals are available upon request direct from Staubli.

SAR Evaluation Report 11 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

Area Scans

Area scans are defined prior to the measurement process being executed with a user defined variable
spacing between each measurement point (integral) allowing low uncertainty measurements to be
conducted. Scans defined for FCC applications utilize a 15mm 2 step integral, with 1.5mm interpolation
used to locate the peak SAR area used for zoom scan assessments.

Where the system identifies multiple SAR peaks (which are within 25% of peak value) the system will
provide the user with the option of assessing each peak location individually for zoom scan averaging.

Zoom Scan (Cube Scan Averaging)

The averaging zoom scan volume utilized in the DASY5 software is in the shape of a cube and the side
dimension of a 1 g or 10 g mass is dependent on the density of the liquid representing the simulated tissue.
A density of 1000 kg/m3 is used to represent the head and body tissue density and not the phantom liquid
density, in order to be consistent with the definition of the liquid dielectric properties, i.e. the side length of
the 1g cube is 10mm,with the side length of the 10g cube is 21.5mm.

When the cube intersects with the surface of the phantom, it is oriented so that 3 vertices touch the surface
of the shell or the center of a face is tangent to the surface. The face of the cube closest to the surface is
modified in order to conform to the tangent surface.

The zoom scan integer steps can be user defined so as to reduce uncertainty, but normal practice for typical
test applications (including FCC) utilize a physical step of 7 x7 x 7 (5mmx5mmx5mm) providing a volume
of 30 mm in the X & Y & Z axis.

SAR Evaluation Report 12 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

Tissue Dielectric Parameters for Head and Body Phantoms

The head tissue dielectric parameters recommended by the IEEE SCC-34/SC-2 in P1528 have been
incorporated in the following table. These head parameters are derived from planar layer models simulating
the highest expected SAR for the dielectric properties and tissue thickness variations in a human head.
Other head and body tissue parameters that have not been specified in P1528 are derived from the tissue
dielectric parameters computed from the 4-Cole-Cole equations described in Reference [12] and
extrapolated according to the head parameters specified in P1528.

Recommended Tissue Dielectric Parameters for Head and Body

Frequency Head Tissue Body Tissue
(MHz) εr Ơ (S/m) εr Ơ (S/m)
150 52.3 0.76 61.9 0.80
300 45.3 0.87 58.2 0.92
450 43.5 0.87 56.7 0.94
835 41.5 0.90 55.2 0.97
900 41.5 0.97 55.0 1.05
915 41.5 0.98 55.0 1.06
1450 40.5 1.20 54.0 1.30
1610 40.3 1.29 53.8 1.40
1800-2000 40.0 1.40 53.3 1.52
2450 39.2 1.80 52.7 1.95
3000 38.5 2.40 52.0 2.73
5800 35.3 5.27 48.2 6.00

SAR Evaluation Report 13 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

EQUIPMENT LIST AND CALIBRATION

Equipments List & Calibration Information

Calibration Calibration
Equipment Model S/N
Date Due Date
Robot RX90 D03688 N/A N/A
DASY5 Test Software DASY52.8 N/A N/A N/A
DASY5 Measurement Server DASY5 4.5.12 1567 N/A N/A
Data Acquisition Electronics DAE3 379 2016/10/04 2017/10/3
E-Field Probe EX3DV4 7441 2016/11/15 2017/11/14
Dipole, 450MHz D450V3 1096 2016/11/07 2019/11/06
Mounting Device MD4HHTV5 BJPCTC0152 N/A N/A
Oval Flat Phantom ELI V8.0 2051 N/A N/A
Simulated Tissue 450 MHz Head TS-450-H 1610045001 Each Time /
Simulated Tissue 450 MHz Body TS-450-B 1610045002 Each Time /
Network Analyzer 8753B 2625A00809 2016/10/6 2017/10/5
S-Parameter Test Set 85047A 3033A02428 2016/10/6 2017/10/5
Dielectric probe kit 85070B US33020324 2016/6/13 2017/6/12
Signal Generator SMBV100A 261558 2016/7/4 2017/7/4
Power Meter E4419B MY41291878 2017/1/7 2018/1/6
Power Meter Sensor 8481A 2702A68993 2016/5/30 2017/5/29
Power Amplifier 5205PE 1015 N/A N/A
Attenuator 20dB, 100W N/A N/A N/A
Attenuator 3dB, 150W N/A N/A N/A

SAR Evaluation Report 14 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

SAR Evaluation Procedure

The evaluation was performed with the following procedure:

Step 1: Measurement of the SAR value at a fixed location above the ear point or central position was
used as a reference value for assessing the power drop. The SAR at this point is measured at the start
of the test and then again at the end of the testing.

Step 2: The SAR distribution at the exposed side of the head was measured at a distance of 1.4 mm
from the inner surface of the shell. The area covered the entire dimension of the head or radiating
structures of the EUT, the horizontal grid spacing was 15 mm x 15 mm, and the SAR distribution was
determined by integrated grid of 1.5mm x 1.5mm. Based on these data, the area of the maximum
absorption was determined by spline interpolation. The first Area Scan covers the entire dimension of
the EUT to ensure that the hotspot was correctly identified.

Step 3: Around this point, a volume of 32 mm x 32 mm x 32 mm was assessed by measuring 5x 5 x 7
points. On the basis of this data set, the spatial peak SAR value was evaluated under the following
procedure:

1) The data at the surface were extrapolated, since the center of the dipoles is 1.2 mm away
from the tip of the probe and the distance between the surface and the lowest measuring point is
1.3 mm. The extrapolation was based on a least square algorithm. A polynomial of the fourth
order was calculated through the points in z-axes. This polynomial was then used to evaluate the
points between the surface and the probe tip.

2) The maximum interpolated value was searched with a straightforward algorithm. Around this
maximum the SAR values averaged over the spatial volumes (1 g or 10 g) were computed by the
3D-Spline interpolation algorithm. The 3D-Spline is composed of three one dimensional splines
with the “Not a knot"-condition (in x, y and z-directions). The volume was integrated with the
trapezoidal-algorithm. One thousand points (10 x 10 x 10) were interpolated to calculate the
averages.

All neighboring volumes were evaluated until no neighboring volume with a higher average
value was found.

Step 4: Re-measurement of the SAR value at the same location as in Step 1. If the value changed by
more than 5%, the evaluation was repeated.

Test methodology
KDB 447498 D01 General RF Exposure Guidance v06
KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz v01r04
KDB 865664 D02 RF Exposure Reporting v01r02

SAR Evaluation Report 22 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

CONDUCTED OUTPUT POWER MEASUREMENT

Provision Applicable
The measured peak output power should be greater and within 5% than EMI measurement.

Test Procedure
The RF output of the transmitter was connected to the input of the Power meter through a Connector.

EUT Connector Power meter

Maximum Target Output Power

Max. tune-up tolerance power limit for Production
Unit (W)
GMRS: 462.55 - FRS: 467.5625 -
PTT/Mode
462.725 MHz 467.7125 MHz
FM 0.35 0.35

Test Results:

Max. Conducted Output Power
Unit (W)
GMRS 462MHz FRS 467MHz
PTT/Mode
(462.625 MHz) (467.6625 MHz)
FM 0.34 0.325

Note: According to KDB 447498 D01, only 1 channel need to be tested for each channel group.

SAR Evaluation Report 23 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

SAR MEASUREMENT RESULTS

This page summarizes the results of the performed dosimetric evaluation.
SAR Test Data
Environmental Conditions

Temperature: 22.5-23.9 ℃
Relative Humidity: 50 %
ATM Pressure: 1014 mbar
Test Date: 2017/03/19
Testing was performed by Edison Hu..

Test Result:
462 MHz

Max. Max. 1 g SAR Value(W/kg)
Power
Frequency Meas. Rated
Mode Drift
(MHz) Power Power Scaled Meas. SAR 50%
Scaled
Plot
(dB) Factor SAR
(W) (W)
Face up (2.5cm)
FM 462.625 -0.11 0.34 0.35 1.029 0.077 0.039 0.04 1#
Body-Back (0.0cm)
FM 462.625 -0.03 0.34 0.35 1.029 0.17 0.085 0.09 2#

467 MHz:

Max. Max. 1 g SAR Value(W/kg)
Power
Frequency Meas. Rated
Mode Drift
(MHz) Power Power Scaled Meas. SAR 50%
Scaled
Plot
(dB) Factor SAR
(W) (W)
Face up (2.5cm)
FM 467.6625 -0.01 0.325 0.35 1.077 0.054 0.027 0.03 3#
Body-Back (0.0cm)
FM 467.6625 -0.1 0.325 0.35 1.077 0.129 0.065 0.07 4#

Note:
1. For a PTT, only simplex communication technology was supported, so the SAR value need to be corrected
by Multiplying 50%.
2. Passive body-worn and audio accessories generally do not apply to the head SAR of PTT radios.
3. The whole antenna and radiating structures that may contribute to the measured SAR or influence the SAR
distribution has been included in the area scan.

SAR Evaluation Report 24 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

SAR Measurement Variability

In accordance with published RF Exposure KDB procedure 865664 D01 SAR measurement 100 MHz to 6
GHz v01. These 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.

Note: The same procedures should be adapted for measurements according to extremity and occupational
exposure limits by applying a factor of 2.5 for extremity exposure and a factor of 5 for occupational
exposure to the corresponding SAR thresholds.

The Highest Measured SAR Configuration in Each Frequency Band

Head(Face Up)

Meas. SAR (W/kg) Largest to
Frequency Band Freq.(MHz) EUT Position Smallest
Original Repeated SAR Ratio
/ / / / / /

Body(Body Back)

Meas. SAR (W/kg) Largest to
Frequency Band Freq.(MHz) EUT Position Smallest SAR
Original Repeated Ratio
/ / / / / /

Note:
1. Second Repeated Measurement is not required since the ratio of the largest to smallest SAR for the original
and first repeated measurement is not > 1.20.
2. The measured SAR results do not have to be scaled to the maximum tune-up tolerance to determine if
repeated measurements are required.
3. 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..

SAR Evaluation Report 25 of 34

Bay Area Compliance Laboratories Corp. (Kunshan) Report No: RSZ161229008-20

APPENDIX C CALIBRATION CERTIFICATES

Please Refer to the Attachment.

***** END OF REPORT *****

SAR Evaluation Report 34 of 34

Document Created: 2019-10-01 22:52:37
Document Modified: 2019-10-01 22:52:37

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC