RF Expoosure Evaluation

FCC ID: 2AL6K-R8812AF1

RF Exposure Info

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FCCID_4028141

Report No.: GTSR18080103-WLAN03 Page 2 of 9

TEST REPORT

Aug.24, 2018
Test Report No. : GTSR18080103-WLAN03 ______________________________________________________________________________________________

Date of issue

Equipment under Test : IEEE 802.11a/ b/g/n/ac 2T2R USB2.0 WiFi Module

Model /Type : BL-R8812AF1

Listed Models : /

Applicant : Shenzhen Bilian Electronic Co.,Ltd.

: Building B1,Zhongxing Industrial Zone,Juling,Jutang
Address Community, Guanlan street,Longhua New District,
Shenzhen, Guangdong, P.R.China

Manufacturer : Shenzhen Bilian Electronic Co.,Ltd.

: Building B1,Zhongxing Industrial Zone,Juling,Jutang
Address Community, Guanlan street,Longhua New District,
Shenzhen, Guangdong, P.R.China

Test Result: PASS

The test report merely corresponds to the test sample.
It is not permitted to copy extracts of these test result without the written permission of the test
laboratory.

Report No.: GTSR18080103-WLAN03 Page 3 of 9

Contents

1. SUMMARY 4

1.1. EUT configuration 4
1.2. Product Description 4

2. TEST ENVIRONMENT 5

2.1. Address of the test laboratory 5
2.2. Test Facility 5
2.3. Environmental conditions 5
2.4. Statement of the measurement uncertainty 5

3. METHOD OF MEASUREMENT 6

3.1. Applicable Standard 6
3.2. Requirement 6
3.3. Limit 6
3.4. MPE Calculation Method 7
3.5. Antenna Information 7

4. EVALUATION RESULT 8

4.1. Standalone MPE 8
4.2. Simultaneous transmission MPE Considerations 9

5. CONCLUSION 9

Report No.: GTSR18080103-WLAN03 Page 4 of 9

1. SUMMARY

1.1. EUT configuration
The following peripheral devices and interface cables were connected during the measurement:

● - supplied by the manufacturer

○ - supplied by the lab

○ Length (m) : /
Shield : /
Detachable : /

1.2. Product Description

Name of EUT IEEE 802.11a/ b/g/n/ac 2T2R USB2.0 WiFi Module
Trade Mark: LB-LINK
Model Number BL-R8812AF1
Listed Models DC 5V from PC input AC 120V/60Hz
Power Supply IEEE 802.11a/ b/g/n/ac 2T2R USB2.0 WiFi Module
WLAN Supported 802.11a/ 802.11ac/802.11b/802.11g/802.11n
Modulation Type IEEE 802.11ac: OFDM(64QAM, 16QAM, QPSK, BPSK)
IEEE 802.11b: DSSS(CCK,DQPSK,DBPSK)
IEEE 802.11g: OFDM(64QAM, 16QAM, QPSK, BPSK)
IEEE 802.11n HT20: OFDM (64QAM, 16QAM, QPSK,BPSK)
IEEE 802.11n HT40: OFDM (64QAM, 16QAM, QPSK,BPSK)
Operation frequency IEEE 802.11a/ac VHT20: 5745MHz-5825MHz
IEEE 802.11ac VHT 80: 5775MHz
IEEE 802.11b/g:2412-2462MHz
IEEE 802.11n HT20:2412-2462MHz/5745MHz-5825MHz
IEEE 802.11n HT40 /ac CHT 40:2422-2452MHz/5755-5795 MHz
@2.4G GANT +10log(N)dbi =1.92+10log2=4.93dbi ＜6 dbi
Directional gain
@5G GANT +10log(N)dbi =4+10log2=7.01dbi ＞6 dbi
Antenna Type external antenna
1.92dBi @2.4G for ANT1 and ANT2
Antenna gain
4.0dBi @5G for ANT1 and ANT2

Report No.: GTSR18080103-WLAN03 Page 5 of 9

2. TEST ENVIRONMENT

2.1. Address of the test laboratory

Shenzhen Global Test Service Co.,Ltd.
1F, Building No. 13A, Zhonghaixin Science and Technology City, No.12,6 Road, Ganli Industrial Park,
Buji Street, Longgang District, Shenzhen, Guangdong

2.2. Test Facility
The test facility is recognized, certified, or accredited by the following organizations:

FCC-Registration No.: 165275
Shenzhen Global Test Service 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.

CNAS-Lab Code: L8169
Shenzhen Global Test Service Co.,Ltd. has been assessed and proved to be in compliance with CNAS-
CL01 Accreditation Criteria for Testing and Calibration Laboratories (identical to ISO/IEC 17025: 2005
General Requirements) for the Competence of Testing and Calibration Laboratories. Date of Registration:
Dec. 11, 2015. Valid time is until Dec. 10, 2018.

A2LA-Lab Cert. No.: 4758.01

Shenzhen Global Test Service Co.,Ltd. EMC Laboratory has been accredited by A2LA for
technical competence in the field of electrical testing, and proved to be in compliance with ISO/IEC 17025:
2005 General Requirements for the Competence of Testing and Calibration Laboratories and any additional
program requirements in the identified field of testing.

2.3. Environmental conditions
During the measurement the environmental conditions were within the listed ranges:

Temperature: 15-35 °C

Humidity: 30-60 %

Atmospheric pressure: 950-1050mbar

2.4. Statement of the measurement uncertainty
The data and results referenced in this document are true and accurate. The reader is cautioned that there
may be errors within the calibration limits of the equipment and facilities. The measurement uncertainty was
calculated for all measurements listed in this test report acc. to TR-100028-01” Electromagnetic compatibility
and Radio spectrum Matters (ERM);Uncertainties in the measurement of mobile radio equipment
characteristics; Part 1” and TR-100028-02 “Electromagnetic compatibility and Radio spectrum Matters
(ERM);Uncertainties in the measurement of mobile radio equipment characteristics; Part 2 “ and is
documented in the Shenzhen Global Test Service Co.,Ltd quality system acc. to DIN EN ISO/IEC 17025.
Furthermore, component and process variability of devices similar to that tested may result in additional
deviation. The manufacturer has the sole responsibility of continued compliance of the device.

Hereafter the best measurement capability for Shenzhen GTS laboratory is reported:

Test Items Measurement Uncertainty Notes
Transmitter power conducted 0.57 dB (1)

(1) This uncertainty represents an expanded uncertainty expressed at approximately the 95%
confidence level using a coverage factor of k=2.

Report No.: GTSR18080103-WLAN03 Page 6 of 9

3. Method of measurement

3.1. Applicable Standard

According to §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a
manner that ensures that the public is not exposed to radio frequency energy level in excess of the
Commission’s guidelines.
According to §1.1310 and §2.1091 RF exposure is calculated.
KDB447498 v06: Mobile and Portable Devices RF Exposure Procedures and Equipment Authorization
Policies

3.2. Requirement

Systems operating under the provisions of FCC 47 CFR section shall be operated in a manner that ensures
that the public is not exposed to radio frequency energy level in excess of the Commission’s guidelines.
In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as mobile
device whereby a distance of 0.2m normally can be maintained between the user and the device, and below
RF Permissible Exposure limit shall comply with.
In accordance with KDB447498D01 for Simultaneous transmission MPE test exclusion applies when the sum
of the MPE ratios for all simultaneous transmitting antennas incorporated in a host device, based on the
calculated/estimated, numerically modeled or measured field strengths or power density, is ≤ 1.0. The MPE
ratio of each antenna is determined at the minimum test separation distance required by the operating
configurations and exposure conditions of the host device, according to the ratio of field strengths or power
density to MPE limit, at the test frequency. Either the maximum peak or spatially averaged results from
measurements or numerical simulations may be used to determine the MPE ratios. Spatial averaging does not
apply when MPE is estimated using simple calculations based on far-field plane-wave equivalent conditions.
The antenna installation and operating requirements for the host device must meet the minimum test
separation distances required by all antennas, in both standalone and simultaneous transmission operations,
to satisfy compliance.

3.3. Limit
Limits for Maximum Permissible Exposure (MPE)/Controlled Exposure
Averaging
Frequency Electric Field Magnetic Field Power Density
Time
Range(MHz) Strength(V/m) Strength(A/m) (mW/cm²)
(minute)
Limits for Occupational/Controlled Exposure
0.3 – 3.0
614 1.63 (100) * 6
3.0 – 30
1842/f 4.89/f (900/f2)* 6
30 – 300
61.4 0.163 1.0 6
300 – 1500
/ / f/300 6
1500 –
/ / 5 6
100,000

Limits for Maximum Permissible Exposure (MPE)/Uncontrolled Exposure
Averaging
Frequency Electric Field Magnetic Field Power Density
Time
Range(MHz) Strength(V/m) Strength(A/m) (mW/cm²)
(minute)
Limits for Occupational/Controlled Exposure
0.3 – 3.0
614 1.63 (100) * 30
3.0 – 30
824/f 2.19/f (180/f2)* 30
30 – 300
27.5 0.073 0.2 30
300 – 1500
/ / f/1500 30
1500 –
/ / 1.0 30
100,000

F=frequency in MHz
*=Plane-wave equivalent power density

Report No.: GTSR18080103-WLAN03 Page 7 of 9

3.4. MPE Calculation Method

Predication of MPE limit at a given distance
Equation from page 18 of OET Bulletin 65, Edition 97-01

S=PG/4πR²
Where: S=power density
P=power input to antenna
G=power gain of the antenna in the direction of interest relative to an isotropic radiator
R=distance to the center of radiation of the antenna

As declared by the Applicant, the EUT transmits with the maximum soure-baed Duty Cycle of 100%-see the
User manual, and the EUT is a wireless device used in a mobile application, at least 20 cm from any body part
of the user or nearby persons; from the maximum EUT RF output power, the minimum mobile separation
distance, r =20cm, as well as the gain of the used antenna is 1.06dBi for WLAN, and the power drift from
Turn-up Procedure provide by manufacturer as following states, the RF power density can be obtained..

3.5. Antenna Information
BL-R8812AF1 can only use antennas certificated as follows provided by manufacturer;

Antenna type
Internal Antenna Identification Operate frequency Maximum antenna
and antenna
Identification in Internal photos band gain
number
1.92dBi(Max.) for
2.4GHz – 2.4835
Monopole 2.4G Band and
Antenna 1 2.4G/5G Wifi Chain 1 GHz
Antenna 4.0dBi(Max.) for
5GHz – 6 GHz
5G Band
1.92dBi(Max.) for
2.4GHz – 2.4835
2.4G/5G Wifi Chain 2 Monopole 2.4G Band and
Antenna 2 GHz
Bluetooth Antenna 4.0dBi(Max.) for
5GHz – 6 GHz
5G Band

Report No.: GTSR18080103-WLAN03 Page 8 of 9

4. Evaluation Result

4.1. Standalone MPE

2.4G ANT 1

Max Antenna
Max tune up
Target power Output Gain Power Density
Modulati power Limit
W/ tolerance power to (Numeric) at R=20cm Result
on Type tolerance(dB (mW/cm2)
(dBm) antenna (mW/cm2)
m)
(mW)
802.11b 17±2 19 79.4328 1.92 0.0246 1.0 Pass
802.11g 15±2 17 50.1187 1.92 0.0155 1.0 Pass
802.11n
14±2 16 39.8107 1.92 0.0123 1.0 Pass
(HT20)
802.11
14±2 16 39.8107 1.92 0.0123 1.0 Pass
n(HT40)

2.4G ANT 2

Max Antenna
Max tune up
Target power Output Gain Power Density
Modulati power Limit
W/ tolerance power to (Numeric) at R=20cm Result
on Type tolerance(dB (mW/cm2)
(dBm) antenna (mW/cm2)
m)
(mW)
802.11b 17±2 19 79.4328 1.92 0.0246 1.0 Pass
802.11g 15±2 17 50.1187 1.92 0.0155 1.0 Pass
802.11n
14±2 16 39.8107 1.92 0.0123 1.0 Pass
(HT20)
802.11
14±2 16 39.8107 1.92 0.0123 1.0 Pass
n(HT40)

5.8G ANT 1

Max Antenna
Target Max tune up
Output Gain Power Density
Modulation power W/ power Limit
power to (Numeric) at R=20cm Result
Type tolerance tolerance(dB (mW/cm2)
antenna (mW/cm2)
(dBm) m)
(mW)
802.11a 13±2 15 31.6228 4.0 0.0158 1.0 Pass
802.11n
12±2 14 25.1189 4.0 0.0126 1.0 Pass
(HT20)
802.11
12±2 14 25.1189 4.0 0.0126 1.0 Pass
n(HT40)
802.11
11±2 13 19.9526 4.0 0.0100 1.0 Pass
ac(VHT20)
802.11
10±2 12 15.8489 4.0 0.0079 1.0 Pass
ac(VHT40)
802.11
10±2 12 15.8489 4.0 0.0079 1.0 Pass
ac(VHT80)

Report No.: GTSR18080103-WLAN03 Page 9 of 9

5.8G ANT 2

Max Antenna
Target Max tune up
Output Gain Power Density
Modulation power W/ power Limit
power to (Numeric) at R=20cm Result
Type tolerance tolerance(dB (mW/cm2)
antenna (mW/cm2)
(dBm) m)
(mW)
802.11a 13±2 15 31.6228 4.0 0.0158 1.0 Pass
802.11n
12±2 14 25.1189 4.0 0.0126 1.0 Pass
(HT20)
802.11n
12±2 14 25.1189 4.0 0.0126 1.0 Pass
(HT40)
802.11
11±2 13 19.9526 4.0 0.0100 1.0 Pass
ac(VHT20)
802.11
10±2 12 15.8489 4.0 0.0079 1.0 Pass
ac(VHT40)
802.11
10±2 12 15.8489 4.0 0.0079 1.0 Pass
ac(VHT80)

MIMO:

Power Density Power Density Power Density Limit Result
Modulation at R=20cm at R=20cm at R=20cm (mW/cm2)
Type (mW/cm2) (mW/cm2) (mW/cm2)
ANT 1 ANT 2 ANT 1+ANT 2
2.4G
802.11n 0.0246 0.0246 0.0492 1.0 Pass
(HT 20)
5.8G
802.11n 0.0158 0.0158 0.0316 1.0 Pass
(HT 20)
2.4G+5.8G 0.0404 0.0404 0.0808 1.0 Pass

Remark: only recorded the worst mode in this form.

4.2. Simultaneous transmission MPE Considerations

According to KDB447498 :For mobile exposure host platform to qualify for simultaneous transmission MPE
test exclusion, all transmitters and antennas in the host must be either evaluated for MPE compliance, by
measurement or computational modeling, or qualify for the standalone MPE test exclusion in section 7.1.
Simultaneous transmission MPE test exclusion applies when the sum of the MPE ratios for all simultaneous
transmitting antennas incorporated in a host device, based on the calculated/estimated, numerically modeled
or measured field strengths or power density, is ≤ 1.0.
This means that:
∑ of MPE ratios ≤ 1.0

The EUT is Not Applicable.

5. Conclusion
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment.

.....................End of Report.........................

Document Created: 2018-09-26 14:44:53
Document Modified: 2018-09-26 14:44:53

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