B010001 eero Model B010001 Wi-Fi Router/Access point RF Exposure Info Emissions & Immunity Test Report eero .

eero . eero Model B010001 Wi-Fi Router/Access point

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RF Exposure Exhibit
EUT Name: Wi-Fi Router
Model No.: B010001 (USA), B010002 (IC)
CFR Part 1.1310 and RSS 102
Prepared for:
eero inc
500 Howard Street, Suite 900
San Francisco, CA 94105
Tel: (415) 738-7972
Prepared by:
TUV Rheinland of North America, Inc.
1279 Quarry Lane
Pleasanton, CA 94566
Tel: (925) 249-9123
Fax: (925) 249-9124
http://www.tuv.com/
Report/Issue Date:
Report Number:
May 09, 2017
MPE Calculation
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 1 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
RF Exposure Limit
Contents
RF Exposure Exhibit ................................................................................................................. 1
Test Methodology .................................................................................................................... 3
1.1
RF Exposure Limit ..................................................................................................................... 3
1.2
EUT Operating Condition .......................................................................................................... 5
1.3
MPE calculation .......................................................................................................................... 5
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
1.3.7
Antenna Gain ...........................................................................................................................................5
Conducted Output Power .........................................................................................................................5
Output Power into Antenna & RF Exposure value (Non-Beamforming Mode) ......................................6
RF Exposure value when 3 radios operating simultaneously (Non-Beamforming Mode) .................... 12
Output Power into Antenna & RF Exposure value (Beamforming Mode) ............................................ 13
RF Exposure value when 3 radios operating simultaneously (Beamforming Mode)............................. 19
Sample Calculation ................................................................................................................................ 20
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 2 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
RF Exposure Limit
Test Methodology
In this document, we evaluate the RF Exposure to human body due the intentional transmission from the
transmitter (EUT). The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is
followed. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate
the distance, away from the product, where the limit of MPE is reached.
Although the Friis transmission formula is a far field assumption, the calculated result of that is an overprediction for near field power density. We will take that as the worst case to specify the safety range.
1.1
RF Exposure Limit
According to FCC 1.1310 table 1: The criteria listed in the following table shall be used to evaluate the
environmental impact of human exposure to radio-frequency (RF) radiation as specified in 1.1307(b)
LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE)
Frequency
Range
(MHz)
Electric Field
Strength (V/m)
Magnetic Field
Strength (A/m)
Power Density
(mW/cm2)
Average Time
(minutes)
(A)Limits For Occupational / Control Exposures
0.3-1.34
614
1.63
*(100)
1.34-30
1842/f
4.89/f
*(900/f²)
30-300
61.4
0.163
1.0
30-1500
…
…
F/300
1500-100000
…
…
1.0
(B)Limits For General Population / Uncontrolled Exposure
0.3-1.34
614
1.63
*(100)
30
1.34-30
824/f
2.19/f
*(180/f²)
30
30-300
27.5
0.073
0.2
30
30-1500
…
…
F(MHz)/1500MHz
30
1500-100000
…
…
1.0
30
F = Frequency in MHz
*=Plane wave equivalent density
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 3 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
RF Exposure Limit
According to RSS-102 Issue 5: The criteria listed in the following table shall be used to evaluate the
environmental impact of human exposure to radio-frequency (RF) radiation
RF FIELD STRENGTH LIMITS FOR DEVICES USED BY THE GENERAL PUBLIC
(UNCONTROLLED ENVIRONMENT)
Frequency Range
(MHz)
0.003-10 21
0.1-10
1.1-10
10-20
20-48
48-300
300-6000
Power Density Reference Period
(minutes)
(W/m2)
Electric Field
(V/m rms)
Magnetic Field
(A/m rms)
83
90
0.73/ ƒ
6**
6**
0.0728
87/ ƒ
0.5
27.46
58.07/ ƒ 0.25
22.06
3.142 ƒ 0.3417
0.1540/ ƒ 0.25
8.944/ ƒ 0.5
1.291
0.05852
0.008335 ƒ 0.3417
0.02619ƒ0.6834
6000-15000
61.4
0.163
10
15000-150000
61.4
0.163
10
150000-300000
0.158 ƒ 0.5
4.21 x 10-4 ƒ 0.5
Instantaneous*
6.67 x 10-5 ƒ
616000/ ƒ 1.2
616000/ ƒ 1.2
Note: ƒ is frequency in MHz.
*Based on nerve stimulation (NS).
** Based on specific absorption rate (SAR).
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 4 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
1.2
EUT Operating Condition
EUT Operating Condition
The Model B010001 (USA), B010002 (IC), is a Wi-Fi router for the home capable of operating in the 2.4
GHz and 5 GHz frequency bands over 20 MHz, 40 MHz and 80 MHz channels.
1.3
MPE calculation
1.3.1
Antenna Gain
The antennas used are:
1. Bluetooth LE and Thread (Zigbee) 2.4 GHz Flex PCB Antenna peak gain: +3.09 dBi or 2.04
(numeric).
2. Wifi 2.4 GHz Flex PCB Antenna peak gain: +5.43 dBi or 3.49 (numeric). Total directional gain:
7.68 dBi
3. Wifi 5.15-5.25 GHz Flex PCB Antenna peak gain: +4.58 dBi or 2.87 (numeric). Total directional
gain: 6.84 dBi
4. Wifi 5.725-5.850 GHz Flex PCB Antenna peak gain: +3.84 dBi or 2.42 (numeric). Total
directional gain: 6.58 dBi
1.3.2
Conducted Output Power
1. Bluetooth LE 2.480 GHz, TUV Test Report 31761398.001, maximum power: 11.82 dBm (15.21
mW)
2. Thread 2.405 GHz, TUV Test Report 31761398.001, maximum power: 18.40 dBm (69.18 mW)
3. Wifi 2.452 GHz, TUV Test Report 31761398.001, total power (summed 2 chains) for nonbeamforming: 29.73 dBm (939.72 mW) and for beamforming: 2.462 GHz at 28.19 dBm (659.17
mW)
4. Wifi 5.23 GHz, TUV Test Report 31761399.001, total power for FCC (summed 2 chains): 29.05
dBm (803.53 mW) and for beamforming: 29.05 dBm (803.53 mW)
5. Wifi 5.21 GHz, TUV Test Report 31761399.001, total power for RSS (summed 2 chains): 18.18
dBm (65.77 mW) and for beamforming: 5.19 GHz at 15.98 dBm (39.63 mW)
6. Wifi 5.785 GHz, TUV Test Report 31761402.001, total power (summed 2 chains): 29.24 dBm
(839.46 mW) and for beamforming: 29.24 dBm (839.46 mW)
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 5 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
1.3.3 Output Power into Antenna & RF Exposure value (Non-Beamforming Mode)
Calculations for this report are based on highest power measurement (summed 2 chains) and its antenna
gain, therefore 2.452 GHz. Result below is Non-Beamforming Mode.
FCC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 6 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
IC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 7 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
Calculations for this report are based on highest power measurement (summed 2 chains) and its antenna
gain, therefore 5.23 GHz. Result below is Non-Beamforming Mode.
FCC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 8 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
IC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 9 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
Calculations for this report are based on highest power measurement (summed 2 chains) and its antenna
gain, therefore 5.785 GHz. Result below is Non-Beamforming Mode.
FCC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 10 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
IC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 11 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
1.3.4 RF Exposure value when 3 radios operating simultaneously (Non-Beamforming
Mode)
Non-Beamforming Exposure result (FCC)
Operating Frequency (MHz)
Power Density (mW/cm²)
2452
0.41774
5230
0.29370
5785
0.25877
0.97022
Total Power Density (mW/cm²)
1.00000
Uncontrolled Exposure Limit
(mW/cm²)
-0.02978
Margin (mW/cm²)
Note: Minimum distance from the user must be at 25 cm
Non-Beamforming Exposure result (IC)
Operating
Power Density
Frequency (MHz)
(W/cm²)
Limit (W/cm²)
Ratio
2452
3.862277
5.426675
0.711721
5210
0.222251
9.082855
0.024469
5785
2.392453
9.756490
0.245217
0.981407
∑ ratio
Note: 1. The MPE calculation for simultaneous transmission is less than 1.
2. Minimum distance from the user must be at 26 cm
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 12 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
1.3.5 Output Power into Antenna & RF Exposure value (Beamforming Mode)
Calculations for this report are based on highest power measurement (summed 2 chains) and its antenna
gain, therefore 2.462 GHz. Result below is Beamforming Mode.
FCC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 13 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
IC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 14 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
Calculations for this report are based on highest power measurement (summed 2 chains) and its antenna
gain, therefore 5.23 GHz. Result below is Beamforming Mode.
FCC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 15 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
IC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 16 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
Calculations for this report are based on highest power measurement (summed 2 chains) and its antenna
gain, therefore 5.785 GHz. Result below is Beamforming Mode.
FCC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 17 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
IC:
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 18 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
1.3.6 RF Exposure value when 3 radios operating simultaneously (Beamforming Mode)
Beamforming Mode Exposure result (FCC)
Frequency (MHz)
Power Density (mW/cm²)
2462
0.30025
5230
0.30164
5785
0.34873
0.95063
Total Power Density (mW/cm²)
1.00000
Uncontrolled Exposure Limit
(mW/cm²)
-0.04937
Margin (mW/cm²)
Note: Minimum distance from the user must be at 32 cm
Beamforming Mode Exposure result (IC)
Operating
Power Density
Limit (W/cm²)
Frequency (MHz)
(W/cm²)
Ratio
2462
3.416234
5.441790
0.627778
5190
0.169257
9.059013
0.018684
5785
3.377129
9.756490
0.346142
0.992603
∑ ratio
Note: 1. The MPE calculation for simultaneous transmission is less than 1.
2. Minimum distance from the user must be at 30 cm
As originally tested, the EUT was found to be compliant to the requirements of the test standard(s).
FCC: Minimum distance from the user must be at 32 cm.
IC: Minimum distance from the user must be at 30 cm.
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 19 of 20
TUV Rheinland
1279 Quarry Lane, Ste. A, Pleasanton, CA 95466
Tel: (925) 249-9123, Fax: (925) 249-9124
MPE calculation
1.3.7 Sample Calculation
The Friss transmission formula: Pd = (Pout*G) / (4*π*R2)
Where;
Pd = power density in mW/cm2
Pout = output power to antenna in mW
G = gain of antenna in linear scale
π ≈ 3.1416
R = distance between observation point and center of the radiator in cm
Ref. : David K. Cheng, Field and Wave Electromagnetics, Second Edition, Page 640, Eq. (11-133).
Report Number: MPE Calculation
Model: B010001 (USA), B010002 (IC)
EMC / Rev 1.0
FCC ID: 2AEM4-B010001, IC: 20631-1117160
Page 20 of 20
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Document ID3402994
Application IDnofmgAh6aq9bgSHm28wBmQ==
Document DescriptionRF Exposure
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize50.84kB (635519 bits)
Date Submitted2017-05-25 00:00:00
Date Available2017-05-25 00:00:00
Creation Date2017-05-12 14:14:08
Producing SoftwareMicrosoft® Word 2013
Document Lastmod2017-05-12 14:14:08
Document TitleEmissions & Immunity Test Report
Document CreatorMicrosoft® Word 2013
Document Author: Jeremy Luong

Source Exif Data [exif.tools]:
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.5
Linearized                      : No
Page Count                      : 20
Language                        : en-US
Tagged PDF                      : Yes
Title                           : Emissions & Immunity Test Report
Author                          : Jeremy Luong
Creator                         : Microsoft® Word 2013
Create Date                     : 2017:05:12 14:14:08-07:00
Modify Date                     : 2017:05:12 14:14:08-07:00
Producer                        : Microsoft® Word 2013