FGW-GR240BG Fiber Gateway 4x4 RF Exposure Info Emissions & Immunity Test Report Altice Labs, S.A.

Altice Labs, S.A. Fiber Gateway 4x4

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RF Exposure Exhibit
EUT Name: FIBERGATEWAY
Model No.: GR240BG FCC ID: 2ACJF-FGW-GR240BG
CFR 47 Part 15.247 and Part 15.407
Prepared for:
Altice Labs, SA
Rua Eng. Ferreira Pinto Basto
3810-106 Aveiro, Portugal
Tel: 351234403200
Prepared by:
Intertek
1365 Adams Court
Menlo Park, CA 94025 USA
Tel: (650) 463-2900
Fax: (650) 463-2901
Report/Issue Date:
October 23, 2017
Page 1 of 5
EUT: FiberGateway
EMC / Rev 10/23/2017
FCCID: 2ACJF-FGW-GR240BG
RF Exposure Limit
Contents
RF Exposure Exhibit ................................................................................................................. 1
Test Methodology .................................................................................................................... 3
1.1
RF Exposure Limit ..................................................................................................................... 3
1.2
EUT Operating Condition .......................................................................................................... 3
1.2.1
1.3
1.3.1
1.3.2
1.3.3
Classification ...........................................................................................................................................4
Test Results ............................................................................................................................... 4
Antenna Gain ...........................................................................................................................................4
Mobile Configuration ..............................................................................................................................4
Sample Calculation ..................................................................................................................................5
Page 2 of 5
EUT: FiberGateway
EMC / Rev 10/23/2017
FCCID: 2ACJF-FGW-GR240BG
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
…
300 - 1500
1500 - 100,000
…
F/300
…
…
(B)Limits For General Population / Uncontrolled Exposure
300 - 1500
1500 - 100,000
…
…
F/1500
…
…
1.0
30
F = Frequency in MHz
1.2
EUT Operating Condition
Altice Labs, SA supplied the following description of the EUT:
The FiberGateway GR240AG is an ONT (Optical Network Terminal) solution based on Rec. ITU-T
G.984.x that supports triple play services (high speed internet, voice and video) which are deployed over
Ethernet and Wi-Fi interfaces. GEM (GPON encapsulation method) is employed to adapt technologies.
This system can be used in triple play service delivery network solutions. It includes Home Gateway
functionalities, 4 GbE ports and Wi-Fi Dual-Band Concurrent (2.4 GHz bgn 4x4 + 5 GHz anac 4x4) for
internet access and IPTV, 2 FXS ports for voice and 1 USB 2.0 port.
Page 3 of 5
EUT: FiberGateway
EMC / Rev 10/23/2017
FCCID: 2ACJF-FGW-GR240BG
Test Results
The software provided by Manufacturer enabled the EUT to transmit data at lowest, middle and highest
channel individually. Software provided enables to transmit on multi channels simultaneously.
1.2.1 Classification
EUT is installed inside a mobile host device. The antenna of the product, under normal use condition, is at
least 20cm away from the body of the user and accessible to the end user. Warning statement to the user
for keeping at least 20cm or more separation distance with the antenna should be included in user’s
manual.
1.3
Test Results
1.3.1 Antenna Gain
2.4GHz Band combined highest gain = 3.9dBi, see test report 103224477MPK-002A page # 8
5GHz Band = 4.9dBi see test report 103224477MPK-003A Page #8
1.3.2
Mobile Configuration
Calculations for this report are based on highest power measured for each band.
dBm
Antenna
gain
(Max)
dBm
29.98
3.9
33.88
Output Power
Band
Mode
2400 –
2483.5MHz
802.11b, g &
HT20
51505250MHz
802.11a,HT20,
H40, ac
20.67
57255750MHz
802.11a,HT20,
H40, ac
29.89
EIRP/ERP
# of Channels ON
dBm
2.44
33.88
3.013
34.79
5.453
37.37
25.57
4.9
34.79
Totals:
Note 1:
Total EIRP
Stations using 2400 to 2483.5MHz Power limited 1 Watt Max gain of antenna 6dBi;
Note2: Out of two 5GHz band only one will Transmitting at a time. For the band 5.725 – 5.85
GHz, the maximum conducted output power over the frequency band of operation shall not exceed
1 W. In addition, the maximum power spectral density shall not exceed 30 dBm in any 500-kHz
band.
Page 4 of 5
EUT: FiberGateway
EMC / Rev 10/23/2017
FCCID: 2ACJF-FGW-GR240BG
Test Results
Calculating the Power Density at 20cm
The highest simultaneous power measured power is +37.37dBm or 5.453W.
Using the Friss transmission formula, the EIRP is Pout*G, and R is 20cm.
Pd= EIRP/(1600π)
Pd = (5453) / (1600π) = 1.08 mW/ cm^2, which is above the limit. Limit is 1.0mWatts/ cm^2
Calculating the distance at which Power density equal the limit
Calculation uses the free space transmission formula:
S = (PG)/(4 πd2)
Where: S is power density (W/m2), P is output power (W), G is antenna gain relative to isotropic, d is
separation distance from the transmitting antenna (m).
d = Sqroot (PG/4π) d in Cm when PG in mW/cm^2
permissible power density is 1.0 mW/cm^2
Limit
for
Frequency
above 1500MHz
d = Sqroot {5453/4π (1)}
d = 20.88cm
The device should used at least 21cm away from the body of the user and accessible to the end user.
1.3.3 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).
Page 5 of 5
EUT: FiberGateway
EMC / Rev 10/23/2017
FCCID: 2ACJF-FGW-GR240BG
Download: FGW-GR240BG Fiber Gateway 4x4 RF Exposure Info Emissions & Immunity Test Report Altice Labs, S.A.
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Document ID3621271
Application ID/86P6zig3/Ttc47DA/qSzQ==
Document DescriptionRF Exposure evaluation
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize40.57kB (507125 bits)
Date Submitted2017-10-28 00:00:00
Date Available2017-10-28 00:00:00
Creation Date2017-10-23 15:37:00
Producing SoftwareMicrosoft® Word 2016
Document Lastmod2017-10-23 15:37:00
Document TitleEmissions & Immunity Test Report
Document CreatorMicrosoft® Word 2016
Document Author: Jeremy Luong

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