RF exposure info (MPE) rev3

FCC ID: I88LTE7461-M602

RF Exposure Info

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FCCID_4198019

                                                           RF Exposure Report

                       Report No.: SA181213E15

                            FCC ID: I88LTE7461-M602

                       Test Model: LTE7461-M602

                 Received Date: Dec. 13, 2018

                         Test Date: Jan. 10, 2019

                     Issued Date: Mar. 08, 2019


                         Applicant: Zyxel Communications Corporation

                          Address: No.2 Industry East RD. IX, Hsinchu Science Park, Hsinchu 30075, Taiwan


                        Issued By: Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch
                                   Hsin Chu Laboratory
                    Lab Address: E-2, No.1, Li Hsin 1st Road, Hsinchu Science Park, Hsinchu City 300,
                                 Taiwan R.O.C.
            Test Location: E-2, No.1, Li Hsin 1st Road, Hsinchu Science Park, Hsinchu City 300,
                           Taiwan R.O.C.
       FCC Registration /
                           723255 / TW2022
      Designation Number:




This report is for your exclusive use. Any copying or replication of this report to or for any other person or entity, or use of our name or trademark, is permitted
only with our prior written permission. This report sets forth our findings solely with respect to the test samples identified herein. The results set forth in this
report are not indicative or representative of the quality or characteristics of the lot from which a test sample was taken or any similar or identical product
unless specifically and expressly noted. Our report includes all of the tests requested by you and the results thereof based upon the information that you
provided to us. You have 60 days from date of issuance of this report to notify us of any material error or omission caused by our negligence, provided,
however, that such notice shall be in writing and shall specifically address the issue you wish to raise. A failure to raise such issue within the prescribed time
shall constitute your unqualified acceptance of the completeness of this report, the tests conducted and the correctness of the report contents. Unless specific
mention, the uncertainty of measurement has been explicitly taken into account to declare the compliance or non-compliance to the specification. The report
must not be used by the client to claim product certification, approval, or endorsement by any government agencies.

Report No.: SA181213E15                                              Page No. 1 / 8                                             Report Format Version: 6.1.1


                                                                    Table of Contents
Release Control Record .................................................................................................................................. 3
1         Certificate of Conformity ...................................................................................................................... 4
2         RF Exposure .......................................................................................................................................... 5
    2.1      Limits for Maximum Permissible Exposure (MPE) .............................................................................. 5
    2.2      MPE Calculation Formula ................................................................................................................... 5
    2.3      Classification ....................................................................................................................................... 5
    2.4      Antenna Gain ...................................................................................................................................... 6
    2.5      Calculation Result of Maximum Conducted Power ............................................................................. 7
Appendix .......................................................................................................................................................... 8




Report No.: SA181213E15                                               Page No. 2 / 8                                             Report Format Version: 6.1.1


                                          Release Control Record


Issue No.             Description                                         Date Issued
SA181213E15           Original release.                                   Mar. 08, 2019




Report No.: SA181213E15                      Page No. 3 / 8        Report Format Version: 6.1.1


1    Certificate of Conformity


            Product: 4G LTE-A Outdoor Router

              Brand: ZYXEL

        Test Model: LTE7461-M602

    Sample Status: ENGINEERING SAMPLE

          Applicant: Zyxel Communications Corporation

          Test Date: Jan. 10, 2019

         Standards: FCC Part 2 (Section 2.1091)

                          KDB 447498 D01 General RF Exposure Guidance v06
                          IEEE C95.1-1992



The above equipment has been tested by Bureau Veritas Consumer Products Services (H.K.) Ltd.,
Taoyuan Branch, and found compliance with the requirement of the above standards. The test record, data
evaluation & Equipment Under Test (EUT) configurations represented herein are true and accurate accounts
of the measurements of the sample’s EMC characteristics under the conditions specified in this report.




      Prepared by :                                             ,   Date:       Mar. 08, 2019
                                Claire Kuan / Specialist




     Approved by :                                              ,   Date:       Mar. 08, 2019
                                 May Chen / Manager




Report No.: SA181213E15                        Page No. 4 / 8                        Report Format Version: 6.1.1


2      RF Exposure

2.1     Limits for Maximum Permissible Exposure (MPE)

    Frequency Range          Electric Field     Magnetic Field       Power Density      Average Time
         (MHz)              Strength (V/m)      Strength (A/m)         (mW/cm2)           (minutes)
                             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
       300-1500                   …                    …                 f/1500               30
      1500-100,000                …                    …                  1.0                 30

f = Frequency in MHz ; *Plane-wave equivalent power density



2.2     MPE Calculation Formula

Pd = (Pout*G) / (4*pi*r2)
where
Pd = power density in mW/cm 2
Pout = output power to antenna in mW
G = gain of antenna in linear scale
Pi = 3.1416
R = distance between observation point and center of the radiator in cm



2.3     Classification

The antenna of this product, under normal use condition, is at least 30cm away from the body of the user. So,
this device is classified as Mobile Device.




Report No.: SA181213E15                          Page No. 5 / 8                      Report Format Version: 6.1.1


2.4     Antenna Gain


                          Antenna
       Chain No              Net      Frequency range    Antenna Type        Connector Type
                          Gain(dBi)
      WLAN-ANT0               6        2.4 ~ 2.4835GHz      PIFA                   iPEX
      WLAN-ANT1               5        2.4 ~ 2.4835GHz      PIFA                   iPEX
                              9       2500 ~ 2570 MHz
                             3.5        698 ~ 716 MHz
                              3         777 ~ 787 MHz
       WWAN_0
                              8       1850 ~ 1915 MHz       Dipole                 iPEX
       (TX&RX)
                             3.6        814 ~ 849 MHz
                              9       2305 ~ 2315 MHz
                              6       1710 ~ 1780 MHz
                              9       2500 ~ 2570 MHz
                             3.5        698 ~ 716 MHz
                              3         777 ~ 787 MHz
       WWAN_1
                              8       1850 ~ 1915 MHz       Dipole                 iPEX
       (RX only)
                             3.6        814 ~ 849 MHz
                              9       2305 ~ 2315 MHz
                              6       1710 ~ 1780 MHz




Report No.: SA181213E15                 Page No. 6 / 8               Report Format Version: 6.1.1


2.5    Calculation Result of Maximum Conducted Power


For WLAN
                   Evaluation
  Operation                       Max Power      Antenna Gain       Distance   Power Density       Limit
                   Frequency
   Mode                             (mW)             (dBi)            (cm)       (mW/cm2)        (mW/cm2)
                     (MHz)
WLAN 2.4GHz           2437          331.073            8.52           30         0.20820               1
Note:
2.4GHz: Directional gain = 10 log[(10G0/20 + 10G1/20)2 / 2] =8.52


For WWAN 3G/LTE <Worst case> (FCC ID: XMR201807EG06A)
                   Evaluation
  Operation                       Max Power      Antenna Gain       Distance   Power Density       Limit
                   Frequency
   Mode                             (mW)             (dBi)            (cm)       (mW/cm2)        (mW/cm2)
                     (MHz)
 LTE Band 7          2502.5           416              9.00           30         0.29217               1
Note: *Limit of Power Density = F/1500




Conclusion:
The formula of calculated the MPE is:
CPD1 / LPD1 + CPD2 / LPD2 + ……etc. < 1
CPD = Calculation power density
LPD = Limit of power density


WLAN 2.4GHz + WWAN = 0.20820 / 1 + 0.29217 / 1 = 0.50037
Therefore the maximum calculations of above situations are less than the “1” limit.




Report No.: SA181213E15                         Page No. 7 / 8                       Report Format Version: 6.1.1


     Appendix
3G/LTE module
MPE Evaluation for FCC ID: XMR201807EG06A Module

                          Transmitter Range                       Antenna    Power Density
         Equipment                                Maximum
 Mode                          (MHz)                               Gain        (mW/cm2)              Ratio
          Category
                          Start       Stop     (dBm)       (W)     (dBi)     Vaule      Limit
              Band II     1852.4     1907.6    25.09      0.323     8       0.1802        1        0.18020
 UMTS      Band IV        1712.4     1752.6      25       0.316     6       0.11123       1        0.11123
              Band V      826.4      846.6     23.87      0.244     3.6     0.04942    0.5509      0.08971
              Band 2      1850.7     1909.3    25.71      0.372     8       0.20753       1        0.20753
              Band 4      1710.7     1754.3    25.31       0.34     6       0.11968       1        0.11968
              Band 5      824.7      848.3     23.93      0.247     3.6     0.05003    0.5498      0.09100
              Band 7      2502.5     2567.5    26.19      0.416     9       0.29217       1        0.29217
  LTE      Band 12        699.7      715.3     24.35      0.272     3.5     0.05384    0.4664      0.11544
           Band 13        779.5      784.5     24.22      0.264     3       0.04657    0.5196      0.08963
           Band 25        1850.7     1914.3    25.71      0.372     8       0.20753       1        0.20753
           Band 26        814.7      823.3     23.89      0.245     3.6     0.04963    0.5431      0.09138
           Band 66        1710.7     1719.3    25.31       0.34     6       0.11968       1        0.11968


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Report No.: SA181213E15                       Page No. 8 / 8                          Report Format Version: 6.1.1



Document Created: 2019-03-12 15:29:47
Document Modified: 2019-03-12 15:29:47

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