RF Exposure Info (MPE)

FCC ID: JNZNR0017

RF Exposure Info

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FCCID_4149452

                                                           RF Exposure Report

                       Report No.: SA180928E04

                            FCC ID: JNZNR0017

                       Test Model: N-R0017

                 Received Date: Sep. 28, 2018

                         Test Date: Oct. 20, 2018

                     Issued Date: Jan. 14, 2019


                         Applicant: LOGITECH FAR EAST LTD.

                          Address: #2 Creation Rd. 4, Science-Based Ind. Park Hsinchu Taiwan, R.O.C.


                        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.

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Reference No.: 180928E04


                                                                   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 ...................................................................................................................................... 5
    2.5      Calculation Result of Maximum Conducted Power ............................................................................. 6




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                                           Release Control Record


Issue No.              Description                                         Date Issued
SA180928E04            Original release.                                   Jan. 14, 2019




Report No.: SA180928E04                       Page No. 3 / 6        Report Format Version: 6.1.1
Reference No.: 180928E04


1    Certificate of Conformity


            Product: Universal hub

              Brand: Logitech

         Test Model: N-R0017

    Sample Status: ENGINEERING SAMPLE

          Applicant: LOGITECH FAR EAST LTD.

          Test Date: Oct. 20, 2018

         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:      Jan. 14, 2019
                                Phoenix Huang / Specialist




     Approved by :                                               ,   Date:      Jan. 14, 2019
                                  May Chen / Manager




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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 20cm away from the body of the user. So,
this device is classified as Mobile Device.


2.4     Antenna Gain


                   Antenna Gain
    Transmitter                               Frequency range
                   with cable loss                                     Antenna Type     Antenna Connector
      Circuit                                      (GHz)
                        (dBi)
                         3.5                    2.4~2.4835
      Chain 0              3.8                   5.15~5.35           Monopole (PCB)               NA
                           4                     5.5~5.85
                           2.9                  2.4~2.4835
      Chain 1              3                     5.15~5.35           Monopole (PCB)               NA
                           4.5                   5.5~5.85




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2.5     Calculation Result of Maximum Conducted Power


                   Evaluation
  Operation                       Max Power    Antenna Gain    Distance   Power Density       Limit
                   Frequency
   Mode                             (mW)           (dBi)         (cm)       (mW/cm2)        (mW/cm2)
                     (MHz)
WLAN 2.4GHz           2437         242.103            3.5        20         0.10783               1
     WLAN
                      5180         30.409             3.8        20         0.01451               1
    (UNII-1)
     WLAN
                      5300         29.107             3.8        20         0.01389               1
  (U-NII-2A)
     WLAN
                      5580         37.931             4.5        20         0.02127               1
  (UNII-2C)
     WLAN
                      5755         36.392             4.5        20         0.02040               1
   (U-NII-3)
      BT-EDR          2402          4.592             3.5        20         0.00205               1

      BT-LE           2440          2.518             3.5        20         0.00112               1



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 + Bluetooth = 0.10783 / 1 + 0.00205 / 1 = 0.10988
WLAN 5GHz + Bluetooth = 0.02127 / 1 + 0.00205 / 1 = 0.02332
Therefore the maximum calculations of above situations are less than the “1” limit.



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Document Created: 2019-06-05 10:06:12
Document Modified: 2019-06-05 10:06:12

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