RF Exposure Info (MPE)

FCC ID: 2AHBN-AP43

RF Exposure Info

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FCCID_4326237

                                                           RF Exposure Report

                       Report No.: SA190211C09

                             FCC ID: 2AHBN-AP43

                       Test Model: AP43E, AP43

                 Received Date: Feb. 11, 2019

                         Test Date: Feb. 21 ~ Apr. 16, 2019

                     Issued Date: Apr. 18, 2019


                         Applicant: Mist Systems, Inc.

                          Address: 1601 South De Anza Blvd. Suite 248 Cupertino California United States
                                   95014

                        Issued By: Bureau Veritas Consumer Products Services (H.K.) Ltd., Taoyuan Branch

                    Lab Address: No. 47-2, 14th Ling, Chia Pau Vil., Lin Kou Dist., New Taipei City, Taiwan
                                 (R.O.C.)
                  Test Location: No. 19, Hwa Ya 2nd Rd., Wen Hwa Vil., Kwei Shan Dist., Taoyuan City
                                 33383, TAIWAN (R.O.C.)
         FCC Registration / 788550 / TW0003
       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 ourfindings 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 TAF or any government agencies.


Report No.: SA190211C09                                              Page No. 1 / 7                                             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
3         Calculation Result of Maximum Conducted Power........................................................................... 6




Report No.: SA190211C09                                              Page No. 2 / 7                                              Report Format Version: 6.1.1


                                         Release Control Record


Issue No.                 Description                                    Date Issued
SA190211C09           Original release                                   Apr. 18, 2019




Report No.: SA190211C09                     Page No. 3 / 7        Report Format Version: 6.1.1


1    Certificate of Conformity


            Product: Premium 802.11ax WiFi and BLE AP

              Brand: Mist

        Test Model: AP43E, AP43

    Sample Status: Engineering sample

          Applicant: Mist Systems, Inc.

          Test Date: Feb. 21 ~ Apr. 16, 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 RF characteristics under the conditions specified in this report.




      Prepared by :                                              , Date:         Apr. 18, 2019
                             Celine Chou / Senior Specialist




     Approved by :                                               , Date:         Apr. 18, 2019
                             Bruce Chen / Project Engineer




Report No.: SA190211C09                         Page No. 4 / 7                        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

       300-1500                 …                     …                   F/1500                  30

     1500-100,000               …                     …                    1.0                    30
F = Frequency in MHz

2.2 MPE Calculation Formula
Pd = (Pout*G) / (4*pi*r2)
where
Pd = power density in mW/cm2
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 37cm away from the body of the user. So,
this device is classified as Mobile Device.




Report No.: SA190211C09                       Page No. 5 / 7                         Report Format Version: 6.1.1


3    Calculation Result of Maximum Conducted Power
WLAN
Frequency Band            Max Power       Antenna Gain            Distance   Power Density           Limit
    (MHz)                   (dBm)             (dBi)                 (cm)       (mW/cm2)            (mW/cm2)
                                      Internal antenna + Eth6 Radio, CDD Mode

    5180-5240               24.17             11.45                 37          0.212                   1

    5745-5825               25.94             11.45                 37          0.319                   1

                               Internal antenna + Eth6 Radio, Beamforming Mode

    5180-5240               23.74             11.45                 37          0.192                   1

    5745-5825               23.72             11.45                 37          0.191                   1

                                      Internal antenna + Eth7 Radio, CDD Mode

    2412-2462               21.86              5.51                 37          0.032                   1

    5180-5240               25.38              8.46                 37          0.141                   1

    5745-5825               25.43              8.46                 37          0.142                   1

                                      Internal antenna + Eth8 Radio, CDD Mode

    2412-2462               25.44              9.37                 37          0.176                   1

    5745-5825               28.52             10.96                 37          0.516                   1

                               Internal antenna + Eth8 Radio, Beamforming Mode

    2412-2462               25.10              9.37                 37          0.163                   1

    5745-5825               24.53             10.96                 37          0.206                   1

                                    External antenna + Eth6 Radio, CDD Mode

    5180-5240               24.17             12.02                 37          0.242                   1

    5745-5825               25.94             12.02                 37          0.363                   1

                               External antenna + Eth6 Radio, Beamforming Mode

    5180-5240               23.74             12.02                 37          0.219                   1

    5745-5825               23.72             12.02                 37          0.218                   1

                                    External antenna + Eth7 Radio, CDD Mode

    2412-2462               21.88              7.01                 37          0.045                   1

    5180-5240               25.38              9.01                 37          0.160                   1

    5745-5825               25.43              9.01                 37          0.162                   1

                                    External antenna + Eth8 Radio, CDD Mode

    2412-2462               25.44             10.02                 37          0.204                   1

                               External antenna + Eth8 Radio, Beamforming Mode

    2412-2462               25.10             10.02                 37          0.189                   1


Report No.: SA190211C09                          Page No. 6 / 7                         Report Format Version: 6.1.1


BT LE
Frequency Band            Max Power       Antenna Gain              Distance      Power Density                Limit
    (MHz)                   (dBm)             (dBi)                   (cm)          (mW/cm2)                 (mW/cm2)
                                          BT-Omni antenna + BT LE Radio

    2402-2480               6.39                0.1                   37              0.0003                      1

                                       BT-Directional antenna + BT LE Radio

    2402-2480               6.39                4.5                   37                  0.001                   1
Note: Determining compliance based on the results of the compliance measurement, not taking into account
measurement instrumentation uncertainty.

Internal antenna + Eth6 Radio
1. 5GHz: Directional gain = 10 log[(10G1 /20 + 10G2 /20 + ... + 10GN /20)2/4]= 11.45dBi
Internal antenna + Eth7 Radio
1. 2.4GHz: Directional gain = 10 log[(10G1 /20 + 10G2 /20 + ... + 10GN /20)2/2]= 5.51dBi
2. 5GHz: Directional gain = 10 log[(10G1 /20 + 10G2 /20 + ... + 10GN /20)2/2]= 8.46dBi
Internal antenna + Eth8 Radio
1. 2.4GHz: Directional gain = 10 log[(10G1 /20 + 10G2 /20 + ... + 10GN /20)2/4]= 9.37dBi
2. 5GHz: Directional gain = 10 log[(10G1 /20 + 10G2 /20 + ... + 10GN /20)2/4]= 10.96dBi
External antenna + Eth6 Radio
1. 5GHz: Directional gain = 6dBi + 10log(4) = 12.02dBi
External antenna + Eth7 Radio
1. 2.4GHz: Directional gain = 4dBi + 10log(2) = 7.01dBi
2. 5GHz: Directional gain = 6dBi + 10log(2) = 9.01dBi
External antenna + Eth8 Radio
1. 2.4GHz: Directional gain = 4dBi + 10log(4) = 10.02dBi


Conclusion:
The Eth6 Radio & Eth7 Radio & Eth8 Radio & BT LE Radio can transmit simultaneously, but will not
simultaneously in the same sub-band, the formula of calculated the MPE is:
CPD1 / LPD1 + CPD2 / LPD2 + ……etc. < 1
CPD = Calculation power density
LPD = Limit of power density


AP43 (Internal antenna): Eth6 Radio WLAN + Eth7 Radio WLAN + Eth8 Radio WLAN + BT LE = 0.319 / 1 +
0.142 / 1 + 0.516 / 1 + 0.001 / 1 = 0.978

AP43E (External antenna): Eth6 Radio WLAN + Eth7 Radio WLAN + Eth8 Radio WLAN + BT LE = 0.363 / 1 +
0.162 / 1 + 0.204 / 1 + 0.001 / 1 = 0.730


Therefore the maximum calculations of above situations are less than the “1” limit.



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Report No.: SA190211C09                            Page No. 7 / 7                                 Report Format Version: 6.1.1



Document Created: 2019-06-24 16:56:55
Document Modified: 2019-06-24 16:56:55

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