RF Exposure

FCC ID: PD5-LM-WESA0440A

RF Exposure Info

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FCCID_3925492

                                                           RF Exposure Report

                       Report No.: SA180109C12A

                             FCC ID: PD5-LM-WESA0440A

                              Model: LM-WESA0440A

                 Received Date: Jan. 09, 2018

                         Test Date: Feb. 01 ~ Mar. 19, 2018

                     Issued Date: May 17, 2018


                         Applicant: Delta Networks, Inc.

                          Address: No. 252, Shang Ying Rd., Kuei San District, Taoyuan City 33341, Taiwan



                        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.)




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 TAF or any government agencies.


Report No.: SA180109C12A                                             Page No. 1 / 6                                             Report Format Version: 6.1.1
Reference No.: 180109C13


                                                                   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




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Reference No.: 180109C13


                                         Release Control Record


Issue No.             Description                                        Date Issued
SA180109C12A          Original release                                   May 17, 2018




Report No.: SA180109C12A                    Page No. 3 / 6        Report Format Version: 6.1.1
Reference No.: 180109C13


1    Certificate of Conformity


            Product: 802.11 b/g/n/ac WIFI AP

              Model: LM-WESA0440A

    Sample Status: Engineering sample

          Applicant: Delta Networks, Inc.

          Test Date: Feb. 01 ~ Mar. 19, 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 RF characteristics under the conditions specified in this report.




      Prepared by :                                               , Date:        May 17, 2018
                              Pettie Chen / Senior Specialist




     Approved by :                                                , Date:        May 17, 2018
                              Bruce Chen / Project Engineer




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Reference No.: 180109C13


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
                                                                                  2
        1.34-30                 824/f                2.19/f               (180/f )*                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


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.




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3    Calculation Result of Maximum Conducted Power

Frequency Band         Max Power         Antenna Gain              Distance     Power Density             Limit
    (MHz)                (dBm)               (dBi)                   (cm)         (mW/cm2)              (mW/cm2)
                                                     CDD Mode

    2412-2462              29.52              9.45                   37              0.459                   1

    5180-5240              29.79              9.02                   37              0.442                   1

    5250-5350              23.91              9.15                   37              0.118                   1

    5470-5725              23.73              9.50                   37              0.122                   1

    5745-5825              29.53              9.74                   37              0.491                   1

                                                Beamforming Mode

    2412-2462              23.99              9.45                   37              0.128                   1

    5180-5240              25.11              9.02                   37              0.150                   1

    5250-5350              19.41              9.15                   37              0.042                   1

    5470-5725              19.23              9.50                   37              0.043                   1

    5745-5825              25.01              9.74                   37              0.174                   1

Note:
For 2412-2462MHz: Directional gain = 10 log[(10G1 /20 + 10G2 /20 + ... + 10GN /20)2/4]= 9.45dBi
For 5180-5240MHz: Directional gain = 10 log[(10G1 /20 + 10G2 /20 + ... + 10GN /20)2/4]= 9.02dBi
For 5250-5350MHz: Directional gain = 10 log[(10G1 /20 + 10G2 /20 + ... + 10GN /20)2/4]= 9.15dBi
For 5470-5725MHz: Directional gain = 10 log[(10G1 /20 + 10G2 /20 + ... + 10GN /20)2/4]= 9.50dBi
For 5745-5825MHz: Directional gain = 10 log[(10G1 /20 + 10G2 /20 + ... + 10GN /20)2/4]= 9.74dBi

Conclusion:
2.4GHz & 5GHz can transmit at same time.
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 + WLAN 5GHz = 0.459 + 0.491 = 0.950


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


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Report No.: SA180109C12A                          Page No. 6 / 6                             Report Format Version: 6.1.1
Reference No.: 180109C13



Document Created: 2019-04-01 19:27:52
Document Modified: 2019-04-01 19:27:52

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