RF Test Report -WIFI

FCC ID: 2AEUPBHADV001

Test Report

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(    ntl                                                                                 Report Number: 1905FR27
    \-’                                                                                                      Rev.01




                                            RF Test Report



    Applicant                 :   Ring LLC

    Product Type              :   Door View Cam

    Trade Name                :   Ring

    Model Number              :   G63RIA

    Applicable Standard       :   FCC 47 CFR PART 15 SUBPART C
                                  ANSI C63.10:2013

    Receive Date              :   Apr. 08, 2019


    Test Period               :   Mar. 13 ~ Mar. 15, 2019


    Issue Date                :   Jun. 13, 2019



                                                     Issue by

    A Test Lab Techno Corp.
    No. 140—1, Changan Street, Bade District,                                         neuck (IA\F)
    Taoyuan City 33465, Taiwan (R.O.C.)                                                x t §          mmans

    Tel : +886—3—2710188 / Fax : +886—3—2710190


    Taiwan Accreditation Foundation accreditation number: 1330
    Test Firm MRA designation number: TWOO10


     Note: This report shall not be reproduced except in full, without the written approval of A Test Lab Techno
     Corp. This document may be altered or revised by A Test Lab Techno Corp. personnel only, and shall be
     noted in the revision—section of the document. The client should not use it to claim product endorsement by
     TAF, or any government agencies. The test results in the report only apply to the tested sample.




                                                     1 of 20


                                                              Report Number: 1905FR27
                                                                                Rev.01




                                  Revision History
Rev.    Issue Date                        Revisions                Revised By
00     May 22, 2019    Initial Issue                                 Nina Lin
01     Jun. 13, 2019   Page 17 & 18 Added Test Photographs.          Nina Lin




                                       2 of 20


(     ntl                                                                                   Report Number: 1905FR27
    \-’                                                                                                          Rev.01




                         Verification of Compliance
                                                                                      Issued Date: Jun. 13, 2019

     Applicant                    :        Ring LLC


     Product Type                 :        Door View Cam

     Trade Name                   :        Ring

     Model Number                 I—       GB3ROA


     FCC ID                       :        2AEUPBHADVOO1

     EUT Rated Voltage            :        DC 3.6 V or DC 3.65 V, 6040 mAh

     Test Voltage                 :        DC 3.65 V

     Applicable Standard          _:       FCC 47 CFR PART 15 SUBPART C
                                           ANSI C63.10:2013

     Test Result                  :        Complied


     Performing Lab.              :        A Test Lab Techno Corp.                          «19
                                                                                  .   .    SAAA
                                           No. 140—1, Changan Street, Bade District, m
                                           Tacyuan City 33465, Taiwan (R.O.C.)             ',//Zib\
                                                                                              Ahitebi®
                                           Tel : +886—3—2710188 / Fax : +886—3—2710190
                                           Taiwan Accreditation Foundation accreditation number: 1330
                                           hitp://www.atl—lab.com.tw/e—index.htm


    A Test Lab Techno Corp. tested the above equipment in accordance with the requirements set forth in the above
    standards. All indications of Pass/Fail in this report are opinions expressed by A Test Lab Techno Corp. based on
    interpretations and/or observations of test results. The test results show that the equipment tested is capable of
    demonstrating compliance with the requirements as documented in this report.



     Approved By                ifi'\/                   ‘   [    Reviewed By              EJ/((C         Ou i/q_ngz
                                       M   +            C

     (Manager)                                 <_(Fly Lu)        (Testing Engineer)            (Eric Ou Yang)




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                                                                                                       Report Number: 1905FR27
                                                                                                                         Rev.01




                                                  TABLE OF CONTENTS
1 General Information ......................................................................................................... 5
  1.1. Summary of Test Result ............................................................................................. 5
  1.2. Measurement Uncertainty .......................................................................................... 6
2 EUT Description................................................................................................................ 7
3 Test Methodology ............................................................................................................. 8
  3.1. Mode of Operation ...................................................................................................... 8
  3.2. EUT Test Step............................................................................................................. 8
  3.3. Configuration of Test System Details .......................................................................... 9
  3.4. Test Instruments ....................................................................................................... 10
  3.5. Test Site Environment............................................................................................... 10
4 Measurement Procedure ................................................................................................ 11
  4.1. Radiated Emission Measurement ............................................................................. 11
  4.2. Maximum Conducted Output Power Measurement .................................................. 15
  4.3. Antenna Measurement ............................................................................................. 15
5 Test Results .................................................................................................................... 16
  Annex A. Conducted Test Results .................................................................................... 16
  Annex B. Radiated Emission Measurement ..................................................................... 17




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                                                                                                     Report Number: 1905FR27
                                                                                                                       Rev.01



1   General Information
1.1. Summary of Test Result

                       Standard
                                                                     Item                     Result         Remark
                         FCC

                       15.207                      AC Power Conducted Emission                   N/A          Note1

                     15.247(d)                     Transmitter Radiated Emissions             PASS            Note2

                    15.247(b)(3)                   Max. Output Power                          PASS             -----

                    15.247(a)(2)                   6 dB RF Bandwidth                             N/A          Note1

                     15.247(e)                     Maximum Power Spectral Density                N/A          Note1

                                                   Out of Band Conducted Spurious
                     15.247(d)                                                                   N/A          Note1
                                                   Emission

                       15.203                      Antenna Requirement                        PASS             -----

    The test results of this report relate only to the tested sample(s) identified in this report.
    Note1: C2PC No need for verification.
    Note2: Transmitter Radiated Emissions is tested using the Harmonic worst Mode 2(2462 MHz).


                       Standard                                                    Description


            CFR47, Part 15, Subpart C              Intentional Radiators



                                                   American National Standard of Procedures for Compliance Testing of
                ANSI C63. 10: 2013
                                                   Unlicensed Wireless Devices

                                                   GUIDANCE FOR COMPLIANCE MEASUREMENTS ON DIGITAL
             KDB 558074 D01 15.247                 TRANSMISSION SYSTEM, FREQUENCY HOPPING SPREAD
             Meas Guidance v05r02                  SPECTRUM SYSTEM, AND HYBRID SYSTEM DEVICES
                                                   OPERATING UNDER SECTION 15.247 OF THE FCC RULES




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1.2. Measurement Uncertainty

               Test Item          Frequency Range                          Uncertainty (dB)

                                  9 kHz ~ 150 kHz                                2.7
     Conducted Emission
                                 150 kHz ~ 30 MHz                                2.7

                                  9 kHz ~ 30 MHz                                 1.7

                                 30 MHz ~ 1000 MHz                               5.7

     Radiated Emission         1000 MHz ~ 18000 MHz                              5.5

                               18000 MHz ~ 26500 MHz                             4.8

                               26500 MHz ~ 40000 MHz                             4.8

     Conducted Output Power                          +0.27 dB / -0.28 dB

     RF Bandwidth                                          4.96 %

     Power Spectral Density                          +0.71 dB / -0.77 dB




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2   EUT Description

    Appleant                      Ring LC
                                  1523 26th Street, Sente Monics CA 80404, United States
    Menufecturer                  :esnga ‘;;m Street, Sante Monics CA 80404, United States
    Product Type                  Door View Cam
    Trade Name                    Ring
    Made! Number                  cesroa
    reeio                         zAeupeHianvoot
    Class II Permissive Change    Change the main bosrd, camera board and the appesrance
    Operate Frea. Band            Freq“m:fi”ge                    Modulation     BCE:ZCLT;‘”     ADDD/EBt;DR(E;t\E(ns]
    ieee 802. 110                    2412 — 2002                  psss           20 MHz           Up to 11 Mbps
    eee s02. 19                      2412— 202                    orom           20 MHz          Up to 54 Mbps
    ieEE 802.tin 24 GHez 20 MHz      2412— 2402                   orom           20 MHz         |_Up to 722 Mps
                                                           Type                               Max. GeintaBi)
    Antenna informstion
                                                       PIFA Anterns                                  2.78
    Antenns Delvery               See section 3.1
    Operate Temp. Range           40— «50 ‘c

           Frequency Band              Max. RF ?\;Jvt]putpuwer

    ieee 202 tmb                                avet
    ieee 202 110                                over
    iEEE 802. t1n 24 GHe 20 Mz                  oo




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                                                                                                                   Rev.01



3   Test Methodology
3.1. Mode of Operation

    Decision of Test ATL has verified the construction and function in typical operation. All the test modes were carried out
    with the EUT in normal operation, which was shown in this test report and defined as:

     Test Mode
     Mode 1: Transmit mode
     Mode 2: IEEE 802.11b Continuous TX mode
     Mode 3: IEEE 802.11g Continuous TX mode
     Mode 4: IEEE 802.11n 2.4 GHz 20 MHz Continuous TX mode
    Software used to control the EUT for staying in continuous transmitting mode was programmed.

    After verification, all tests were carried out with the worst case test modes.



    By preliminary testing and verifying three axis (X, Y and Z) position of EUT transmitted status, it was found that “X

    axis” position was the worst, then the final test was executed the worst condition and test data were recorded in this

    report.




                                                                                     Data Rate
              Test Mode                      Antenna Delivery                                                Test Channel
                                                                                      (Mbps)
               Mode 2                              1TX                                   1                 1, 6, 11
               Mode 3                              1TX                                   6                 1, 6, 11
               Mode 4                              1TX                                  6.5                1, 6, 11




3.2. EUT Test Step

     1.    Setup the EUT shown on “Configuration of Test System Details”.

     2.    Turn on the power of all equipment.

     3.    Turn Wi-Fi function link to AP.

     4.    EUT run test program.



     Measurement Software
     No.      Description                                          Software                      Version
      1       Radiated Emission                                    EZ EMC                        1.1.4.4




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                                                                           Report Number: 1905FR27
                                                                                             Rev.01




3.3. Configuration of Test System Details

    Radiated Emission




                                                  EUT




                                         Devices Description

           Product      Manufacturer   Model Number        Serial Number         Power Cord

     (1)       ---          ---             ---                 ---                  ---




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                                                                                                       Rev.01




3.4. Test Instruments

    For Radiated Emissions
    Test Period: May 13, 2019
         Equipment               Manufacturer      Model Number     Serial Number   Cal. Date      Cal. Period
      Spectrum Analyzer
                                   Keysight           N9010A        MY52221312      01/14/2019       1 year
       (10 Hz~44 GHz)
         Pre Amplifier
                                   Agilent             8449B        3008A02237      10/16/2018       1 year
        (1~26.5 GHz)
        Pre Amplifier
                                   Agilent             8447D         2944A11119     01/14/2019       1 year
     (100 kHz~1.3 GHz)
     Broadband Antenna           Schwarzbeck         VULB9168              416      10/19/2018       1 year
        Horn Antenna          SCHWARZBECK
                                                    BBHA9120D        9120D-550      08/23/2018       1 year
         (1~18 GHz)          MESS-ELEKTRONIK
        Horn Antenna          SCHWARZBECK
                                                     BBHA9170            9170-320   08/07/2018       1 year
        (18~40 GHz)          MESS-ELEKTRONIK
                                 COM-POWER
        Loop Antenna                                  AL-130             121014     03/29/2019       1 year
                                CORPORATION
          RF Cable                  EMCI         EMC104-N-N-6000         TE01-1     02/20/2019       1 year
                                                 EMC104-SM-SM-1
      Microwave Cable               EMCI                                 170814     10/30/2018       1 year
                                                      3000
                                                 EMC102-KM-KM-1
      Microwave Cable               EMCI                                 151001     02/20/2019       1 year
                                                      4000


    For Conducted
    Test Period: May 15, 2019

          Equipment              Manufacturer    Model Number       Serial Number    Cal. Date     Cal. Period

         Power Sensor              Anritsu         MA2411B               1126022     08/29/2018      1 year

         Power Meter               Anritsu         ML2495A               1135009     08/29/2018      1 year
                                                EMC102-SM-SM15
       Microwave Cable              EMCI                                   001       11/21/2018      1 year
                                                      00
           Test Site                 ATL             TE05                 TE05         N.C.R.         -----


    Note: N.C.R. = No Calibration Request.




3.5. Test Site Environment

                     Items                      Required (IEC 60068-1)                    Actual

     Temperature (C)                                   15-35                               26

     Humidity (%RH)                                     25-75                               60

     Barometric pressure (mbar)                        860-1060                             990




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                                                                                                                Rev.01



4   Measurement Procedure
4.1. Radiated Emission Measurement

         Limit
    According to §15.209(a), except as provided elsewhere in this subpart, the emissions from an intentional radiator shall
    not exceed the field strength levels specified in the following table:
                   Frequency                              Field Strength                   Measurement Distance
                     (MHz)                               (μV/m at meter)                           (meters)
                  0.009 – 0.490                           2400 / F (kHz)                             300

                  0.490 – 1.705                           24000 / F (kHz)                             30

                  1.705 – 30.0                                  30                                    30

                     30 - 88                                   100**                                   3

                     88-216                                    150**                                   3

                    216-960                                    200**                                   3

                   Above 960                                    500                                    3


    ** Except as provided in paragraph (g), fundamental emissions from intentional radiators operating under this Section
    shall not be located in the frequency bands 54-72 MHz, 76-88 MHz, 174-216 MHz or 470-806 MHz. However,
    operation within these frequency bands is permitted under other sections of this Part, e.g., Sections 15.231 and
    15.241.


         Setup
    9 kHz ~ 30 MHz




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Below 1 GHz




Above 1 GHz




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     Test Procedure
Final radiation measurements were made on a three-meter, Semi Anechoic Chamber. The EUT system was placed
on a nonconductive turntable which is 0.8 or 1.5 meters height, top surface 1.0 x 1.5 meter. The spectrum was
examined from 250 MHz to 2.5 GHz in order to cover the whole spectrum below 10th harmonic which could generate
from the EUT. During the test, EUT was set to transmit continuously & Measurements spectrum range from 9 kHz to
26.5 GHz is investigated.
For measurements below 1 GHz the resolution bandwidth is set to 100 kHz for peak detection measurements or 120
kHz for quasi-peak detection measurements. Peak detection is used unless otherwise noted as quasi-peak.
For measurements above 1 GHz the resolution bandwidth is set to 1 MHz, and then the video bandwidth is set to 3
MHz for peak measurements and 10 Hz for average measurements when Duty cycle >0.98 / 1/T for average
measurements when Duty cycle <0.98. A nonconductive material surrounded the EUT to supporting the EUT for
standing on tree orthogonal planes. At each condition, the EUT was rotated 360 degrees, and the antenna was raised
and lowered from one to four meters to find the maximum emission levels. Measurements were taken using both
horizontal and vertical antenna polarization.
SCHWARZBECK MESS-ELEKTRONIK Biconilog Antenna at 3 Meter and the SCHWARZBECK Double Ridged
Guide Antenna was used in frequencies 1 –26.5 GHz at a distance of 3 meter. The antenna at an angle toward the
source of the emission. All test results were extrapolated to equivalent signal at 3 meters utilizing an inverse linear
distance extrapolation Factor (20 dB/decade).
For testing above 1 GHz, the emission level of the EUT in peak mode was 20 dB lower than average limit (that means
the emission level in peak mode also complies with the limit in average mode), then testing will be stopped and peak
values of EUT will be reported, otherwise, the emissions will be measured in average mode again and reported.
Appropriate preamplifiers were used for improving sensitivity and precautions were taken to avoid overloading or
desensitizing the spectrum analyzer. No post – detector video filters were used in the test.
The spectrum analyzer’s 6 dB bandwidth was set to 1 MHz, and the analyzer was operated in the peak detection
mode, for frequencies both below and up 1 GHz. The average levels were obtained by subtracting the duty cycle
correction factor from the peak readings.
The following procedures were used to convert the emission levels measured in decibels referenced to 1 microvolt
(dBuV) into field intensity in micro volts pre meter (uV/m).
The actual field intensity in decibels referenced to 1 microvolt in to field intensity in micro colts per meter (dBuV/m).




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                                                                                                            Rev.01




The actual field is intensity in referenced to 1 microvolt per meter (dBuV/m) is determined by algebraically adding the
measured reading in dBuV, the antenna factor (dB), and cable loss (dB) and Subtracting the gain of preamplifier (dB)
is auto calculate in spectrum analyzer.


  (1) Amplitude (dBuV/m) = FI (dBuV) +AF (dBuV) +CL (dBuV)-Gain (dB)
      FI= Reading of the field intensity.
      AF= Antenna factor.
      CL= Cable loss.
      P.S Amplitude is auto calculate in spectrum analyzer.
  (2) Actual Amplitude (dBuV/m) = Amplitude (dBuV)-Dis(dB)
      The FCC specified emission limits were calculated according the EUT operating frequency and by following
      linear interpolation equations:
      (a) For fundamental frequency : Transmitter Output < +30 dBm
      (b) For spurious frequency : Spurious emission limits = fundamental emission limit /10


Data of measurement within this frequency range without mark in the table above means the reading of emissions are
attenuated more than 20 dB below the permissible limits or the field strength is too small to be measured.




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                                                                                                               Rev.01




4.2. Maximum Conducted Output Power Measurement

          Limit
    For systems using digital modulation in the 2400-2483.5 MHz, the limit for maximum output power is 30 dBm.


    And According to 15.247 (b), if transmitting antennas of directional gain greater than 6 dBi are used, the power shall
    be reduced by the amount in dB that the directional gain of the antenna exceeds 6 dBi.




          Test Setup




                        EUT                   Power                         Power
                                              Sensor                        Meter




          Test Procedure
        The testing follows the Measurement Procedure of ANSI C63.10:2013 section 11.9.2.3.2 Method AVGPM.
        The tests below are run with the EUT’s transmitter set at high power in TX mode. The EUT is needed to force
        selection of output power level and channel number. While testing, EUT was set to transmit continuously. Remove
        the Subjective device’s antenna and connect the RF output port to power sensor.




4.3. Antenna Measurement

          Limit
    For intentional device, according to 15.203, an intentional radiator shall be designed to ensure that no antenna other
    than that furnished by the responsible party shall be used with the device.
    And According to 15.247 (b), if transmitting antennas of directional gain greater than 6 dBi are used, the power shall
    be reduced by the amount in dB that the directional gain of the antenna exceeds 6 dBi.


          Antenna Description
    See section 2 – antenna information.




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                                                                                                             Rev.01



5   Test Results
Annex A. Conducted Test Results
    Maximum Conducted Output Power Measurement
                                                       Average Output Power               Peak Output Power
                           Frequency
         Test Mode                       Data Rate      Measurement Results      Measurement Results          Limit
                             (MHz)
                                                         (dBm)          (W)       (dBm)          (W)          (W)
                              2412                       14.89         0.031      16.92         0.049         ≤ 30
          Mode 2              2437          1M           15.30         0.034      17.53         0.057         ≤ 30
                              2462                       15.55         0.036      17.83         0.061         ≤ 30
                              2412                       10.00         0.010      18.50         0.071         ≤ 30
          Mode 3              2437          6M           14.84         0.030      19.85         0.097         ≤ 30
                              2462                       10.16         0.010      18.45         0.070         ≤ 30
                             2412                        10.02         0.010      18.63         0.073         ≤ 30
          Mode 4             2437          6.5 M         14.00         0.025      19.74         0.094         ≤ 30
                             2462                        10.05         0.010      18.45         0.070         ≤ 30

    Note: The relevant measured result has the offset with cable loss already.




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    Annex B. Radiated Emission Measurement

        Harmonic
        Below 1 GHz
         Standard                  FCG Part 15. 27                                   Test Distance                          3m

         Test tem                  Harmonic                                          Power                                  DC 3.85 V

         Frequency                 2462 MHz                                          Temp (C)/Hum (%RH)                     26(C)160 %RH

         Mode                      Mode 2

         Ant.Polar                 Horizontal



               500— sbwrm




               w          r———




              0
                  30000    127.0      2240       321.00    410.00       515.00        612.00    70000     806.00             1000.00°Wfte




         No.          Frequency.       Reading        Correct Factor             Result          Limi              Margin         Rematk
                          hiz           (aBuv)            (dBim             (dBuvim)           (dBuvim)             ta9)
          1           172.se00           sess             «27                    s306           «3.s0              104              or
          2           228.0100           «3s              33                     3702           «5.00              «288             or
          s           270.2000           «184             «.09                   3715           «5.00              «a85             or
          «           se«.0500           seas             «256                   s5.602         «5.00              —10.38           or
          s           «53.8000           se45             «o1                    3754           «5.00              «248             or
           s         7es 000          s178              «85                sees           «5.00            237                      or
         Note:1. Result(dBuVim) = Correct Factor (dB/m) + Reading(dBu\)
                   Example: 33.08 =—6.27 + 30.39
                2Correction factor (dB/m) = Antenna Factor (dBfm) + Cable loss (d8) — Pre—Amplifier gain (dB)
                3. When the peak resultsare less than average Iimit, so not need to evaluate the average



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     Standard                      FCG Par 15.247                                  Test Distance                            3m
     Test tem                      Harmonic                                        Power                                    nc sesy
     Frequency                     meonie                                          Temp (C)Hum (%RHQ                        28(C)ieo sR
     Mode:                         Mode 2
     Ant.Polar                     Vertical

             800      u/m
                                                                                                                    Lini1        —
                                                                                                                    Morgin:      —




             40
                  30000   1270        2200        3210    £10.00       $15.00       61200     70800    806 00                 100000 Mtte




     No.              Frequency.        Reading      Correct Factor          Result           Limi              Margin            Rematk
                       hiz               (aBuv)          (dBim             (dBuvim)         (dBuvim)             ta9)
         1            234.6700           «121            «80                    135           «5.00             «mss                 or
         2            281.2300           s7.e3           «.63                   33.00         «5.00             —13.00               or
         s            «015100            sas2            222                    37.80         «5.00             «270                 or
      «               «53.8000           «208            «o1                    «115          «5.00             «.85                 or
         s            730.3400           2787            «38                    s225          «5.00             1375                 or
       s         s03.0700         207               7.70               ss67           «5.00          1233                            or
     Note:1. Result(dBuVim) = Correct Factor (dB/m) + Reading(dBu\)
               Example: 34.3 =—6.08 +41.21
           2Correction factor (dB/m) = Antenna Factor (dBfm) + Cable loss (d8) — Pre—Amplifier gain (dB)
            3. When the peak resultsare less than average Iimit, so not need to evaluate the average




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     Above 1 GHz
      Standard                    FCC Par 15.247                                       Test Distance                          3m
      Test tem                    Harmonic                                             Power                                  nc sesv
      Frequency:                  sez uie                                              Termp(C)/Hum (%RH)                     26(C)ie0 wR
      Mode:                       Mode 2
      Ant.Polar                   Horizontal


             $00 @u/m




                                   P             3
              «n




             ao
                  1oon.oon scon        cro.on        ocso.on     rizoninn   taren on    teson on    toden on   Praoni00       Zeson o0 ie


      No             Frequency          Reading           Correct Factor           Resut            Limt             Margin        Rematk
                       (viiz)           (dBuv)                 (dBim)           (dBuvim)           (dBuvim            (a8)
         1            4922,000           a221                   577                a7se             74.00            «26.02         peak
         2            4922,000           30.20                  577                as o7            5.00              «903          awe
         s            73ee.000           sa.15                 1238                asas             74.00            «2782          peak
       a              73ee.000           2288                  1238                s621             5.00             18.79          awe
      Note:1. Result(dBuVim) = Correct Factor (dB/m) + Reading(dBu\)
                Example: 47.08 = 5.77 +42.21
             2Correction factor (dB/m) = Antenna Factor (dBfm) + Cable loss (d8) — Pre—Amplifier gain (dB)
             3. When the peak resultsare less than average Iimit, so not need to evaluate the average




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    \’                                                                                                                                       Rev.01




     Standard                        FCG Par 15.247                                      Test Distance                        3m
     Test tem                        Harmonic                                            Power                                nc sesy
     Frequency                       meonie                                              Temp (C)Hum (%RHQ                    28(C)ieo sR
     Mode:                           Mode 2
     Ant.Polar                       Vertical

             800      u/m




                                      t             3

              a




             40
                  1000 000. 360 00        s100 00       stso 00   1200 00—    12750.00    1€300.00    1g5000    2140000       26500 00 itc




     No.               Frequency.          Reading           Correct Factor         Result             Limi          Margin        Rematk
                        hiz                 (aBuv)               (dBim            (dBuvim)           (dBuvim)         ta9)
         1            «922.000              «s1                   5.77              s2ee              7400           BE             peak
         2            «922.000              «359                  5.77              «038              s4.00           .66           awe
         s             73ee.000             .50                   1233              «508              7400           2707           peak
       «         73ee.000         2277              1233               36.10           s4.00          —18.80                        awe
     Note:1. Result(dBuVim) = Correct Factor (dB/m) + Reading(dBu\)
               Example: §2.68 = 5.77 + 46.91
            2Correction factor (dB/m) = Antenna Factor (dBfm) + Cable loss (d8) — Pre—Amplifier gain (dB)
            3. When the peak resultsare less than average Iimit, so not need to evaluate the average




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Document Created: 2019-06-28 17:22:55
Document Modified: 2019-06-28 17:22:55

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