R102507-FCC DFS Report

FCC ID: A4RH0ME

Test Report

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FCCID_3153642

                                                 TEST REPORT

                                   Covering the
                        DYNAMIC FREQUENCY SELECTION (DFS)
                                  REQUIREMENTS
                                       OF

                            FCC Part 15 Subpart E (UNII), RSS-247

                                                   Google Inc.
                                                  Model(s): H0ME

                   IC CERTIFICATION #:                        10395A-H0ME
                               FCC ID:                        A4RH0ME

                                     COMPANY:                 Google Inc.
                                                              1600 Amphitheatre Pky
                                                              Mountain View, CA, 94043

                                      TEST SITE:              National Technical Systems - Silicon Valley
                                                              41039 Boyce Road
                                                              Fremont, CA 94538

                               REPORT DATE:                   September 13, 2016

                        FINAL TEST DATE:                      July 29, 2016

                            TEST ENGINEER:                    Mehran Birgani

                TOTAL NUMBER OF PAGES:                        29




                    National Technical Systems - Silicon Valley is accredited by the A2LA, certificate number 0214.26, to perform
                    the test(s) listed in this report, except where noted otherwise. This report and the information contained herein
                    represent the results of testing test articles identified and selected by the client performed to specifications and/or
                    procedures selected by the client. National Technical Systems (NTS) makes no representations, expressed or
                    implied, that such testing is adequate (or inadequate) to demonstrate efficiency, performance, reliability, or any
                    other characteristic of the articles being tested, or similar products. This report should not be relied upon as an
                    endorsement or certification by NTS of the equipment tested, nor does it represent any statement whatsoever as
                    to its merchantability or fitness of the test article, or similar products, for a particular purpose. This report shall
                    not be reproduced except in full




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NTS Silicon Valley -- EMC Department                                                Test Report
                                                                Report Date: September 13, 2016

                                       VALIDATING SIGNATORIES

PROGRAM MGR /
TECHNICAL REVIEWER:


______________________________
Mark Hill
Staff Engineer



REPORT PREPARER:


______________________________
Mehran Birgani
Senior EMC Engineer



QUALITY ASSURANCE DELEGATE


______________________________
David Guidotti
Senior Technical Writer




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NTS Silicon Valley -- EMC Department                                                    Test Report
                                                                    Report Date: September 13, 2016

                                            REVISION HISTORY
   Rev #               Date                              Comments                  Modified By
     -          September 13, 2016     Initial Release                                  -




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NTS Silicon Valley -- EMC Department                                                                                                             Test Report
                                                                                                                             Report Date: September 13, 2016

                                                                    TABLE OF CONTENTS
TITLE PAGE ...............................................................................................................................................................1
VALIDATING SIGNATORIES ................................................................................................................................2
REVISION HISTORY ................................................................................................................................................3
TABLE OF CONTENTS ............................................................................................................................................4
LIST OF TABLES .......................................................................................................................................................5
LIST OF FIGURES .....................................................................................................................................................5
SCOPE ..........................................................................................................................................................................6
OBJECTIVE ................................................................................................................................................................6
STATEMENT OF COMPLIANCE ...........................................................................................................................6
DEVIATIONS FROM THE STANDARD ................................................................................................................6
TEST RESULTS ..........................................................................................................................................................7
  TEST RESULTS SUMMARY – FCC PART 15, CLIENT DEVICE .......................................................................7
  MEASUREMENT UNCERTAINTIES....................................................................................................................7
EQUIPMENT UNDER TEST (EUT) DETAILS ......................................................................................................8
  GENERAL................................................................................................................................................................8
  ENCLOSURE ...........................................................................................................................................................8
  MODIFICATIONS ...................................................................................................................................................8
  SUPPORT EQUIPMENT .........................................................................................................................................9
  EUT INTERFACE PORTS ......................................................................................................................................9
  EUT OPERATION ...................................................................................................................................................9
RADAR WAVEFORMS ...........................................................................................................................................10
DFS TEST METHODS .............................................................................................................................................12
  RADIATED TEST METHOD ...............................................................................................................................12
  DFS MEASUREMENT INSTRUMENTATION ...................................................................................................14
  RADAR GENERATION SYSTEM .......................................................................................................................14
  CHANNEL MONITORING SYSTEM ..................................................................................................................15
  RADAR GENERATOR PLOTS ............................................................................................................................16
DFS MEASUREMENT METHODS .......................................................................................................................22
  DFS – CHANNEL CLOSING TRANSMISSION TIME AND CHANNEL MOVE TIME ..................................22
  DFS – CHANNEL NON-OCCUPANCY AND VERIFICATION OF PASSIVE SCANNING ............................22
APPENDIX A TEST EQUIPMENT CALIBRATION DATA ..............................................................................23
APPENDIX B TEST DATA TABLES FOR RADAR DETECTION PROBABILITY ......................................24
APPENDIX C TEST DATA TABLES AND PLOTS FOR CHANNEL CLOSING ...........................................25
  FCC PART 15 SUBPART E CHANNEL CLOSING MEASUREMENTS .................................................................25
APPENDIX D TEST CONFIGURATION PHOTOGRAPH(S) ...........................................................................28
END OF REPORT ....................................................................................................................................................29




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NTS Silicon Valley -- EMC Department                                                                                     Test Report
                                                                                                     Report Date: September 13, 2016

                                                          LIST OF TABLES
Table 1 - FCC Part 15 Subpart E Client Device Test Result Summary ........................................................ 7
Table 2 - FCC Short Pulse Radar Test Waveforms .................................................................................... 10
Table 3 - FCC Long Pulse Radar Test Waveforms..................................................................................... 11
Table 4 - FCC Frequency Hopping Radar Test Waveforms ....................................................................... 11
Table 5 - FCC Part 15 Subpart E Channel Closing Test Results ................................................................ 25

                                                          LIST OF FIGURES
Figure 1 Test Configuration for radiated Measurement Method ................................................................ 12
Figure 2 SA Noise Floor During Testing (radar shown at 520 ms) ............................................................ 15
Figure 3 FCC Type 1 Radar (18 pulses) ..................................................................................................... 16
Figure 4 FCC Type 2 Radar (24 pulses) ..................................................................................................... 17
Figure 5 FCC Type 3 Radar (17 pulses) ..................................................................................................... 18
Figure 6 FCC Type 4 Radar (16 pulses) ..................................................................................................... 19
Figure 7 FCC Type 5 Radar (burst with three pulses, 1650 µs first period) ............................................... 20
Figure 8 FCC Type 6 Radar (9 pulses in each burst) .................................................................................. 21
Figure 9 Channel Utilization During In-Service Detection Measurements (80MHz ac mode) .................. 24
Figure 10 Channel Closing Time and Channel Move Time (80MHz ac mode) – 40 second plot .............. 25
Figure 11 Close-Up of Transmissions Occurring More Than 200ms After The End of Radar .................. 26
Figure 12 Radar Channel Non-Occupancy Plot (mode) ............................................................................. 27




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NTS Silicon Valley -- EMC Department                                                   Test Report
                                                                   Report Date: September 13, 2016

SCOPE
        Test data has been taken pursuant to the relevant DFS requirements of the following
        standard(s):

            •   FCC Part 15 Subpart E Unlicensed National Information Infrastructure (U-NII)
                Devices.
            •   RSS-247 Local Area Network Devices.
        Tests were performed in accordance with these standards together with the current
        published versions of the basic standards referenced therein including FCC KDB 905462
        D02 and FCC KDB 905462 D03 as outlined in NTS Silicon Valley test procedures. The
        test results recorded herein are based on a single type test of the Google Inc. model
        H0ME and therefore apply only to the tested sample. The sample was selected and
        prepared by Dominik Mente of Google Inc..


OBJECTIVE
        The objective of the manufacturer is to comply with the standards identified in the
        previous section. In order to demonstrate compliance, the manufacturer or a contracted
        laboratory makes measurements and takes the necessary steps to ensure that the
        equipment complies with the appropriate technical standards. Compliance with some
        DFS features is covered through a manufacturer statement or through observation of the
        device.

STATEMENT OF COMPLIANCE
        The tested sample of the Google Inc. model H0ME complied with the DFS requirements
        of FCC Part 15.407(h)(2), and RSS-247 Issue 1.
        Maintenance of compliance is the responsibility of the manufacturer. Any modifications
        to the product should be assessed to determine their potential impact on the compliance
        status of the device with respect to the standards detailed in this test report.

DEVIATIONS FROM THE STANDARD
        No deviations were made from the test methods and requirements covered by the scope
        of this report.




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NTS Silicon Valley -- EMC Department                                                                Test Report
                                                                                Report Date: September 13, 2016

TEST RESULTS
TEST RESULTS SUMMARY – FCC Part 15, CLIENT DEVICE

                    Table 1 - FCC Part 15 Subpart E Client Device Test Result Summary
                        Radar          EUT           Measured
    Description                                                      Requirement          Test Data       Status
                        Type        Frequency         Value
Channel closing
                        Type 0      5530MHz           0.40 ms             60 ms           Appendix C     Complies
transmission time
Channel move time       Type 0      5530MHz            220 ms              10 s           Appendix C     Complies
Non-occupancy
                        Type 0      5530MHz         > 30 minutes      > 30 minutes        Appendix C     Complies
period - associated
Passive Scanning         N/A           N/A                        Refer to manufacturer attestation
 1) Tests were performed using the radiated test method.
 2) Channel availability check and detection threshold are not applicable to client devices.



MEASUREMENT UNCERTAINTIES
        ISO/IEC 17025 requires that an estimate of the measurement uncertainties associated
        with the emissions test results be included in the report. The measurement uncertainties
        given below are based on a 95% confidence level, with a coverage factor (k=2) and were
        calculated in accordance with UKAS document LAB 34.


                  Measurement                    Measurement Unit         Expanded Uncertainty
        Timing
                                                                            Timing resolution
        (Channel move time, aggregate                     ms
                                                                                ± 0.24%
        transmission time)
        Timing
                                                       seconds                   5 seconds
        (non occupancy period)
        DFS Threshold (radiated)                        dBm                         1.6
        DFS Threshold (conducted)                       dBm                         1.2




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NTS Silicon Valley -- EMC Department                                                    Test Report
                                                                    Report Date: September 13, 2016

EQUIPMENT UNDER TEST (EUT) DETAILS
GENERAL
        The Google Inc. model H0ME is an 802.11abgn/ac SISO Media Streaming Device
        capable of working both in 2.4GHz and 5.0GHz bands

        The sample was received on July 29, 2016 and tested on July 29, 2016. The EUT
        consisted of the following component(s):

           Manufacturer          Model           Description            Serial Number
            Google Inc.         H0ME       Media Streaming Device C054520 (DSN: 6629AZZB70)

        The manufacturer declared values for the EUT operational characteristics that affect DFS
        are as follows:

                Operating Modes (5250 – 5350 MHz, 5470 – 5725 MHz)
                                Client Device (no In Service Monitoring, no Ad-Hoc mode)


                Antenna Gains / EIRP (5250 – 5350 MHz, 5470 – 5725 MHz)
                                                         5250 – 5350 MHz 5470 – 5725 MHz
                          Lowest Antenna Gain (dBi)             5.3             5.7
                          Highest Antenna Gain (dBi)            5.3             5.7
                          EIRP Output Power (dBm)              23.5            22.2

                                Power can exceed 200mW eirp


                Channel Protocol
                                IP Based
                                Frame Based
                                OTHER _____________________


ENCLOSURE
        The EUT enclosure measures approximately 8.5cm in diameter by 14.0cm in height. It is
        primarily constructed of uncoated coated plastic.

MODIFICATIONS
        The EUT did not require modifications during testing in order to comply with the
        requirements of the standard(s) referenced in this test report.




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NTS Silicon Valley -- EMC Department                                                        Test Report
                                                                        Report Date: September 13, 2016

SUPPORT EQUIPMENT
        The following equipment was used as local support equipment for testing:

        Manufacturer         Model           Description        Serial Number          FCC ID
           Airlink       ASW105/B1        Ethernet Switch      0746B1A60225               -
             HP         Compaq6910P Laptop Computer                    -                  -
            Cisco          WAP371           Access Point       CCQ18472BS8           N89-WAP371
        The italicized device was the master device.

EUT INTERFACE PORTS
        The I/O cabling configuration during testing was as follows:

                                           Cable(s)
                Port      Connected To     Description      Shielded or Unshielded Length (m)
          DC Power         AC/DC Adapter        coax                   shielded              1.5


EUT OPERATION
        The EUT was operating with the following software listed below. The software is
        secured by encryption to prevent the user from disabling the DFS function.

                 Client Device: 1.21

        The streamed file was iperf and the client device configured to receive the file. The
        channel loading was evaluated to be 21.1% (refer to figure 9) meeting the approximately
        17% loading as required by FCC KDB 905462 D02

        Refer to the H0ME theory of operation document for the information about the power-on
        cycle time, statement about security of radar detection parameters and initial channel
        selection.

        The RF energy emitted from the H0ME is below the FCC 15.109 limits for unintentional
        radiators when it is not transmitting. Refer to separate report covering unintentional
        emissions.




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NTS Silicon Valley -- EMC Department                                                           Test Report
                                                                           Report Date: September 13, 2016

RADAR WAVEFORMS

                             Table 2 - FCC Short Pulse Radar Test Waveforms
                                                                       Minimum          Minimum
                     Pulse Width           PRI              Pulses /
 Radar Type                                                            Detection        Number of
                        (µsec)            (µsec)             burst
                                                                       Percentage         Trials
       0                 1                 1428               18               See Note 1
           1a                        15 unique PRI                                         15
                                    values randomly
                                      selected from
                                    the list of 23 PRI
                                                            Round
                                    values in Note 2
                                                              Up
                                          below
   1                     1                                  1/360*       60%
           1b                        518-3066 with                                           15
                                                            19*106/
                                        minimum
                                                            PRI µsec
                                     increment of 1
                                     µsec, excluding
                                       PRI values
                                      selected in 1a
      2                 1-5              150-230          23-29          60%                30
      3                6-10              200-500          16-18          60%                30
      4               11-20              200-500          12-16          60%                30
 Aggregate (Radar Types 1-4)                                             80%                120
 Note 1: Short Pulse Radar Type 0 is used for the detection bandwidth test, channel move time, and
 channel closing time tests.
 Note 2: Pulse repetition intervals values for Test 1a above
 Pulse Repetition Frequency          Pulse Repetition Frequency      Pulse Repetition Interval
 Number                              (Pulses Per Second)             (Microseconds)
                1                                  1930.5                          518
                2                                  1858.7                          538
                3                                  1792.1                          558
                4                                  1730.1                          578
                5                                  1672.2                          598
                6                                  1618.1                          618
                7                                  1567.4                          638
                8                                  1519.8                          658
                9                                  1474.9                          678
                10                                 1432.7                          698
                11                                 1392.8                          718
                12                                  1355                           738
                13                                 1319.3                          758
                14                                 1285.3                          778
                15                                 1253.1                          798
                16                                 1222.5                          818
                17                                 1193.3                          838
                18                                 1165.6                          858
                19                                  1139                           878
                20                                 1113.6                          898
                21                                 1089.3                          918
                22                                 1066.1                          938
                23                                  326.2                          3066




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NTS Silicon Valley -- EMC Department                                                       Test Report
                                                                       Report Date: September 13, 2016


                            Table 3 - FCC Long Pulse Radar Test Waveforms
                 Pulse     Chirp                                       Minimum         Minimum
   Radar                                PRI     Pulses /   Number
                Width     Width                                        Detection       Number of
   Type                                (µsec)    burst     of Bursts
                (µsec)    (MHz)                                        Percentage        Trials
     5          50-100     5-20        1000-      1-3        8-20         80%             30
                                       2000

                         Table 4 - FCC Frequency Hopping Radar Test Waveforms
                                                           Hopping
                 Pulse                          Hopping                Minimum         Minimum
   Radar                   PRI     Pulses /                Sequence
                Width                             Rate                 Detection       Number of
   Type                   (µsec)    hop                     Length
                (µsec)                           (kHz)                 Percentage        Trials
                                                            (msec)
     6            1        333           9       0.333       300            70%            30




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NTS Silicon Valley -- EMC Department                                                         Test Report
                                                                         Report Date: September 13, 2016

DFS TEST METHODS
RADIATED TEST METHOD
        The combination of master and slave devices is located in an anechoic chamber. The
        simulated radar waveform is transmitted from a directional horn antenna (typically an
        EMCO 3115) toward the unit performing the radar detection (radar detection device,
        RDD). Every effort is made to ensure that the main beam of the EUT’s antenna is
        aligned with the radar-generating antenna which is oriented in vertical polarization.

                                               Anechoic Chamber
                Master Device




                                                                                   Radar
                                                     ~3m                         Antenna


                       Monitoring
                        Antenna




                                Traffic Monitoring                       Radar Generation
                                      System                                 System




                       Figure 1 Test Configuration for radiated Measurement Method




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NTS Silicon Valley -- EMC Department                                                      Test Report
                                                                      Report Date: September 13, 2016
        The signal level of the simulated waveform is set to a reference level equal to the
        threshold level (plus 1dB if testing against FCC requirements). Lower levels may also be
        applied on request of the manufacturer. The level reported is the level at the RDD
        antenna and so it is not corrected for the RDD’s antenna gain. The RDD is configured
        with the lowest gain antenna assembly intended for use with the device.

        The signal level is verified by measuring the CW signal level from the radar generation
        system using a reference antenna of gain GREF (dBi). The radar signal level is calculated
        from the measured level, R (dBm), and any cable loss, L (dB), between the reference
        antenna and the measuring instrument:

                Applied level (dBm) = R – GREF + L

        If both master and client devices have radar detection capability then the device not under
        test is positioned with absorbing material between its antenna and the radar generating
        antenna, and the radar level at the non RDD is verified to be at least 20dB below the
        threshold level to ensure that any responses are due to the RDD detecting radar.

        The antenna connected to the channel monitoring subsystem is positioned to allow both
        master and client transmissions to be observed, with the level of the EUT’s transmissions
        between 6 and 10dB higher than those from the other device.




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NTS Silicon Valley -- EMC Department                                                       Test Report
                                                                       Report Date: September 13, 2016

DFS MEASUREMENT INSTRUMENTATION

RADAR GENERATION SYSTEM
        An Agilent PSG is used as the radar-generating source. The integral arbitrary waveform
        generators are programmed using Agilent’s “Pulse Building” software and NTS Silicon
        Valley custom software to produce the required waveforms, with the capability to
        produce both un-modulated and modulated (FM Chirp) pulses. Where there are multiple
        values for a specific radar parameter then the software selects a value at random and, for
        FCC tests, the software verifies that the resulting waveform is truly unique.

        With the exception of the hopping waveforms required by the FCC’s rules (see below),
        the radar generator is set to a single frequency within the radar detection bandwidth of
        the EUT. The frequency is varied from trial to trial by stepping in 5MHz steps. For radar
        types with variable parameters, each detection probability trial is performed using a
        unique set of parameters obtained by a random selection with uniform distribution for
        each of the variable parameters.

        Frequency hopping radar waveforms are simulated using a time domain model. A
        randomly hopping sequence algorithm (which uses each channel in the hopping radar’s
        range once in a hopping sequence) generates a hop sequence. A segment of the first 100
        elements of the hop sequence are then examined to determine if it contains one or more
        frequencies within the radar detection bandwidth of the EUT. If it does not then the first
        element of the segment is discarded and the next frequency in the sequence is added. The
        process repeats until a valid segment is produced. The radar system is then programmed
        to produce bursts at time slots coincident with the frequencies within the segment that fall
        in the detection bandwidth. The frequency of the generator is stepped in 1 MHz
        increments across the EUT’s detection range.

        The radar signal level is verified during testing using a long duration pulse waveform
        generated in the same manner as the normal radar generated signals.

        The generator output is connected to the coupling port of the conducted set-up or to the
        radar-generating antenna. The radar generating antenna (when used) is oriented for
        vertical polarization.




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NTS Silicon Valley -- EMC Department                                                          Test Report
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CHANNEL MONITORING SYSTEM
        Channel monitoring is achieved using a spectrum analyzer and digital storage
        oscilloscope. The analyzer is configured in a zero-span mode, center frequency set to the
        radar waveform’s frequency or the center frequency of the EUT’s operating channel.
        The IF output of the analyzer is connected to one input of the oscilloscope.

        A signal generator output is set to send either the modulating signal directly or a pulse
        gate with an output pulse co-incident with each radar pulse. This output is connected to a
        second input on the oscilloscope and the oscilloscope displays both the channel traffic
        (via the if input) and the radar pulses on its display.

        For in service monitoring tests the analyzer sweep time is set to > 20 seconds and the
        oscilloscope is configured with a data record length of 10 seconds for the short duration
        and frequency hopping waveforms, 20 seconds for the long duration waveforms. Both
        instruments are set for a single acquisition sequence. The analyzer is triggered 500ms
        before the start of the waveform and the oscilloscope is triggered directly by the
        modulating pulse train. Timing measurements for aggregate channel transmission time
        and channel move time are made from the oscilloscope data, with the end of the
        waveform clearly identified by the pulse train on one trace. The analyzer trace data is
        used to confirm that the last transmission occurred within the 10-second record of the
        oscilloscope. If necessary the record length of the oscilloscope is expanded to capture
        the last transmission on the channel prior to the channel move.

        Channel availability check time timing plots are made using the analyzer. The analyzer
        is triggered at start of the EUT’s channel availability check and used to verify that the
        EUT does not transmit when radar is applied during the check time.

        The analyzer detector and oscilloscope sampling mode is set to peak detect for all plots.




                     Figure 2 SA Noise Floor During Testing (radar shown at 520 ms)


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NTS Silicon Valley -- EMC Department                                                         Test Report
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RADAR GENERATOR PLOTS
        The radar generator was connected to Spectrum Analyzer (SA) input, with the SA set to
        zero span, 3 MHz RBW, 3 MHz VBW. The SA IF output was connected to an
        oscilloscope to provide timing plots.




                                 Figure 3 FCC Type 1 Radar (18 pulses)




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                                 Figure 4 FCC Type 2 Radar (24 pulses)




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                                 Figure 5 FCC Type 3 Radar (17 pulses)




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                                 Figure 6 FCC Type 4 Radar (16 pulses)




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NTS Silicon Valley -- EMC Department                                                            Test Report
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                 Figure 7 FCC Type 5 Radar (burst with three pulses, 1650 µs first period)
The shape is round due to chirped frequency during pulse as the SA is in zero span with 3 MHz
BW.




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                           Figure 8 FCC Type 6 Radar (9 pulses in each burst)




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NTS Silicon Valley -- EMC Department                                                      Test Report
                                                                      Report Date: September 13, 2016

DFS MEASUREMENT METHODS
DFS – CHANNEL CLOSING TRANSMISSION TIME AND CHANNEL MOVE TIME
        Channel clearing and closing times are measured by applying a burst of radar with the
        device configured to change channel and by observing the channel for transmissions.
        The time between the end of the applied radar waveform and the final transmission on the
        channel is the channel move time.

        The aggregate transmission closing time is measured using the following way:

                FCC/MSIP Notice No. 2015-95 – the total time of all individual transmissions
                from the EUT that are observed starting 200ms at the end of the last radar pulse in
                the waveform. This value is required to be less than 60ms.

DFS – CHANNEL NON-OCCUPANCY AND VERIFICATION OF PASSIVE SCANNING
        The channel that was in use prior to radar detection by the master is additionally
        monitored for 30 minutes to ensure no transmissions on the vacated channel over the
        required non-occupancy period. This is achieved by tuning the spectrum analyzer to the
        vacated channel in zero-span mode and connecting the IF output to an oscilloscope. The
        oscilloscope is triggered by the radar pulse and set to provide a single sweep (in peak
        detect mode) that lasts for at least 30 minutes after the end of the channel move time.

        For devices with a client-mode that are being evaluated against FCC rules the
        manufacturer must supply an attestation letter stating that the client device does not
        employ any active scanning techniques (i.e. does not transmit in the DFS bands without
        authorization from a Master device).




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NTS Silicon Valley -- EMC Department                                                     Test Report
                                                                     Report Date: September 13, 2016

 Appendix A Test Equipment Calibration Data


 Manufacturer         Description                          Model #        Asset #        Cal Due
                      EMC Spectrum Analyzer, 9 kHz - 6.5
 Hewlett Packard                                           8595EM           780        30-Mar-17
                      GHz
 ETS Lindgren         Antenna, Horn, 1-18 GHz              3117             1662       13-Jun-18
 Tektronix            500MHz, 2CH, 5GS/s Scope             TDS5052B         2118       10-Nov-16
 Agilent              PSG, Vector Signal Generator,
                                                           E8267D           3011       02-Feb-17
 Technologies         (250kHz - 20GHz)




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NTS Silicon Valley -- EMC Department                                                        Test Report
                                                                        Report Date: September 13, 2016

 Appendix B Test Data Tables for Radar Detection Probability
The plot below shows the channel loading during testing as evaluated over a 0.4 second period.
The traffic was generated by iperf.




        Figure 9 Channel Utilization During In-Service Detection Measurements (80MHz ac mode)




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NTS Silicon Valley -- EMC Department                                                                Test Report
                                                                                Report Date: September 13, 2016

    Appendix C Test Data Tables and Plots for Channel Closing
FCC PART 15 SUBPART E Channel Closing Measurements

                       Table 5 - FCC Part 15 Subpart E Channel Closing Test Results
                                            Channel Closing                Channel Move
     Waveform Type                        Transmission Time 1                   Time                  Result
                                         Measured        Limit          Measured     Limit
     Radar Type 0                         0.4 ms        60 ms            0.2 s       10 s              Pass




          Figure 10 Channel Closing Time and Channel Move Time (80MHz ac mode) – 40 second plot




1
 Channel closing time for FCC measurements is the aggregate transmission time starting from 200ms after the end
of the radar signal to the completion of the channel move.
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        Figure 11 Close-Up of Transmissions Occurring More Than 200ms After The End of Radar
                                          (80MHz acmode)




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NTS Silicon Valley -- EMC Department                                                      Test Report
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                         Figure 12 Radar Channel Non-Occupancy Plot (80MHz)


The non-occupancy plot was made over a 30-minute time period following the channel move
time with the analyzer IF output connected to the scope and tuned to the vacated channel. No
transmissions were observed on the vacated channel after the channel move had been completed.

After the channel move the client re-associated with the master device on the new channel.




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 Appendix D Test Configuration Photograph(s)




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                                              End of Report

                                  This page is intentionally blank and
                                  marks the last page of this test report.




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Document Modified: 2017-12-15 16:41:13

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