DFS Report

FCC ID: PY7PM-0802

Test Report

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FCCID_2345616

                                    TEST REPORT
           Test Report No. : UL-RPT-RP10295122JD01M V4.0
Manufacturer                 :   Sony Mobile Communications Inc.

FCC ID                       :   PY7PM-0801

Technology                   :   WLAN

Test Standard(s)             :   FCC Part 15.407(h)(2)




1.     This test report shall not be reproduced in full or partial, without the written approval of UL VS LTD.
2.     The results in this report apply only to the sample(s) tested.
3.     The sample tested is in compliance with the above standard(s).
4.     The test results in this report are traceable to the national or international standards.
5.     Version 4.0 supersedes all previous versions


                        Date of Issue:                        31 July 2014

                        Checked by:

                                                             Sarah Williams
                                                       Engineer, Radio Performance

                        Issued by :


                                                  pp
                                                             John Newell
                                                         Group Quality Manager
                                                             Basingstoke,
                                                              UL VS LTD



                                                              This laboratory is accredited by UKAS.
                                                              The tests reported herein have been
                                                              performed in accordance with its’ terms
                                                              of accreditation.




UL VS LTD
Pavilion A, Ashwood Park, Ashwood Way, Basingstoke, Hampshire, RG23 8BG, UK
Telephone: +44 (0)1256 312000
Facsimile: +44 (0)1256 312001


TEST REPORT                                    SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                              ISSUE DATE: 31 JULY 2014



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TEST REPORT                                                                            SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                                             ISSUE DATE: 31 JULY 2014



Table of Contents
1. Customer Information................................................................................................................ 4
2. Summary of Testing................................................................................................................... 5
    2.1. General Information                                                                                                             5
    2.2. Summary of Test Results                                                                                                         5
    2.3. Methods and Procedures                                                                                                          5
    2.4. Deviations from the Test Specification                                                                                          5
3. Equipment Under Test (EUT) .................................................................................................... 6
    3.1. Identification of Equipment Under Test (EUT)                                                                              6
    3.2. Description of EUT                                                                                                        6
    3.3. Modifications Incorporated in the EUT                                                                                     6
    3.4. Additional Information Related to Testing                                                                                 6
    3.5. Support Equipment                                                                                                         7
4. Operation and Monitoring of the EUT during Testing ............................................................. 8
    4.1. Operating Modes                                                                                            8
    4.2. Configuration and Peripherals                                                                              8
5. Measurements, Examinations and Derived Results ...............................................................12
    5.1. General Comments                                                                                        12
    5.2. Test Results                                                                                            13
        5.2.1. Channel Closing Transmission Time and Channel Move Time                                           13
6. Measurement Uncertainty ........................................................................................................16
7. Report Revision History ...........................................................................................................17
Appendix 1. Radar Calibration .....................................................................................................18
Appendix 2. Aeroflex Test Platform Approval email...................................................................19
Appendix 3. System Noise Floor Reference Plots ......................................................................20
Appendix 4. Channel Loading ......................................................................................................21




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TEST REPORT                                         SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                   ISSUE DATE: 31 JULY 2014




1. Customer Information
Company Name:     Sony Mobile Communications Inc.
Address:          Nya Vattentornet Mobilvägen 10
                  Lund 22188
                  Sweden




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TEST REPORT                                                              SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                           ISSUE DATE: 31 JULY 2014



2. Summary of Testing
2.1. General Information
Specification Reference:         47CFR15.407
Specification Title:             Code of Federal Regulations Volume 47 (Telecommunications):
                                 Part 15 Subpart E (Unlicensed National Information Infrastructure Devices) -
                                 Section 15.407
Site Registration:               209735
Location of Testing:             UL VS LTD, Unit 3 Horizon, Wade Road, Kingsland Business Park,
                                 Basingstoke, Hampshire, RG24 8AH, United Kingdom
Test Date:                       09 June 2014


2.2. Summary of Test Results
FCC Reference
                                  Measurement                                                          Result
(47CFR)
Part 15.407(h)(2)(iii)            Channel Closing Transmission Time and Channel Move Time
Key to Results

   = Complied            = Did not comply

Note(s):

1. The Manufacturer confirms that information regarding the parameters of the radar waveforms is not
   available to the end user.


2.3. Methods and Procedures
Reference:                        FCC KDB 905462 D02 UNII DFS Compliance Procedures v01 (June 2, 2014)
Title:                            Compliance Measurement Procedures for Unlicensed-National Information
                                  Infrastructure Devices Operating in the 5250-5350 MHz and 5470-5725 MHz
                                  Bands Incorporating Dynamic Frequency Selection

2.4. Deviations from the Test Specification
For the measurements contained within this test report, there were no deviations from, additions to, or
exclusions from the test specification identified above.




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TEST REPORT                                                         SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                      ISSUE DATE: 31 JULY 2014




3. Equipment Under Test (EUT)
3.1. Identification of Equipment Under Test (EUT)
Brand Name:                                Sony
IMEI:                                      004402452752656
Serial Number:                             CB5A1Z1RY2
Hardware Version Number:                   A
Software Version Number:                   23.0.A.0.204
FCC ID:                                    PY7PM-0801

3.2. Description of EUT
The equipment under test (EUT) was a GSM/WCDMA/LTE Phone + Bluetooth, DTS/UNII a/b/g/n/ac + NFC
& ANT+.
The EUT supports DFS as a Client without Radar Detection only. Wi-Fi hotspot/tethering mode is not
operational in the 5 GHz bands.


3.3. Modifications Incorporated in the EUT
No modifications were applied to the EUT during testing.


3.4. Additional Information Related to Testing
Technology Tested:                          Unlicensed National Information Infrastructure Devices (U-NII)
Type of Unit:                               Transceiver
Modulation:                                 BPSK, QPSK, 16QAM, 64QAM & 256QAM
Data Rates:                                 IEEE 802 11a              6, 9, 12, 18, 24, 36, 48 & 54 Mbps

                                            IEEE 802.11n HT20         MCS0 to MCS7 (1 spatial stream)

                                            IEEE 802.11n HT40         MCS0 to MCS7 (1 spatial stream)

                                            IEEE 802.11ac VHT20       MCS0 to MCS8 (1 spatial stream)

                                            IEEE 802.11ac VHT40       MCS0 to MCS9 (1 spatial stream)

                                            IEEE 802.11ac VHT80       MCS0 to MCS9 (1 spatial stream)

Power Supply Requirement(s):                Nominal                   3.8 VDC
                                            Minimum                   3.42 VDC
                                            Maximum                   4.18 VDC
Transmit / Receive Frequency Range:         5150 to 5350 MHz
                                            5470 to 5850 MHz
Transmit / Receive Channels Tested at                                         Channel Centre Frequency
                                                      Channel ID
40 MHz Bandwidth setting:                                                              (MHz)
                                                           102                            5510




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TEST REPORT                                                         SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                    ISSUE DATE: 31 JULY 2014



3.5. Support Equipment
The following support equipment was used to exercise the EUT during testing:

Description:                              Wireless Dual Band Router (DFS Master)
Brand Name:                               Netgear
Model Name or Number:                     N600
FCC ID:                                   PY311100155
Serial Number:                            2P021C7W00226


Description:                              Laptop Computer
Brand Name:                               Dell
Model Name or Number:                     Lattitude D610
Serial Number:                            GN20Q1J


Brand Name:                               Sony
Description:                              AC Charger
Model Name or Number:                     EP880




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TEST REPORT                                                          SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                       ISSUE DATE: 31 JULY 2014




4. Operation and Monitoring of the EUT during Testing
4.1. Operating Modes
The EUT was tested in the following operating modes, unless otherwise stated:
    •    Operating on the channel selected by the Master device in either UNII Band 2a or UNII Band 2c.
    •    The Master device controls the channel bandwidth and modulation of the EUT. The Master device
         was set to 802.11n / MCS0 with 40 MHz channel bandwidth.
    •    KDB 905462 D02 UNII DFS Compliance Procedures states in Table 2 the EUT should be tested at
         maximum channel bandwidth (80 MHz for 802.11ac mode). However, the exception for 802.11ac
         client devices in KDB 905462 D03 U-NII Client Devices Without Radar Detection Capability was
         used to test the client device at 40 MHz channel bandwidth due to limited availability of FCC
         approved DFS-capable 802.11ac routers.
    •    For the required channel loading of >17% in KDB 905642 D02 7.7 c), a data transfer was performed
         between a test computer and the EUT. This gave a channel loading (duty cycle) of 19.3% at the
         modulation scheme and bandwidth above. See Appendix 4 Channel Loading for further details.


4.2. Configuration and Peripherals
The EUT was tested in the following configuration(s):
    •    The EUT is a DFS Client without Radar Detection capability. It was tested in combination with an
         FCC approved Netgear DFS enabled router (FCC ID: PY311100155) being used as the Master. A
         Radar Type 0 was injected to the Master to test the Clients Channel Move Time and Channel
         Closing Transmission Time after receiving the channel shutdown command form the Master.
    •    All measurements were made using a conducted link. The EUT has one external antenna port fitted
         for test purposes. System losses for the interconnecting hardware were measured and taken into
         consideration.
    •    The Radar test platform used was the Aeroflex DFS Radar 110105 Simulator and Analyser which
         has been verified and accepted by Andrew Leimer of the FCC/NTIA on the 23rd of September 2011.
         Refer to Appendix 2 of this Test Report for the original confirmation email.
    •    The DFS detection threshold of -57.5 dBm (-62 + 1 dB + 3.5 dBi) was used at the Master device
         antenna port. Note this is not dependent on the EUT EIRP, Spectral Density or EUT Antenna Gain,
         only the antenna gain of the master device, as the EUT does not have radar detection.
    •    The Master device used for test was set to 17 dBm / 50 mW with TPC enabled.
    •    Plots and data were captured using a Rohde and Schwarz FSV 30 Test Receiver in spectrum
         analyser mode. The number of data points was increased to maximum and the trace data exported
         so it could be analysed in far greater detail than available on the built-in display.
    •    The Channel Move Time was the time taken from the end of the radar waveform to the time the
         Client ceased transmissions. The Channel Closing Transmission Time was calculated to the nearest
         sample from any additional pulses occurring >200 ms after the end of the radar.




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TEST REPORT                                                             SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                          ISSUE DATE: 31 JULY 2014



Setup diagram for test of DFS Client without Radar Detection.


      Radar Test
        Signal
      Generator



                                            3dB RF
                                            Splitter


                                                                                            Spectrum
                                                                                            Analyser




                                        1
        LAN                            RF
                                    Circulator
                                                                           25
                        20      2                3     1            3
                                                          RF               dB
  Master Device         dB                                                                    Client
                                                       Circulator                             Device
                                                                                              (EUT)
                                                            2

                                                           50Ω
        PSU                                                                                    PSU



Rationale
The setup shown above ensures the waveforms indicated on the spectrum analyser are in order of
magnitude. The circulators have typically 18 dB attenuation in the reverse direction. The left-hand circulator
directs the radar towards the master, ensuring there is not an overly large radar pulse into the client (EUT)
even though there is the same attenuation between the client and the radar generator. The radar signal
should be approximately 56 dB smaller at the client antenna port than at the master. The right-hand
circulator is to give the same path loss between master and client in both directions of the 802.11
communications link.
The Radar signal is most predominant on the spectrum analyser, coming straight through a 3 dB splitter. The
           nd
client is 2 largest, being attenuated by the 25 dB, and the (typically 18 dB) isolation from the directional
splitter. The smallest signal is the master, being attenuated by 20 dB from the attenuator and approximately
18 dB from the left-hand circulator and 18 dB across the splitter.
The RF path from the radar generator to the DFS Master crosses no isolated ports of any splitters or
circulators and any change of impedance in load between calibration and test is isolated from any circulators
by 50 Ω attenuators which further minimises mismatch. This setup therefore meets the requirements of
KDB 905462 D02 clause 7.2 points (A) and (B) whilst providing greater radar generator amplitude headroom
and lower radar signal at the client.




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TEST REPORT                                                                    SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                                  ISSUE DATE: 31 JULY 2014



Applicability of DFS requirements prior to use of a channel

                Requirement                                            Operational Mode

                                                    Master                     Client                    Client
                                                                           Without Radar               With Radar
                                                                             Detection                  Detection
       Non-Occupancy Period                           Yes                   Not required                   Yes
      DFS Detection Threshold                         Yes                   Not required                   Yes
   Channel Availability Check Time                    Yes                   Not required               Not required
         Uniform Spreading                            Yes                   Not required                   Yes

Applicability of DFS requirements during normal operation

                  Requirement                                            Operational Mode

                                               Master Device or Client with               Client Without Radar
                                                    Radar Detection                             Detection
       DFS Detection Threshold                            Yes                                  Not required
   Channel Closing Transmission Time                      Yes                                      Yes
          Channel Move Time                               Yes                                      Yes
       U-NII Detection Bandwidth                          Yes                                  Not required

 Additional requirements for devices           Master Device or Client with               Client Without Radar
   with multiple bandwidth modes                    Radar Detection                             Detection
    U-NII Detection Bandwidth and
                                                All BW modes must be tested                     Not required
    Statistical Peformance Check
   Channel Move Time and Channel                 Test using widest BW mode             Test using the widest BW
      Closing Transmission Time                           available                    mode available for the link
             All other tests                        Any single BW mode                        Not required
 Note: Frequencies selected for statistical performance check (Section 7.8.4) should include several frequencies within
 the radar detection bandwidth and frequencies near the edge of the radar detection bandwidth. For 802.11 devices it is
 suggested to select frequencies in all 20 MHz channel blocks and a null frequencies between the bonded 20 MHz
 channel blocks.

Interference Threshold values, Master or Client incorporating In-Service Monitoring

                     Maximum Transmit Power                                            Value (see note)
                        EIRP ≥ 200 milliwatt                                               -64 dBm
                      EIRP < 200 milliwatt and
                                                                                           -62 dBm
                power spectral density < 10 dBm/MHz
  Note 1: This is the level at the input of the receiver assuming a 0 dBi receive antenna Note 2: Throughout these test
  procedures an additional 1dB has been added to the amplitude of the test transmission waveforms to account for
  variations in measurement equipment. This will ensure that the test signal is at or above the detection threshold level
  to trigger a DFS response. Note 3: EIRP is based on the highest antenna gain. For MIMO devices refer to KDB
  Publication 662911 D01.




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TEST REPORT                                                                SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                               ISSUE DATE: 31 JULY 2014



DFS Response requirement values
                          Parameter                                                      Value
                    Non-occupancy period                                         Minimum 30 minutes
                Channel Availability Check Time                                      60 seconds
                     Channel Move Time                                        10 seconds See Note 1.
                                                                        200 milliseconds + an aggregate of 60
            Channel Closing Transmission Time                      milliseconds over remaining 10 second period.
                                                                                  See Notes 1 and 2.
                                                                   Minimum 100% of the U-NII 99% transmission
                  U-NII Detection Bandwidth
                                                                            power bandwidth. See Note 3.
 Note 1: Channel Move Time and the Channel Closing Transmission Time should be performed with Radar Type 0.
 The measurement timing begins at the end of the Radar Type 0 burst. Note 2: The Channel Closing Transmission
 Time is comprised of 200 milliseconds starting at the beginning of the Channel Move Time plus any additional
 intermittent control signals required to facilitate a Channel move (an aggregate of 60 milliseconds) during the
 remainder of the 10 second period. The aggregate duration of control signals will not count quiet periods in between
 transmissions. Note 3: During the U-NII Detection Bandwidth detection test, radar type 0 should be used. For each
 frequency step the minimum percentage of detection is 90 percent. Measurements are performed with no data traffic.

Short Pulse Radar Test Waveforms
      Radar Type           Pulse Width                PRI               Pulses         Minimum            Minimum
                          (Microseconds)        (Microseconds)                       Percentage of         Trials
                                                                                      Successful
                                                                                       Detection

            0                     1                   1428                18           See Note 1        See Note 1
 Note 1: should be used for the detection bandwidth test, channel move time and channel closing time tests.




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TEST REPORT                                                           SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                        ISSUE DATE: 31 JULY 2014



5. Measurements, Examinations and Derived Results
5.1. General Comments
Measurement uncertainties are evaluated in accordance with current best practice. Our reported expanded
uncertainties are based on standard uncertainties, which are multiplied by an appropriate coverage factor to
provide a statistical confidence level of approximately 95%. Please refer to Section 6 Measurement
Uncertainty for details.
In accordance with UKAS requirements all the measurement equipment is on a calibration schedule. All
equipment was within the calibration period on the date of testing.




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VERSION 4.0                                                                       ISSUE DATE: 31 JULY 2014




5.2. Test Results
5.2.1. Channel Closing Transmission Time and Channel Move Time
Test Summary:

Test Engineer:                           Philip Harrison             Test Date:        09 June 2014
Test Sample IMEI:                        004402452752656


FCC Reference:                           Part 15.407(h)(2)(iii)
Test Method Used:                        KDB 905462 D02 Section 7.8.3

Environmental Conditions:

Temperature (°C):                        25
Relative Humidity (%):                   47

Note(s):

1. The channel move time is the time taken from the end of the radar burst to the ceasing of transmissions
   of the EUT.
2. The Total Aggregate Channel Closing Transmission Time shown in the table below was measured from
   200 ms after the end of the radar burst and compared to the 60 ms limit.
3. The smaller transmissions seen in the plot that are less than -52 dBm, come from the Master device and
   not from the Client, these transmissions can be ignored for the below results.

Results:

Radar #        Channel        Channel          Total Aggregate    Limit         Margin          Status
              Frequency      Move Time        Channel Closing     (ms)           (ms)
                (MHz)          (ms)               Time after
                                              first 200 ms (ms)
    1            5510          129.75                 -           10000        9870.25         Complied
    1            5510             -                  0              60            60           Complied

Radar burst type 0 was detected and channel move occurred.




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TEST REPORT                                                    SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                               ISSUE DATE: 31 JULY 2014



Channel Closing Transmission Time and Channel Move Time (continued)




                Channel Move Time 5510 MHz – Short Radar (Type 0) - Full 10 seconds




                 Channel Move Time 5510 MHz – Short Radar (Type 0) – Zoomed Plot




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TEST REPORT                                                        SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                   ISSUE DATE: 31 JULY 2014




Channel Closing Transmission Time and Channel Move Time (continued)
Test Equipment Used:

Asset       Instrument           Manufacturer    Type No.     Serial No.    Date          Cal.
No.                                                                         Calibration   Interval
                                                                            Due           (Months)
M1631       DFS Test System      Aeroflex        PXI 3000     300110/291    11 Jun 2015      24
M1873       Spectrum Analyser    Rohde &         FSV30        103074        15 May 2015      12
                                 Schwarz
A030        Step Attenuator      Narda           445-69       01544         Calibrated        -
                                                                            before use
A090        Step Attenuator      Narda           743-80       01057         Calibrated        -
                                                                            before use
A2179       Coaxial Circulator   AtlanTecRF      ACC-20130-   120409230     Calibrated        -
            4-18GHz                              SF-SF-SF                   before use
A2182       Coaxial Circulator   AtlanTecRF      ACC-20130-   120409231     Calibrated        -
            4-18GHz                              SF-SF-SF                   before use
A2121       Splitter             Mini-Circuits   ZN2PD-63-    S             Calibrated        -
                                                 S+           UU12701203    before use
M1657       Thermohygrometer     JM              30.5015.13   None stated   14 Mar 2015      12
                                 Handelspunkt




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TEST REPORT                                                           SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                        ISSUE DATE: 31 JULY 2014



6. Measurement Uncertainty
No measurement or test can ever be perfect and the imperfections give rise to error of measurement in the
results. Consequently the result of a measurement is only an approximation to the value of the measurand
(the specific quantity subject to measurement) and is only complete when accompanied by a statement of
the uncertainty of the approximation.
The expression of uncertainty of a measurement result allows realistic comparison of results with reference
values and limits given in specifications and standards.
The uncertainty of the result may need to be taken into account when interpreting the measurement results.
The reported expanded uncertainties below are based on a standard uncertainty multiplied by an appropriate
coverage factor such that a confidence level of approximately 95% is maintained. For the purposes of this
document “approximately” is interpreted as meaning “effectively” or “for most practical purposes”.

                                                                                Confidence      Calculated
Measurement Type                                          Range
                                                                                 Level (%)      Uncertainty
DFS Radar Amplitude                              5.15 GHz to 5.825 GHz              95%          ±2.17 dB
Channel Shutdown Timing                          5.15 GHz to 5.825 GHz              95%          ±0.45 ms

The methods used to calculate the above uncertainties are in line with those recommended within the
various measurement specifications. Where measurement specifications do not include guidelines for the
evaluation of measurement uncertainty the published guidance of the appropriate accreditation body is
followed.




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VERSION 4.0                                                              ISSUE DATE: 31 JULY 2014



7. Report Revision History
Version       Revision Details
Number        Page No(s)   Clause   Details
1.0           -            -        Initial Version
2.0           -            -        Removal of photographs from report
3.0           10 & 11      -        Additional information added
4.0           -            -        EUT Description update




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TEST REPORT                                                           SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                        ISSUE DATE: 31 JULY 2014



Appendix 1. Radar Calibration
Radar calibration procedure.
The system was configured as shown in section 4.2, but with the spectrum analyser port terminated into a
50Ω load, and a spectrum analyser connected to the master port. The radar was then replayed by the
Aeroflex DFS test system, the waveform captured, and the amplitude adjusted until correct.
The accuracy of the radars pulses themselves and the software which creates them has already been
approved by the FCC and NTIA. See Appendix 3 for details.
Due to the difficulty of measuring the 1 µs burst accurately across the duration of a radar pulse sequence the
output of the Radar generator with both CW and test Radars has been correlated. The test network loss is
then calibrated using a CW signal from the radar generator, and an offset put into the radar generation
software. All radars are then generated at the correct level at the Master device antenna port.
Below is an example plot of the type 0 radar burst at the DFS master port of the attenuation network. The
Aeroflex signal generator was set to –57.5 dBm output and the correct path loss offset applied.




                Date:9.JUN.2014 21:14:42



                                               Type 0 Radar




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VERSION 4.0                                                                 ISSUE DATE: 31 JULY 2014



Appendix 2. Aeroflex Test Platform Approval email

From: Andrew Leimer [mailto:Andrew.Leimer@fcc.gov]
Sent: Friday, September 23, 2011 4:24 PM
To: Chisham, Steve
Cc: Carey, Tim; Hack, Barry; Rashmi Doshi; Joe Dichoso
Subject: RE: Certification for Aeroflex DFS solution


Hello Steve,



The Aeroflex "DXI based DFS test solution" system used for DFS alternative radar signal
generation has been approved by the FCC and NTIA.



This approval permits the system to be used by labs in the testing of DFS devices for equipment
authorization Certification. It is recommended that applicants that use your system for testing
include a statement in the Test Report or a Letter Exhibit stating that the system has FCC and
NTIA approval. This E-mail is your record of this approval.
Note that the appropriate term for your system is Approved as the term Certification is reserved for
devices gaining equipment authorization through the FCC or a TCB.



Regards,



Andy Leimer

FCC/OET/EACB




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TEST REPORT                                                             SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                       ISSUE DATE: 31 JULY 2014




Appendix 3. System Noise Floor Reference Plots
As required by Section 8.3.4(iii) of KDB 905462 D02, the following plot shows the reference noise
floor of the system used during measurement. It also shows compliance with Section 8.3.7 of KDB
905462 D02 when the path loss of the coupling network shown in Section 4.2 Configuration and
Peripherals is added to the noise floor.




                Date:9.JUN.2014 21:04:30



                                           Noise Floor of Spectrum Analyser




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TEST REPORT                                                      SERIAL NO: UL-RPT-RP10295122JD01M

VERSION 4.0                                                                ISSUE DATE: 31 JULY 2014



Appendix 4. Channel Loading
As required by Section 8.3. 3 f) of KDB 605642 D02, the following plot and calculations shows the
duty cycle of the channel used during testing.
Streaming representative file types as defined in Section 7.7 a) of KDB 605642 D02, were found
not to produce a high enough duty cycle of >17%, as required by 7.7 c), on a 40 MHz channel
bandwidth. This included lowest data rate with modulation coding scheme MCS0, maximum video
size (1080p) and the minimum video compression ratio during encoding. Therefore alternative
pseudo-random data transfer as per 7.7 b) was streamed to simulate data transfer. A suitable duty
cycle was obtained with the link limited to MCS0 and a data transfer of 2 Mbps.
The duty cycle was calculated over 200 milliseconds. This was captured on a spectrum analyser in
the time domain using a 0 Hz span and 32000 sweep points to ensure accuracy to 6.25 µs sample
size.




              Date:9.JUN.2014 13:34:42



The number of samples greater than -60 dBm was compared to the total number of samples to
calculate the duty cycle. The EUT and test router were found to be transmitting above this
threshold for 6166 of the 25834 seconds, resulting in a channel loading of 19.27 %, and hence
meeting the requirement of greater than 17 %.
                                         --- END OF REPORT ---




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Document Created: 2014-07-31 20:25:02
Document Modified: 2014-07-31 20:25:02

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