R-TR581_FCCISED-DFS-4

FCC ID: C3K1867

Test Report

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FCCID_4453344

RADIO TEST REPORT For MODEL NO.: 1868 FCC ID: C3K1868 IC ID: 3048A-1868 Test Report No. R-TR581-FCCISED-DFS-4 Issue Date: September 13, 2019 FCC CFR47 Part 15 Subpart E Innovation, Science and Economic Development Canada RSS-247 Issue 2 Prepared by Microsoft EMC Laboratory 17760 NE 67th Ct, Redmond WA, 98052, U.S.A. 425-421-9799 dasalina@microsoft.com TESTING CERT #3472.01 Rev 2.0

FCC ID: C3K1868 IC ID: 3048A-1868 1 Record of Revisions Revision Date Section Page(s) Summary of Changes Author/Revised By: 1.0 08/22/2019 All All Version 1.0 Jems Pradhan 2.0 08/30/2019 Attestation 5 Test data leveraging statement Daniel Salinas updated 3.0 09/10/2019 4.3 8 Antenna gains value corrected Jems Pradhan 8.2 27 Aggregate control signals value added 4.0 09/13/2019 7.0 11 Added a statement on test method Jems Pradhan Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 2 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Table of Contents 1 Record of Revisions ............................................................................................................... 2 2 Deviations from Standards .................................................................................................... 6 3 Facilities and Accreditations .................................................................................................. 6 3.1 Test Facility .................................................................................................................... 6 3.2 Accreditations ................................................................................................................. 6 4 Product Description ............................................................................................................... 7 4.1 Test Configurations ........................................................................................................ 8 4.2 Environmental Conditions ............................................................................................... 8 4.3 Antenna Requirements ................................................................................................... 8 4.4 Equipment Modifications ................................................................................................ 8 4.5 Dates of Testing ............................................................................................................. 8 5 Test Results Summary .......................................................................................................... 9 6 Test Equipment List ............................................................................................................. 10 7 Test Method ......................................................................................................................... 11 7.1 Antenna port conducted measurements ....................................................................... 11 7.2 Test Setup Diagrams .................................................................................................... 11 7.3 Radar Waveform Verification ........................................................................................ 12 7.4 Channel Loading .......................................................................................................... 19 Test Method .......................................................................................................... 19 8 Test Results ......................................................................................................................... 22 8.1 Channel Move Time ..................................................................................................... 22 Test Requirement: ................................................................................................. 22 Test Method: ......................................................................................................... 22 Limits: .................................................................................................................... 22 Test Results: ......................................................................................................... 22 Test Data ............................................................................................................... 22 8.2 Channel Closing Transmission Time ............................................................................ 27 Test Requirement: ................................................................................................. 27 Test Method: ......................................................................................................... 27 Limits: .................................................................................................................... 27 Test Results: ......................................................................................................... 27 Test Data ............................................................................................................... 27 8.3 Non-Occupancy Period ................................................................................................ 30 Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 3 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Test Requirement: ................................................................................................. 30 Test Method: ......................................................................................................... 30 Limits: .................................................................................................................... 30 Test Results: ......................................................................................................... 30 Test Data: .............................................................................................................. 30 Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 4 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Test Report Attestation Microsoft Corporation Model: 1868 FCC ID: C3K1868 IC ID: 3048A-1868 Applicable Standards Specification Test Result FCC 47CFR Rule Parts 15.407 (DFS) Pass Innovation, Science and Economic Development Pass Canada RSS-247 Issue 2 (DFS) Microsoft EMC Laboratory attests that the product model identified in this report has been tested to and meets the requirements identified in the above standards. The test results in this report solely pertains to the specific sample tested, under the conditions and operating modes as provided by the customer. Per the customer, models 1867, 1868, and 1872 are electrically equivalent except, contain the same radio module, and have the same software drivers and settings with respect to this test. Therefore, the data and test results in this report can be leveraged for models 1867 and 1872 as well. This report shall not be used to claim product certification, approval, or endorsement by A2LA or any agency of any Government. Reproduction, duplication or publication of extracts from this test report is prohibited and requires prior written approval of Microsoft EMC Laboratory. This report replaces previously issued report R-TR581-FCCISED-DFS-3 issued 09/10/2019 Written By: Reviewed/ Issued By: Jems Pradhan Daniel Salinas Radio Test Engineer Radio Compliance Test Lead Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 5 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 2 Deviations from Standards None. 3 Facilities and Accreditations 3.1 Test Facility All test facilities used to collect the test data are located at Microsoft EMC Laboratory, 17760 NE 67th Ct, Redmond WA, 98052, USA 3.2 Accreditations The lab is established and follows procedures as outlined in IEC/ISO 17025 and A2LA accreditation requirements. A2LA Accredited Testing Certificate Number: 3472.01 FCC Registration Number: US1141 IC Site Registration Numbers: 3048A-3, 3048A-4 Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 6 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 4 Product Description Company Name: Microsoft Corporation Address: One Microsoft Way City, State, Zip: Redmond, WA 98052-6399 Customer Contact: Chaitrali Limaye Portable computing device with IEEE 802.11a/b/g/n/ac/ax Functional Description MIMO radio supporting 20/40/80/160 MHz bandwidths, of the EUT: Bluetooth 5.0. Model: 1868 FCC ID: C3K1868 IC ID: 3048A-1868 IEEE 802.11a/n/ac with 20MHz, 40MHz, 80MHz and Radio under test: 160MHz Signal Bandwidths Modulation(s): OFDM – BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM EUT Classification: UNII Client Device without radar detection RF Conducted port impedance: 50 Ω in the frequency range of operation Antenna Gain Measurement N/A – Measurements were performed using conducted test Verification: methods Transmit Power Control: The EUT does not implement TPC Wireless Bridge or Mesh The device does not implement bridge or mesh modes Capability: Power – Cycle Time: N/A. The EUT is a client device without radar detection The EUT does not detect or store information regarding Radar Waveform Information: radar waveforms Equipment Design State: Prototype/Production Equivalent (DV) Equipment Condition: Good Test Sample Details: RF Conducted Test Sample: SN 007323692857 Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 7 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 4.1 Test Configurations The device was setup in normal operation and connected wirelessly to an 802.11 access point. Iperf was used to generate continuous traffic to meet the channel loading conditions and allow for random pinging intervals and dynamically allocate the talk/listen ratio. Measurements were performed on antenna Chain 1. DFS Radar signals were injected into 5GHz Tx/Rx port of the Master device. 4.2 Environmental Conditions Ambient air temperature of the test site was within the range of 10 °C to 40 °C (50 °F to 104 °F) unless the EUT specified testing over a different temperature range. Humidity levels were in the range of 10% to 90% relative humidity. Testing conditions were within tolerance and any deviations required from the EUT are reported. 4.3 Antenna Requirements The antennas are internal, permanently attached and there are no provisions for connection to an external antenna. Antenna Gain Frequency Band Chain 0 Peak Gain (dBi) Chain 1 Peak Gain (dBi) (MHz) UNII Band 1- 5150 to 5250 3.6 2.2 UNII Band 2a – 5250 to 5350 5.2 3.5 UNII Band 2c – 5470 to 5725 6.4 4.7 UNII Band 3 – 5725 to 5850 7.8 4.5 Since the EUT supports simultaneous transmissions signals which are completely uncorrelated in regard to transmit power, the combined gain is calculated using the following formula as specified in KDB 662911 D01 Multiple Transmitter Output v02r01: Directional gain = 10log [(10G1 /10 + 10G2 /10 + … + 10GN /10)/NANT] dBi Combined Directional Antenna Gain Frequency Band Combined Directional Gain (MHz) (dBi) UNII Band 1- 5150 to 5250 3.0 UNII Band 2a – 5250 to 5350 4.4 UNII Band 2c – 5470 to 5725 5.6 UNII Band 3 – 5725 to 5850 6.5 4.4 Equipment Modifications No modifications were made during testing. 4.5 Dates of Testing Testing was performed from August 16rd – August 20th 2019 & September 9th 2019. Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 8 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 5 Test Results Summary FCC CFR 47/ Limit Test Test Description ISED Rule Part Result In-Service Monitoring 15.407(h)(2)(iv) Monitor Co-channel N/A* RSS-247 [6.3] Radar Channel Availability Check 15.407 (h)(2)(ii) 60s Detection N/A* RSS-247 [6.3] Channel Move Time 15.407 (h)(2)(iii) 10s Pass RSS-247 [6.3] Channel Closing Transmission 15.407 (h)(2)(iii) 200ms + Aggregate Pass Time RSS-247 [6.3] 60ms over remaining 10s period Non-Occupancy Period 15.407 (h)(2)(iv) 30 minutes Pass RSS-247 [6.3] *Note: The EUT is a Client device without radar detection. Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 9 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 6 Test Equipment List Asset Calibration Manufacturer Description Model # FCC ID # Due Rohde & Analyzer FSV40 RF-245 N/A 04/10/2020 Schwarz Rohde & Vector Signal SMBV100A RF-288 N/A 04/11/2020 Schwarz Generator Q87- Linksys Access Point WRT3200ACM N/A N/A WRT3200ACM L-Com RF-Combiner SC5802N RF-048 N/A N/A* EMC- N/A N/A* XMA RF-Combiner 3082-6256-10 109 EMC- N/A 11/14/2019 Madge Tech Temp Meter PRHTemp2000 679 L-Com Attenuator SC5802N RF-049 N/A N/A* Pasternack Attenuator PE7087-10 RF-862 N/A N/A* Pasternack Attenuator PE7087-10 RF-861 N/A N/A* Pasternack Filter PE87FL1015 RF-649 N/A N/A* Pasternack Cable PE304-48 RF-665 N/A N/A* Rosenberger Cable L72-449-1830 RF-111 N/A N/A* ARL72-450- EMC- N/A N/A* Agrosy Cable 1830 316 Micro-coax Cable Utiflex RF-867 N/A N/A* Huber & N/A N/A* Cable W49.30 RF-086 Suhner Mouser Cable CabS02 RF-933 N/A N/A* Note*: Equipment was within calibration during test. Note: Equipment with Calibration Due Date of “N/A*” are functionally verified or characterized before test. Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 10 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 7 Test Method 7.1 Antenna port conducted measurements Antenna port conducted measurements were performed on a bench-top setup consisting of a spectrum analyzer, Radar Signal Generator, splitters/combiners (as necessary), attenuators, and pre-characterized RF cables. The correction factors between the EUT, support equipment, radar test generator and the spectrum analyzer are added in the test system. Attenuation values were adjusted as necessary to ensure Radar, EUT and Access point signals are clearly distinguishable. Conducted tests were performed and a signal level of -63dBm/3MHz or lower was injected into the Radar Detection Device (RDD) Master Device as stated by the KDB. The antenna gain of the EUT is not critical for performing the test as this device is not the RDD. The antenna gain has no impact on the conducted measurements of the EUT and test results will be identical when tested with a different antenna assembly gain. 7.2 Test Setup Diagrams Figure 1. Test Setup for Antenna Port Conducted Measurements Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 11 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 7.3 Radar Waveform Verification Spectrum Signal 35 dB Att. 10 dB Att. Analyzer Generator Two Way Two Way Splitter Splitter 50 Ω 50 Ω Termination Termination Figure 2. Test Setup for Conducted Measurement Radar Verification Required Min. Max Antenna Radar Device Output Output EIRP Device Gain Detection Type Power Power (dBm) (dBi) Threshold (dBm) (dBm) Level (dBm) Master Linksys WRT3200 12.10 23.97 5.1 29.07 -64 ACM Client Microsoft 11.80 19.55 4.85 24.4 N/A Model 1868 DFS Measurement Radar Type Channel Move Time 0 Channel Closing Transmission Time 0 Non-Occupancy Period 0 Rader Frequency Level Pulse Pulse width Pulse Repetition Type (MHz) (dBm) count (μs) Interval (ms) 0 5270 -63.70 18 1.026 1.428 0 5670 -63.56 18 1.028 1.428 0 5570 -63.93 18 1.024 1.428 0 5530 -64.25 18 1.024 1.428 Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 12 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 3. Radar Burst Level at -63dBm: Radar Type 0 (5700MHz, 20MHz BW) Figure 4. Radar Pulse width: Radar Type 0 (5700 MHz, 20MHz BW) Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 13 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 5. Radar Pulse Repetition Interval: Radar Type 0 (5700MHz, 20MHz BW) Figure 6. Radar Burst Level at -63dBm: Radar Type 0 (5630MHz, 40MHz BW) Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 14 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 7. Radar Pulse width: Radar Type 0 (5630MHz, 40MHz BW) Figure 8. Radar Pulse Repetition Interval: Radar Type 0 (5630MHz, 40MHz BW) Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 15 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 9. Radar Burst Level at -63dBm: Radar Type 0 (5530MHz, 80MHz BW) Figure 10. Radar Pulse width: Radar Type 0 (5530MHz, 80 MHz BW) Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 16 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 11. Radar Pulse Repetition Interval: Radar Type 0 (5530MHz, 80MHz BW) Figure 12. Radar Burst Level at -63dBm: Radar Type 0 (5570MHz, 160MHz BW) Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 17 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 13. Radar Pulse width: Radar Type 0 (5570MHz, 160MHz BW) Figure 14. Radar Pulse Repetition Interval: Radar Type 0 (5570MHz, 160MHz BW) Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 18 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 7.4 Channel Loading Test Method Channel Loading measurements were taken with a spectrum analyzer. CSV files were captured, and Channel Loading was calculated using that measured data. Channel Loading was measured and verified to be > 17%. Channel Loading is calculated using the following formula: 𝑂𝑛 π‘‡π‘–π‘šπ‘’ πΆβ„Žπ‘Žπ‘›π‘›π‘’π‘™ πΏπ‘œπ‘Žπ‘‘π‘–π‘›π‘” % 100 𝑂𝑛 π‘‡π‘–π‘šπ‘’ 𝑂𝑓𝑓 π‘‡π‘–π‘šπ‘’ Frequency Signal Total On Time On Time + Off Channel (MHz) Bandwidth (ms) Time (ms) Loading (MHz) (%) 5700 20 34.71 100 34.71 5630 40 243.27 500 48.65 5530 80 61.59 100 61.59 5570 160 19.39 100 19.39 Figure 15. Channel Loading (5700MHz, 20MHz BW) Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 19 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 16. Channel Loading (5630MHz, 40MHz BW) Figure 17. Channel Loading (5530MHz, 80MHz BW) Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 20 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 18. Channel Loading (5570MHz, 160 MHz BW) Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 21 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 8 Test Results 8.1 Channel Move Time Test Requirement: FCC CFR 47 Rule Part 15.407 (h)(2)(iv) ISED Canada RSS-247 [6.3] Test Method: Measurements were performed according to the procedures defined in KDB 905462 D02 UNII DFS Compliance Procedures New Rules v02. Limits: After a radar signal is detected, the device shall cease all transmissions on the operating channel within 10 seconds. Test Results: Pass. The EUT ceased transmission on the channel within 200 ms and there was less than an aggregate of 60ms transmission time in a 10s period. Test Data 8.1.5.1 Channel Move Time Frequency Signal Channel Move Time Limit (s) Result (MHz) Bandwidth (s) (MHz) 5700 20 2.04 10 Pass 5630 40 2.09 10 Pass 5530 80 7.85 10 Pass 5570 160 2.08 10 Pass Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 22 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 19. DFS Radar Detection Plot 5700 MHz Figure 20. Channel Move Time 5700 MHz Figure 20 is a zoomed plot of Figure 19 to show the Channel Move Time for Channel 5700MHz. Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 23 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 21. Channel Move Time 5630 MHz Figure 22. DFS Radar Detection Plot 5630 MHz Figure 22 is a zoomed plot of Figure 21 which shows the Channel Move Time for 5630MHz. Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 24 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 23. Channel Move Time 5530 MHz Figure 24. DFS Radar Detection Plot 5530 MHz Figure 24 is a zoomed plot of Figure 23 which shows the Channel Move Time for 5530MHz. Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 25 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 25. Channel Move Time 5570 MHz, 160 MHz Bandwidth Figure 26. DFS Radar Detection Plot 5570 MHz, 160MHz Bandwidth Figure 26 is a zoomed plot of Figure 25 which shows the Channel Move Time for 5570MHz. Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 26 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 8.2 Channel Closing Transmission Time Test Requirement: FCC CFR 47 Rule Part 15.407 (h)(2)(iii) ISED Canada RSS-247 [6.3] Test Method: Measurements were performed according to the procedures defined in KDB 905462 D02 UNII DFS Compliance Procedures New Rules v02. Limits: After the radar burst has been applied, the EUT shall cease normal transmission on the channel within 200 ms starting at the beginning of the channel move time. Control signaling required to facilitate a channel move (an aggregate of 60 ms) over the remaining 10-second period of the channel move time is permissible. Test Results: Pass. The EUT ceased transmission on the channel within the allotted time. Test Data Channel Closing Total Aggregate Transmission Channel Carrier Channel Control Time Limit + Closing Frequency Bandwidth Signaling Aggregate Result Transmission (MHz) (MHz) Time after Control Time 200ms Signaling Time (ms) Limit (ms) 5700 20 76.51 9.00 200 +60 Pass 5630 40 40.50 9.09 200 +60 Pass 5530 80 51.50 45.50 200 +60 Pass 5570 160 68.50 31.50 200 +60 Pass Note: Total Channel Closing Transmission time reported above includes aggregate control signals. Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 27 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 27. Channel Closing Transmission Time (5700MHz), 20MHz Bandwidth Figure 27 is a zoomed plot of Figure 19 which shows the Channel Closing Transmission Time and transmission signals from the EUT which is accounted for calculating the Channel Closing Transmission Time. Figure 28. Channel Closing Transmission Time Control Signals (5630MHz), 40MHz Bandwidth Figure 28 is a zoomed plot of Figure 21 which shows the Channel Closing Transmission Time and transmission signals from the Access Point which is accounted for calculating the Channel Closing Transmission Time. Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 28 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 Figure 29. Channel Closing Transmission Time (5530 MHz), 80MHz Bandwidth Figure 29 is a zoomed plot of Figure 23 which shows the Channel Closing Transmission Time and transmission signals from the EUT which is accounted for calculating the Channel Closing Transmission Time. Figure 30. Channel Closing Transmission Time (5570 MHz), 160MHz Bandwidth Figure 30 is a zoomed plot of Figure 25 which shows the Channel Closing Transmission Time and transmission signals from the EUT which is accounted for calculating the Channel Closing Transmission Time. Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 29 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 8.3 Non-Occupancy Period Test Requirement: FCC CFR 47 Rule Part 15.407 (h)(2)(iv) ISED Canada RSS-247 [6.3] Test Method: Measurements were performed according to the procedures defined in KDB 905462 D02 UNII DFS Compliance Procedures New Rules v02. Limits: A channel that has been flagged as containing a radar system, either by a channel availability check or in-service monitoring, is subject to a non-occupancy period of at least 30 minutes. The non-occupancy period starts at the time when the radar system is detected. Test Results: Pass. After radar was detected by the master device, the EUT did not transmit on the tested channel for at least 30 minutes. Test Data: Plot shown for 2000 second sweep time. Injection of RADAR Figure 31. 30 Minute Non-Occupancy Period (5670 MHz) Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 30 of 31 Microsoft EMC Laboratory

FCC ID: C3K1868 IC ID: 3048A-1868 End of Report Report#: R-TR581-FCCISED-DFS-4 Issued: September 13, 2019 Page 31 of 31 Microsoft EMC Laboratory


Document Created: 2019-10-02 14:34:49
Document Modified: 2019-10-02 14:34:49
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