Test Report DFS

FCC ID: SS4EF401

Test Report

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FCCID_3951060

TEST REPORT DT&C Co., Ltd. m Dt &‘ 42, Yurim—ro, 154Beon—gil, Cheoin—gu, Yongin—si, Gyeonggi—do, Korea, 17042 Tel : 031—321—2664, Fax : 031—321—1664 1. Report No : DRTFCC1807—0181 2. Customer * Name : BLUEBIRD INC. * Address : (Dogok—dong, SEl Tower 13,14) 39, Eonjuro30—gil, Gangnam—gu, Seoul, South Korea 3. Use of Report : FCC Original Grant 4. Product Name / Model Name : Enterprise Full Touch Handheld Computer / EF401 FCC ID : SS4EF401 5. Test Method Used : KDB905462 DO2v02 , KDB905462 DO3v1r02 Test Specification : FCC Part 15.407 6. Date of Test : 2018.07.17 ~ 2018.07.18 7. Testing Environment : See appended test report. 8. Test Result : Refer to the attached test result. Tested by Reviewed by Affirmation M’ Name : Jaejin Lee t Name : GeunKi Son The test results presented in this test report are limited only to the sample supplied by applicant and the use of this test report is inhibited other than its purpose. This test report shall not be reproduced except in full, without the written approval of DT&C Co., Ltd. 2018 . 07 . 24 . DT&C Co., Ltd. If this report is required to confirmation of authenticity, please contact to report@dtnc.net TRF—RF—228(04)170516 Prohibits the copying and re—issue of this report without DT&C approval. Pages: 1 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 Test Report Version Test Report No. Date Description DRTFCC1807-0181 Jul. 24, 2018 Initial issue TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 2 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 Table of Contents 1. GENERAL INFORMATIONEUT DESCRIPTION ........................ 4 1.1. EUT Description .................................................................... 4 1.2. Auxiliary equipment ............................................................... 4 1.3. Testing environment .............................................................. 4 2. DYNAMIC FREQUENCY SELECTION TEST DESCRIPTION ... 5 2.1. Applicability of DFS requirements prior to use of a channel ... 5 2.2. Applicability of DFS requirements during normal operation ... 5 2.3. Requirements of client devices .............................................. 6 2.4. DFS response requirement values ........................................ 7 2.5. DFS detection thresholds ...................................................... 7 2.6. Radar test waveforms ........................................................... 8 3. Test procedure .......................................................................... 9 3.1. Setup for Client with injection at the Master........................... 9 3.2. Spectrum analyzer setting parameter .................................... 9 3.3. Conducted test procedure ..................................................... 9 4. SUMMARY OF TESTS ............................................................. 10 5. LIST OF EQUIPMENTS ............................................................11 6. TEST RESULTS ....................................................................... 12 6.1. Move time and aggregate time ............................................ 12 6.1.1. U-NII-2A : 802.11n(HT40), 5310 MHz .............................................. 12 6.1.2. U-NII-2C : 802.11n(HT40), 5510 MHz .............................................. 12 6.2. Non-occupancy period ........................................................ 13 6.2.1. U-NII-2A : 802.11n(HT40), 5310 MHz .............................................. 13 6.2.2. U-NII-2C : 802.11n(HT40), 5510 MHz .............................................. 13 APPENDIX I ................................................................................. 14 TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 3 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 1. GENERAL INFORMATIONEUT DESCRIPTION 1.1. EUT Description FCC equipment class Unlicensed National Information Infrastructure (UNII) Product Enterprise Full Touch Handheld Computer Model name EF401 Add model name NA EUT capabilities DFS Power supply DC 3.8 V Test condition Conducted Radiated Channel bandwidth 802.11a/n/ac: 20 MHz 802.11n/ac: 40 MHz 802.11ac: 80 MHz U-NII 2A(5250 ~ 5350 MHz) U-NII 2C(5470 ~ 5725 MHz) ▪ 802.11a/n(HT20)/ac(VHT20): ▪ 802.11a/n(HT20)/ac(VHT20): Frequency Range 5260 ~ 5320 MHz 5500 ~ 5580, 5660 ~ 5700 MHz ▪ 802.11n(HT40)/ac(VHT40): ▪ 802.11n(HT40)/ac(VHT40): 5270 ~ 5310 MHz 5510 ~ 5550, 5670 MHz ▪ 802.11ac(VHT80) ▪ 802.11ac(VHT80): 5290 MHz 5530 MHz Modulation type OFDM Master mode Operational mode Client mode without radar detection Client mode with radar detection Antenna type: PIFA Antenna Antenna specification U-NII-2A 0.40 dBi Antenna gain U-NII-2C 1.46 dBi Note1: The above EUT information was declared by the manufacturer. Note2: Refer to UNII report 1.2. Auxiliary equipment Equipment Model No. Serial No. Manufacturer Note Access Point (Master) DIR-868L R3X81E6000093 D-Link FCCID: RRK2012060056-1 1.3. Testing environment Ambient Condition ▪ Temperature 23 oC ~ 24 oC ▪ Relative Humidity 44 % ~ 46 % TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 4 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 2. DYNAMIC FREQUENCY SELECTION TEST DESCRIPTION 2.1. Applicability of DFS requirements prior to use of a channel Operational mode Requirement Client without Client with radar Master 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 U-NII Detection Bandwidth Yes Not required Yes 2.2. Applicability of DFS requirements during normal operation Operational mode Requirement Master 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 TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 5 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 Operational mode Additional requirements for devices Master or client with Client without radar with multiple bandwidth modes radar detection detection U-NII Detection Bandwidth and Statistical All BW modes must be Not required Performance Check tested Channel Move Time and Channel Closing Test using widest BW mode Test using the widest BW 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 each of the bonded 20 MHz channels and the channel center frequency. The EUT was tested according to the following specification: 905462 D02 UNII DFS Compliance Procedure New Rules v02 905462 D03 UNII Client Without Radar Detection New Rules v01r02 2.3. Requirements of client devices a) A Client Device will not transmit before having received appropriate control signals from a Master Device. b) A Client Device will stop all its transmissions whenever instructed by a Master Device to which it is associated and will meet the Channel Move Time and Channel Closing Transmission Time requirements. The Client Device will not resume any transmissions until it has again received control signals from a Master Device. c) If a Client Device is performing In-Service Monitoring and detects a Radar Waveform above the DFS Detection Threshold, it will inform the Master Device. This is equivalent to the Master Device detecting the Radar Waveform and d) through f) of section 5.1.1 apply. d) Irrespective of Client Device or Master Device detection the Channel Move Time and Channel Closing Transmission Time requirements remain the same. e) The client test frequency must be monitored to ensure no transmission of any type has occurred for 30 minutes. Note: If the client moves with the master, the device is considered compliant if nothing appears in the client non- occupancy period test. For devices that shut down (rather than moving channels), no beacons should appear. TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 6 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 2.4. DFS response requirement values Parameter Value Non-occupancy period Minimum 30 minutes Channel availability check time 60 seconds 10 seconds Channel move time See Note 1. 200 milliseconds + an aggregate of 60 milliseconds over Channel closing transmission time remaining 10 second period. See Notes 1 and 2. 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.. 2.5. DFS detection thresholds Below provides the DFS Detection Thresholds for Master Devices as well as Client Devices incorporating In-Service Monitoring. Value Maximum Transmit Power (See Notes 1, 2, and 3) EIRP ≥ 200 milliwatt -64 dBm EIRP < 200 milliwatt and -62 dBm power spectral density < 10 dBm/MHz EIRP < 200 milliwatt that do not meet the power spectral density -64 dBm requirement 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 1 dB 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. Note3: EIRP is based on the highest antenna gain. For MIMO devices refer to KDB Publication 662911 D01. TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 7 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 2.6. Radar test waveforms Minimum Minimum Pulse Radar PRI percentage of number width Number of pulses type (μsec) successful of (μsec) detection trials 0 1 1428 18 See Note 1 See Note 1 Test A: 15 unique PRI values randomly selected 1 19 ∙ 106 Roundup �� �∙� �� from the list of 23 PRI 360 𝑃𝑃𝑃𝑃𝑃𝑃𝜇𝜇𝜇𝜇𝜇𝜇𝜇𝜇 values in section 2.6.2. Test B: 15 unique PRI 1 1 values randomly selected 60% 30 within the range of 518- 3066 μsec, with a minimum increment of 1 μsec, excluding PRI values selected in Test A 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: As the EUT is a Client Device with no Radar Detection only one type radar pulse is required for the testing. Radar Pulse type 0 was used in the evaluation of the Client device for the purpose of measuring the Channel Move Time and the Channel Closing Transmission Time. Note 2: This report was applied Short Pulse Radar Type 0. TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 8 / 15

m Dt & C Report No.: DRTFCC1807—0181 FCC ID: SS4EF401 3. Test procedure 3.1. Setup for Client with injection at the Master The setup method is shown below diagram. The method according to the 905462 DO2 UNIl DFS Compliance Procedure New Rules vO2 — section 7.2 Redar Test 0 Signal Generator Master enc 2Way 2Way ——E=— e Spiter Spitted Combiner [— o O Spectum UUT Analyzer (Client) fwin 10 dBintomal Atleruaton} 3.2. Spectrum analyzer setting parameter The seffing parameter is shown below and it according to the 905462 D02 UNII DFS Compliance Procedure New Rules vC2 — section 7.5 1) RBW VBW 2 3MHz 2) Detector = Peak 3) Span = zero span 4) Sweep time 2 12s 3.3. Conducted test procedure 1 One frequency will be chosen from the Operating Channels of the UUT within the 5250—5350 MHz or 5470—5725 MHz bands. 2) The Client Device (EUT) is set up the above diagram and communications between the Master device and the Client is established. Stream the channel loading test file from the Master Deviceto the Client Device on the test Channel for the entire period of the test. (The MPEG file specified by the FCC ("6 i4 Magic Hours‘)) An adcitional 1 dB is added to the radar test signal to ensureit is at or above the DFS Detection Threshold, accounting for equipment variations/errors. Observe the transmissions of the UUT at the end of the Burst on the Operating Channelfor duration greater than 12 seconds for Radar Type 0 to ensure detection occurs. After theinitial radar burst the channelis monitored for 30 minutes to ensure no fransmissions or beacons occur. A second monitoring setup is used to verity that the Master and Client have both moved to different channels. T A—ANzzSOT10016 Prohiois the copying and re—ssus of this report wihout DT&G approval Pages: 97 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 4. SUMMARY OF TESTS Parameter Limit Status Note 1 C Channel move time 10 seconds Note 2 200ms + aggregate of 60ms over C Channel closing transmission time Note 2, 3 remaining 10 second period Non-occupancy period 30 minutes C Note 1: C=Comply NC=Not Comply NT=Not Tested NA=Not Applicable Note 2: 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 3: 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. TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 10 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 5. LIST OF EQUIPMENTS Cal.Date Next.Cal.Date Type Manufacturer Model (yy/mm/dd) (yy/mm/dd) S/N Spectrum Analyzer Agilent Technologies N9020A 17/12/26 18/12/26 MY50200816 Multimeter FLUKE 17B 17/12/26 18/12/26 26030065WS DFS Bridge System DTNC DFS-01 18/07/06 19/07/06 T001 Vector Signal Generator Rohde Schwarz SMBV100A 17/12/27 18/12/27 255571 Thermohygrometer BODYCOM BJ5478 18/01/03 19/01/03 1209 PXIS-2670(G) ADLINK 3025C 18/07/04 19/07/04 302581/834 PXIS-2670(G) ADLINK 3035C 18/07/04 19/07/04 303581/927 Cable Infinet CABLE 18/01/10 19/01/10 RF-40 Cable Infinet CABLE 18/01/10 19/01/10 RF-44 Cable Infinet CABLE 18/01/10 19/01/10 RF-45 Cable Infinet CABLE 18/01/10 19/01/10 RF-51 Cable Infinet CABLE 18/01/10 19/01/10 RF-52 Note1: The cable is not a regular calibration item, so it has been calibrated by DT & C itself. TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 11 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 6. TEST RESULTS 6.1. Move time and aggregate time 6.1.1. U-NII-2A : 802.11n(HT40), 5310 MHz 6.1.2. U-NII-2C : 802.11n(HT40), 5510 MHz TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 12 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 6.2. Non-occupancy period 6.2.1. U-NII-2A : 802.11n(HT40), 5310 MHz 6.2.2. U-NII-2C : 802.11n(HT40), 5510 MHz TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 13 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 APPENDIX I Channel loading U-NII-2A : 802.11n(HT40), 5310 MHz Timing plots: A minimum channel loading of approximately 17% or greater - Spectrum Analyzer setting 1) Span: Zero 2) Sweep points: 40001 Calculation: Channel loading = (Channel loading sweep points / Total sweep points) x 100 = (23918 / 40001) x 100 = 59.79 % Note: The Channel loading sweep points were extracted from the spectrum and calculated. TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 14 / 15

Report No.: DRTFCC1807-0181 FCC ID: SS4EF401 Channel loading U-NII-2C : 802.11n(HT40), 5510 MHz Timing plots: A minimum channel loading of approximately 17% or greater - Spectrum Analyzer setting 1) Span: Zero 2) Sweep points: 40001 Calculation: Channel loading = (Channel loading sweep points / Total sweep points) x 100 = (27068 / 40001) x 100 = 67.67 % Note: The Channel loading sweep points were extracted from the spectrum and calculated. TRF-RF-228(04)170516 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 15 / 15


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Document Modified: 2019-09-12 11:20:35
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