Test Report Rev C.

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Test Report

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FCC/ISED Test Report Client: Ainstein AI Inc. EUT: 2029 Becker Drive Bioscience & Technology Business Center, Lawrence, KS 66047 USA Product: UAC Radar Altimeter US-D1 Test Report No.: R20190604-21C Approved By: __________________ Nic S. Johnson, NCE Technical Manager iNARTE Certified EMC Engineer #EMC-003337-NE Date: 25 October 2019 Total Pages: 23 The Nebraska Center for Excellence in Electronics (NCEE) authorizes the above named company to reproduce this report provided it is reproduced in its entirety for use by the company’s employees only. Any use that a third party makes of this report, or any reliance on or decisions made based on it, are the responsibility of such third parties. NCEE accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report. This report applies only to the items tested.

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Revision Page Rev. No. Date Description Original 9/16/2019 Approved by – Njohnson Prepared by KVepuri/CFarrington A 10/9/2019 Corrected duty cycle calculation Added additional band edge measurements Includes NCEE Labs test report R20190604-21 and its amendment in full. -NJ B 10/23/2019 Corrected duty cycle correction factor on pages 12 – 14. Added note to Section 3.2.1 to explain what limits were used and how they were converted to dBmV/m. Includes NCEE Labs test report R20190604-21A and its amendment in full. -NJ C 10/25/2019 Removed all occupied bandwidth plots except for the one that was the largest. Includes NCEE Labs test report R20190604-21B and its amendment in full. -NJ The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 2 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Table of Contents 1 Summary of Test Results ..................................................................................................... 3 1.1 Emissions Test Results ................................................................................................. 3 2 EUT Description ................................................................................................................... 4 2.1 Equipment under Test (EUT) ......................................................................................... 4 2.2 Laboratory Description .................................................................................................. 4 2.3 EUT Setup..................................................................................................................... 4 3 Test Results ......................................................................................................................... 5 3.1 Radiated Emissions, Fundamental & Harmonics ........................................................... 5 3.2 Bandedges and Occupied Bandwidth ...........................................................................15 Annex A - Sample Calculation ....................................................................................................20 Annex B – Measurement Uncertainty .........................................................................................22 REPORT END ............................................................................................................................23 1 Summary of Test Results 1.1 Emissions Test Results The EUT has been tested according to the following specifications: (1) US Code of Federal Regulations, Title 47, Part 15 Testing was performance in accordance with the methods published in ANSI C63.10-2013 Table 1 - Emissions Test Results Emissions Tests Test Method and Limits Result Fundamental, Harmonic, FCC Part 15.249 Complies frequency tolerance and Band Edges The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 3 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI 2 EUT Description 2.1 Equipment under Test (EUT) Table 2 - Equipment under Test (EUT) EUT UAC Radar Altimeter US-D1 EUT Received 8/6/2019 EUT Tested 8/6/2019 - 8/21/2019 LAG2019070310 (Rx mode/sweep mode) LAG2019070333 & LAG2019070306 (Low channel) Serial No. LAG2019070317 (Mid channel) LAG2019070343 (High channel) Operating Band 24 GHz - 24.25 GHz Device Type Low-power transmitter 2.2 Laboratory Description All testing was performed at the following Facility: The Nebraska Center for Excellence in Electronics (NCEE Labs) 4740 Discovery Drive Lincoln, NE 68521 A2LA Certificate Number: 1953.01 FCC Accredited Test Site Designation No: US1060 Industry Canada Test Site Registration No: 4294A-1 NCC CAB Identification No: US0177 Environmental conditions varied slightly throughout the tests: Relative humidity of 32  4% Temperature of 22  3 Celsius 2.3 EUT Setup The EUT was powered by 5 VDC (Anker Power bank; Power core 5000 MN: A1109 SN: AACJQ90815118063 was used as source (This was provided by the manufacturer as a representative supply by connecting to a project board to simulate the drone battery)) unless specified and set to transmit continuously on the default frequency channel. Channel Frequency GHz Low 24.017 Mid 24.125 High 24.247 The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 4 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI 3 Test Results 3.1 Radiated Emissions, Fundamental & Harmonics Test: FCC Part 15.249 Test Result: Complies Date: 8/6/2019 - 9/11/2019 3.1.1 Test Description Emissions measurements were made using a 26 GHz spectrum analyzer with an external mixer and horn antenna. Measurements were taken at a distance of 1 meter. The analyzer was set to a resolution bandwidth of 10 MHz and a video bandwidth of 10 MHz for the fundamental measurement. The resolution bandwidth was set to 1 MHz and video bandwidth set to 1 MHz for the harmonic measurement. The results were compared against the limits published in FCC Part 15.245. 3.1.2 Test Results No radiated emissions measurements were found in excess of the limits. Test result data can be seen below. 3.1.3 Test Environment Testing was performed at the NCEE Labs Lincoln facility. Laboratory environmental conditions varied slightly throughout the test: Relative humidity of 33 ± 5% Temperature of 22 ±2o C 3.1.4 Test Setup For measurements from 24 – 100 GHz, RF absorber was not used. The antennas used we directional antennas and all measurements were performed line-of-sight. The measurements were performed at least 2 meters away from any other objects other than the non-conductive table and the test receiver. Reflections from the floor or any other surface were not a significant factor in the measurements. See Section 2.3 for further details. 3.1.5 Test Equipment Used Serial No. Manufacturer Model Description Last Cal. Calibration due A082918-1 SunAR RF Motion JB1 Bicon Antenna 15 Oct 2018 15 Oct 2020 6415 EMCO-ETS 3115 DRG Horn 26 Jan 2018 26 Jan 2020 2576 ETS 3116 Horn Antenna 31 Jan 2018 31 Jan 2020 100037 Rhode & Schwarz ESI26* EMI Test Receiver 30 Jan 2018 30 Jan 2020 MY59050109 Keysight N9038A MXE Signal Analyzer 23 Apr 2019 23 Apr 2021 8077 Pasternack PE13U1002 Mixer 28 Jan 2017 28 Jan 2022 32/2016 Pasternack PE9881-24 Horn Antenna CNR*** CNR*** 1823 Pasternack SMW22AC001-24F Mixer 13 Aug 2018 13 Aug 2020 Ncee1 Pasternack SH122-23 Horn Antenna CNR*** CNR*** 1618 Pasternack PE-W15CA001 WR-19 to WR-28 adapter 28 Jan 2017 28 Jan 2022 *Note: spectrum analyzer included a firmware upgrade and internal local oscillator output upgrade for measurements above 26.5 GHz. Rohde and Schwarz F/W version 4.32.**Calibration Not Required, internal verification***Calibration not required, standard gain horn antenna. All mixers and pre-amplimers were calibrated with associated cables. The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 5 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI 3.1.6 Test Pictures and/or Figures Figure 1 - Radiated Emissions Data Plot, 30M-1GHz, Receive mode Table 3 - Radiated Emissions Quasi-Peak Data, 30MHz – 24 GHz, Receive mode Frequency Level Limit Margin Height Angle Polarity MHz dBµV/m dBµV/m dB cm deg 66.240000 23.00 40.00 17.00 100 148 VERT 142.080000 15.77 43.50 27.70 396 35 VERT The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 6 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Figure 2 - Radiated Emissions Data Plot, 30M-1GHz, Low Channel Table 4 - Radiated Emissions Quasi-Peak Data, 30MHz – 24 GHz, Low Channel Frequency Level Limit Margin Height Angle Polarity MHz dBµV/m dBµV/m dB cm deg 66.240000 28.83 40.00 11.20 100 31 VERT 134.940000 23.80 43.50 19.70 115 256 VERT 225.000000 23.79 46.00 22.20 103 40 VERT 893.880000 32.01 46.00 14.00 318 328 HORI The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 7 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Figure 3 - Radiated Emissions Data Plot, 30M-1GHz, Mid Channel Table 5 - Radiated Emissions Quasi-Peak Data, 30MHz – 24 GHz, Mid Channel Frequency Level Limit Margin Height Angle Polarity MHz dBµV/m dBµV/m dB cm deg 60.120000 28.14 40.00 11.90 100 173 VERT 66.180000 27.84 40.00 12.20 99 0 VERT The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 8 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Figure 4 - Radiated Emissions Data Plot, 30M-1GHz, High Channel Table 6 - Radiated Emissions Quasi-Peak Data, 30MHz – 24 GHz, High Channel Frequency Level Limit Margin Height Angle Polarity MHz dBµV/m dBµV/m dB cm deg 60.120000 27.14 40.00 12.90 98 182 VERT 66.240000 29.30 40.00 10.70 101 34 VERT The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 9 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Table 7 - Fundamental and Harmonic Emissions Data Measurements made at 1m. Limits extrapolated to 1 meter using 20dB/dec Un- Corrected Corrected corrected Fundamental Harmonic AVG Frequency PK Field AVG Field Channel PK Field Limit Limit Margin (ƒ) Strength Strength Level Strength (AVG) (AVG) Level with DCCF Level GHz dBmV/m dBmV/m dBmV/m dBmV/m dBmV/m dB Low 24.017 19.711 65.72 43.02 57.50 - 13.83 Mid 24.125 20.683 66.69 43.99 57.50 - 12.86 High 24.247 17.192 63.20 40.5 57.50 - 16.35 Low 48.025 -19.97 21.29 -1.41 - 17.50 18.26 Mid 48.250 -19.88 21.38 -1.32 - 17.50 18.17 High 48.494 -20.84 20.42 -2.28 - 17.50 19.13 Low 72.042 -19.54 31.52 8.82 - 17.50 8.03 Mid 72.375 -18.87 32.19 9.49 - 17.50 7.36 High 72.741 -19.21 31.85 9.15 - 17.50 7.70 Un- Corrected corrected Fundamental Harmonic PK Frequency PK Field Channel PK Field Limit Limit Margin (ƒ) Strength Strength (PK) (PK) Level Level GHz dBmV/m dBmV/m dBmV/m dBmV/m dB Low 24.017 19.711 65.72 77.50 - 11.78 Mid 24.125 20.683 66.69 77.50 - 10.81 High 24.247 17.192 63.20 77.50 - 14.30 Low 48.025 -19.97 21.29 - 37.50 16.21 Mid 48.250 -19.88 21.38 - 37.50 16.12 High 48.494 -20.84 20.42 - 37.50 17.08 Low 72.042 -19.54 31.52 - 37.50 5.98 Mid 72.375 -18.87 32.19 - 37.50 5.31 High 72.741 -19.21 31.85 - 37.50 5.65 All measurements were made with peak detector unless noted. *Measurement was in the system noise floor See following page for limit, duty cycle correction and correction factors The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 10 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Duty cycle corrections: The transmitter 600 µs ON time and 8.2 ms period (see operation description, Section 3) duty cycle correction = -22.7 dB Limit calculations: Fundamental limit: 250 mV/m at 3 meters = 47.96 dBmV/m = 57.50 dBmV/m at 1 meter. Harmonic limit: 2.5 mV/m at 3 meters = 7.95 dBmV/m = 17.50 dBmV/m at 1 meter. Correction factors: 48 GHz: (41.26 dB total) Mixer 0.40 dB Antenna factor 40.86 dB/m (standard gain horn, gain = 23 dBi) 72 GHz: (51.06 dB) Mixer 7.0 dB WR-19 to WR-28 waveguide transition 0.55 dB Antenna factor 43.51 dB/m (standard gain horn, gain = 24 dBi) Correction Field strength calculations Corrected PK Measurement = Un-corrected PK field strength (dBmV/m) + correction factors total (dB) Corrected AVG Measurement = Un-corrected PK field strength (dBmV/m) + correction factors total (dB) – Duty cycle correction (dB) The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 11 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Figure 5 - Analyzer Measurement – Fundamental, Channel Low Uncorrected measurement as recorded on spectrum analyzer Level Measurement: 19.711 dBmV/m + 46.01 dB corrections – 22.7 dB duty cycle correction = 43.02 dBmV/m. Cable 0.50 dB Antenna 45.51 dB The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 12 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Figure 6 - Analyzer Measurement – Fundamental, Channel Mid Uncorrected measurement as recorded on spectrum analyzer Level Measurement: 20.683 dBmV/m + 46.01 dB corrections – 22.7 dB duty cycle correction = 43.99 dBmV/m. Cable 0.50 dB Antenna 45.51 dB The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 13 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Figure 7 - Analyzer Measurement – Fundamental, Channel High Uncorrected measurement as recorded on spectrum analyzer Level Measurement: 17.192 dBmV/m + 46.01 dB corrections – 22.7 dB duty cycle correction = 40.502 dBmV/m. Cable 0.50 dB Antenna 45.51 dB The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 14 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI 3.2 Bandedges and Occupied Bandwidth Test Method: ANSI C63.10-2013, Section(s) 6.10.5, 6.10.6, 6.9.2 3.2.1 Limits of bandedge measurements: For emissions outside of the allowed band of operation, the emission level needs to be 50dB under the maximum fundamental field strength. However, if the emissions fall within one of the restricted bands from 15.205 the field strength levels need to be under that of the limits in 15.209. The limit from FCC Part 15.209 for all frequencies above 960 MHz is 500 µV/m at 3m. 500 µV/m = 20log(500) = = 54 dBµV/m = 54 – 60 = -6 dBmV/m at 3m average Peak limit = average limit + 20 dB = 14 dBmV/m at 3m peak 3.2.2 Test procedures: The EUT was oriented as to produce the maximum emission levels. The resolution bandwidth was set to 100kHz (unrestricted), 1MHz (restricted) and the EMI receiver was used to scan from the bandedge to the fundamental frequency with a quasi-peak detector. The highest emissions level beyond the bandedge was measured and recorded. All band edge measurements were evaluated to the general limits in Part 15.209. The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 15 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Measurements were performed as radiated measurements in the same manner as Section 3.1 of this report. The bandwidth of the fundamental frequency was measured by spectrum analyzer with 100 kHz RBW and 300 kHz VBW. The occupied bandwidth was measured using the spectrum analyzers 99% occupied bandwidth setting. 3.2.3 Deviations from test standard: No deviation. 3.2.4 Test setup: All the measurements were done at 1m test distance. 3.2.5 EUT operating conditions: The EUT was powered by 5 VDC unless specified and set to transmit continuously on the lowest frequency channel, and the highest frequency channel. Test results: The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 16 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Band Edges Figure 8 – Lower Band Edge, 24.00 GHz Uncorrected measurement as recorded on spectrum analyzer, 5 cm test distance Low Band Edge Measurement at 24.25 GHz Peak level from Figure 8 = -7.84 dBmV Corrected Restricted Band Peak Level = -7.84 dBmV/m + 46.01 dB (corrections) = 38.17 dBmV/m < 49.56 dBmV/m [limit at 5cm = 20log(3/0.05)+14 dBmV/m] Average Level = peak level – 22.7 (dccf) = =15.47 dBmV/m < 29.56 dBmV/m [limit at 5cm = 20log(3/0.05)+(-4) dBmV/m] Corrections: Cable 0.50 dB Antenna 45.51 dB Measurements were performed at 5 cm to achieve required sensitivity without preamplifier saturation The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 17 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Figure 9 - Lower Band Edge, 24.00 GHz Uncorrected measurement as recorded on spectrum analyzer, 5 cm test distance High Band Edge Measurement at 24.25 GHz Peak level from Figure 9 = -4.68 dBmV Corrected Restricted Band Peak Level = -4.68 dBmV/m + 46.01 dB (corrections) = 41.33 dBmV/m < 49.56 dBmV/m [limit at 5cm = 20log(3/0.05)+14 dBmV/m] Average Level = peak level – 22.7 (dccf) = = 18.63 dBmV/m < 29.56 dBmV/m [limit at 5cm = 20log(3/0.05) + (-4) dBmV/m] Corrections: Cable 0.50 dB Antenna 45.51 dB Measurements were performed at 5 cm to achieve required sensitivity without preamplifier saturation The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 18 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Occupied Bandwidth Figure 10 – Occupied Bandwidth, High channel Uncorrected measurement as recorded on spectrum analyzer The occupied bandwidth of the highest channel was found to be the largest. The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 19 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Annex A - Sample Calculation Field Strength Calculation The field strength is calculated by adding the Antenna Factor and Cable Factor, and subtracting the Amplifier Gain (if any) from the measured reading. The basic equation with a sample calculation is as follows: FS = RA + AF – (-CF + AG) + AV where FS = Field Strength RA = Receiver Amplitude AF = Antenna Factor CF = Cable Attenuation Factor AG = Amplifier Gain AV = Averaging Factor (if applicable) Assume a receiver reading of 55 dBV is obtained. The Antenna Factor of 12 and a Cable Factor of 1.1 is added. The Amplifier Gain of 20 dB is subtracted, giving a field strength of 48.1 dBV/m. FS = 55 + 12 – (-1.1 + 20) + 0 = 48.1 dBV/m The 48.1 dBV/m value can be mathematically converted to its corresponding level in V/m. Level in V/m = Common Antilogarithm [(48.1 dBV/m)/20]= 254.1 V/m AV is calculated by the taking the 20*log(Ton/100) where Ton is the maximum transmission time in any 100ms window. The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 20 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI EIRP Calculations In cases where direct antenna port measurement is not possible or would be inaccurate, output power is measured in EIRP. The maximum field strength is measured at a specified distance and the EIRP is calculated using the following equation; EIRP (Watts) = [Field Strength (V/m) x antenna distance (m)]2 / [30 x Gain (numeric)] Power (watts) = 10^[Power (dBm)/10] x 1000 Field Strength (dBµV/m) = Field Strength (dBm) = 107 (for 50Ω measurement systems) Field Strength (V/m) = 10^[Field Strength (dBµV/m) / 20] / 10^6 Gain = 1 (numeric gain for isotropic radiator) Conversion from 3m field strength to EIRP (d=3): EIRP = (FS x d^2)/30 = FS [(d^2)/30] = FS [0.3} EIRP(dBm) = FS(dBµV/m) – 10(log 10^9)+ 10log[0.3] = -95.23 10log( 10^) is the conversion from micro to milli The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 21 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI Annex B – Measurement Uncertainty Where relevant, the following measurement uncertainty levels have been for tests performed in this test report: Test Frequency Range Uncertainty Value (dB) Radiated Emissions, 3m 30MHz - 1GHz 3.82 Radiated Emissions, 3m 1GHz - 18GHz 4.44 Emissions limits, conducted 150kHz – 18GHz ±3.30 dB Expanded uncertainty values are calculated to a confidence level of 95%. CISPR 16-4-2:2011 was used to calculate the above values. The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 22 of 23

0 Report Number: R20190604-21 Rev C Prepared for: Ainstein AI REPORT END The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 23 of 23


Document Created: 2019-10-25 14:54:51
Document Modified: 2019-10-25 14:54:51
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