SS4HF550Enterprise-Value Full Touch Handheld Computer

BLUEBIRD INC. 3F, 115, Irwon-ro, Gangnam-gu, Seoul, South Korea Date: 11/19/2020 FCC ID: SS4HF550 Attestation Letter To Whom It may Concern: This device is integrated an approval module.( FCC ID: XMR201808EC25AF) When the authorized module is built into the final product, there are no changes in the hardware. ie, the transm itter module itself has not changed. -The LTE Band 14 is disabled via software. The modular test report is submitted to represent the compliance of FCC Part 22/24/27 conducted test item of this device. Sincerely, Yongsik Jang QA Senior Manager

BLUEBIRD INC. 3F, 115, Irwon-ro, Gangnam-gu, Seoul, South Korea Date: Nov 19, 2020 Timco Engineering, Inc. 849 N.W. State Road 45 P.O. Box 370 Newberry, Florida 32669 USA Letter of Authorization We, the undersigned, hereby authorize Geunki Son of DT&C Co., Ltd. to act on our behalf in all manners relating to application for equipment authorization for FCC ID: SS4HF550 including signing of all documents relating to these matters. Any and all acts carried out by Geunki Son of DT&C Co., Ltd. on our behalf shall have the same affect as acts of our own. This authorization is valid until further written notice from BLUEBIRD INC. “I, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a).” Sincerely, Yongsik Jang QA Senior Manager

BLUEBIRD INC. 3F, 115, Irwon-ro, Gangnam-gu, Seoul, South Korea Date: Nov 19, 2020 Timco Engineering, Inc. 849 N.W. State Road 45 P.O. Box 370 Newberry, Florida 32669 USA RE: Request of Confidentiality for FCC ID: SS4HF550 To Whom It may Concern: Pursuant to Sections 0.457 and 0.459 of the Commission`s Rules(CFR 47), and Section 552 (b) (4) of the Freedom of Information Act, BLUEBIRD INC. hereby requests confidentiality and treatment of certain information accompanying this application. The materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. We are also hereby request Short-Term Confidentiality for 180 days after the grant as outlined in Public Notice DA 04-1705. This provision will give BLUEBIRD INC. temporary confidentiality of commercially sensitive information prior to product release. The requested permanent and Short-Term Confidential exhibits are listed as follows: PERMANENT & SHORT-TERM CONFIDENTIAL LIST Exhibit Description PERMANENT 1 Block Diagram 2 Schematics 3 Part Lists 4 Operation Description 5 Tune up Procedure SHORT-TERM 6 Internal Photos 7 External Photos 8 Test-Setup Photos 9 User Manual The Applicant understands that pursuant to Rule 0.457, disclosure of this application and all accompanying documentations, where applicable, will not be public before the date of the Grant for this application. Sincerely, Yongsik Jang QA Senior Manager

FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 1 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 2 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 3 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 4 <PORT>

FCC ID : SS4HF550 Copy right Ⓒ 2020, DT&C Co., Ltd. SAMPLE LABEL & LOCA TION LABELLING REQUIREMENTS The Label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time of purchase. -The package includes the device, battery, battery cover packed individually. This allows the users to identify where the FCC ID is located. <Label location> <Sample Label> -The FCC label shown is representative of the label that will appear on the radio when in production. Other information may also be included on this label.

FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 1 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 2 <NFC Antenna> FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 3 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 4 <Main Antenna> <Main Antenna> FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 5 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 6 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 7 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 8 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 09 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 10 FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 11 <Wifi Antenna> FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 12 <Wifi Antenna> <RX Antenna> FCC ID : SS4HF550 Copyright Ⓒ 2020, DT&C Co., Ltd. View 13 <RX Antenna>

Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 Date of issue: Nov. 23, 2020 Copyright Ⓒ 2020, DT&C Co., Ltd. SAR Plots  Verification Plots  SAR Test Plots DT&C Co., Ltd. DUT: Dipole 600 MHz; Type: D600V3; Serial: D600V3 - SN:1002 Communication System: UID 0, CW (0); Frequency: 600 MHz; Duty Cycle: 1:1 Medium parameters used: f = 600 MHz; σ = 0.866 S/m; ε r = 43.02; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY5 Configuration: Probe: ET3DV6R - SN1703; ConvF(7.1, 7.1, 7.1); Calibrated: 7/31/2020 Electronics: DAE4 Sn1335 Sensor-Surface: 4mm (Mechanical Surface Detection) Phantom: SAM with CRP v5.0; Type: QD000P40CD; Serial: TP:1837 Measurement SW: DASY52, Version 52.10 (3); SEMCAD X Version 14.6.13 (7474) Test Date: 2020-10-30; Ambient Temp: 21.8; Tissue Temp: 21.5 600 MHz System Verification (250 mW) Area Scan (7x18x1): Measurement grid: dx=15mm, dy=15mm Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Power Drift = -0.00 dB Peak SAR (extrapolated) = 2.55 W/kg SAR(1 g) = 1.63 W/kg; SAR(10 g) = 1.08 W/kg 0 dB = 1.74 W/kg DT&C Co., Ltd. DUT: Dipole 750 MHz; Type: D750V3; Serial: D750V3 - SN:1049 Communication System: UID 0, CW (0); Frequency: 750 MHz; Duty Cycle: 1:1 Medium parameters used: f = 750 MHz; σ = 0.909 S/m; ε r = 42.922; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY5 Configuration: Probe: ES3DV3 - SN3328; ConvF(6.34, 6.34, 6.34); Calibrated: 3/25/2020 Electronics: DAE4 Sn1335 Sensor-Surface: 3mm (Mechanical Surface Detection) Phantom: SAM with CRP v5.0; Type: QD000P40CD; Serial: TP:1837 Measurement SW: DASY52, Version 52.10 (3); SEMCAD X Version 14.6.13 (7474) Test Date: 2020-10-29; Ambient Temp: 21.8; Tissue Temp: 21.7 750 MHz System Verification (250 mW) Area Scan (5x14x1): Measurement grid: dx=15mm, dy=15mm Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Power Drift = 0.04 dB Peak SAR (extrapolated) = 2.92 W/kg SAR(1 g) = 2.01 W/kg; SAR(10 g) = 1.33 W/kg 0 dB = 1.73 W/kg DT&C Co., Ltd. DUT: Dipole 835 MHz; Type: D835V2; Serial: D835V2 - SN:4d159 Communication System: UID 0, CW (0); Frequency: 835 MHz; Duty Cycle: 1:1 Medium parameters used: f = 835 MHz; σ = 0.908 S/m; ε r = 42.687; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY5 Configuration: Probe: ES3DV3 - SN3328; ConvF(6.19, 6.19, 6.19); Calibrated: 3/25/2020 Electronics: DAE4 Sn1335 Sensor-Surface: 3mm (Mechanical Surface Detection) Phantom: SAM with CRP v5.0; Type: QD000P40CD; Serial: TP:1837 Measurement SW: DASY52, Version 52.10 (3); SEMCAD X Version 14.6.13 (7474) Test Date: 2020-10-27; Ambient Temp: 20.9; Tissue Temp: 20.8 835 MHz System Verification (250 mW) Area Scan (6x11x1): Measurement grid: dx=15mm, dy=15mm Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Power Drift = 0.02 dB Peak SAR (extrapolated) = 5.16 W/kg SAR(1 g) = 2.35 W/kg; SAR(10 g) = 1.56 W/kg 0 dB = 4.03 W/kg DT&C Co., Ltd. DUT: Dipole 1800 MHz; Type: D1800V2; Serial: D1800V2 - SN:2d202 Communication System: UID 0, CW (0); Frequency: 1800 MHz; Duty Cycle: 1:1 Medium parameters used: f = 1800 MHz; σ = 1.397 S/m; ε r = 39.398; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY5 Configuration: Probe: EX3DV4 - SN7337; ConvF(8.48, 8.48, 8.48); Calibrated: 9/23/2020 Electronics: DAE4 Sn1335 Sensor-Surface: 2mm (Mechanical Surface Detection) Phantom: SAM with CRP v5.0; Type: QD000P40CD; Serial: TP:1837 Measurement SW: DASY52, Version 52.10 (3); SEMCAD X Version 14.6.13 (7474) Test Date: 2020-10-21; Ambient Temp: 22.7; Tissue Temp: 22.6 1800 MHz System Verification (100 mW) Area Scan (6x9x1): Measurement grid: dx=15mm, dy=15mm Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Power Drift = -0.18 dB Peak SAR (extrapolated) = 11.4 W/kg SAR(1 g) = 3.88 W/kg; SAR(10 g) =1.99 W/kg 0 dB = 6.94 W/kg DT&C Co., Ltd. DUT: Dipole 1900 MHz; Type: D1900V2; Serial: D1900V2 - SN:5d176 Communication System: UID 0, CW (0); Frequency: 1900 MHz; Duty Cycle: 1:1 Medium parameters used: f = 1900 MHz; σ = 1.402 S/m; ε r = 39.094; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY5 Configuration: Probe: EX3DV4 - SN7337; ConvF(8.19, 8.19, 8.19); Calibrated: 9/23/2020 Electronics: DAE4 Sn1335 Sensor-Surface: 2mm (Mechanical Surface Detection) Phantom: SAM with CRP v5.0; Type: QD000P40CD; Serial: TP:1837 Measurement SW: DASY52, Version 52.10 (3); SEMCAD X Version 14.6.13 (7474) Test Date: 2020-10-20; Ambient Temp: 20.8; Tissue Temp: 20.7 1900 MHz System Verification (100 mW) Area Scan (6x9x1): Measurement grid: dx=15mm, dy=15mm Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Power Drift = 0.11 dB Peak SAR (extrapolated) = 11.7 W/kg SAR(1 g) = 3.97 W/kg; SAR(10 g) = 2.10 W/kg 0 dB = 7.09 W/kg DT&C Co., Ltd. DUT: Dipole 2450 MHz; Type: D2450V2; Serial: D2450V2 - SN:920 Communication System: UID 0, CW (0); Frequency: 2450 MHz; Duty Cycle: 1:1 Medium parameters used: f = 2450 MHz; σ = 1.75 S/m; ε r = 39.581; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY5 Configuration: Probe: EX3DV4 - SN7337; ConvF(7.51, 7.51, 7.51); Calibrated: 9/23/2020 Electronics: DAE4 Sn1335 Sensor-Surface: 2mm (Mechanical Surface Detection) Phantom: SAM with CRP v5.0; Type: QD000P40CD; Serial: TP:1837 Measurement SW: DASY52, Version 52.10 (3); SEMCAD X Version 14.6.13 (7474) Test Date: 2020-11-02; Ambient Temp: 22.4; Tissue Temp: 22.2 2450 MHz System Verification (100 mW) Area Scan (7x9x1): Measurement grid: dx=12mm, dy=12mm Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=5mm, dy=5mm, dz=5mm Power Drift = 0.01 dB Peak SAR (extrapolated) = 13.0 W/kg SAR(1 g) = 5.01 W/kg; SAR(10 g) = 2.38 W/kg 0 dB = 10.1 W/kg DT&C Co., Ltd. DUT: Dipole 5000 MHz; Type: D5GHzV2; Serial: D5GHzV2 - SN:1212 Communication System: UID 0, CW (0); Frequency: 5300 MHz; Duty Cycle: 1:1 Medium parameters used: f = 5300 MHz; σ = 4.886 S/m; ε r = 35.717; ρ = 1000 kg/m 3 Phantom section: Flat Section DASY5 Configuration: Probe: EX3DV4 - SN7337; ConvF(5.51, 5.51, 5.51); Calibrated: 9/23/2020 Electronics: DAE4 Sn1335 Sensor-Surface: 1.4mm (Me…

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Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 2 /178 Test Report Version Test Report No. Date Description Tested by Reviewed by DRRFCC2011-0115 Nov. 23, 2020 Initial issue BumJun Park HakMin Kim Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 3 /178 Table of Contents 1. DESCRIPTION OF DEVICE ................................................................................................................................................ 5 1.1 General Information ..................................................................................................................................................... 5 1.2 Power Reduction for SAR ............................................................................................................................................ 7 1.3 Nominal and Maximum Output Power Specifications .................................................................................................. 7 1.4 DUT Antenna Locations ............................................................................................................................................... 7 1.5 Simultaneous Transmission Capabilities ..................................................................................................................... 7 1.6 Miscellaneous SAR Test Considerations ..................................................................................................................... 8 1.7 Guidance Applied ........................................................................................................................................................ 9 1.8 Device Serial Numbers ................................................................................................................................................ 9 1.9 FCC & ISED MRA test lab designation no. : KR0034 .................................................................................................. 9 2. LTE INFORMATION ........................................................................................................................................................... 10 3. INTROCUCTION ................................................................................................................................................................ 11 4. DOSIMETRIC ASSESSMENT ........................................................................................................................................... 12 4.1 Measurement Procedure ........................................................................................................................................... 12 5. DEFINITION OF REFERENCE POINTS ........................................................................................................................... 14 5.1 Ear Reference Point .................................................................................................................................................. 14 5.2 Handset Reference Points ......................................................................................................................................... 14 6. TEST CONFIGURATION POSITIONS FOR HANDSETS ................................................................................................. 15 6.1 Device Holder ............................................................................................................................................................ 15 6.2 Positioning for Cheek/Touch ...................................................................................................................................... 15 6.3 Positioning for Ear / 15 ° Tilt ...................................................................................................................................... 15 6.4 Body-Worn Accessory Configurations ....................................................................................................................... 16 6.5 Extremity Exposure Configurations ........................................................................................................................... 16 6.6 Wireless Router Configurations ................................................................................................................................. 17 6.7 Phablet Configurations .............................................................................................................................................. 17 7. RF EXPOSURE LIMITS ..................................................................................................................................................... 18 8. FCC MEASUREMENT PROCEDURES ............................................................................................................................ 19 8.1 Measured and Reported SAR ................................................................................................................................... 19 8.2 Procedures Used to Establish RF Signal for SAR ..................................................................................................... 19 8.3 SAR Measurement Conditions for WCDMA (UMTS) ................................................................................................. 19 8.3.1 Output Power Verification ..................................................................................................................................... 19 8.3.2 Head SAR Measurements for Handsets .............................................................................................................. 19 8.3.3 Body SAR Measurements .................................................................................................................................... 20 8.3.4 Release 5 HSDPA Data Devices …

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Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 101 /178 APPENDIX B. – Dipole Calibration Data Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 102 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 103 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 104 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 105 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. 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Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 142 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 143 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 144 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 145 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 146 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. 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Pages: 159 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 160 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 161 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 162 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 163 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 164 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 165 /178 Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 166 /178 APPENDIX C. – SAR Tissue Specifications Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 167 /178 The brain and muscle mixtures consist of a viscous gel using hydrox-ethylcellulose (HEC) gelling agent and saline solution (see Table 3.1). Preservation with a bactericide is added and visual inspection is made to make sure air bubbles are not trapped during the mixing process. The mixture is calibrated to obtain proper dielectric constant (permittivity) and conductivity of the desired tissue. The mixture characterizations used for the brain and muscle tissue simulating liquids are according to the data by C. Gabriel and G. Harts grove. Table C.1 Composition of the Tissue Equivalent Matter Ingredients (% by weight) Frequency (MHz) 835 1 900 2 450 5 200 ~ 5 800 Tissue Type Head BodyHeadBodyHeadBody Head Body Water 40.19 50.75 55.24 70.23 71.88 73.40 65.52 80.00 Salt (NaCl) 1.480 0.940 0.310 0.290 0.160 0.060 - - Sugar 57.90 48.21- - - - - - HEC 0.250 - - - - - - - Bactericide 0.180 0.100- - - - - - Triton X-100 - - - - 19.97- 17.24 - DGBE - - 44.45 29.48 7.990 26.54 - - Diethylene glycol hexyl ether - - - - - - 17.24 - Polysorbate (Tween) 80 - - - - - - 20.00 Target for Dielectric Constant 41.5 55.2 40.0 53.3 39.2 52.7 - - Target for Conductivity (S/m) 0.90 0.97 1.40 1.52 1.80 1.95 - - Figure 3.9 Simulated Tissue Report No.: DRRFCC2011-0115 FCC ID: SS4HF550 TRF-RF-601(03)161101 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 168 /178 Table C.2 HSL/MSL750 (Head and Body liquids for 700 – 800 MHz) Item Head Tissue Simulation Liquids HSL750 Muscle (body) Tissue Simulation Liquids MSL750 Type No SL AAH 075, SL AAM 075 Manufacturer SPEAG The item is composed of the following ingredients: H 2 O Water, 35 – 58% Sucrose Sucrose, 40 – 60% NaCl Sodium Chloride, 0 – 6% Hydroxyethyl-cellulose Medium Viscosity (CAS# 9004-62-0), < 0.3% Preventol-D7 Preservative: aqueous preparation, (CAS# 55965-84-9), containing 5- chloro-2-methyl-3(2H)-isothiazolone and 2-methyyl-3(2H)-isothiazol…

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Report No.: DRTFCC2011-0355 FCC ID: SS4HF550 TRF-RF-230(05)171208 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 2 / 23 ` Test Report Version Test Report No. Date Description Revised by Reviewed by DRTFCC2011-0355 Nov. 19, 2020 Initial issue InHee Bae JaeJin Lee Report No.: DRTFCC2011-0355 FCC ID: SS4HF550 TRF-RF-230(05)171208 Prohibits the copying and re-issue of this report without DT&C approval. Pages: 3 / 23 Table of Contents 1. GENERAL INFORMATION ........................................................................ 4 2. INTRODUCTION ........................................................................................ 7 2.1 EUT DESCRIPTION ............................................................................................................. 7 2.2. TESTING ENVIRONMENT .................................................................................................. 7 2.3. MEASURING INSTRUMENT CALIBRATION ...................................................................... 7 2.4. MEASUREMENT UNCERTAINTY ....................................................................................... 7 2.5. TEST FACILITY ................................................................................................................... 7 3. DESCRIPTION OF TESTS ...................…

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