VSODX-7400Digital 5W Portable Radio

User Manual Version #1 (2023-05-30) VHF/UHF Transceiver DX-7100 DX-7400 2 1. DX-7000 Series Features The DX-7000 series digital radio is equipped with a large, cool 2.0-inch TFT color LCD and a full keypad to provide a variety of services, including control of various industrial facilities. ⚫ Dual-mode(Analog & DMR) Operation ⚫ 1024 Channel Capacity, 64 Zones (1zone = Max 1024 Channels) ⚫ 5/1 Watt RF Power Setting ⚫ Text Messaging with inbox and outbox, Up to 10 Predefined messages. ⚫ Voice Recording and playback ⚫ Remote Stun / Revive / Monitor function. ⚫ Alpha-Numeric Full Keypad ⚫ TDMA Direct Mode ⚫ Voice Encryption Mode (AES256, DMRA256) ⚫ DTMF Encode & Decode ⚫ 2-Tone Encode & Decode ⚫ Lone Worker Mode ⚫ Multiple Scan Modes ⚫ VOX (Voice Operated Transmit) ⚫ Busy Channel Lock (BCL) / Busy Channel Lock Override (BCLO) / Time-Out Timer (TOT) ⚫ Emergency / Siren ⚫ Transmit Interrupt (Option) ⚫ Man down function(Option) ⚫ SFR(Single Frequency Repeater) (Option) ⚫ Etiquette (Vibration) Function (Option) ⚫ Built in GPS(Option) ⚫ 1Watt Audio output ⚫ Built in Flash Lamp ⚫ 2.0 inch TFT LCD(176 x 220) Display ⚫ Waterproof IP67 ⚫ MIL STD 810F/G ⚫ DC+7.4V Li-ion / 2,600mAH 3 2. Specification DX-7000 Series General Frequency Range Frequency Stability Programmable Channels Channel Spacing Digital Vocoder Dimensions Weight Power Source Current Drain (maximum) DX-7100 VHF : 136~174 MHz DX-7400 UHF : 400 ~470 MHz ±1.5ppm (-30 to +60°C) 64 Zones / 1,024 Channels 12.5KHz(DMR), 12.5KHz/25KHz(Analog) AMBE++ Voice Compression Algorithm 103mm(H) x 52mm(W) x 32mm(D) 275g DC +7.4V Li-ion 2,600mAH Battery Receive mode, rated audio out – 420 (Audio Max) Transmit mode – 1,200mA Standby mode – 100mA Receiver Sensitivity Squelch Sensitivity Selectivity Spurious and Harmonic Rejection FM Hum and Noise Audio Output Power Audio Distortion Audio Response Input Impedance 0.22uV 12 dB SINAD 0.20uV 10dB SINAD 60dB @12.5KHz -57 dBm (< 1GHz) -47 dBm (> 1GHz) 40dB (12.5KHz) 1 Watt across an 16-ohm load Less than 3% at rated output +1, -3 dB from 6dB per octave de-emphasis Characteristic from 300 ~ 3000Hz 50 ohms Transmitter RF Power Output Adjacent Channel Power Spurious and Harmonic FM Hum and Noise Audio Distortion Audio Frequency Response Output Impedance 5/1Watt 60 dB @12.5 kHz -36 dBm (< 1GHz) -30 dBm (> 1GHz) 40dB (12.5KHz) 3% maximum with 1KHz modulation +1, -3dB from 6dB per octave pre-emphasis Characteristic from 300 ~ 3000Hz 50ohms 4 3. In-Box Contents Radio Unit Battery 2 Slot Charger Adapter Antenna Belt Clip User Manual Figure 3-1) DX-7000 Series Main Package Contents XB-2600 : 2,600mAH Li-ion Battery Pack XC-100D : One Slot Charger XC-200D : Dual Slot Charger XC-1000D : 10 Slot Gang Charger 423D-WS : 400~450MHz SMA Whip Antenna 460D-WS : 440~470MHz SMA Whip Antenna 5 4. Buttons & LCD Icons Figure 4-1) DX-7000 Series buttons and knobs 6 Figure 4-2) DX-7000 LCD Icons Button & Jack Operation Description Power ON/OFF Volume Switch There will be a sound with a logo on LCD when turning ON the radio. When turning the knob to counter-clockwise, the radio will be turned OFF. You can also control the Volume level with the knob. It volumes up when you turn it clockwise and volumes down when you turn it counter-clockwise. SOS Button When the SOS button is pressed in an emergency situation, a warning alarm alerts the current emergency situation. PTT Button The radio transmits messages when pressing PTT button. It receives messages when releasing the PTT button. In order to have clear sound when transmitting, it is recommended to speak around 5~10cm away from the MIC. Zone UP/Down Button When pressing Zone button, the Zone registered in the program will be selected in order. You can choose the channel by using UP/Down button in the selected zone. 7 Menu / select Button Press the Menu/select button to make a selection on the menu or enter its menu options. Contact Button Press the button to enter the contact list programmed into the radio such as Private, Group and All Call. Menu-Back Button Menu-back button is used to cancel out of a menu or return to the previous menu screen. Home Button Home button is used to return to the initial screen. 5. Installation and Removal 5.1 Antenna Installation and Removal To install the antenna, insert the antenna into antenna connector and screw the antenna clockwise. To remove the antenna, screw the antenna counter clockwise. Figure 5-1) Antenna Installation and Removal 8 1. Do not over tighten the antenna as it may cause damage to the radio 2. NEVER HOLD by the antenna when carrying the transceiver. 3. Transmitting without an antenna may damage the transceiver. 5.2 Battery Installation and Removal As shown the figure 5-2) below, to remove the battery, press the locking latch in the direction of arrow 1 and pull up the battery latch in the direction of arrow 2 to pull it away from the radio. To attach the battery, align the battery pack with the groove of the body (arrow 3) and push the locking latch down to the direction of arrow 4. The battery latch will click shut when locked. Figure 5-2) Battery Removal and Installation 5.3 Belt Clip Installation and Removal As shown the figure 5-3) below, Belt clip attaches to the back of the radio above the battery. To attach the belt clip, align the belt clip to the grooves on the back of the radio and push it down to the direction of arrow 1. Clip will click when locked. To remove the belt clip, push the belt clip locking tab in the direction of arrow 2 and pull the belt clip up to the direction of arrow 3 at the same time. 9 Figure 5-3) Belt Clip Installation and Removal 5.4 External Accessory Connector Jack To connect the external accessory as shown in Figure 5-4, unscrew the accessory jack cover to the direction of arrow 1, align the accessory with the radio, and then put the accessory on the accessory connector position to screw up. To remove the external accessory, unscrew the accessory to direction of arrow 3 and then pull it away to the d…

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Yeonhwa M Tech Co.,Ltd 36, Jeonpa-ro, 44beon-gil, Manan-gu, Anyang-si, Gyeonggi-do, korea 14086 Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 7/6/2023 U.S. Agent Designation Yeonhwa M Tech Co.,Ltd acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID: VSODX-7400): Name and company of U.S. agent: Formates LLC Physical U.S. address of agent: 1400 Hudson St, Hoboken, New Jersey, 07030, USA FRN of U.S. agent: 0033456468 Email address of U.S. agent: [email protected] Formates LLC acknowledges their obligation to accept service of process on behalf of Yeonhwa M Tech Co.,Ltd. Yeonhwa M Tech Co.,Ltd with the FRN 0017098799 accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, Signature Hwan-Dae Kim CTO {Applicant Company} Signature Abi Aribisala Project Manager Formates LLC 48_[mo del] US_Agent_2.911(d)(7) - U, V0 5

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-7400 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd. Page 1 of 4 EXTERIOR PHOTOGRAPHS OF EUT Fig.1 Fig.2 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-7400 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd. Page 2 of 4 Fig.3 Fig.4 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-7400 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd. Page 3 of 4 Fig.5 Fig.6 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-7400 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd. Page 4 of 4 Fig.7 Antenna

Label & Label Location Label Size：27.5mm*16.0mm FCC ID: VSODX-7400 IC: 184A-DX7400 Model/HVIN: DX-7400

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-7400 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 1 of 4 INTERIOR PHOTOGRAPHS OF EUT Fig.1 Fig.2 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-7400 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 2 of 4 Fig.3 Fig.4 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-7400 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 3 of 4 Fig.5 Fig.6 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-7400 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 4 of 4 Fig.7 Fig.8

ReportNo.:AGC08217230603AP02 Page 1 of11 EUTPHOTOGRAPHS AllVIEWOFEUT TOPVIEWOFEUT PTT Antenna ReportNo.:AGC08217230603AP02 Page 2 of11 BOTTOMVIEWOFEUT FRONTVIEWOFEUT ReportNo.:AGC08217230603AP02 Page 3 of11 BACKVIEWOFEUT LEFTVIEWOFEUT ReportNo.:AGC08217230603AP02 Page 4 of11 RIGHTVIEWOFEUT OPENVIEWOFEUT-1 ReportNo.:AGC08217230603AP02 Page 5 of11 OPENVIEWOFEUT-2 OPENVIEWOFEUT-3 ReportNo.:AGC08217230603AP02 Page 6 of11 OPENVIEWOFEUT-4 OPENVIEWOFEUT-5 ReportNo.:AGC08217230603AP02 Page 7 of11 INTERNALVIEWOFEUT-1 INTERNALVIEWOFEUT-2 ReportNo.:AGC08217230603AP02 Page 8 of11 INTERNALVIEWOFEUT-3 INTERNALVIEWOFEUT-4 ReportNo.:AGC08217230603AP02 Page 9 of11 INTERNALVIEWOFEUT-5 INTERNALVIEWOFEUT-6 ReportNo.:AGC08217230603AP02 Page 10 of11 INTERNALVIEWOFEUT-7 INTERNALVIEWOFEUT-8 ReportNo.:AGC08217230603AP02 Page 11 of11 ANTENNAVIEWOFEUT-1 ANTENNAVIEWOFEUT-2 ----ENDOFREPORT----

Page1of18 CALIBRATIONDATA PROBECALIBRATIONDATA Page2of18 Page3of18 Page4of18 Page5of18 Page6of18 Page7of18 Page8of18 Page9of18 Page10of18 DAECALIBRATIONDATA Page11of18 Page12of18 Page13of18 DIPOLECALIBRATIONDATA Page14of18 Page15of18 Page16of18 Page17of18 Page18of18

Page1of39 SARTestReport ReportNo.:AGC08217230603FH01 FCCID: VSODX-7400 PRODUCTDESIGNATION: Digital5WPortableRadio BRANDNAME: MODELNAME: DX-7400,DX-7400R,CP-740,VR7400D,RCD7400,X740, MDP-7424,MDP-7416 APPLICANT: YeonHwaMTechCo.,Ltd. DATEOFISSUE: Jun.30,2023 STANDARD(S): IEEEStd.1528:2013 FCC47CFRPart2§2.1093 IEEEStdC95.1™-2005 REPORTVERSION: V1.0 AttestationofGlobalCompliance(Shenzhen)Co.,Ltd. ReportNo.:AGC08217230603FH01 Page 2 of 39 ReportReviseRecord ReportVersionReviseTimeIssuedDateValidVersionNotes V1.0/Jun.30,2023ValidInitialRelease ReportNo.:AGC08217230603FH01 Page 3 of 39 TestReport ApplicantNameYeonHwaMTechCo.,Ltd. ApplicantAddress36,Jeonpa-ro44beon-gil,Manan-gu,Anyang-si,Gyeonggi-do14086,Korea ManufacturerNameYeonHwaMTechCo.,Ltd. ManufacturerAddress36,Jeonpa-ro44beon-gil,Manan-gu,Anyang-si,Gyeonggi-do14086,Korea FactoryNameYeonHwaMTechCo.,Ltd. FactoryAddress36,Jeonpa-ro44beon-gil,Manan-gu,Anyang-si,Gyeonggi-do14086,Korea ProductDesignationDigital5WPortableRadio BrandName ModelNameDX-7400 SeriesModelDX-7400R,CP-740,VR7400D,RCD7400,X740,MDP-7424,MDP-7416 DeclarationofDifference Allthesameexceptforthemodelnameandbrandname correspondingtoDX-7400,DX-7400R,CP-740,VR7400D, RCD7400,X740; correspondingtoMDP-7424,MDP-7416 EUTVoltageDC7.4V ApplicableStandard IEEEStd.1528:2013 FCC47CFRPart2§2.1093 IEEEStdC95.1™-2005 DateofreceiptoftestitemJun.26,2023 TestDateJun.28,2023 ReportTemplateAGCRT-US-PTT/SAR(2021-04-20) Note:Theresultsoftestinginthisreportapplytotheproduct/systemwhichwastestedonly. PreparedBy TheaHuang (ProjectEngineer) Jun.28,2023 ReviewedBy CalvinLiu (Reviewer) Jun.30,2023 ApprovedBy MaxZhang (AuthorizedOfficer) Jun.30,2023 ReportNo.:AGC08217230603FH01 Page 4 of 39 TABLEOFCONTENTS 1.SUMMARYOFMAXIMUMSARVALUE...........................................................................................................5 2.GENERALINFORMATION................................................................................................................................6 2.1.EUTDESCRIPTION..........................................................................................................................................6 3.SARMEASUREMENTSYSTEM.........................................................................................................................7 3.1.THEDASY5SYSTEMUSEDFORPERFORMINGCOMPLIANCETESTSCONSISTSOFFOLLOWINGITEMS....................7 3.2.DASY5E-FIELDPROBE..................................................................................................................................8 3.3.DATAACQUISITIONELECTRONICSDESCRIPTION.................................................................................................8 3.4.ROBOT...........................................................................................................................................................9 3.5.LIGHTBEAMUNIT............................................................................................................................................9 3.6.DEVICEHOLDER............................................................................................................................................10 3.7.MEASUREMENTSERVER................................................................................................................................10 3.8.PHANTOM..................................................................................................................................................11 4.SARMEASUREMENTPROCEDURE.............................................................................................................12 4.1.SPECIFICABSORPTIONRATE(SAR)...............................................................................................................12 4.2.SARMEASUREMENTPROCEDURE.................................................................................................................13 5.TISSUESIMULATINGLIQUID.........................................................................................................................15 5.1.THECOMPOSITIONOFTHETISSUESIMULATINGLIQUID.....................................................................................15 5.2.TISSUEDIELECTRICPARAMETERSFORHEADANDBODYPHANTOMS...............................................................15 5.3.TISSUECALIBRATIONRESULT.........................................................................................................................16 6.SARSYSTEMCHECKPROCEDURE.............................................................................................................17 6.1.SARSYSTEMCHECKPROCEDURES..............................................................................................................17 7.EUTTESTPOSITION.......................................................................................................................................19 7.1.BODYWORNPOSITION..................................................................................................................................19 8.SAREXPOSURELIMITS.................................................................................................................................20 9.TESTFACILITY................................................................................................................................................21 10.TESTEQUIPMENTLIST................................................................................................................................22 11.MEASUREMENTUNCERTAINTY..................................................................................................................23 12.POWERMEASUREMENT..............................................................................................................................27 13.TESTRESULTS.............................................................................................................................................28 13.1.SARTESTRESULTSSUMMARY...........…

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FCC Test Report Applicant Name: : Yeonhwa M Tech Co.,Ltd FCC ID : VSODX-7400 Equipment Type : Digital 5W Portable Radio Models Name : DX-7400, DX-7400R, CP-740, VR7400D, RCD7400, X740, MDP- 7424, MDP-7416 Report Number : TZ230604465-E Date Of Receipt : June 16, 2023 Date Of Issue : June 30, 2023 Test By : (Anna Hu) Supervised by : (Hugo Chen) Approved by : (Andy Zhang) Tested by : Shenzhen Tongzhou Testing Co.,Ltd 1th Floor, Building 1, Haomai High-tech Park, Huating Road 387, Dalang Street, Longhua, Shenzhen, China The test report apply only to the specific sample(s) tested under stated test conditions It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Page 2 of 48 Report No.: TZ230604465-E REPORT REVISE RECORD Revision Description Issued Data Remark Revision 00 Initial Test Report Release June 30, 2023 Andy Zhang Page 3 of 48 Report No.: TZ230604465-E CONTENT 1. TEST STANDARDS ............................................................................................................................................... 4 2. GENERAL INFORMATION .................................................................................................................................... 5 2.1. DIFFERENCE OF MODELS .............................................................................................................................................. 6 2.2. EUT OPERATION MODE ............................................................................................................................................... 6 2.3. BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................... 6 2.4. RELATED SUBMITTAL(S) / GRANT (S) .............................................................................................................................. 6 3. TEST ENVIRONMENT .......................................................................................................................................... 7 3.1. ADDRESS OF THE TEST LABORATORY ............................................................................................................................... 7 3.2. TEST FACILITY ............................................................................................................................................................ 7 3.3. ENVIRONMENTAL CONDITIONS ...................................................................................................................................... 7 3.4. TEST DESCRIPTION ...................................................................................................................................................... 8 3.5. STATEMENT OF THE MEASUREMENT UNCERTAINTY ............................................................................................................ 8 3.6. EQUIPMENTS USED DURING THE TEST ............................................................................................................................ 9 4. TEST CONDITIONS AND RESULTS ...................................................................................................................... 10 4.1. RF Power Output(Conducted Method) ............................................................................................................ 10 4.2. Modulation Characteristics ............................................................................................................................. 11 4.3. Occupied Bandwidth and Emission Mask ........................................................................................................ 20 4.4. Field Strength Spurious Emissions ................................................................................................................... 36 4.5. Conducted sprious emission result(at antenna terminal): ............................................................................... 40 4.6. Frequency Stability .......................................................................................................................................... 43 4.7. Transient Frequency Behavior ......................................................................................................................... 45 Page 4 of 48 Report No.: TZ230604465-E 1. T E S T S T A N D A R D S The tests were performed according to following standards: FCC Part 2: FREQUENCY ALLOCA-TIONS AND RADIO TREATY MAT-TERS; GENERAL RULES AND REG-ULATIONS FCC Part 90: PRIVATE LAND MOBILE RADIO SERVICES. ANSI/TIA-603-E-2016: Land Mobile FM or PM Communications Equipment Measurement and Performance Standards. ANSI C63.26-2015: IEEE/ANSI Standard for Compliance Testing of Transmitters Used in Licensed Radio Services Page 5 of 48 Report No.: TZ230604465-E 2. G E N E R A L I N F O R M A T I O N Models Name DX-7400, DX-7400R, CP-740, VR7400D, RCD7400, X740, MDP-7424, MDP-7416 Difference description See 2.1 of this report Test Model DX-7400 Applicant Yeonhwa M Tech Co.,Ltd Address 36, Jeonpa-ro, 44beon-gil, Manan-gu, Anyang-si, Gyeonggi-do, korea 14086 Manufacturer Yeonhwa M Tech Co.,Ltd Address 36, Jeonpa-ro, 44beon-gil, Manan-gu, Anyang-si, Gyeonggi-do, korea 14086 Equipment Type Digital 5W Portable Radio Trade Mark , Hardware version: BK74-R1 Software version: V2.5.2.0 Extreme Temp. Tolerance -10°C-+55°C EUT Power Rating DC 7.4 V by battery Operating Frequency 406.1 MHz – 470 MHz Channel Spacing 12.5 KHz Modulation Type FM, 4FSK Emission Designation FM VOICE:11K0F3E 4FSK VOICE:7K60F1E 4FSK DATA:7K60F1D Antenna Type: Detachable Antenna Antenna gain: 0.0 dBi Data of receipt June 16, 2023 Date of test June 16, 2023 to June 29, 2023 Deviation None Test Sample ID TZ230604465-1# Condition of Test Sample Normal Page 6 of 48 Report No.: TZ230604465-E 2.1. Difference of Models Model(s) Brand name Function Difference description Appearance DX-7400, DX-7400R, CP-740, VR7400D, RC…

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Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-7400 TEST SETUP PHOTOS OF THE EUT Radiated Emission Below 1GHz Radiated Emission Above 1GHz Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-7400 RF conducted Test