2AP22-HT03-V3-433TELEMETRY RADIO 433MHZ

TELEMETRY RADIO 433MHZ Overview A Holybro Telemetry Radio is a small, light and inexpensive open source radio platform that typically allows ranges of better than 300m “out of the box” (the range can be extended to several kilometres with the use of a patch antenna on the ground). The radio uses open source firmware which has been specially designed to work well with MAVLink packets and to be integrated with the Mission Planner, Copter, Rover and Plane. The radios can be 433Mhz and you should purchase the model which is appropriate for your country/region. Circuit Description Holybro Telemetry Radio base on Silicon Labs’ Si1000, it is a Wireless MCU combine high-performance wireless connectivity and ultra-low power microcontroller processing into a small 5 mm x 7 mm form factor. Support for major frequency bands in the 433MHz range is provided including an integrated advanced packet handling engine and the ability to realize a link budget of up to 121 dB. The devices have been optimized to minimize energy consumption for battery-backed applications by minimizing TX, RX, active, and sleep mode current as well as supporting fast wake-up times. The main features of the Holybro Radio are listed below: •Available in 433MHz •Receiver sensitivity to -121 dBm •Transmit power up to 20dBm (100mW) •Transparent serial link •Air data rates up to 250kbps •MAVLink protocol framing and status reporting •Frequency hopping spread spectrum (FHSS) •Adaptive time division multiplexing (TDM) •Support for LBT and AFA •Configurable duty cycle •Built-in error correcting code (can correct up to 25% data bit errors) •AT commands for radio configuration •RT commands for remote radio configuration •GFSK modulation The FT230X is a USB to serial UART interface data transfer chip. It gives the radio the ability to connect to a USB host device. PortDescription StatusLEDs Theradioshave2statusLEDs,oneredandonegreen.ThemeaningofthedifferentLEDstatesis: GreenLEDblinking-searchingforanotherradio GreenLEDsolid-linkisestablishedwithanotherradio RedLEDflashing-transmittingdata RedLEDsolid-infirmwareupdatemode ConnectingtoPixhawk Usethe4pinJST-GHconnectorthatshouldhavecomewiththeradiotoconnecttheradiotoyour Pixhawk’s“Telem1”(“Telem2”canalsobeusedbutthedefaultrecommendationis“Telem1”). ConnectingtoaPC ConnectingtheradiotoyourWindowsPCisassimpleasconnectingthemicroUSBcable(which shouldhavebeenincludedwiththeradio)toyourPC.Thenecessarydriversshouldbeinstalled automaticallyandtheradiowillappearasanew“USBSerialPort”intheWindowsDevice ManagerunderPorts(COM&LPT).TheMissionPlanner’sCOMPortselectiondrop-downshould alsocontainthesamenewCOMport. FCC STATEMENT : This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. Warning: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. FCC Radiation Exposure Statement: The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure c ondition without restriction.

- HOLYBRO(H.K.) LIMITED - 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. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 12/5/2023 U.S. Agent Designation [HOLYBRO(H.K.) LIMITED] 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: [2AP22-HT03-V3-433]): Name and company of U.S. agent: Stone Trading Limited Physical U.S. address of agent: 6547 N Academy Blvd #2266,Colorado Springs.CO 80918,United States FRN of U.S. agent: 0033401936 Email address of U.S. agent: [email protected] [Stone Trading Limited] acknowledges their obligation to accept service of process on behalf of [HOLYBRO(H.K.) LIMITED]. [HOLYBRO(H.K.) LIMITED] with the FRN [0027587872] 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). Sincerely, Signature [Name] Pu Zhide [Title] Manager [Company] HOLYBRO(H.K.) LIMITED Signature [Name of U.S. agent] Dongmei Pang [Title of U.S. agent] Manager [Company of U.S. agent] Stone Trading Limited 48_[mo del] US_Agent_2.911(d)(7) - U, V04

HOLYBRO(H.K.) LIMITED 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. Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 12/5/2023 To whom it may concern: We, [HOLYBRO(H.K.) LIMITED], hereby certify that the equipment for which authorization is sought (FCC ID: [2AP22-HT03-V3-433]) is not “covered” equipment prohibited from receiving an equipment authorization pursuant to § 2.903 of the FCC rules. We also certify that, as of the date of the filing of the application, we are not identified on the Covered List (https://www.fcc.gov/supplychain/coveredlist ) as an entity producing “covered” equipment. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(b) and (d)(5) and (6). Sincerely, Signature [Name] Pu Zhide [Title] Manager [Company] HOLYBRO(H.K.) LIMITED 62_[model] CoveredEqu_2.911(d)(5)(i) and (ii) - U, V02

Page 1 of 5 Report No.: 8133EU012003W-AB ANNEX B EXTERNAL PHOTOS PHOTO 1 PHOTO 2 Columnar Antenna Page 2 of 5 Report No.: 8133EU012003W-AB PHOTO 3 PHOTO 4 Page 3 of 5 Report No.: 8133EU012003W-AB PHOTO 5 PHOTO 6 Page 4 of 5 Report No.: 8133EU012003W-AB PHOTO 7 PHOTO 8 Page 5 of 5 Report No.: 8133EU012003W-AB PHOTO 9 --- End ---

Label Location On EUT Label Product Name: TELEMETRY RADIO 433MHZ Model Number: HT03-V3-433 Trademark: Holybro FCC ID: 2AP22-HT03-V3-433

Page 1 of 2 Report No.: 8133EU012003W-AC ANNEX C INTERNAL PHOTOS PHOTO 1 PHOTO 2 Page 2 of 2 Report No.: 8133EU012003W-AC PHOTO 3 --- End ---

RFEXPOSUREEVALUATION EUTSpecification EUTTELEMETRYRADIO433MHZ ModelNameHT03-V3-433,HT03-433 FCCID2AP22-HT03-V3-433 Frequencyband (Operating) WLAN:2.412GHz~2.462GHz WLAN:5.18GHz~5.32GHz/5.50GHz~5.70GHz WLAN:5.745GHz~5825GHz Others(433.16-434.46MHz) DevicecategoryPortable(<20cmseparation) Mobile(>20cmseparation) Others___ AntennadiversitySingleantenna Multipleantennas Txdiversity Rxdiversity Tx/Rxdiversity Max.outputpower76.27dBuV/m(-18.99dBm) Antennagain2.5dBi EvaluationappliedMPEEvaluation SAREvaluation StandardRequirement PortableDevice Accordingto§15.247(i)and§1.1307b(1),systemsoperatingundertheprovisionsofthissection shallbeoperatedinamannerthatensuresthatthepublicisnotexposedtoradiofrequency energylevelsinexcessoftheCommission’sguidelines.SeeKDB447498D01GeneralRF ExposureGuidanceV6,section4.3.1. The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparation distances≤50mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]·[√f(GHz)]≤3.0for1-gSARand≤7.5for10-gextremitySAR, 16 where ·f(GHz)istheRFchanneltransmitfrequencyinGHz ·PoweranddistanceareroundedtothenearestmWandmmbeforecalculation17 ·Theresultisroundedtoonedecimalplaceforcomparison Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤50 mmandfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmisappliedtodetermineSARtestexclusion. MeasurementResult Channel Frequency (GHz) MaxOutput power (dBm) Maxtune-up tolerance Outputpower (dBm) Max Output power (dBm) MaxOutput power (mW) Calculation Value (Note1) Threshold Value 0.43446-18.99 -18.99±1 -17.990.01590.00213.0 EIRP=E-104.8+20logD=76.27-104.8+20log3=-18.99dBm Note1:CalculationValue=[(max.powerofchannel,mW)/(min. testseparationdistance,mm)]·[√f(GHz)]. Calculation:0.0159/5*√0.43446= 0.0021 ≤3.0 AccordingtoKDB447498D01V6,thresholdatwhichnoSARrequiredis≤3.0for1-gSAR, separationdistanceis5mm,andnosimultaneousSARmeasurementisrequired. TheSARmeasurementisnotnecessary.

TEST REPORT Report No.: 8133EU012003W Applicant: HOLYBRO(H.K.) LIMITED Address: RM 1902 EASEY COMM BLDG253-261 HENNESSY RD WANCHAI Hongkong China Product Name: TELEMETRY RADIO 433MHZ Model No.: HT03-V3-433, HT03-433 Trademark: Holybro FCC ID: 2AP22-HT03-V3-433 Test Standard(s): 47 CFR Part 15 Subpart C Date of Receipt: Oct. 23, 2023 Test Date: Oct. 23, 2023 –Dec. 11, 2023 Date of Issue: Dec. 13, 2023 ISSUED BY: SHENZHEN EU TESTING LABORATORY LIMITED Prepared by: Reviewed and Approved by: ____________________ _____________________ Mikey Zhu/ Engineer Sally Zhang/ Manager Page 2 of 34 Report No.: 8133EU012003W TRF No.: FCC Part 15.231 (A01) Revision Record Report Version Issued Date Description Status V0 Dec. 13, 2023 Original Valid Page 3 of 34 Report No.: 8133EU012003W TRF No.: FCC Part 15.231 (A01) Table of Contents 1 COVER PAGE .................................................................................................................................. 1 2 GENERAL INFORMATION ...................................................................................................................... 5 2.1 APPLICANT INFORMATION .................................................................................................................. 5 2.2 MANUFACTURER INFORMATION .......................................................................................................... 5 2.3 FACTORY INFORMATION ..................................................................................................................... 5 2.4 GENERAL DESCRIPTION OF E.U.T. ..................................................................................................... 5 2.5 TECHNICAL INFORMATION OF E.U.T. .................................................................................................. 6 3 TEST SUMMARY ...................................................................................................................................... 7 3.1 TEST STANDARD ............................................................................................................................... 7 3.2 TEST VERDICT ................................................................................................................................... 7 3.3 TEST LABORATORY ........................................................................................................................... 7 4 TEST CONFIGURATION .......................................................................................................................... 8 4.1 TEST ENVIRONMENT .......................................................................................................................... 8 4.2 TEST EQUIPMENT .............................................................................................................................. 8 4.3 DESCRIPTION OF SUPPORT UNIT ........................................................................................................ 9 4.4 TEST MODE ...................................................................................................................................... 9 4.5 MEASUREMENT UNCERTAINTY ........................................................................................................... 9 4.6 DEVIATION FROM STANDARDS ........................................................................................................... 9 4.7 ABNORMALITIES FROM STANDARD CONDITION ................................................................................... 9 5 TEST ITEMS ........................................................................................................................................... 10 5.1 ANTENNA REQUIREMENT .................................................................................................................. 10 5.1.1 Test Requirement .............................................................................................................. 10 5.1.2 Antenna Anti-Replacement Construction .......................................................................... 10 5.1.3 Antenna Gain .................................................................................................................... 10 5.2 CONDUCTED EMISSION AT AC POWER LINE ..................................................................................... 11 5.2.1 Test Requirement .............................................................................................................. 11 5.2.2 Test Setup Diagram .......................................................................................................... 11 5.2.3 Test Procedure .................................................................................................................. 11 5.2.4 Test Data ........................................................................................................................... 11 5.3 20DB BANDWIDTH........................................................................................................................... 14 5.3.1 Test Requirement .............................................................................................................. 14 5.3.2 Test Setup Diagram .......................................................................................................... 14 5.3.3 Test Procedure .................................................................................................................. 14 5.3.4 Test Data ........................................................................................................................... 15 5.4 TRANSMIT TIME ............................................................................................................................... 17 5.4.1 Test Requirement .............................................................................................................. 17 5.4.2 Test Setup Diagram .............................................................…

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version01 HOLYBRO(H.K.) LIMITED Declaration concerning Antenna Specification It is hereby declared that the product Model No.: HT03-V3-433, HT03-433 FCC ID: 2AP22-HT03-V3-433 fulfills the requirement in FCC test relating to the antenna type. The device specified above confirms to the FCC recommendations for Columnar Antenna type(s) described below: Model No. of antenna: 433M ANT Type of antenna: Columnar Antenna Gain of the antenna: 2.5dBi Frequency range: 423-443 MHz The mounting of the antenna is fixed to the radio module and no other antenna should be used. Company name: HOLYBRO(H.K.) LIMITED Address: RM 1902 EASEY COMM BLDG253-261 HENNESSY RD WANCHAI City: Hongkong ZIP / Postal code: Country: China Place: Place: Date: 2023-12-05 Signature:

Shenzhen Kexin Wireless Technology Co., Ltd. Address: Building H, Yongli Industrial Zone, Shabei Hongli, Baolong Street, Longgang District, Shenzhen, China Antenna Specification Summary ITEM ANT SPEC Model Name 433M ANT Frequency 423 -443 MHz Gain in Centre Frequency 423MHz 433MHz 443MHz 2.43 dBi 2.50 dBi 2.41dBi MAX. Gain 2.50 dBi Polarization Omni-Directional Antenna Type Columnar Antenna Antenna Size Φ10*110mm Connect Type SMA-K Radome Color Black Impedance 50 Ohm Operating Temp -25 ~ +70 ̊C Shenzhen Kexin Wireless Technology Co., Ltd. Address: Building H, Yongli Industrial Zone, Shabei Hongli, Baolong Street, Longgang District, Shenzhen, China Antenna Size and Photos Shenzhen Kexin Wireless Technology Co., Ltd. Address: Building H, Yongli Industrial Zone, Shabei Hongli, Baolong Street, Longgang District, Shenzhen, China Test Plot: @433 MHz

Page 1 of 2 Report No.: 8133EU012003W-AA ANNEX A TEST SETUP PHOTOS PHOTO 1 Conducted Emission PHOTO 2 Radiated Emission (Below 1GHz) Page 2 of 2 Report No.: \8133EU012003W-AA PHOTO 3 Radiated Emission (Below 1GHz) --- End ---