FCC ID: XYFTDMR2409 Radio System

Manual for TD MX RF Module TD-Module is a standalone module which supports dual band-2.4GHz and 900MHz. The module supports both ACCESS communication protocol&ACCST protocol on 2.4GHz & ACCESS protocol for 900MHz Information communication. Outline:

Interfacedefinition VMAIN_EXT:connecttoradiomainboard GND:connecttoradioGND NC:Reservedpin MAINRX/TX:connecttoradioUSART S.PORT:connecttoradioS.portport IntRF_RXO/TXO:ConnecttoradioUSART Specification OperatingVoltageRangeDC5.0V OperatingTemperature:10~6014~140 Numberofchannels47 CH (2.4GHz&43CH900MHz Frequencyband:2.4GHz&900MHz 2.4GHz:2403.985-2472.985 MHz RFPower:20dBm 900MHz904~925MHzRFPower:14dBm Antennagain:Single-band Antenna 1 & Single-band Antenna 3:2.0 dBi, Omni Antenna 2: 4.0 dBi Compatible:ACCESSReceiver&ACCSTreceiversfor2.4GHzband(TDseriesReceiver) Features:

SupportedbythenewdevelopedETHOSsystem Multilanguageswitchingfunction SupportACCESS&ACCSTprotocol Supports2.4GHz&900MHzdualfrequency OEM Guidance 1. Applicable FCC rules This module is granted by Single Modular Approval. It complies to the requirements of FCC part 15C, section 15.247 rules. 2. The specific operational use conditions This module can be supported by the new developed ETHOS system Multi language switching function The input voltage to the module is nominally 5.0V DC. The operational ambient temperature of the module is -10 to 60 degree C. Single-band Antenna and Omni Antenna are supported 3.Limited module procedures 4.Trace antenna design N/A N/A 5.RF exposure considerations This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment .This equipment should be installed and operated with minimum distance 20cm between the radiator& your body. 6. Antenna Antenna type: PCB antenna; Peak gain: 3.40dBi 7. Label and compliance information An exterior label on OEMs end product can use wording such as the following:

Contains Transmitter Module FCC ID: 2AC7Z-ESP32WROOM32E or Contains FCC ID: 2AC7Z-ESP32WROOM32E. 6. Antenna Antenna type :2.4GHz Antenna 1& Antenna 3: Single-band Antenna, Antenna 2: Omni Antenna Antenna Gain:Antenna 1 & Antenna 3:2.0 dBi, Antenna 2: 4.0 dBi Antenna type :900MHz Antenna 1: Single-band Antenna, Antenna 2: Omni Antenna Antenna Gain:Antenna 1: 1.8dBi, Antenna 2: 4.0dBi 7. Label and compliance information When the module is installed in the host device, the FCC ID/IC label must be visible through a window on the final device or it must be visible when an access panel, door or cover is easily re-moved. If not, a second label must be placed on the outside of the final device that contains the following text: Contains FCC ID: XYFTDMR2409 Contains IC: 23846-TDMR2409 The FCC ID/IC can be used only when all FCC ID/IC compliance requirements are met. 8. Information on test modes and additional testing requirements a)The modular transmitter has been fully tested by the module grantee on the required number of channels,modulation types, and modes, it should not be necessary for the host installer to re-test all the available transmitter modes or settings. It is recommended that the host product manufacturer, installing the modular transmitter,perform some investigative measurements to confirm that the resulting composite system does not exceed the spurious emissions limits or band edge limits (e.g., where a different antenna may be causing additional emissions). b)The testing should check for emissions that may occur due to the intermixing of emissions with the other transmitters, digital circuitry, or due to physical properties of the host product

(enclosure). This investigation is especially important when integrating multiple modular transmitters where the certification is based on testing each of them in a stand-alone configuration. It is important to note that host product manufacturers should not assume that because the modular transmitter is certified that they do not have any responsibility for final product compliance. c)If the investigation indicates a compliance concern the host product manufacturer is obligated to mitigate the issue. Host products using a modular transmitter are subject to all the applicable individual technical rules as well as to the general conditions of operation in Sections 15.5, 15.15, and 15.29 to not cause interference. The operator of the host product will be obligated to stop operating the device until the interference have been corrected . 9. Additional testing, Part 15 Sub part B disclaimer The final host / module combination need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device. The host integrator installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operation and should refer to guidance in KDB 996369. For host products with certified modular transmitter, the frequency range of investigation of the composite system is specified by rule in Sections 15.33(a)(1) through

(a)(3), or the range applicable to the digital device, as shown in Section 15.33(b)(1), whichever is the higher frequency range of investigation When testing the host product, all the transmitters must be operating.The transmitters can be enabled by using publicly-

available drivers and turned on, so the transmitters are active. In certain conditions it might be appropriate to use a technology-specific call box (test set) where accessory 50 devices or drivers are not available. When testing for emissions from the unintentional radiator, the transmitter shall be placed in the receive mode or idle mode, if possible. If receive mode only is not possible then, the radio shall be passive (preferred) and/or active scanning. In these cases, this would need to enable activity on the communication BUS (i.e., PCIe, SDIO, USB) to ensure the unintentional radiator circuitry is enabled. Testing laboratories may need to add attenuation or filters depending on the signal strength of any active beacons (if applicable) from the enabled radio(s). See ANSI C63.4, ANSI C63.10 and ANSI C63.26 for further general testing details. The product under test is set into a link/association with a partnering device, as per the normal intended use of the product. To ease testing, the product under test is set to transmit at a high duty cycle, such as by sending a file or streaming some media content. FCC Statement Any Changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. 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. This equipment complies with ISED radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20 cm between the radiator& your body.This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. ISED RSS Warning/ISED RF Exposure Statement ISED RSS Warning:

This device complies with Innovation, Science and Economic Development Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d'ISED applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. ISED RF exposure statement:

This equipment complies with ISED radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Le rayonnement de la classe b repecte ISED fixaient un environnement non contrls.Installati on et mise en uvre de ce matriel devrait avec changeur distance minimale entre 20 cm ton corps.Lanceurs ou ne peuvent pas coexister cette antenne ou capteurs avec dautres. 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.

Product Type:Radio system MIN: TD-Module FCC ID: XYFTDMR2409 IC: 23846-TDMR2409 LC RoHS C FrSky Electronic Co., Ltd. Made in China F-4, Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125,Jiangsu, China

Company Name: FrSky Electronic Co., Ltd. Add: F-4, Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125, Jiangsu, China Tel: +86-0510-82606377 Fax: +86-0510-82608677 E-mail: shaobo111@126.com FCC Confidential Authorization Date:2020-11-02 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: XYFTDMR2409 To: whom it may concern, In accordance with Sections 0.457 and 0.459 of the Commissions Rules, FrSky Electronic Co., Ltd. hereby requests long-term confidential treatment of information accompanying this application as outlined below:

The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Block Diagram Schematics Operation Description Sincerely Yours, Signature:

Title: Manager Typed or Printed Name: Bryan Shao

1 2 3 4 Company: FrSky Electronic Co., Ltd. Add: F-4, Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125, Jiangsu, China Tel: +86-0510-82606377 Fax: +86-0510-82608677 E-mail: shaobo111@126.com Applicant FCCID:

FrSky Electronic Co., Ltd. XYFTDMR2409 RequestforModularApproval RequestforLimitedModularApproval Section15.212ModularTransmitters Requirements EUTConditions Comply(Y/N) SingleModularApprovalRequirements The radio elements of the modular transmittermusthavetheirownshielding. The physical crystal and tuning capacitors may be located external to the shielded radioelements. Refer to external photos. Thismodule has shield cover. Y Y Y Y The modular transmitter must have buffered modulation/data inputs (if such inputs are provided) to ensure that the comply with part 15 module will of under requirements excessivedataratesorovermodulation. conditions All inputs to the modules are buffered through logic ormicroprocessorinputs. RefertoSchematics. The modular transmitter must have itsownpowersupplyregulation. The modular transmitter must comply withtheantennaandtransmissionsystem requirements of 15.203, 15.204(b) and 15.204(c). The antenna must either be permanently attached or employ a all unique connectionsbetweenthemoduleandthe antenna, cable). The installation provision of professional 15.203 is not applicable to modules but can apply to limited modular approvals underparagraph(b)ofthissection. including antenna coupler the

(at The Module uses the chip FrRF2408 and SX1279 with built-in power management components, the module rated power is 5.0V power, Refer to schematics. The modular transmitter has two single-band antennas/Omni antenna for 2.4G band and has a single-band antenna/

Omni antenna for 900MHz band, These antennas use unique coupling to the intentional radiator shall be considered sufficient to comply with the provisions of 15.203. 5 Y Themodulartransmitter isconnectedtothe controlledboardwhen testing. Pleaserefertosetup photo. part The modular transmitter must be testedinastandaloneconfiguration, i.e., the module must not be inside another device during testing for compliance 15 with requirements.Unlessthetransmitter module will be battery powered, it line must comply with the AC conducted requirements found in 15.207. AC or DC power lines and datainput/outputlinesconnectedto the module must not contain ferrites,unlesstheywillbemarketed withthemodule(see15.27(a)).The length of these lines shall be the lengthtypicalofactualuseor,ifthat least 10 is unknown, at length centimeterstoinsurethatthereisno coupling between the case of the module and supporting equipment. Any accessories, peripherals, or supportequipmentconnectedtothe testing shall be module during commercially unmodified available(see15.31(i)). and its transmitter installed must also If using a permanently affixed label, must the modular own be labeled with FCC identificationnumber,and,ifthe FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is display a label referring to the enclosed module.This exterior label can use wording such as following:ContainsTransmitterModule FCCID:XYFTDMR2409Any similarwording that expresses the same meaning may be used. The Granteemay either provide such a label, an example of which must be included the 6 Refertothelabel. Y in the application for equipment authorization, or, must provide adequateinstructionsalongwiththe module this requirement. In the latter case, a copy of these instructions must be for in included equipmentauthorization. the application explain which requirements transmitter must The modular comply with any specific rules or operating that ordinarily apply to a complete transmitter and the manufacturer must provide adequate instructions alongwiththemoduletoexplainany such requirements. A copy of these instructions must be included in the application equipment for authorization. The modular transmitter must comply with any applicable RF exposure requirements in its final configuration. 7 8 Typed or Printed Name: Bryan Shao Signature:

Title: Manager Refertomanual Y Y The EUT meets RF exposure evaluation 2.1091, If the device built into a host as a portable usage, the additional RF exposure evaluation may be required as specified by 2.1093