XYFTDMR2409Radio System

Manual for TD MX RF Module Information： 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 communication. Outline: Specification： Operating Voltage Range：DC 5.0V Operating Temperature : ‐10°C~60°C（ 14°F~140°F） Number of chan ne ls：47 CH (2.4GHz）&43CH（900MHz ） Frequency band: 2.4GHz&900MHz 2.4GHz :2403.985-2472.985 MHz RF Power :20dBm 900MHz：904~925MHz RF Power:14dBm Antenna gain: Single-band Antenna 1 & Single-band Antenna 3:2.0 dBi, Omni Antenna 2: 4.0 dBi Compatible: ACCESS Receiver&ACCST receivers for 2.4 GHz band (TD series Receiver) Features: Supported by the new developed ETHOS system Multi ‐ language switching function Support ACCESS & ACCST protocol Supports 2.4GHz &900MHz dual frequency Interface definition VMAIN_EXT: connect to radio main board GND: connect to radio GND NC: Reserved pin MAIN RX/TX: connect to radio USART S.PORT: connect to radio S.port port IntRF_RXO/TXO: Connect to radio USART 5.RF exposure considerations 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 N/A 4.Trace antenna design N/A 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 OEM’s 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 . 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…

Text truncated - open the document above for the full version.

Company Name: FrSky Electronic Co., Ltd . Add: F-4, Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125, Jiangsu, China Tel: +86-0510-826 06377 Fax: +86-0510-82608677 E-mail: [email protected] 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 Commission’s Rules, FrSky Electronic Co., Ltd. hereby requests long-term confidential treatment of information accompanying this application as outlined below: Block Diagram Schematics Operation Description 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. Sincerely Yours, Signature: Typed or Printed Name: Bryan Shao Title: Manager

Applicant FrSky Electronic Co., Ltd. FCC ID: XYFTDMR2409 Section 15.212 Modular Transmitters Request for Modular Approval Request for Limited Modular Approval  RequirementsEUT ConditionsComply(Y/N) Single Modular Approval Requirements 1 The radio elements of the modular transmitter must have their own shielding. The physical crystal and tuning capacitors may be located external to the shielded radio elements. Refer to external photos. This module has shield cover. Y 2 The modular transmitter must have buffered modulation/data inputs (if such inputs are provided) to ensure that the module will comply with part 15 requirements under conditions of excessive data rates or over‐modulation. All inputs to the modules are buffered through logic or microprocessor inputs. Refer to Schematics. Y 3 The modular transmitter must have its own power supply regulation. The Module uses the chip FrRF2408 and SX1279 with built-in power management components, the module r ated power is 5.0V power, Refer to schematics. Y 4 The modular transmitter must comply with the antenna and transmission system requirements of §§15.203, 15.204(b) and 15.204(c). The antenna must either be permanently attached or employ a “unique” antenna coupler (at all connections between the module and the antenna, including the cable). The “professional installation” provision of §15.203 is not applicable to modules but can apply to limited modular approvals under paragraph (b) of this section. 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. Y 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: [email protected] 5 The modular transmitter must be tested in a stand‐alone configuration, i.e., the module must not be inside another device during testing for compliance with part 15 requirements. Unless the transmitter module will be battery powered, it must comply with the AC line conducted requirements found in §15.207. AC or DC power lines and data input/output lines connected to the module must not contain ferrites, unless they will be marketed with the module (see §15.27(a)). The length of th ese lines shall be the length typical of actual use or, if that length is unknown, at least 10 centimeters to insure that there is no coupling between the case of the module and supporting equipment. Any accessories, peripherals, or support equipment connected to the module during testing shall be unmodified and co mmercially available (see §15.31(i)). The modular transmitter is connected to the controlled board when testing. Please refer to setup photo. Y 6 If using a permanently affixed label, the modular transmitter must be labeled with its own FCC identification number, and, if the 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 installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following:“ContainsTransmitter Module FCC ID: XYFTDMR2409”Any similarwording that expresses the same meaning may be used. The Grantee may either provide such a label, a n example of which must be included Refer to the label. Y in the application for equipment authorization, or, must provide adequate instructions along with the module which explain this requirement. In the latter case, a copy of these instructions must be included in the application for equipment authorization. 7 The modular transmitter must comply with any specific rules or operating requirements that ordinarily apply to a complete transmitter and the manufacturer must provide adequate instructions along with the module to explain any such requirements. A copy of these instructions must be included in the application for equipment authorization. Refer to manual Y 8 Y The modular transmitter must comply with any applicable RF exposure requirements in its final configuration. 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 Signature: Typed or Printed Name: Bryan Shao Title: Manager

EXHIBIT A - EUT EXTERNAL PHOTOGRAPHS 900MHz SRD Antenna 2 2Antenna 1 900MHz SRD Antenna 1 Antenna 2 2.4G SRD Antenna 1 2.4G SRD Antenna 3 2.4G SRD Antenna 2 900MHz SRD Antenna 2&2.4GHz SRD Antenna 2: 900MHz SRD Antenna 1: 2.4GHz SRD Antenna 1: 2.4GHz SRD Antenna 3:

40mm 25mm

EXHIBIT B - EUT INTERNAL PHOTOGRAPHS

Bay Area Compliance Laboratories Corp. (Kunshan) Report No.: RSHD201102003-00A FCC Part 15.247 Page 11 of 54 FCC §1.1310 & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE) Applicable Standard According to subpart 15.247 (i) and subpart 1.1310, 2.1091 systems operating under the provisions of this section shall be operated in a manner that ensures the public is not exposed to RF energy level in excess of the communication guidelines. Limits for General Population/Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Averaging Time (minutes) 0.3-1.34 614 1.63 *(100) 30 1.34-30 824/f 2.19/f *(180/f²) 30 30-300 27.5 0.073 0.2 30 300-1500 / f/1500 30 1500-100,000 / 1.0 30 f = frequency in MHz; * = Plane-wave equivalent power density Calculated Formulary: Predication of MPE limit at a given distance S = PG/4πR² = power density (in appropriate units, e.g. mW/cm 2 ); P = power input to the antenna (in appropriate units, e.g., mW); G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor, is normally numeric gain; R = distance to the center of radiation of the antenna (appropriate units, e.g., cm); For simultaneously transmit system, the calculated power density should comply with: Bay Area Compliance Laboratories Corp. (Kunshan) Report No.: RSHD201102003-00A FCC Part 15.247 Page 12 of 54 Calculated Data (worst case): Mod e Frequency Range (MHz) Maximum Antenna Gain Tune-up Conducted Power Evaluatio n Distance (cm) Power Density (mW/cm 2 ) MPE Limit (mW/cm 2 ) MPE ratio (dBi) (numeri c) (dBm) (mW) SRD 904-925 4.00 2.51 14.00 25.12 20 0.0125 0.60 0.0209 2403.985-2472.985 4.00 2.51 20.00 100.00 20 0.0499 1.00 0.0499 Note: (1) The Tune-up output power was declared by the Manufacturer. (2) 2.4G SRD and 900MHz SRD can transmit simultaneously, the worst condition as below: =0.0209+0.0499=0.07<1.0 Conclusion: The EUT meets exemption requirement- RF exposure evaluation greater than 20cm distance specified in § 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.

FCC PART 15.247 TEST REPORT For FrSky Electronic Co., Ltd. F-4, Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125, Jiangsu, China FCC ID: XYFTDMR2409 R e p o r t T y p e: O r i gi n a l R e p o r t P r o d u c t T y p e : R a d i o s ys t e m Project Engineer: Tyrone Wang Report Number: RSHD201102003-00A Report Date: 2021-01-08 Reviewed By: Oscar Ye EMC Manager Prepared By: Bay Area Compliance Laboratories Corp. (Kunshan) No.248 Chenghu Road,Kunshan,Jiangsu province,China Tel: +86-0512-86175000 Fax: +86-0512-88934268 www.baclcorp.com.cn Bay Area Compliance Laboratories Corp. (Kunshan) Report No.: RSHD201102003-00A FCC Part 15.247 Page 2 of 54 TABLE OF CONTENTS GENERAL INFORMATION ....................................................................................................................................... 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 4 OBJECTIVE ................................................................................................................................................................... 4 RELATED SUBMITTAL(S)/GRANT(S) ............................................................................................................................. 4 TEST METHODOLOGY .................................................................................................................................................. 4 MEASUREMENT UNCERTAINTY .................................................................................................................................... 5 TEST FACILITY ............................................................................................................................................................. 5 SYSTEM TEST CONFIGURATION .......................................................................................................................... 6 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 6 EUT EXERCISE SOFTWARE .......................................................................................................................................... 7 SPECIAL ACCESSORIES ................................................................................................................................................. 7 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 7 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 7 EXTERNAL I/O CABLE.................................................................................................................................................. 7 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 7 SUMMARY OF TEST RESULTS ............................................................................................................................... 9 TEST EQUIPMENT LIST ......................................................................................................................................... 10 FCC §1.1310 & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE) ........................................................ 11 FCC §15.203 – ANTENNA REQUIREMENT .......................................................................................................... 13 APPLICABLE STANDARD ............................................................................................................................................ 13 ANTENNA INFORMATION ........................................................................................................................................... 13 FCC §15.205, §15.209 & §15.247(d) – RADIATED EMISSIONS ........................................................................... 18 APPLICABLE STANDARD ............................................................................................................................................ 18 EUT SETUP ................................................................................................................................................................ 18 EMI TEST RECEIVER & SPECTRUM ANALYZER SETUP .............................................................................................. 19 TEST PROCEDURE ...................................................................................................................................................... 19 CORRECTED AMPLITUDE & MARGIN CALCULATION ................................................................................................. 19 TEST RESULTS SUMMARY .......................................................................................................................................... 19 TEST DATA ................................................................................................................................................................ 20 FCC §15.247(a) (1)-CHANNEL SEPARATION TEST ........................................................................................... 37 APPLICABLE STANDARD ............................................................................................................................................ 37 TEST PROCEDURE ...................................................................................................................................................... 37 TEST DATA ................................................................................................................................................................ 37 FCC §15.247(a) (1) – 20 dB EMISSION BANDWIDTH ..............................................…

Text truncated - open the document above for the full version.

EXHIBIT C - TEST SETUP PHOTOGRAPHS Conducted Emissions (Front View) Conducted Emissions (Side View) Radiated Spurious Emissions Test View (Below 1GHz) Radiated Spurious Emissions Test View (Above 1GHz)