OUECST3CST3

Scan QR Code or visit us at https://www.paulcbuff.com/CyberSync- Trigger-Transmitter-3.html for more info on how to use your new CyberSync Transmitter! WHAT’S IN THE BOX?! MEET YOUR NEW BEST FRIEND Buttons, Screens, and Ports 1) Power to turn your remote on and off 2) Test to fi re a test fl ash 3) Menu to access frequency, display brightness, and your transmitter’s sleep timer 4) Two arrow buttons adjust currently displayed setting Frequency & Battery Life Sleep Timer Screen Brightness Test Flash There are two ports on the CST3. A USB-C charging port*, as well as a 3.5mm sync jack *USB-C to USB-A cable included in box FCC ID: OUECST3 FCC INFORMATION 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 guaran- tee 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 Warning: Changes or modifications to this unit not expressly approved by the part responsible for compliance could void the user’s authority to operate the equipment. FCC Radiation Exposure Statement The device has been evaluated to meet general RF exposure requirement The device can be used in portable exposure condition without restriction. 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.

C5266091_X8_Ed.1 1/1 Letter of Authorization Company: Paul C. Buff, Inc. Address: 2725 Bransford Ave., Nashville, TN 37204, USA Product Name: CST3 Model Number: CST3 FCC Identifier: OUECST3 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Brian Lennon Date: 04/21/2022 Title: Technical Director Signature of applicant:

C5266091_X10_Ed.1 1/1 Paul C. Buff, Inc. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 04/21/2022 Subject: Request for Confidentiality FCC ID: OUECST3 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality ID Label/Location No No Attestation Statement No No External Photos No Block Diagram Schematics Test Report No No Test Setup Photos No User’s Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Brian Lennon Title: Technical Director

FCC ID: OUECST3 Page 4 of 9 External photos FCC ID: OUECST3 Page 5 of 9 FCC ID: OUECST3 Page 6 of 9

Label & Location Location

FCC ID: OUECST3 Page 7 of 9 Internal photos FCC ID: OUECST3 Page 8 of 9 RF Antenna RF Chip FCC ID: OUECST3 Page 9 of 9

Report No.: NTC2203248FV00 Page 2 of 28 Table of Contents 1. Summary of Test Result ...................................................................................................................................... 4 2. General Description of EUT ................................................................................................................................ 5 3. Test Channels and Modes Detail ........................................................................................................................ 7 4. Configuration of EUT ........................................................................................................................................... 7 5. Modification of EUT ............................................................................................................................................. 7 6. Description of Support Device............................................................................................................................. 8 7. Test Facility and Location ................................................................................................................................... 8 8. Applicable Standards and References................................................................................................................ 9 9. Deviations and Abnormalities from Standard Conditions ................................................................................... 9 10. Test Conditions ................................................................................................................................................. 9 11. Measurement Uncertainty ............................................................................................................................... 10 12. Sample Calculations ....................................................................................................................................... 11 13. Duty Cycle ....................................................................................................................................................... 12 14. Test Items and Results ................................................................................................................................... 13 14.1 Conducted Emissions Measurement ............................................................................................................ 13 14.2 Radiated Spurious Emissions and Restricted Bands Measurement ............................................................ 17 14.3 20dB Bandwidth Measurement ..................................................................................................................... 25 14.4 Antenna Requirement ................................................................................................................................... 27 15. Test Equipment List ........................................................................................................................................ 28 Report No.: NTC2203248FV00 Page 3 of 28 Revision History Report Number Description Issued Date NTC2203248FV00 Initial Issue 2022-04-21 Report No.: NTC2203248FV00 Page 4 of 28 1. Summary of Test Result FCC Rules Description of Test Result Remarks §15.207 (a) AC Power Conducted Emission PASS --- §15.249(a)/ 15.209 Radiated Emissions PASS --- §15.249(d)/ 15.205 Band Edge PASS --- §15.215(c) 20dB Bandwidth PASS --- §15.203 Antenna Requirement PASS --- Report No.: NTC2203248FV00 Page 5 of 28 2. General Description of EUT Product Information Product name: CST3 Main Model Name: CST3 Additional Model Name: N/A Model Difference: N/A S/N: 2203-1036 Brand Name: Hardware version: Not Stated Software version: Not Stated Rating: DC 5V come from USB port DC 3.7V come from internal battery Typical arrangement: Table-top I/O Port: N/A Accessories Information Adapter: N/A Cable: N/A Other: N/A Additional information Note: N/A Remark: All the information above are provided by the manufacturer. More detailed feature of the EUT please refers to the user manual. Report No.: NTC2203248FV00 Page 6 of 28 Technical Specification (2.4G Function ) Frequency Range: 2427-2457MHz Modulation Type: GFSK Number of Channel: 16 (refer to following channel list for details) Antenna Type: Chip antenna Antenna Gain: 0 dBi (Declared by manufacturer) Channel List Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) 1 2427 7 2439 13 2451 2 2429 8 2441 14 2453 3 2431 9 2443 15 2455 4 2433 10 2445 16 2457 5 2435 11 2447 6 2437 12 2449 Report No.: NTC2203248FV00 Page 7 of 28 3. Test Channels and Modes Detail Mode Channel Frequency (MHz) Modulation Data Rate (Mbps) 1 TX Low 1 2427 GFSK 1 2 TX Mid 9 2443 GFSK 1 3 TX High 16 2457 GFSK 1 4. Normal Mode --- --- --- --- --- Note: TX mode means that the EUT was programmed to be in continuously transmitting mode. 4. Configuration of EUT 5. Modification of EUT No modifications are made to the EUT during all test items. EUT EUT Adapter AC Mains Report No.: NTC2203248FV00 Page 8 of 28 6. Description of Support Device The EUT has been tested as an independent unit together with other necessary accessories or support units. The following support units or accessories were used to form a representative test configuration during the tests. No. Equipment Brand M/N S/N Cable Specification Remarks 1. Adapter HUAWEI HW-050200 C01 --- --- Provided by the Lab. 7. Test Facility and Location Test Site : Dongguan Nore Testing Center Co., Ltd. (Dongguan NTC Co., Ltd.) Accreditations and Authorizations : The Laboratory has been assessed and proved to be in compliance with CNAS/CL01 Listed by CNAS, August 13, 2018 The Certificate Registration Number is L5795. The Certificate is valid until August 13, 2024 The Laboratory has been assessed and proved to be in compliance with ISO17025 Listed by A2LA, November 01, 2017 The Certificate Registration Number is 4429.01 Listed by FCC, Nove…

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FCC ID: OUECST3 Page 1 of 9 Test Photo Radiated emission (Below 30MHz) FCC ID: OUECST3 Page 2 of 9 Radiated emission (30-1000MHz) Radiated emission (Above 1000MHz) FCC ID: OUECST3 Page 3 of 9 Conducted emission