2BG7KSKY3000LUHF Liquid Cooled Digital TV Transmitter

SKY3000L Transmitter and SKY1500L Transmitter Operating & Troubleshooting Manual Revision C 7 2024 Jimyung Communications Co.,Ltd.(JM broadcast ) A-907 Technopark, 697 Pangyo-ro, Bundang-gu, Seongnam-si, 13511, Korea Tel. +82-31-706-0150 Fax. +82-31-707-6382 Email : [email protected] Web : www.jmbroadcast.com The comparisons and other information provided in this document have been prepared in good faith based on publicly available information. The reader is encouraged to consult the respective manufacturer's most recent published data for verification. ATSC Transmitter 1 JM Broadcast Index 1. SYSTEM CONFIGURATION ............................................................... 10 1.1 Diagram ...................................................................................................................... 10 1.1.1. 3kW Transmitter ............................................................................................................... 10 1.2. Main Components .................................................................................................... 12 1.2.1. Exciter ............................................................................................................................... 12 1.2.2. HPA.................................................................................................................................... 12 1.2.3. TCU(Transmitter Control Unit ) ....................................................................................... 13 1.2.4. Cooling System ................................................................................................................ 13 2. SYSTEM DESCRIPTION .................................................................... 14 2.1. Description ............................................................................................................... 14 2.1.1. System Diagram ............................................................................................................... 14 2.1.2. System Configuration ...................................................................................................... 15 2.1.3 Cooling Methods ............................................................................................................... 15 2.1.4. Feature .............................................................................................................................. 15 2.1.5. System Specifications ..................................................................................................... 18 2.1.6. Specifications of Unit ...................................................................................................... 19 2.1.6.1. Exciter ......................................................................................................................................... 19 2.1.6.2. HPA1600L ................................................................................................................................... 19 2.1.6.3. HPA1600L Power Supply .......................................................................................................... 19 2.1.6.4. Band Pass Filter ......................................................................................................................... 20 2.1.6.5. Main Power Distribution ............................................................................................................ 20 2.1.6.6. Liquid Cooling System .............................................................................................................. 20 2.2. System Installation .................................................................................................. 21 2.2.1 Transmitter Installation .................................................................................................... 21 2.2.1.1. Transmitter RF Connection ....................................................................................................... 21 2.2.1.2 Transmitter AC Connection ....................................................................................................... 22 2.2.1.3. Transmitter Data Cable Connection ......................................................................................... 22 2.2.1.4. Transmitter Water Hose Connection ........................................................................................ 22 2.2.3. Liquid Cooling System Installation ................................................................................ 23 2.2.3.1. Heat Exchanger.......................................................................................................................... 23 2.2.3.1.1. Heat Exchanger AC Connection ........................................................................................... 23 2.2.3.1.2. Heat Exchanger Controller Data Cable Connection .............................................................. 24 2.2.3.1.3. Water Hose Outdoor Installation ........................................................................................... 24 ATSC Transmitter 2 JM Broadcast 3. FIRST TIME ON-AIR. .......................................................................... 25 3.1. AC Power Supply ..................................................................................................... 25 3.1.1. AC Power Check .............................................................................................................. 25 3.2. Change Frequency. .................................................................................................. 25 3.3. Change RF Set Power. ............................................................................................. 25 3.4. TX-ON. ....................................................................................................................... 26 4. ALARM MANUAL. .............................................................................. 26 4.1. VSWR ..................................…

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CKC Certification Services, LLC CB: US0103; NB/AB: 0976 5046 Sierra Pines Drive Mariposa, CA 95338 Phone: 1 800-500-4EMC (4362) Fax: 209-787-5568 Email: [email protected] APP-FCC-A Page 1 of 2 Rev 3 APP-FCC-A Applicant Attestation Applicant Information Company Name: Jinmyung Communications.co.,Ltd. Contact Name: Haesoo Kim Contact Title: General Manager Company Address: A-907 TECHNOPARK 697 PANGYO ST. BUNDANG SEONGNAM 13511 KOREA Telephone No: +82 31 706 0150 Facsimile No: +82 31 707 6126 Email Address: [email protected] Certification Type / Equipment Identification Certification Program: FCC Equipment Authorization / Radio Certification Certification Number: FCC ID: 2BG7KSKY3000L The equipment identified above ☐ is / ☒ is not “covered” equipment prohibited from receiving an equipment authorization pursuant to 47 CFR Part 2, Subpart J, §2.903. The applicant identified above ☐ is / ☒ is not identified on the FCC’s “Covered List” as an entity, affiliate, or subsidiary which produces equipment on the “Covered List” or identified as an entity which has rebranded or relabeled equipment produced by entities identified on the “Covered List.” I hereby attest and certify that the above statements are true and correct. Signature of Authorized Individual: 1 Printed Name: Joong-Il Kim Title of authorized signature: CEO/President Date 7/10/2024 Note this attestation shall be signed by the applicant or their direct appointee within the same legal entity. A third party agent is not permitted to sign on behalf of the applicant. 1 Signature is not subject to the FCC’s authorized individual policy ( KDB 852134) and may be signed by any appropriate company official. CKC Certification Services, LLC CB: US0103; NB/AB: 0976 5046 Sierra Pines Drive Mariposa, CA 95338 Phone: 1 800-500-4EMC (4362) Fax: 209-787-5568 Email: [email protected] APP-FCC-A Page 2 of 2 Rev 3 Attachment A – Additional Information The FCC’s “Covered List” includes certain “telecommunications equipment” and “video surveillance equipment” produced by specific manufacturers, their Affiliates or Subsidiaries and including any products produced by these entities which are rebranded or relabeled by other entities. (191, 184, 185, 188) 2 The FCC claims the identified equipment poses an unacceptable risk to United States national security. Telecommunications Equipment (195) : Any equipment used in fixed or mobile networks that provides advanced communications service, provided the equipment includes or uses electronic components, as defined under section 1.50001(c). Video Surveillance Equipment (205) : Any equipment that is used in fixed and mobile networks that provides advanced communications service in the form of a video surveillance service, provided the equipment includes or uses electronic components. Advanced Communications Service (195, 205) Any equipment that can be used in such a fixed or mobile broadband network to enable users to originate and receive high quality voice, data, graphics, and video telecommunications service using any technology with connection speeds of at least 200 kbps in either direction. Affiliate (183) : An entity that (directly or indirectly) owns or controls, is owned or controlled by, or is under common ownership or control with, another entity, where the term “own” means to have, possess, or otherwise control an equity interest (or the equivalent thereof) of more than 10 percent. Subsidiary (184) : Any entity in which such named entity directly or indirectly (1) holds de facto control or (2) owns or controls more than 50% of the total voting power of the entity’s outstanding voting stock. Useful Links: FCC Covered List https://www.fcc.gov/supplychain/coveredlist 47 CFR Part 2 Subpart J (including 2.903 and 2.911) https://www.ecfr.gov/current/title-47/chapter-I/subchapter-A/part-2/subpart-J FCC KDB System: https://apps.fcc.gov/oetcf/kdb/index.cfm FCC Report and Order 22-84 https://docs.fcc.gov/public/attachments/FCC-22-84A1.pdf 2 Parenthetical references are citations of paragraph numbers in FCC Report and Order FCC 22-84 (ET Docket 21.232).

Attestation For Applicant/ ECMprrEntMarUactu^lrifarrTBtion Applicant Attestation Company Name Jinm/ungCorrrrunicationsCo, ltd Grantee code2BG7K FRNdO-DigtNurrbeb: 0034937888 The undersigiec applicant hereto/ consents: a) tothedesigTationofthehereinnamEdUSAgentforServicBofProcess;and b) to accept responsibility and oblation to maintain a US Agent for Service of Process for no less than one year after either all marketing and importation of the applicable equipment within the U.S has been permanently terminated, or the condusion of ary Conrrissicn-related achinistrative or judaal proceed ng involving the equipment, whichever is later; and d to promptly update the US Agent for Service of Prooess information on file with the FCC in accordance with 47 CFR 2.929 in the a/ent any Change occurs in either the named entity or the named entity's contact information. Sigrature of Applicant: " Printed Name: JOOnc-IIKirr Date 5/13/2024 US AgErtfcr Service of Recess Information Agent for Seruce of Recess Attestation Company Name Over The Air RF consulting LLC Contact Nane James Stenberg Contact Title Principal Engneer Physical Address: 25StroudwaterRd Portland, ME 04102 USA Mailing Adctess: same as above Telephone No 207-632-8973 Facsimile Na 207-632-8973 Email Actress: [email protected] FRNdO-DigtNurrben 1 : 0035421841 * Expiration date is not permitted. The undersigned attests that the named party is a valid le® I US entity with a valid legal US presence and as the delected US Agent for Service of Process hereto/ consents: a) to acknowledges and accepts responsibility to act as United States Agent for service of Prooess on behalf of the applicant identified above; and b) to accept service of process in the US for matters related to the applicable equi prrent and at the physical adchess and email adchess identified herein on behalf of the applicant identified above for equipment authorization applications under certification pursuant to 47 CFR Part 2 Submit J. SigratureoF US Agent: FrintedNarreJames TStertaerc Date*: 5/13/2024 1 frn is mandatory \Maen tne US Agent for Service of Process has an easting FRN. CKCCSPUBFCC AFSOPV4

JINMYUNG Jinmyung Communications Co., Ltd. A-907 Techno Park, 697 Pangyo-ro, Pundang-gu, Seongnam-si 13511 Korea TEL +82-31-706-0150 FAX +82-31-707-6126 [email protected], [email protected] Certified ISO 9001 Acknowledgement Jinmyung Communications Co., Ltd. acknowledge that the Modifications in CKC Laboratories Report 10928-12 or an Equivalent Implementation will be applied to each Product marketed in the U.S.A. July 10th. 2024 CWE ERTIFY THAT: THE INFORMATION ON THIS DOCUMENT IS TRUE AND ACCURATE AND I ASSUME THE RESPONSIBILITY FOR PROVING SUCH REPRESENTATIONS, I UNDERSTAND THAT I AM LIABLE FOR ANY FALSE STATEMENTS OR MATERIAL OMISSIONS MADE ON OR IN CONNECTION WITH THIS DOCUMENT; THIS CERTIFICATE CONSISTS OF ONE PAGES, INCLUDING ALL ATTACHMENTS.

TEXT FCC ID: 2BE2WSKY3000L This device complies with Part 15 of 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. FCC ID: 2BG7KSKY3000L This device complies with Part 15 of FCC Rules. Operation is subject to the condition that this device does not cause harmful interference.

LP100045_RFX MPE Report Form_Rev10 RADIO FREQUENCY EXPOSURE REPORT FOR THE Low Power Television Transmitter Model: Sky3000L* *(See Appendix C for Manufacturer Declaration) Report No.: 109281-15 Date of issue: April 2, 2024 PREPARED FOR: Jinmyung Communications A-907 Technopark, 697 Pangyo-ro, Bundang-gu, Seongnam-si, 13511, Korea PREPARED BY: E. Wong CKC Laboratories, Inc. 5046 Sierra Pines Drive Mariposa, CA 95338 The test data contained in this report documents the observed testing parameters pertaining to and are relevant for only the sample equipment tested in the agreed upon operational mode(s) and configuration(s) as identified herein. Compliance assessment remains the client’s responsibility. This report may not be used to claim product endorsement by A2LA or any government agencies. This test report has been authorized for release under quality control from CKC Laboratories, Inc. Steve Behm Director of Quality Assurance & Engineering Services CKC Laboratories, Inc. Page 2 of 14 Report No: 109281-15 Purpose: To demonstrate compliance with United States, Canada, Australia, New Zealand, European Union and/or United Kingdom RF Exposure requirements for Portable equipment (devices used ≤20cm from the body) with power output below exemption levels or Mobile equipment (devices used >20cm from the body) where Maximum Permissible Exposure (MPE) Calculations apply. Device and Antenna Operating Configuration: Device operating at maximum output power with continuous transmission of modulated data. Method: This equipment is evaluated in accordance with the guidelines set forth in 47 CFR 1.1310, KDB 447498 & ANSI C95.1 for the US, Health Canada Safety Code 6 & RSS 102 for Canada, ARPANSA RPS S-1 for AU & NZ and EN 62479 or EN 62311 for EU and UK. Other Considerations: Report considers stand-alone equipment configurations only. RF Exposure limits are calculated at the mid-point of each operating band Referenced Test Reports: The following test reports were referenced in conjunction with this assessment: 109281-12 Decision Rule: Outcome of RF exposure assessment is listed in the comment section(s) below as a binary statement for simple acceptance rule according to ILAC-G8 (2019). Page 3 of 14 Report No: 109281-15 RF Exposure Mobile Equipment Assessment Power Density Calculations (Single Transmitter, Stand Alone) MPE Calculation: 푃푃푃푃푃푃푃푃푃푃 퐷퐷푃푃퐷퐷퐷퐷퐷퐷퐷퐷퐷퐷 ( 푆푆 ) = 퐸퐸퐸퐸퐸퐸퐸퐸 4휋휋 푑푑 2 Given: EIRP in mW or W and d in cm or m US MPE Assessment Power Reported is: ☐ Peak ☒ Average Limit Used is: ☒ General Population ☐ Occupational Exposure Operating Band MHz Power dBm Ant Type/Gain dBi EIRP dBm Distance cm MPE mW/cm 2 Limit mW/cm 2 Comment 599 64.8 0 64.8 775 0.4 0.4 Pass Calculation based on rated power of 3000W/64.8dBm Antenna structure will be located in specific structure, RF exposure compliance will be re-evaluated at the time of licensing. Summary: Exemptions: Equipment demonstrating compliance by portable RF exposure exemption have been evaluated, without further testing, for use under either portable or mobile RF exposure configurations. Additional configurations including collocation or simultaneous transmission with other transmitters (including necessary separation distances) are subject to further assessment. Certain exemption criteria may define specific separation distances. It is assumed that the manufacturer shall design the equipment such that these minimum separation distance is met. MPE Calculation Results: Equipment demonstrating compliance with MPE calculations have been evaluated, without further testing, for use under mobile RF exposure configurations as identified herein. Additional configurations including collocation or simultaneous transmission with other transmitters (including necessary separation distances) are subject to further assessment. It is assumed that the manufacturer shall design the equipment such that the minimum separation distance of 20cm (or greater, as listed above) is met or that the manufacturer provides a protection guide (e.g. installation instructions) to the end user such that the antenna(s) may be installed in accordance with the manufacturer’s instructions in such a manor to maintain the minimum separation distance. Page 4 of 14 Report No: 109281-15 General Comments: The absorption and distribution of Electromagnetic energy in the body is a very complex phenomena that depends on the mass, shape and physiological condition of the body; the orientation of the body with respect to the fields; and, the electrical properties of the body and the environment. Variables that may play a substantial role in possible biological effects are those that characterize the environment (including but not limited to: ambient temperature, air velocity, relative humidity and body insulation); and those that characterize the individual (including but not limited to: age, gender, activity level and existing debilitation or disease). Because innumerable factors may interact to determine specific biological effects of exposure to electromagnetic fields, any protection guide should consider both intended and unintended operational environments and provide guidance for installation and use of the equipment such that proper separation distances can be maintained. (ANSI C95.1) Page 5 of 14 Report No: 109281-15 APPENDIX A - RF Exposure Limits United States Compliance Requirements (1.1310): RF Exposure Evaluation Limits Occupational / Controlled Exposure Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Averaging Time (minutes) 0.3-3.0 614 1.63 *(100) < 6 3.0-30 1842 / f MHz 4.89 / f MHz *(900 / f MHz 2 ) < 6 30-300 61.4 0.163 1 < 6 300-1500 -- -- f MHz / 300 < 6 1500-100,000 -- -- 5.0 < 6 RF Exposure Evaluation Limits 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…

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This report contains a total of 49 pages and may be reproduced in full only. Partial reproduction may only be done with the written consent of CKC Laboratories, Inc. Jinmyung Communications REVISED EMC TEST REPORT TO 109281-12 Low Power Television Transmitter Model: Sky3000L* *(See Appendix A for Manufacturer Declaration) Tested to The Following Standards: SpecLimit FCC Part 74 Subpart G Report No.: 109281-12A Date of issue: June 18, 2024 This test report bears the accreditation symbol indicating that the testing performed herein meets the test and reporting requirements of ISO/IEC 17025 under the applicable scope of testing for CKC Laboratories, Inc. We strive to create long-term, trust based relationships by providing sound, adaptive, customer first testing services. We embrace each of our customers’ unique EMC challenges, not as an interruption to set processes, but rather as the reason we are in business. Test Certificate # 803.01 Page 2 of 49 Report No.:109281-12A TABLE OF CONTENTS Administrative Information .......................................................................................................................... 3 Test Report Information ............................................................................................................................................ 3 Revision History ......................................................................................................................................................... 3 Report Authorization ................................................................................................................................................. 3 Test Facility Information ............................................................................................................................................ 4 Software Versions ...................................................................................................................................................... 4 Site Registration & Accreditation Information .......................................................................................................... 4 Summary of Results ................................................................................................................................................... 5 Standard / Specification: FCC Part(s) 74 Subpart G ............................................................................................... 5 Modifications During Testing ..................................................................................................................................... 6 Conditions During Testing ......................................................................................................................................... 6 Equipment Under Test (EUT) ..................................................................................................................................... 7 General Product Information: ................................................................................................................................... 7 FCC Part 74 Subpart G ................................................................................................................................. 12 74.735(b)(2) Power Limitation ................................................................................................................................. 12 74.794(a)(2)(ii) Occupied Bandwidth / Stringent Mask ........................................................................................... 16 74.794(a)(2)(ii) Spurious Emissions at Antenna Terminal ....................................................................................... 21 74.794(a)(2)(ii) Field Strength of Spurious Radiation .............................................................................................. 27 74.794(b)(1) Radio Navigation Satellite Service Bands (GPS) .................................................................................. 35 74.95(b)(4) Frequency Tolerance ............................................................................................................................ 38 Appendix A: Manufacturer Declaration ...................................................................................................... 42 Appendix B: Modifications Made During Testing ....................................................................................... 43 Supplemental Information .......................................................................................................................... 48 Measurement Uncertainty ...................................................................................................................................... 48 Emissions Test Details .............................................................................................................................................. 48 Page 3 of 49 Report No.:109281-12A Administrative Information Test Report Information REPORT PREPARED FOR: REPORT PREPARED BY: Jinmyung Communications A-907 Technopark, 697 Pangyo-ro, Bundang-gu, Seongnam-si, 13511, Korea Lisa Bevington CKC Laboratories, Inc. 5046 Sierra Pines Drive Mariposa, CA 95338 Representative (s): Jinmyung Communications – Haesoo Kim JS Engineering – Jim Stenberg Project Number: 109281 Customer Reference Number: ACH 2-7-24 DATE OF EQUIPMENT RECEIPT: March 11, 2024 DATE(S) OF TESTING: March 11-16 & 18-21, 2024 Revision History Original: Testing of Low Power Television Transmitter, Model: Sky3000L to FCC Part 74 Subpart G. Revision A: Update General Product Information Nominal Input Voltage. Moved the 99% BW plot to correct section page 17. Updated the Spurious Emissions at Antenna Terminal and Field Strength of Spurious Radiation Test Condition Notes. Added *Transmit frequency note to page 39. Report Authorization The test data contained in this report documents the observed testing parameters pe…

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