X4R318ATransmitter

FCC STATEMENT 1. 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. 2. 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.

JYT Enterprises P.o Box 120159 Clermont Florida 34711, USA Tel:+1-352-293-2653 Fax:+1-352-433-0604 Date: 2 010-1-11 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD FCC ID: X 4R318A To Whom It May Concern: This letter is to ascertain that JYT Enterprises, Transmitter has been the units used for conducting FCC compliance testing, the DoC part will be tested by FCC recognized test lab. If you have any question or concerns, pls. contact us. Sincerely, Julio Toledo / President JYT Enterprises P.o Box 120159 Clermont Florida 34711, US A Tel:+1-352-293-2653 Fax:+1-352-433-0604 [email protected]

SCS-F18: Project and Product Certification Representative Authorization Letter Page 1 of 2 Rev 2.0 2206 Ringwood Avenue San Jose, CA 95131 Tel: 408-526-1188 Fax: 408-526-1088 Email: [email protected] Project and Product Certification Representative Authorization Letter Revision History Reason for Amendment (current / obsolete) From To Approved Date Initial Release (current) 1.0 1.0 Nov-14-2006 Revised wording (current) 1.0 2.0 Sept–25-2007 SCS-F18: Project and Product Certification Representative Authorization Letter Page 2 of 2 Rev 2.0 JYT Enterprises P.o Box 120159 Clermont Florida 34711, USA Tel:+1-352-293-2653 Fax:+1-352-433-0604 20 10-1-11 To: SIEMIC, INC. 2206 Ringwood Avenue, San Jose, CA 95131 USA Dear Sir/Madam, Re: Project and Product Certification Representative Authorization Letter We, JYT Enterprises hereby authorize SIEMIC, INC. to act as a Certification Body for certifying for the following project(s): Transmitter, model no.: RTFC318 We affirm that between SIEMIC and JYT Enterprises, any difference in understanding, including test plan, measurement methods, applicable standards and relevant procedures and processes have been resolved prior to commencement of testing activities. Sincerely, Julio Toledo / President JYT Enterprises P.o Box 120159 Clermont Florida 34711, USA Tel:+1-352-293-2653 Fax:+1-352-433-0604 [email protected]

Schematic
Operational description
Block Diagram

SHENZHEN LCS CERTIFICATION SERVICES INC. Report No. LCS0912240562F FCC ID:X4R318A Page 1 of 1 EXTERNAL PHOTOGRAPH OF EUT Fig. 1 Fig. 2

FCC ID: X4R318A Model No. : RTFC318

SHENZHEN LCS CERTIFICATION SERVICES INC. Report No. LCS0912240562F FCC ID:X4R318A Page 1 of 1 INTERNAL PHOTOGRAPH OF EUT Fig. 1 Fig. 2

SHENZHEN LCS CERTIFICATION SERVICES INC. Report No. LCS0912240562F FCC ID:X4R318A Page 1 of 18 FCC CFR47 PART 15 SUBPART C CERTIFICATION TEST REPORT FOR JYT Enterprises Transmitter Model No.: RTFC318 FCC ID: X4R318A Prepared for : JYT Enterprises Address : P.o Box 120159 Clermont Florida 34711, USA Tel: +1-352-293-2653 Fax: +1-352-433-0604 Prepared by : SHENZHEN LCS CERTIFICATION SERVICES INC. Address : 4F., No. 120, Xijing Industrial Zone, Gushutangxi, Bao'an Road, Xixiang Town, Bao'an District, Shenzhen, China Tel: +86-755-82591330 Fax: +86-755-82591332 Report Number : LCS0912240562F Date of Test : December 24, 2009 – January 15, 2010 Date of Report : January 15, 2010 SHENZHEN LCS CERTIFICATION SERVICES INC. Report No. LCS0912240562F FCC ID:X4R318A Page 2 of 18 TABLE OF CONTENTS Description Page 1. SUMMARY OF STANDARDS AND RESULTS .......................................................................3 2. GENERAL INFORMATION ......................................................................................................4 2.1 Description of Device (EUT)................................................................................................................. 4 2.2 Test Facility ........................................................................................................................................... 4 2.3 Measurement Uncertainty...................................................................................................................... 4 3. STOP TRANSMITTING TIME TEST .......................................................................................5 3.1 Test Equipment...................................................................................................................................... 5 3.2 Block Diagram of Test Setup ................................................................................................................ 5 3.3 Limit ...................................................................................................................................................... 5 3.4 Test Results............................................................................................................................................ 5 4. 20 DB BANDWIDTH TEST.........................................................................................................7 4.1 Test Equipment...................................................................................................................................... 7 4.2 Block Diagram of Test Setup ................................................................................................................ 7 4.3 Limit ...................................................................................................................................................... 7 4.4 Test Results............................................................................................................................................ 7 5. DUTY CYCLE CORRECTION FACTOR ................................................................................9 5.1 Test Equipment...................................................................................................................................... 9 5.2 Block Diagram of Test Setup ................................................................................................................ 9 5.3 Limit ...................................................................................................................................................... 9 5.4 Test Results............................................................................................................................................ 9 6. RADIATED EMISSION MEASUREMENT............................................................................12 6.1 Test Equipment.................................................................................................................................... 12 6.2 Block Diagram of Test Setup .............................................................................................................. 12 6.3 Radiated Emission Limit ..................................................................................................................... 13 6.4 Test Results.......................................................................................................................................... 14 SHENZHEN LCS CERTIFICATION SERVICES INC. Report No. LCS0912240562F FCC ID:X4R318A Page 3 of 18 1. SUMMARY OF STANDARDS AND RESULTS Applicant ： JYT Enterprises Manufacturer ： Changzhou Supersonic Industrial Co., Ltd EUT ： Transmitter Model No. ： RTFC318 Serial No. ： N/A Power Supply ： DC 12V Description of Test ItemStandard Results Stop Transmitting Time Test FCC Part 15C: 15.231 PASS 20 dB Bandwidth Test FCC Part 15C: 15.231 PASS Duty Cycle Correction FactorFCC Part 15C: 15.231&15.35 PASS Radiated Emission Test FCC Part 15C: 15.231 ANSI C63.4: 2006 PASS The measurement results are contained in this test report and SHENZHEN EMTEK CO., LTD. is assumed full responsibility for the accuracy and completeness of these measurements. Also, this report shows that the Equipment Under Test (EUT) is to be technically compliant with the FCC requirements. This report applies to above tested sample only. This report shall not be reproduced in part without written approval of SHENZHEN LCS CERTIFICATION SERVICES INC. Date of Test: December 24, 2009 – January 15, 2010 Prepared by: (Engineer) Reviewed by: (Quality Manager) SHENZHEN LCS CERTIFICATION SERVICES INC. Report No. LCS0912240562F FCC ID:X4R318A Page 4 of 18 2. GENERAL INFORMATION 2.1 Description of Device (EUT) 2.2 Test Facility 2.3. Measurement Uncertainty Radiation Uncertainty (30M~1GHz) : Ur = ±4.26dB Radiation Uncertainty (1G~3GHz) : Ur = ±2.66dB EUT : Remote Transmitter Model Number : RTFC318 Power Supply : DC 12V Applicant : JYT Enterprises Address : P.o Box 120159 Clermont F…

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SHENZHEN LCS CERTIFICATION SERVICES INC. Report No. LCS0912240562F FCC ID:X4R318A Page 1 of 1 TEST SETUP PHOTOGRAPH Fig. 1 Fig. 2