TQMFM875FM Transmitter

FM TRANSMITTER introduction: Product model: JH-CMWT10401 Product brief: 1, DC power: DC12V 2, connector: Ф3.5 stereo plug and USB2.0 connector 3, transmit frequency point: it is complete frequency channels, 88.1-107.9MHz, Produce Feature: 1, LCD shows: showings transmit frequency point 2, up button: up choose the available frequency point 3, down button: down choose the available frequency point 4, switch button: power button 5, memory effect: memories the frequency point last time. Product details: 1, on / off: transmitter put into the cigarette of the car, and get the power from car, the power button control the on / off. 2, showing frequency point: up and down button control available frequency point, 88.1-107.9 MHz 3. transmit effect: before turn on the radio, turn down your radio voice, and choose the frequency of your radio as same as your transmitter then turn loud your radio and enjoy the music. 4, charge effect: if the battery of mp3 is charge battery, you can charge for your MP3 use the USB connector when your MP3 power is low. Operate Installation: 1, car cigarette connecter. 2, Ф3.5 stereo plug 3, USB2.0 connector 4, LCD 5, UP button 6, down button 7, switch button Noted, you must lean about the conditions before using. A, in order to your safety, do not connect the item to your car when you are driving. B, if your car is single case, the cigarette plug is back seat, so sometimes there is noise when you using it. C, when you use the transmitter, PLS put the item in the convenience place. D, when you stop using the transmitter, you must take offer the transmitter for the cigarette plug of your car. E, when you operate the take in / out the cigarette plug with your car, you must hold the body with hand. F, when the fuse-wire is damaged, you must change new one of 1A in time. G, do not put strong sun-light or high temperature place when you keep. H, when the item need improve, it will be change of the specification, our company will not inform the case, hope user can understand. FCC NOTICE 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.

LCD Display LCD Drive Audio Signal Input Pre-Amplify CPU Amplify Antenna Stereo Modulation Phase-Locked Loop

MODEL:JH-CMWT10401 PRODUCT NAME: FM Transmitter FCC ID: TQMFM875 POWER: DC12V FREQUENCY: 88.1-107.9MHz MANUFACTURER: Best Talent Industrial Limited SER. No.: Made in China FCC MARKING/LABEL FOR PART15 30mm 20mm

THE WORK FLOW OF FM Transmitter The FM TRANSMITTER is mainly connects of four parts: 1: CPU control part 2: Programmable Flash Memory 3: transmission frequency modulator and LCD display 4: the power supply circuit. Part1: The BH1415F is a FM stereo transmitter. The IC consists of a stereo modulator for generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air. The stereo modulator generates a composite signal which consists of the MAIN, SUB, and pilot signal from a 38KHz oscillator. The FM transmitter radiates FM wave on the air by modulating the carrier signal with a composite signal. It output DACKCE date signal control frequency. And BH1415F is PLL phase detector, a main of output control a modulator voltage modulator, a main signal of 19KHZ oscillator and a composite signal of 38KHz oscillators add to RF modulator. RF modulator export the modulated stereo radio signal, then this signal be amplified. Part2: AT24C02 is Programmable Flash Memory IC, The AT24C02A provides 2048bits of serial electrically erasable and programmable read only memory (EEPROM) organized as 256words of 8 bits each. It connects EM78P803A. Part3: EM78P803A is LCD display and transmission frequency modulator, The EM78P803A a main of BH1415F supply data signal is modulator LCD display and transmission frequency control. Part4: The power supply circuit is mainly consist of DC/DC converter TA7805,12V voltage from car cigarette lighter can be convert to 5V by the TA7805.this part can supply 5V voltage to all other IC and circuit to work . IPOD charge of circumjacent power supply circuit DC 12V voltage supply.

FMTXrev2.1-1.sch-1 - Tue Oct 11 10:51:49 2005

Page 1 of 21 FCC ID: TQMFM875 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20051774 FCC CERTIFICATION On Behalf of SENDSTATION SYSTEMS FM Transmitter Model No.: JH-CMWT10401 FCC ID: TQMFM875 Prepared for : Best Talent Industrial Limited Address : Kehui Industrial Region, Huachang Road, Longhua Town, Shenzhen, Guangdong, China Prepared by : ACCURATE TECHNOLOGY CO. LTD Address : F1, Bldg. A, Changyuan New Material Port, Keyuan Rd. Science & Industry Park, Nanshan, Shenzhen, Guangdong P.R. China Tel: (0755) 26503290 Fax: (0755) 26503396 Report Number : ATE20051774 Date of Test : October 22, 2005 Date of Report : October 24, 2005 Page 2 of 21 FCC ID: TQMFM875 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20051774 TABLE OF CONTENTS Description Page Test Report Certification 1. GENERAL INFORMATION .......................................................................................................... 4 1.1. Description of Device (EUT)....................................................................................................................4 1.2. Description of Test Facility ......................................................................................................................4 1.3. Measurement Uncertainty.........................................................................................................................4 2. MEASURING DEVICE AND TEST EQUIPMENT ..................................................................... 5 3. RADIATED EMISSION FOR FCC PART 15 SECTION 15.239(C)........................................... 6 3.1. Block Diagram of Test Setup....................................................................................................................6 3.2. The Emission Limit for section 15.239(c) ................................................................................................6 3.3. Configuration of EUT on Measurement ...................................................................................................7 3.4. Operating Condition of EUT ....................................................................................................................7 3.5. Test Procedure ..........................................................................................................................................7 3.6. The Field Strength of Radiation Emission Measurement Results ............................................................8 4. FUNDAMENTAL RADIATED EMISSION FOR FCC PART 15 SECTION 15.239(B) ........ 10 4.1. Block Diagram of Test Setup..................................................................................................................10 4.2. The Emission Limit For Section 15.239(b) ............................................................................................10 4.3. EUT Configuration on Measurement .....................................................................................................11 4.4. Operating Condition of EUT ..................................................................................................................11 4.5. Test Procedure ........................................................................................................................................11 4.6. The Emission Measurement Result ........................................................................................................12 5. OCCUPIED BANDWIDTH FOR FCC PART 15 SECTION 15.239(A) ................................... 13 5.1. The Requirement For Section 15.239(a).................................................................................................13 5.2. EUT Configuration on Measurement .....................................................................................................13 5.3. Operating Condition of EUT ..................................................................................................................13 5.4. Test Procedure ........................................................................................................................................13 5.5. Test Result ..............................................................................................................................................14 APPENDIX I ( TEST CURVES) (6pages) Page 3 of 21 FCC ID: TQMFM875 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20051774 Test Report Certification Applicant : Best Talent Industrial Limited Manufacturer : Best Talent Industrial Limited EUT Description : FM Transmitter (A) MODEL NO.: JH-CMWT10401 (B) SERIAL NO.: N/A (C) POWER SUPPLY: 12V DC Measurement Procedure Used: FCC Rules and Regulations Part 15 Subpart C Section 15.239: 2004 & ANSI C63.4: 2003 The device described above is tested by ACCURATE TECHNOLOGY CO. LTD to determine the maximum emission levels emanating from the device. The maximum emission levels are compared to the FCC Part 15 Subpart C Section15.239 limits. The measurement results are contained in this test report and ACCURATE TECHNOLOGY 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 ACCURATE TECHNOLOGY CO. LTD. Date of Test : October 22, 2005 Prepared by : (Engineer) Reviewer : (Quality Manager) Approved & Authorized Signer : (Manager) Page 4 of 21 FCC ID: TQMFM875 ACCURATE TECHNOLOGY CO. LTD REPORT NO. ATE20051774 1. GENERAL INFORMATION 1.1. Description of Device (EUT) EUT : FM Transmitter Model Number : JH-CMWT10401 Power Supply : 12V DC Applicant : Best Talent Industrial Limited Address : Kehui Industrial Region, Huachang Road, Longhua Town, Shenzhen, Guangdong, China Manufacturer : Best Talent Industrial Limited Address : Kehui Industrial Region, Huachang Road, Longhua Town, Shenzhen, Guangdong, China Date of sample…

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