POSEF-6309FM Transmitter

EF-6309C Manual 1 Product parts 2 Operation Instruction 1、Turn on FM radio inside car. Choose an empty FM channel. i.e 88.9 MHZ. 2、Insert accessory adaptor to car charge. And insert adaptor output to DC jack of transmitter. 3、Insert the audio jack of transmitter to earphone jack of MP3、MP4、IPOD、CD. 4、Press MP3 or MP4 or IPOD or CD play button, Then Press and hold for one second for turn on the transmitter. The transmitter LCD show the last frequency used previous automatically. 5、Press once briefly channel up/down button. Frequency adjust UP or down with step 0.1MHz. Press and hold button for several seconds frequency adjust with step 1MHz. Tune in the radio to the same frequency as the product such as 88.9Mhz. 6、LCD display show frequency and with backlight. LED of backlight turn off automatically after 7 seconds operation stop. MP3 or MP4 or IPOD or CD player turn off or pause more than 1 minute Transmitter turn off automatically. 7、Put the transmitter on the car radio side. Tune in the car radio to enjoy dulcet music. 3 Key and jack introduction 1、Power Key―― Press and hold for one second for turn on or off transmitter 2、+ Next Key――Press once briefly channel up button. Frequency adjust UP with step 0.1MHz. Press and hold button for several seconds frequency adjust UP with step 1MHz. 3、- Previous Key――Press once briefly channel down button. Frequency adjust down with step 0.1MHz. Press and hold button for several seconds frequency adjust down with step 1MHz. 4、DC jack——connect the DC 3V car charge. 5、LCDdisplay——Display the transmitter channel and battery capability. 6、audio wire——connect the earphone jack of IPOD or MP3 or CD or MD. 4 Accessory：3V adaptor(1PCS) battery lid LCD display audio wire DC JACK channel key power key Warning: Changes or modifications to this unit 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. 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 interface, and (2) This device must accept any interface received , including interference that may cause undesired operation.

BH1415F Audio ICs z zz zBlock diagram Shift register MPX RF OSC RF GND PLL V CC GND V CC LPF LPF Program counter MUTE Phase detector + 4 1 2 1 50 1 19 1 2 V CC + + − − Pre-emphasis and Limiter 1234567891011 2221201918171615141312 L-ch INPUTPRE-EMPHASIS TIME CONSTANTLPF TIME CONSTANTPILOT SIGNAL ADJUSTAUDIO MUTINGDATACLOCKCHIP ENABLEX'tal OSCILLATORX'tal OSCILLATORPLL V CC R-ch INPUT PRE-EMPHASIS TIME CONSTANT LPF TIME CONSTANT FILTER COMPOSITE SIGNAL OUTPUT GND PLL PHASE DETECTOR OUTPUT V CC RF OSCILLATOR RF GND RF OUTPUT

Wilson Loke ES-HKG From: Generic Office of Engineering Te chnology [oetech@ fccsun27w.fcc.gov] Sent: Thursday, January 18, 2007 4:58 AM To: [email protected] Subject: Response to Inquiry to FCC (Tracking Number 184618) 1/19/2007 Inquiry: FM transmitter (15.239) FCC ID: POSEF - 6307 The EUT is a FM transmitter un der 15.239 from 88.1MHz to 107 .9MHz. Since its operating fr equency is from 88.1MHz to 107.9MHz witin the band of 88MHz to 108M Hz with the fundamental field streng th less than 48dBuV/ m at 3m, it is consider fall in the scope of Category 1-15.239 FM transmitter. The test procedure plan is listed in the following: i) Radiated emission ii)Bandwidth test 1) How does this device operate? The device is operated as 88.1MHz to 107.9MHz FM transmitter an d powered by 3.0Vdc through two AAA batteries or 3Vdc/12Vdc ca r adaptor. It transmit the audio signal from a external audio source such as MP3 player by a FM transmitter tuned from 88.1 MHz to 107.9MHz and the audio s ignal can be received by a common FM Broadcasting Radio which is tuned to same transmitted frequency of the FM transmitter and regenerate the transmitted signal through the FM Broadcasting Radio. 2) Provide information on the device and its antenna. The device is a simple audio FM transmitter tuned from 88.1MHz to 107.9MHz to transm it an audio source, for example, MP3 playe r, to a FM Broadcasting Radio. The block diagram and circuit diagram are attached for your reference. The antenna is an integral long wire antenna. The block diagram, circuit diagram and internal photo are provided 3) How is it installed? It is very easy to install. It is powered by two AAA batteries or 3V/12V car adaptor . Before active the device, it is connecte d the audio input socket to the external audio source such as MP3 player. And then, switching on the device and the FM Broadcas ting Radio. And then, playing th e audio from the external audio source (MP3 player) Tuning the FM br oadcasting radio to the frequencies which do not occupied by other FM broadcasted cha nnel. After that, tuning the FM transmitter to that freqnency, the audio signal from the external audio source will be heard. 4) What test procedure was used? A NCI C63.4:2003. 5) If tested in a car, how was it configured/tested? For the Car adaptor, we connected the Car ad aptor and the 12V car battery and then put the EUT on a 0.8m height turntable 3m fr om antenna. The adaptor, MP3 player and EUT with 10cm separated distance. The test configuration photo is attached for your reference. 6) Was the tuning range properly verified? The test lab should in dicate in the report that the tuning controls were manually ad justed to verify maximum tuning range. Yes. The tuning range is from 88.1MHz to 107.9M Hz. The tuning controls were manually adjusted. 7) Was the bandwidth properly tested with maximum audio input? The maximum output Level of the typica l device, ipod mp3 player is used. 1/19/2007 8) Use a typical audio file from typical device A typical audio file (pop mu sic) from a typical device (ipod mp3 player) are used. 9) Provide the test report Provided. --- Reply from Customer on 01/11/2007 --- 1) the antenna is a wire antenna and installed with the audio input wire within the au dio input cable attached with device. (see photo attached. 2) No the antenna is not design ed to be coupled to anythi ng. It is stand alone wire antenna. 3) Sorry for wr ong last submission. (w ithout modulaton) The typical audi o source, pop music, is modulated through the typical device, ip od mp3 player, at the maximum output sett ing/volume (450mV) and the rated maximum audio input of the device is 40 0mV. The new plot is attached. Response: Please go ahead and complete the file. Ensure that the test report includes the new bandwidth tests. Ensure that all exhibits comply with FCC rules and polices. Do not reply to this mess age. Please select the Reply to an Inquiry Response link from the OET In quiry System to add any additional information pe rtaining to this inquiry. 1/19/2007

EXTERNAL PHOTOS

Label Size: 45mm × 8mm

INTERNAL PHOTOS Antenna Antenna

Technical Description BH1415F Audio ICs Wireless Audio Link IC BH1415F The BH1415F is a FM stereo transmitter IC that transmits simple configuration. 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. z zz z Applications CD changer, Car TV, Car navigation, Wireless speakers, Personal computer (sound board), Game machine z zz zFeatures 1) It is possible to improve the timbre because it has the pre-emphasis circuit, limiter circuit, and the low-pass filter circuit. 2) Built-in pilot-tone system FM stereo modulator circuit. 3) The transmission frequency is stable because it has a PLL system FM transmitter circuit. 4) PLL data input (CE, CK, DA) by serial input. z zz z Absolute maximum ratings (Ta = 25°C, In measurement circuit.) Supply voltage Power dissipation Storage temperature Data input voltage Phase comparator output voltage ∗ Derating : 4.5mW/°C for operation above Ta=25°C. ParameterSymbolLimitsUnit V CC Pd Tstg V V V mW °C +7.0 −0.3~V CC+0.3 −0.3~V CC+0.3 −55~+125 Conditions V IN-D VOUT-P 450 Pin8,12 Pin15,16,17,18 Pin7 ∗ z zz zRecommended operating conditions (Ta = 25°C) Audio input level ParameterSymbol Min. Unit V CCV V V °C 4.0 −40 − Conditions V IN-A fIN-A Topr t PRE fTX VIH VIL 20 − 70 0.8V CC GND Max. 6.0 +85 −10 15k 155 120 V CC 0.2VCC Typ. − − − − − − − − dBV Hz μsec MHz Pin8,12 Pin1,22 Pin1,22 Pin2,21 Pin9,11 Pin15,16,17,18 Pin15,16,17,18 Operating supply voltage Operating temperature Audio input frequency band Pre-emphasis time constant set up range Transmission frequency Control terminal "H" level input voltage Control terminal "L" level input voltage BH1415F Audio ICs z zz zBlock diagram Shift register MPX RF OSC RF GND PLL V CC GND V CC LPF LPF Program counter MUTE Phase detector + 4 1 2 1 50 1 19 1 2 V CC + + − − Pre-emphasis and Limiter 1234567891011 2221201918171615141312 L-ch INPUTPRE-EMPHASIS TIME CONSTANTLPF TIME CONSTANTPILOT SIGNAL ADJUSTAUDIO MUTINGDATACLOCKCHIP ENABLEX'tal OSCILLATORX'tal OSCILLATORPLL V CC R-ch INPUT PRE-EMPHASIS TIME CONSTANT LPF TIME CONSTANT FILTER COMPOSITE SIGNAL OUTPUT GND PLL PHASE DETECTOR OUTPUT V CC RF OSCILLATOR RF GND RF OUTPUT BH1415F Audio ICs z zz z Pin descriptions Pin No. 1 Pin descriptions R-ch audio source input terminal L-ch audio source input terminal It cuts DC with the capacitor and it inputs R-ch audio signal. It cuts DC with the capacitor and it inputs L-ch audio signal. DC (V) 1 2 V CC 1 2 V CC 1 2 V CC 1 2 V CC 1 2 V CC 1 2 V CC 1 2 V CC 22 2,21 Pre-emphasis time constant terminal It connects a capacitor for the time constant of pre-emphasis. Equivalent circuit 8 6 8 6 8 6 4 22 1 or 21 2 or 20 3 or 43k 1k 100k 50k 50k 50p 22.7k 3,20 LPF time constant terminal This is 15kHz LPF. It connects a 150pF capacitor. 100k100k − + 4 Filter terminal It is a ripple filter for the reference voltage of the audio part. 5 6 7 8 Composite signal output terminal It connects to the FM modulator. 8 5 6 8 7 6 GND GND − − PLL phase detector output terminal It connects to the PLL LPF circuit. − Power supply terminal V CC τ = 22.7kΩ × C BH1415F Audio ICs Equivalent circuitPin descriptionsPin No. 9 10 11 RF oscillator terminal DC (V) 4 7 V CC 8 9 10 12 13,14 15 16 17 18 19 12 18 17 16 15 6 RF GND GND − − − − This is the base terminal of the colpitts oscillator. It connects time constant of the oscillation. 25k 40k 30p 2p 18p 12 1413 6 8 11 10 RF transmission output terminal It connects to the antenna through BPF. VCC −1.9 PLL power supply terminal V CC X'tal oscillator terminal It connects a 7.6MHz crystal oscillator. 4k 1M Chip enable terminal The terminal to make high level in serial data input. The clock which takes data and synchronization in serial data input. Clock input terminal Data input terminal The input terminal of the serial data which is forwarded from the controller Audio mute terminal 0.8V CC ≤ Pin18 : Mute ON 0.2V CC ≥ Pin18 : Mute OFF Pilot signal adjust terminal 8 19 6 or or or 1 2 V CC 5k BH1415F Audio ICs z zz zElectrical characteristics (Unless otherwise noted Ta = 25°C, V CC = 5.0V, Signal source : f IN = 400Hz) ParameterSymbol I Q142028mA Min.Typ.Max.UnitConditions Measurement circuit Fig.1 Fig.2 Fig.2 Fig.3 Fig.3 Fig.3 Fig.3 Fig.3 Fig.3 Fig.6 Fig.7 Fig.7 Fig.7 Fig.7 Fig.8 Fig.8 Fig.4 Fig.5 Quiescent current Channel separation Sep2540 − − − − −− − − − − − −− − dB dB dB dBV dB dB dBμV Total harmonic distortion "off" level leak current1 "off" level leak current2 "H" level input current "H" level output voltage "L" level output voltage "L" level input current Channel balance Input output gain Pilot modulation rate Sub carrier rejection ratio Pre-emphasis time constant Limiter input level LPF cut off frequency Mute attenuation volume Transmission output level THD C.B Gv M P SCR τ PRE VIN(LIM) fC(LPF) VO(MUTE) VTX IIH IIL VOH VOL IOFF1 IOFF2 −2 −30−20 −10−13 −48−42 −2 −16 −1.0 −100 12 12 40 97 V CC-VCC- 1.0 0.1 0 0 15 50 15 100 0.15 0.15 0.3 +2 +2 18 60 18 103 1.0 100 1.0 % % μsec kHz μA μA V V nA nA V IN=−20dBV V IN=−20dBV V IN=−20dBV V IN=−20dBV V IN=−20dBV V IN=−20dBV V IN=−20dBV V IN=−20dBV,L+R L→R,R→L L+R L+R L+R L+R L+R L+R Pin5 Output level at 1dB gain compression V O=−3dB Pin2,21Open f TX=100MHz Pin15,16,17,18 VIN=5V Pin15,16,17,18 V IN=0V Pin7 I OUT=−1.0mA Pin7 I OUT=1.0mA Pin7 V OUT=5V Pin7 V OUT=GND BH1415F Audio ICs z zz zMeasurement circuits Quiescent current Shift register MPX RF OSC RF GND PLL V CC GND V CC LPF LPF Program counter MUTE Phase detector + 4 1 2 1 50 1 19 1 2 VCC + + − − Pre-emphasis and Limiter 1234567891011 2221201918171615141312 150p 2200p 150p 2200p Muting Data Clock Chip enable 27p27p 10 μ 0.01μ 0.01 μ 100μ A 7.6MHz +5V I Q Fig.1 BH1415F Audio ICs Channel separation Channel b…

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