SPNTX400-72FMRADIO CONTROL SYSTEM

TX400-72FM Radio Control Transmitter Instruction Manuals 1. Summarize of circuit The TX400-72FM transmitter is made up with High-Frequency (HF short for as follows) circuit and Low-Frequency (LF short for as follows) circuit. Separately, the HF part include RF Oscillation, RF Amplifier, Power Amplifier and Matched Impedance Antenna circuit, and Modulation Signal Source, Shaping circuit are included in the LF part. This transmitter comprises 4 proportional control channels. P 1 ~P 4 is the control pot of each proportional channel. When different voltage being sent into correspondence pins of MCU PIC16F676, the pin 5 outputs a pulse train used to modulating carrier signal. Electronic specification Operation frequency: 72.130~72.870MHz, 10 different frequencies in all and stepped by 82.22KHz. Modulation degree: f f Using guide . As the picture 2 shown, installing 8 cell “AA” Nicd or NiNH battery into battery case. . Power on the transmitter, all 3 LEDS (from left to right: red, yellow and green) illuminated until the battery voltage drops 9.0V, green LED goes dark at 8.6~8.9V and yellow LED goes dark lower than 8.6V, it has to be charged at this time. . As the picture 1 shown, 2 control sticks on the main board used operation form as follows: Left stick: Up and Down is Throttle Left and Right is Rudder Right stick: Up and Down is Elevator Left and Right is Aileron Every channel has a Trim Levers on the side of each stick. . Reverse switch for CH1~CH4 are beside the power switch. . In the left corner, there is a trainer switch, when the 2 transmitter connected by a trainer core with the trainer jack at the back of the transmitter, stir the trainer switch can make the two transmitters have the trainer function. . As the picture 2 shown, it is the back drawing of the transmitter, at the bottom left side is charger jack, below is the connect form of R6M-72F receiver, servos, and battery pack. Note: This equipment has been tested and found to comply with the limits for a digital device, pursuant to part 95 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 instruction 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 TV 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.

EUT - Front View EUT - Back View

FCC ID Label Sample for Model: TX400-72FM, R6M-72F FCC ID: SPNTX400-72FM This device complies with Part 95 of the FCC Rules.

FCC ID Label This device complies with Part 95 of the FCC Rules. Proposed Label Location on EUT EUT Top View/ proposed FCC Mark Location FCC-ID: SPNTX400-72FM This device complies with Part 95 of the FCC Rules.

PCB– Front View PCB –Back View

Circuit Description The TX400-72FM transmitter is made up with High-Frequency (HF short for as follows) circuit and Low-Frequency (LF short for as follows) circuit. Separately, the HF part include RF Oscillation, RF Amplifier, Power Amplifier and Matched Impedance Antenna circuit, and Modulation Signal Source, Shaping circuit are included in the LF part. This transmitter comprises 4 proportional control channels. P 1 ~P 4 is the control pot of each proportional channel. When different voltage being sent into correspondence pins of MCU PIC16F676, the pin 5 outputs a pulse train used to modulating carrier signal.

TX400-72FM Transmitter Adjusting Progress There are two steps when adjusting up the transmitter: 1. PCB testing 1.1 Adjusting the frequency of the transmitter by modulating the potentiometer TR 1 , TR 2 and the local oscillator loop L 1 on the PCB. 1.2 Adjusting the power of transmitter by modulating the antenna loop T 2 ,T 3 ,L 2 and L 3 . Measure the voltage between antenna load ”U p ”: U=U 1.3 2. Check the whole device Connect a motor and two servos to the output of suitable receiver, operating both the Throttle lever and the directional control stick, and the helm on the servo will be running according to this control. Transmitter could be consider eligible if it meets the above requirements.

FCC TEST REPORT Page 1 of 20 FCC ID : SPNTX400-72FM Applicant : Zhu Hai Xing Yu Model Products Co., Ltd. Equipment Under Test (EUT) : Product description : Radio Control System Model No. : TX400-72FM, R6M-72F Standards : FCC RULES PART 95-Personal Radio Service Subpart C-Radio Control (R/C) Radio Service Subpart E-Technical Regulations FCC RULES PART 2- Frequency Allocations and Treaty Matters General Rules and Regulations Date of Test : September 5, 2006 Test Engineer : Tiger Su Reviewed By : PERPARED BY: Waltek Services (Shenzhen) Co., Ltd. 8C,West Tower, Aidi Building, No.5003 Binhe Rd, Futian District, Shenzhen 518045, Guangdong, China. Tel: 86-755-83551033 Fax: 86-755-83552400 Zhu Hai Xing Yu Model Products Co., Ltd. FCC ID:SPNTX400-72FM Page 2 of 20 2 Contents Page 1 COVER PAGE..........................................................................................................................................................1 2 CONTENTS ..............................................................................................................................................................2 3 TEST SUMMARY....................................................................................................................................................3 4 GENERAL INFORMATION..................................................................................................................................4 4.1 CLIENT INFORMATION............................................................................................................................................4 4.2 GENERAL DESCRIPTION OF E.U.T...........................................................................................................................4 4.3 DETAILS OF E.U.T. .................................................................................................................................................4 4.4 DESCRIPTION OF SUPPORT UNITS...........................................................................................................................4 4.5 STANDARDS APPLICABLE FOR TESTING..................................................................................................................4 4.6 TEST FACILITY........................................................................................................................................................5 4.7 TEST LOCATION......................................................................................................................................................5 5 EQUIPMENT USED DURING TEST ...................................................................................................................6 6 CONDUCTED EMISSION TEST ..........................................................................................................................7 7 PERSONAL RADIO SERVICE IN FCC PART95 ...............................................................................................8 7.1 OUTPUT POWER RADIATED....................................................................................................................................8 7.1.1 Test Procedure .............................................................................................................................................8 7.1.2 Test Setup .....................................................................................................................................................8 7.1.3 Measurement Record: ................................................................................................................................10 7.2 UNWANTED EMISSIONS RADIATED TEST...............................................................................................................11 7.2.1 Test Procedure ...........................................................................................................................................11 7.2.2 Test Setup ...................................................................................................................................................11 7.2.3 Measurement Record: ................................................................................................................................12 7.3 MODULATIONS CHARACTERISTICS/EMISSION TYPES TEST...................................................................................13 7.4 OCCUPIED BANDWIDTH........................................................................................................................................13 7.4.1 Test Procedure ...........................................................................................................................................13 7.4.2 Test Setup ...................................................................................................................................................13 7.4.3 Measurement Record: ................................................................................................................................14 7.4.4 Test result:..................................................................................................................................................15 7.5 FREQUENCY STABILITY.........................................................................................................................................15 7.5.1 Test Procedure ...........................................................................................................................................15 7.5.2 Test Setup ...................................................................................................................................................15 7.5.3 Measurement Record: ................................................................................................................................16 8 PHOTOGRAPHS — EUT TEST SETUP .........................................................................…

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Photographs –Radiation Emission Test Setup