HDT80TX138REMOTE CONTROL TRANSMITTER

wall mart diagram.sch-1 - Wed Jun 18 08:28:23 2003 ( FM ) IC - EM 78P458

APPLICANT: ABC LTD. FCC ID: Circuit Description Q3, D1 and D2 forms the oscillation which the modulation from IC- EM78P458 drives into the base of Q3. Q2 and T2 form the amplifier network for the signal and Q1 forms the matching network with L0, C1 T1 and C2 that limit the harmonic content and effect the proper coupling of the antenna to the output stage. Antenna, Ground, and Power Source The antenna is unique and consists of a 1m long telescoping chrome over brass tubing. There is no external ground connection. The ground is only that of the printed circuit board. Electric current is supplied by a 12 Volt primary storage cell. HDT80TX138 Kin Yat Industrial Co. Ltd

Tune Up and Alignment Procedure This information is not for the general users as the alignment is preset in the factory, no further alignment is necessary unless repairing is conducted by a qualified technician. TRANSMITTER ( Alignment procedure ): Equipment to be used: Spectrum analyzer connected with a standard receiving antenna; 9V power supply connected to the battery compartment. 1) Fully extend the antenna in the controller ( transmitter); 2) Place the receiving antenna of the spectrum analyzer at a distance that the spectrum analyzer can receive the transmitted fundamental and harmonic signals from the controller. 3) Tune T2 and T1 for maximum amplitude of the fundamental ( 27.145Mhz) and at the same time the minimum amplitude for the harmonics. RECEIVER ( Alignment procedure ): In the r.f. front end and IF strip, there is no component for alignment, the crystal (X2) frequency tolerance and the center frequency of the ceramic filter (X1) and discriminator (X3) are specified within the design tolerance to ensure the acceptable receiving sensitivity of operation. -------------- END --------------------

Digital Proportional Part List ITEM_No ITEM_DESC QTY POSIT TX-PTH-138-27 PCBA:PTH ASSY FOR TX138 1 5227M016V-SDC ELECT CAP:220UF/25V+-20% 1 C17 52476M016V-LDC ELECT CAP:47UF/25V+-20% 1 C16 6111.5T7MM I.F.T.:KB35-11.5T-7MM DIA 1 T1 61837045 I.F.T.:837045(7X7MM AM INT) 1 T2 63127K-EC24 INDUCTOR:1.2UH+-10% EC-24 1 L1 63827K-EC24 INDUCTOR:8.2UH+-10% EC-24 1 L3 64WH-53G3SC5-GR LED:5MM GREEN 1 LED1 64WH-W05310AP-RD LED:5MM RED 1 LED3 64WH-W05310-YE LED:5MM YELLOW 1 LED2 65MV-2105 VARACTOR:MV-2105 2 D1D2 701702N-TO92 TRANSISTOR:1702N TO-92 1 Q1 7127.145M-HC50U CRYSTAL:27.145MHz,HC-50U 1 X1 893.58M-Z CRYSTAL:3.58MHz, 1 X2 8178L05-TO92 IC:78L05,5V,TO-92 1 U1 80KY138R0-94V0-1 PCB:KEYT138 R0 1 09H10091WH CRYSTAL BASE 1 79SS12F82G7B SWITCH:SS-12F82-G7B 1 81EM78P458-DIP IC:EM78P458 1 U2 TX-SMD-138-27 PCBA:SMD 50103M050VF-0805 C.CAP:0.01UF/50V+/-5% NPO0805SMD 3 C21C22C12 50104M050VF-0805 C.CAP:0.1UF/50V+/-5% NPO0805SMD 1 C15 50273K050VC-0805 CERAMIC.CAP:0.027UF/50V+/-5% NPO0805SMD 1 C3 50151J050VA-0805 C.CAP:150PF/50V+/-5% NPO0805SMD 2 C2C9 50121J050VA-0805 C.CAP:120PF/50V+/-5% NPO0805SMD 1 C5 50047J050VA-0805 C.CAP:47PF/50V+/-5% NPO0805SMD 3 C4C7C8 50033J050VA-0805 C.CAP:33PF/50V+/-5% NPO0805SMD 1 C6 50271J050VA-0805 C.CAP:270PF/50V+/-5%NPO0805SMD 2 C10C11 50020J050VA-0805 C.CAP:20PF/50V+/-5%NPO0805SMD 1 C1 50015J050VA-0805 C.CAP:15PF/50V+/-5%NPO0805SMD 2 C13C14 55B2703J-0805S RESISTOR:270K 1/10W+-5%0805SMD 1 R2 55B1003J-0805S RESISTOR:100K 1/10W+-5%0805SMD 2 R3R1 55B1002J-0805S RESISTOR:10K 1/10W+-5%0805SMD 1 R25 55B4701J-0805S RESISTOR:4.7K 1/10W+-5%0805SMD 5 R8R5R22R23R7 55B2201J-0805S RESISTOR:2.2K 1/10W+-5%0805SMD 1 R6 55B0100J-0805S RESISTOR:100 OHM 1/10W+-5%0805SMD 1 R31 55B5102J-0805S RESISTOR:51K 1/10W+-5%0805SMD 1 R21 55B3001J-0805S RESISTOR:30K 1/10W+-5%0805SMD 1 R20 55B4703J-0805S RESISTOR:470K 1/10W+-5%0805SMD 12 R9R10R11R12R13R14R15R16R17R18R19R24 55B3300J-0805S RESISTOR:330OHM 1/10W+-5%0805SMD 1 R4 702SC1623-S23S TRANSISTOR:2SC1623(SOT23) 2 Q2Q3 80TX138R0-KB-1 PCB:TX138 1

APPLICANT: KIN YAT INDUSTRIAL CO., LTD. FCC ID: HDT80TX138 REPORT #: K\KIN YAT_HDT\1366HT3\1366HT3TestReport.doc TABLE OF CONTENTS TABLE OF CONTENTS LIST APPLICANT: KIN YAT INDUSTRIAL CO., LTD. FCC ID: HDT80TX138 TEST REPORT: PAGE 1............GENERAL INFORMATION & TECHNICAL DESCRIPTION PAGE 2............TECHNICAL DESCRIPTION CONTINUED RF POWER OUTPUT PAGE 3............MODULATION CHARACTERISTICS OCCUPIED BANDWIDTH PAGE 4............OCCUPIED BANDWIDTH PLOT PAGE 5............FIELD STRENGTH OF SPURIOUS EMISSION PAGE 6............METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 7............FREQUENCY STABILITY PAGE 8............TEST EQUIPMENT LIST EXHIBIT CONTAINING: EXHIBIT 1.........BLOCK DIAGRAM EXHIBIT 2.........SCHEMATIC EXHIBIT 3.........PARTS LIST EXHIBIT 4.........USERS MANUAL EXHIBIT 5.........LABEL SAMPLE EXHIBIT 6.........LABEL LOCATION EXHIBIT 7.........EXTERNAL PHOTOGRAPHS EXHIBIT 8.........INTERNAL PHOTOGRAPHS EXHIBIT 9.........TUNING PROCEDURE EXHIBIT 10........OPERATIONAL DESCRIPTION EXHIBIT 11........TEST SET UP PHOTOGRAPH APPLICANT: KIN YAT INDUSTRIAL CO., LTD. FCC ID: HDT80TX138 REPORT #: K\KIN YAT_HDT\1366HT3\1366HT3TestReport.doc Page 1 of 8 GENERAL INFORMATION 2.1033(c) (1)(2) KIN YAT INDUSTRIAL CO., LTD. will sell the FCC ID: HDT80TX138 Radio Control transmitter in quantity, for use PART 95 SUBPART C. KIN YAT INDUSTRIAL CO., LTD. 7 TH FLOOR, GALAXY FACTORY BUILDING 25-27 LUK HOP STREET, SAN PO KING KOWLOON HONG KONG 2.1033(c) (3) Instruction manual is included as exhibit #4. 2.1033 (4) Type of Emission: 8K0F1D 95.631 (b) (1) Bn = 2M + 2DK M = 4,800 Bits per second D = 800 Hz (Peak Deviation) K = 1 Bn = 2(4800/2) + 2(800)(1) = 4.8K + 3.2K = 8.0k ALLOWED AUTHORIZED BANDWIDTH = 8.00 kHz. 95.631 (b) Authorized Bandwidth 8 kHz for RC Transmitter 2.1033(c) (5) Frequency Range: 26.995 – 27.195 MHz 95.623 (a) (6) Power Range and Controls: There are NO user Power controls. (7) Function of each electron tube or semiconductor device or other active circuit device: See Exhibit #3. (8) Maximum Output Power Rating: 9.0 mW ERP. (9) DC Voltages and Current into Final Amplifier: FINAL AMPLIFIER ONLY Vce = 12.0 Volts DC Ice = 46.0 mA. 2.1033(c) (10) Tune-up procedure. The tune-up procedure is included as Exhibit #9. APPLICANT: KIN YAT INDUSTRIAL CO., LTD. FCC ID: HDT80TX138 REPORT #: K\KIN YAT_HDT\1366HT3\1366HT3TestReport.doc Page 2 of 8 2.1033(c) (10) Complete Circuit Diagrams: The circuit diagram is included as part of Exhibit # 2. (10) Description of all circuitry and devices provided for determining and stabilizing frequency is given in EXHIBIT #10. 2.1033(c) (11) The Equipment identification is shown as Exhibit #5. 2.1033(c) (12) Photographs of the equipment are shown as Exhibits No. 7-8. 2.1033(c) (13) Equipment employing Digital modulation. N/A. 2.1033(c) (14) The data required by 2.1046-2.1057 follows; 2.1046 RF power is measured by the ERP METHOD. There are no provisions to limit the power. With a nominal battery voltage of 12.0 VDC, and the transmitter properly adjusted the RF output measures: Po = 0.0085 Watts ERP 2.1046 RF power output. APPLICANT: KIN YAT INDUSTRIAL CO., LTD. FCC ID: HDT80TX138 REPORT #: K\KIN YAT_HDT\1366HT3\1366HT3TestReport.doc Page 3 of 8 2.1047 Modulation characteristics: AUDIO FREQUENCY RESPONSE Voice is NOT allowed in this band. 2.1049 Occupied bandwidth: 95.635 (b) (1) At least 25dB on any frequency removed from the center of the authorized bandwidth by more than 50% up to and including 100% of the authorized bandwidth. (10) At least 45 dB on any frequency removed from the center of the authorized bandwidth by more than 100% up to and including 125% of the authorized bandwidth. (11) At least 55 dB on any frequency removed from the center of the authorized bandwidth by more than 125% up to and including 250% of the authorized bandwidth. (12) At least 56 + 10 log 10 (T) dB on any frequency removed from the center of the authorized bandwidth by more than 250%. Radiotelephone Transmitter with Modulation Limiter Test Procedure Diagram OCCUPIED BANDWIDTH MEASUREMENT TRANSMITTER UNDER TEST AUDIO OSCILLATOR 50 ohm RESISTIVE WATTMETER APPLICANT: KIN YAT INDUSTRIAL CO., LTD. FCC ID: HDT80TX138 REPORT #: K\KIN YAT_HDT\1366HT3\1366HT3TestReport.doc Page 4 of 8 OCCUPIED BANDWIDTH PLOT APPLICANT: KIN YAT INDUSTRIAL CO., LTD. FCC ID: HDT80TX138 REPORT #: K\KIN YAT_HDT\1366HT3\1366HT3TestReport.doc Page 5 of 8 2.1051 SPURIOUS EMISSIONS AT ANTENNA TERMINALS. NOT APPLICABLE, NO antenna port. This UUT has a permanently attached antenna. 2.1053 UNWANTED RADIATION: 95.635(1)(3)(7)(10)(11)(12) REQUIREMENTS: At least 56 + 10log(T) on any frequency removed from the center of the authorized bandwidth by more than 250%. 56 + 10log(0.0085) = 35.29 dB TEST DATA: Emission Frequency MHz Ant. Polarity Corrected EUT Signal Reading Coax Loss (dB) Substitution Antenna (dBd) dB Below Carrier (dBc) 27.14 V 9.30 0 0 0.00 54.26 V -45.10 0 -1.21 55.61 81.40 V -47.30 0 -1.56 58.16 108.55 V -42.50 0 -1.52 53.32 135.65 V -41.80 0 -1.44 52.54 162.85 V -48.70 0 -1.57 59.57 189.99 V -40.90 0 -1.33 51.53 217.12 V -60.20 0 -1.24 70.74 244.25 V -66.70 0 -1.26 77.26 271.43 V -62.20 0 -1.25 72.75 METHOD OF MEASUREMENT: The procedure used was C63.4-1992. The unit was operating into its permanently attached antenna at a height of 80 cm. The spectrum was scanned from 30 to at least the tenth harmonic of the fundamental using a HP model 8566B spectrum analyzer and an appropriate antenna. Measurements were made at the open field test site of TIMCO ENGINEERING INC. located at 849 N.W. State Road 45 Newberry, FL 32669. APPLICANT: KIN YAT INDUSTRIAL CO., LTD. FCC ID: HDT80TX138 REPORT #: K\KIN YAT_HDT\1366HT3\1366HT3TestReport.doc Page 6 of 8 Method of Measuring Radiated Spurious Emissions APPLICANT: KIN YAT INDUSTRIAL CO., LTD. FCC ID: HDT80TX138 REPORT #: K\KIN YAT_HDT\1366HT3\1366HT3TestReport.doc Page 7 of 8 2.1055(a)(1) Frequency stability: 95.623(b) Temperature and voltage tests were performed to…

Text truncated - open the document above for the full version.