BY3E89427 MHz R/C Transmitter

Model : BY3E894 Circuit Description In the transmit mode the momentary switches FORWARD,REVERSE, RIGHT, LEFT, S1, S2, S3 & S4 provide input to the encoder integrated circuit U1. The output of U1 modulated the RF oscillator Q2 by varying the bias voltage on the base of Q2, the RF output stage. The RF frequency is determined by the crystal Y1 for the crystal oscillator Q1. The output of Q1 is coupled to Q2 the output stage via C2. From Q2 the signal is fed through a low pass filter made up of C8, C9, C10 and L3 to the antenna.

TIMCOTIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: SCIENTIFIC TOYS, LTD. FCC ID: BY3E894 REPORT #: S\SCIENTIF\837HT2\837HT2TestReport.doc COVER SHEET Test Report Product Name: 27MHz WIRELESS REMOTE CONTROL TOY TRANSMITTER FCC ID: BY3E894 Applicant: SCIENTIFIC TOYS, LTD. 13/F., CHAI WAN INDUSTRIAL CENTRE 20 LEE CHUNG STREET, CHAI WAN, HONG KONG Date Receipt: AUGUST 19, 2002 Date Tested: AUGUST 20, 2002 TIMCOTIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: SCIENTIFIC TOYS, LTD. FCC ID: BY3E894 REPORT #: S\SCIENTIF\837HT2\837HT2TestReport.doc TABLE OF CONTENTS TABLE OF CONTENTS LIST APPLICANT: SCIENTIFIC TOYS, LTD. FCC ID: BY3E894 TEST REPORT CONTAINING: PAGE 1-4....TEST EQUIPMENT LIST PAGE 5......TEST PROCEDURE PAGE 6......RADIATION INTERFERENCE TEST DATA PAGE 7......OCCUPIED BANDWIDTH PAGE 8......OCCUPIED BANDWIDTH PLOT EXHIBITS CONTAINING: EXHIBIT 1............BLOCK DIAGRAM EXHIBIT 2............SCHEMATIC EXHIBIT 3............INSTRUCTION MANUAL EXHIBIT 4............SAMPLE OF FCC ID LABEL EXHIBIT 5............LOCATION OF FCC ID LABEL EXHIBIT 6............EXTERNAL PHOTOS EXHIBIT 7............INTERNAL PHOTOS EXHIBIT 8............CIRCUIT DESCRIPTION EXHIBIT 9............TEST SET UP PHOTOGRAPH TIMCOTIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: SCIENTIFIC TOYS, LTD. FCC ID: BY3E894 REPORT #: S\SCIENTIF\837HT2\837HT2TestReport.doc Page 1 of 8 Equipment List DEVICE MFGR MODEL SERNO CAL/CHAR DATE DUE DATE or STATUS X 3-Meter OATS TEI N/A N/A Listed 12/22/99 12/22/02 3/10-Meter OATS TEI N/A N/A Listed 3/26/01 3/26/04 X Receiver, Beige Tower X Spectrum Analyzer (Tan) HP 8566B Opt 462 3138A07786 3144A20661 CAL 8/31/01 8/31/02 X RF Preselector (Tan) HP 85685A 3221A01400 CAL 8/31/01 8/31/02 X Quasi-Peak Adapter (Tan) HP 85650A 3303A01690 CAL 8/31/01 8/31/02 Receiver, Blue Tower Spectrum Analyzer (Blue) HP 8568B 2928A04729 2848A18049 CHAR 10/22/01 10/22/02 RF Preselector (Blue) HP 85685A 2926A00983 CHAR 10/22/01 10/22/02 Quasi-Peak Adapter (Blue) HP 85650A 2811A01279 CHAR 10/22/01 10/22/02 Biconnical Antenna Electro-Metrics BIA-25 1171 CAL 4/26/01 4/26/03 X Biconnical Antenna Eaton 94455-1 1096 CAL 10/1/01 10/1/02 Biconnical Antenna Eaton 94455-1 1057 CHAR 3/15/00 3/15/01 BiconiLog Antenna EMCO 3143 9409-1043 X Log-Periodic Antenna Electro-Metrics LPA-25 1122 CAL 10/2/01 10/2/02 Log-Periodic Antenna Electro-Metrics EM-6950 632 CHAR 10/15/01 10/15/02 Log-Periodic Antenna Electro-Metrics LPA-30 409 CHAR 10/16/01 10/16/02 Dipole Antenna Kit Electro-Metrics TDA-30/1-4 152 CAL 3/21/01 3/21/02 Dipole Antenna Kit Electro-Metrics TDA-30/1-4 153 CHAR 11/24/00 11/24/01 Double-Ridged Horn Antenna Electro-Metrics RGA-180 2319 CAL 12/19/01 12/19/02 Horn Antenna Electro-Metrics EM-6961 6246 CAL 3/21/01 3/21/02 TIMCOTIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: SCIENTIFIC TOYS, LTD. FCC ID: BY3E894 REPORT #: S\SCIENTIF\837HT2\837HT2TestReport.doc Page 2 of 8 DEVICE MFGR MODEL SERNO CAL/CHAR DATE DUE DATE or STATUS Horn Antenna ATM 19-443-6R None No Cal Required Passive Loop Antenna EMC Test Systems EMCO 6512 9706-1211 CHAR 7/10/01 7/10/02 Line Impedance Stabilization . . . Electro-Metrics ANS-25/2 2604 CAL 10/9/01 10/9/02 Line Impedance Stabilization . . . Electro-Metrics EM-7820 2682 CAL 3/16/01 3/16/02 Termaline Wattmeter Bird Electronic Corporation 611 16405 CAL 5/25/99 (5/25/00) Termaline Wattmeter Bird Electronic Corporation 6104 1926 CAL 12/12/01 12/12/02 Oscilloscope Tektronix 2230 300572 CHAR 2/1/01 2/1/02 Temperature Chamber Tenney Engineering TTRC 11717-7 CHAR 1/22/02 1/22/03 AC Voltmeter HP 400FL 2213A14499 CAL 10/9/01 10/9/02 AC Voltmeter HP 400FL 2213A14261 CHAR 10/15/01 10/15/02 AC Voltmeter HP 400FL 2213A14728 CHAR 10/15/01 10/15/02 X Digital Multimeter Fluke 77 35053830 CHAR 1/8/02 1/8/03 Digital Multimeter Fluke 77 43850817 CHAR 1/8/02 1/8/03 Digital Multimeter HP E2377A 2927J05849 CHAR 1/8/02 1/8/03 Multimeter Fluke FLUKE-77-3 79510405 CAL 9/26/01 9/26/02 Peak Power Meter HP 8900C 2131A00545 CHAR 1/26/01 1/26/02 Digital Thermometer Fluke 2166A 42032 CAL 1/16/02 1/16/03 Thermometer Traulsen SK-128 CHAR 1/22/02 1/22/03 X Temp/Humidity gauge EXTech 44577F E000901 CHAR 1/22/02 1/22/03 Frequency Counter HP 5352B 2632A00165 CAL 11/28/01 11/28/02 Power Sensor Agilent Technologies 84811A 2551A02705 CAL 1/26/01 1/26/02 Injection Probe Fischer Custom Communications F-120-9A 270 CAL 6/1/01 6/1/02 TIMCOTIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: SCIENTIFIC TOYS, LTD. FCC ID: BY3E894 REPORT #: S\SCIENTIF\837HT2\837HT2TestReport.doc Page 3 of 8 DEVICE MFGR MODEL SERNO CAL/CHAR DATE DUE DATE or STATUS Service Monitor IFR FM/AM 500A 5182 CAL 11/22/00 11/22/01 Comm. Serv. Monitor IFR FM/AM 1200S 6593 CAL 11/12/99 11/12/00 Signal Generator HP 8640B 2308A21464 CAL 11/15/01 11/15/02 Modulation Analyzer HP 8901A 3435A06868 CAL 9/5/01 9/5/02 Power Line Coupling/ Decoupling Network Fischer Custom Communications FCC-801-M2- 16A 01048 CAL 8/29/01 8/29/02 Power Line Coupling/ Decoupling Network Fischer Custom Communications FCC-801-M3- 16A 01060 CAL 8/29/01 8/29/02 VHF/UHF Current Probe Fischer Custom Communications F-52 130 CAL 8/30/01 8/30/02 Passive Impedance Adapter Fischer Custom Communications FCC-801-150- 50-CDN 01117 & 01118 CAL 8/29/01 8/29/02 Radiating Field Coil Fischer Custom Communications F-1000-4- 8/9/10-L-1M 9859 CAL 10/15/98 10/15/99 Near Field Probe HP HP11940A 2650A02748 CHAR 2/1/01 2/1/02 BandReject Filter Lorch Microwave 5BR4-2400/ 60-N Z1 CHAR 3/2/01 3/2/02 Ban…

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