N2T3670Remote Control Car - TX

Circuit Description for Playmobil 27MHz Transmitter FCC ID: N2T3670 Q1 and Q2 form a multivibrator that is actuated by SW1. Q3 and Q4 are pulse modifying circuits that are activated by SW2. Q5 is the crystal oscillator circuit which is transformer coupled to Q6 which is an RF amplifier and AM modulator for the pulses formed by Q1 thru Q4. L3 and C21,C22 C23 C24 and L4 form the antenna matching and harmonic suppression components Q7 and Q8 are the amplification and impedance matching parts for the modulation pulses. SW3 is the power on switch. Energy is supplied by 12VDC. Zener diode ZD1 is used reduced this to 5.6 V which is used by Q1 thru Q5. The antenna is a fixed unremovable type. No external ground connection is available only that of the interior pcb traces.

TABLE OF CONTENTS APPLICANT: GEOBRA BRANDSTATTER GMbH &CO. KG FCC ID: N2T3670 TEST REPORT CONTAINING: PAGE 1......TEST EQUIPMENT LIST AND TEST PROCEDURE PAGE 2......TEST PROCEDURE CONTD. PAGE 3......RADIATION INTERFERENCE TEST DATA PAGE 4......OCCUPIED BANDWIDTH TEST DATA PAGE 5......OCCUPIED BANDWIDTH PLOT - CW EXHIBITS CONTAINING: EXHIBIT 1............BLOCK DIAGRAM EXHIBIT 2A-B.........SCHEMATIC EXHIBIT 3............INSTRUCTION MANUAL EXHIBIT 4............SAMPLE OF FCC ID LABEL EXHIBIT 5............LOCATION OF FCC ID LABEL EXHIBIT 6............EXTERNAL PHOTO - FRONT SIDE EXHIBIT 7............EXTERNAL PHOTO - BACK SIDE EXHIBIT 8............INTERNAL PHOTO - COMPONENT SIDE EXHIBIT 9............INTERNAL PHOTO - COPPER SIDE EXHIBIT 11...........CIRCUIT DESCRIPTION APPLICANT: GEOBRA BRANDSTATTER GMbH &CO. KG FCC ID: N2T3670 REPORT #: G\GEOBRA\300G1\300G1RPT.doc PAGE: TABLE OF CONTENTS LIST TEST EQUIPMENT LIST 1. Spectrum Analyzer: HP 8566B-Opt 462, S/N 3138A07786, w/ preselector HP 85685A, S/N 3221A01400, Quasi-Peak Adapter HP 8565OA, S/N 3303A01690 & Preamplifier HP 8449B-OPT H02, S/N 3008A00372 2. Biconnical Antenna: Eaton Model 94455-1, S/N 1057 3. Biconnical Antenna: Electro-Metrics Model BIA-25, S/N 1171 4. Log-Periodic Antenna: Electro-Metrics Model EM-6950, S/N 632 5. Log-Periodic Antenna: Electro-Metrics Model LPA-30, S/N 409 6. Double-Ridged Horn Antenna: Electro-Metrics Model RGA-180, 1-18 GHz, S/N 2319 7. 18-26.3GHz Systron Donner Standard Gain Horn #DBE-520-20 8. Horn 40-60GHz: ATM Part #19-443-6R 9. Line Impedance Stabilization Network: Electro-Metrics Model ANS-25/2, S/N 2604 10. Temperature Chamber: Tenney Engineering Model TTRC, S/N 11717-7 11. Frequency Counter: HP Model 5385A, S/N 3242A07460 12. Peak Power Meter: HP Model 8900C, S/N 2131A00545 13. Open Area Test Site #1-3meters 14. Signal Generator: HP 8640B, S/N 2308A21464 15. Signal Generator: HP 8614A, S/N 2015A07428 16. Passive Loop Antenna: EMCO Model 6512, 9KHz to 30MHz, S/N 9706-1211 17. Dipole Antenna Kit: Electro-Metrics Model TDA-30/1-4, S/N 153 18. AC Voltmeter: HP Model 400FL, S/N 2213A14499 19. Digital Multimeter: Fluke Model 8012A, S/N 4810047 20. Digital Multimeter: Fluke Model 77, S/N 43850817 21. Oscilloscope: Tektronix Model 2230, S/N 300572 TEST PROCEDURE GENERAL: This report shall NOT be reproduced except in full without the written approval of TIMCO ENGINEERING, INC. RADIATION INTERFERENCE: The test procedure used was ANSI STANDARD C63.4-1992 using a HEWLETT PACKARD spectrum analyzer with a prese- lector. The bandwidth of the spectrum analyzer was 100 kHz with an appropriate sweep speed. The analyzer was calibrated in dB above a microvolt at the output of the antenna. The resolution bandwidth was 100KHz and the video bandwidth was 300KHz. The ambient temperature of the UUT was 90º with a humidity of 35%. APPLICANT: GEOBRA BRANDSTATTER GMbH &CO. KG FCC ID: N2T3670 REPORT #: G\GEOBRA\300G1\300G1RPT.doc PAGE #: 1 APPLICANT: GEOBRA BRANDSTATTER GMbH &CO. KG FCC ID: N2T3670 TEST PROCEDURES CONTINUED FORMULA OF CONVERSION FACTORS: The Field Strength at 3m was estab- lished by adding the meter reading of the spectrum analyzer (which is set to read in units of dBuV) to the antenna correction factor sup- plied by the antenna manufacturer. The antenna correction factors are stated in terms of dB. The gain of the Preselector was accounted for in the Spectrum Analyzer Meter Reading. Example: Freq (MHz) METER READING + ACF = FS 33 20 dBuV + 10.36 dB = 30.36 dBuV/m @ 3m APPLICANT: GEOBRA BRANDSTATTER GMbH &CO. KG FCC ID: N2T3670 REPORT #: G\GEOBRA\300G1\300G1RPT.doc PAGE #: 2 APPLICANT: GEOBRA BRANDSTATTER GMbH &CO. KG FCC ID: N2T3670 NAME OF TEST: RADIATION INTERFERENCE RULES PART NO.: 15.227 REQUIREMENTS: CARRIER FREQUENCY WILL NOT EXCEED 80 dBuV/m AT 3M. OUT-OF-BAND EMISSIONS SHALL NOT EXCEED: 30 - 88 MHz 40.0 dBuV/M MEASURED AT 3 METERS 88 - 216 MHz 43.5 dBuV/M 216 - 960 MHz 46.0 dBuV/M ABOVE 960 MHz 54.0 dBuV/M TEST DATA: Emission Frequency MHz Meter Reading dBuv Ant. Polarity Coax Loss dB Correction Factor dB Field Strength dBuv/m Margin dB 27.20 65.2 V 0.31 11.72 77.23 2.77 54.40 15.7 V 0.84 9.57 26.11 13.89 81.60 21.7 V 1.06 12.14 34.90 5.10 108.80 14.6 V 1.24 9.34 25.18 18.32 136.00 12.8 V 1.34 13.79 27.93 15.57 163.20 12.2 V 1.51 16.78 30.49 13.01 190.40 19.1 H 1.72 14.16 34.98 8.52 217.60 16.4 H 1.87 12.55 30.82 15.18 244.80 20.2 H 1.98 13.98 36.16 9.84 272.00 21.5 H 2.09 15.19 38.78 7.22 SAMPLE CALCULATION: FSdBuV/m = MR(dBuV) + ACFdB. TEST PROCEDURE: The procedure used was ANSI STANDARD C63.4-1992. The spectrum was scanned from 30 MHz to 1000 MHz. When an emission was found, the table was rotated to produce the maximum signal strength. The antenna was placed in both the horizontal and vertical planes and the worse case emissions were reported. The UUT was tested in 3 orthogonal planes. TEST RESULTS: THE UNIT DOES MEET THE FCC REQUIREMENTS. PERFORMED BY: JOSEPH SCOGLIO DATE: OCTOBER 9, 2001 APPLICANT: GEOBRA BRANDSTATTER GMbH &CO. KG FCC ID: N2T3670 REPORT #: G\GEOBRA\300G1\300G1RPT.doc PAGE #: 3 APPLICANT: GEOBRA BRANDSTATTER GMbH &CO. KG FCC ID: N2T3670 NAME OF TEST: Occupied Bandwidth RULES PART NO.: 15.227 REQUIREMENTS: The field strength of any emissions appearing outside the 26.96-27.28 MHz band shall not exceed 100 uV/m (15.209). THE GRAPH IN PAGE 5 REPRESENTS THE WORSE CASE OCCUPPIED BANDWIDTH EMISSIONS FOR THIS DEVICE. METHOD OF MEASUREMENT: A small sample of the transmitter output was fed into the spectrum analyzer and the attached plot was taken. The vertical scale is set to -10 dBm per division. The horizontal scale is set to 5 kHz per division. TEST RESULTS: The unit DOES meet the FCC requirements. PERFORMED BY: JOSEPH SCOGLIO DATE: OCTOBER 9, 2001 APPLICANT: GEOBRA BRANDSTATTER GMbH &CO. KG FCC ID: N2T3670 REPORT #: G\GEOBRA\300G1\300G1RPT.doc PAGE #: 4