AEK971249RR/C Toy Receiver (Superhetrodyne)

STATEMENT OF MICHAEL A. NICOLAY In Connection With APPLICATION FOR CERTIFICATION WAVE RIPPER, 7.2VTMH, JET BOAT R/C RECEIVER FCC ID: AEK971249R The attached are in support of an application for Certification for the Taiyo Kogyo, Co., Ltd., Wave Ripper Jet Boat Receiver. I am an Engineer, an employee in the firm of Carl T. Jones Corporation, with offices located in Springfield, Virginia. My education and experience are a matter of record with the Federal Communications Commission. All of the measurements contained in this test report were performed by me or under my supervision, and I attest to the accuracy of each. I submit that, to the best of my knowledge, the test sample meets the technical standards set forth in the Commission's Rules and Regulations. DATED: February 2, 1999 Michael A. Nicolay Carl T. Jones Corporation 7901 Yarnwood Court Springfield, Virginia, 22304 (703) 569-7704 [email protected]

STATEMENT OF MICHAEL A. NICOLAY In Connection With APPLICATION FOR CERTIFICATION WAVE RIPPER, 7.2VTMH, JET BOAT R/C RECEIVER FCC ID: AEK971249R The attached are in support of an application for Certification for the Taiyo Kogyo, Co., Ltd., Wave Ripper Jet Boat Receiver. I am an Engineer, an employee in the firm of Carl T. Jones Corporation, with offices located in Springfield, Virginia. My education and experience are a matter of record with the Federal Communications Commission. All of the measurements contained in this test report were performed by me or under my supervision, and I attest to the accuracy of each. I submit that, to the best of my knowledge, the test sample meets the technical standards set forth in the Commission's Rules and Regulations. DATED: February 2, 1999 Michael A. Nicolay Carl T. Jones Corporation 7901 Yarnwood Court Springfield, Virginia, 22304 (703) 569-7704 [email protected]

EXPOSITORY STATEMENT/DESCRIPTION The AEK971249R "Waveripper, 7.2VTMH, JET BOAT" is a superheterodyne receiver. The RF input signal enters the LSI (Large Scale Integration) IC1 (TAIYO_98-R) via a permanently attached wire antenna. The antenna length is approximately 15". The superheterodyne receiver operates with a LO frequency of 48.86 MHz to create an IF frequency of 1 MHz, 89.86 MHz carrier frequency minus 48.86 MHz LO. The LO oscillator frequency is generated by the following external circuit components: - X1 - 48.86 MHz Xtal - X2 - 2.2 uH Coil - X5 - 56k resistor - X3 - 0.68 uH Coil - X4 - 100 pF Capacitor The LSI IC then extracts, internally, the digital modulation control codes from the signal and supplies these control signals to the receivers motor drives for forward/reverse (propeller)and left/right vehicle functions (rudder). The digital control codes are then delivered to the motor controls via the two digital comparitor circuits. These comparitors then control the one electric motor (propeller),to allow the vehicle (toy boat receiver) to advance forward and reverse (left/right), and the magnetic drive circuit (rudder) to allow left and right turns. The receiver system operates on 7.2 VDC, supplied via one 7.2 VDC battery assembly. No external ground system is needed or used with this device.

Category not applicable for this application .

FCC ID:AEK971249R 1 APPLICATION FOR CERTIFICATION ON BEHALF OF TAIYO KOGYO Co. LTD. WAVE RIPPER, 7.2VTMH, JET BOAT R/C RECEIVER FCC ID:AEK971249R February 2, 1999 I. INTRODUCTION This measurement report is submitted in support of an Application for Certification in accordance with Part 2, Subpart J and Part 15, Subpart B (effective 6/23/89) of the Federal Communications Commission's Rules and Regulations. The equipment under test (EUT) is a superhetrodyne receiver which decodes commands from a separate handheld transmitter. This receiver operates at a fixed frequency within the band from 49.82 to 49.90 MHz and is powered by one 7.2 volt battery. The EUT is identified as the Hot Rocker Receiver (FCC ID:AEK971249R). Operation under the transition provisions of Paragraph 15.37 is not requested for this device. The measurements contained in this report demonstrate compliance with the limitations in effect since 6/23/89. II. INFORMATION REQUIRED FOR CERTIFICATION Paragraph(s) (1) 2.1033(a)This application for certification is filed on FCC Form 731 with all questions answered. An application fee of $365 is attached. 2.1033(b)(1)The full name and mailing address of the manufacturer of the device and applicant for certification is: Taiyo Kogyo Co., Ltd. No. 1-23-17, Higashiyotsugi Katsushika-ku, Tokyo Japan FCC ID:AEK971249R 2 (2)The FCC Identifier of the device is AEK971249R. (3)A copy of the installation and operating instructions to be furnished to the user, or a draft copy of such instructions, is included in this exhibits section of this application. (4)This device is a superregenerative receiver powered by one 7.2 volt battery. It is designed to operate on a fixed frequency in the band 49.82 to 49.90 MHz. (5)A block diagram of the device is included in the exhibits section of this application. Schematics are also provided in the exhibits section of this application. . (6)A report of measurements is included with this report. (7)Photographs of this device showing its general appearance, the FCC Label and its placement are included in the exhibits section of this application. (8)This equipment is a stand-alone unit. No peripherals or accessories are involved. (9)Certification under the transition provisions of Paragraph 15.37 is not being requested for this device. (10) N/A. III. GENERAL TEST CONDITIONS AND PROCEDURES Measurement procedures were used as outlined in MP-1, as specified in Part 15.31, except as noted herein. The open field tests were performed on a three-meter range maintained by Carl T. Jones Corporation at the Springfield facility. Complete description and measurement data for the site have been placed on file with the Commission. Carl T. Jones Corporation is listed by the FCC as a facility available to do measurement work for others on a contract basis. Prior to open-field testing, the equipment was placed in a shielded enclosure and scanned at a distance of 1 meter to determine its emission characteristics. IV. RADIATED EMISSION MEASUREMENTS The receiver was assembled on a rotatable wooden test stand approximately one meter in height. The receiver's antenna was fully extended. Because of the superregenerative nature of the receiver, an FCC ID:AEK971249R 3 unmodulated RF signal was transmitted to it during testing in order to insure proper functionality. The emission spectrum was examined from 30 MHz to 1000 MHz using a Hewlett-Packard 8568B spectrum analyzer and Compliance Design "Roberts" tuned dipole antennas. At each emission frequency, the EUT was rotated 360 degrees, and the antenna was raised and lowered from one to four meters to determine the maximum emission levels. Measurements were taken using both horizontal and vertical antenna polarizations. The spectrum analyzer's 6 dB bandwidth was set to 100 kHz. The analyzer was operated in the CISPR quasi-peak detection mode for measurements of all emissions less than 1000 MHz. No post-detector video filters were used. The EUT was investigated in three orthogonal planes. There were no detectable emissions observed during the EUT's initial scan. Test Results: Because there were no detectable emissions observed during the 1-meter initial scan, the EUT was not taken to the open-area-test-site. See attached spectral plots. The EUT complied with the FCC Limits. Note: SEE ENCLOSED INITIAL FREQUENCY SCAN SPECTRAL PLOTS. Six spectral plots are included. The spectral plots are: 1. Spectrum at f o , CW carrier on, EUT on (RBW = 300Hz) 2. Spectrum at f o , CW carrier on, EUT on (RBW = 3kHz) 3. Spectrum at f o , CW carrier on, EUT on (RBW=10kHz) 4. Spectrum at 2 f o , CW carrier on, EUT on (RBW = 10kHz) 5. Spectrum at 3 f o , CW carrier on, EUT on (RBW = 10kHz) 6. Spectrum through 10 f o , CW carrier on, EUT on (RBW = 100kHz) The actual field intensity in decibels above one microvolt per meter (dB μ V/m) is determine by FCC ID:AEK971249R 4 algebraically adding the measured level in dB μ V, the antenna factor (dB), and the cable loss (dB) at the appropriate frequency. FI a (dB μ V/m) = FI m (dB μ V) + AF (dB) + CL (dB) FI a = Actual Field Intensity FI m = Measured Field Intensity AF = Antenna Factor CL = Cable Loss As a sample calculation, assume a particular device emits a signal with a frequency of 49.96 MHz. The received signal level is measured as 42.0 dB μ V. The total attenuation factor (antenna factor plus cable loss) for 49.96 MHz is 4.7 dB. The actual radiated field is calculated as follows: 42 dB μ V + 4.7 = 46.7 dB μ V/m In no case did the radiated emissions exceed the limits specified in Paragraph 15.109(a) of the Commission's Rules. V. POWER LINE CONDUCTED EMISSIONS MEASUREMENTS Measurements of the power line conducted emissions were not performed since the EUT has no means for connection to the public utility power grid.

TABLE 1 FIELD STRENGTH RADIATED EMISSIONS DATA SHEET ANTENNA FACTORFCC EMISSIONANTENNAEMISSIONANDEMISSIONLIMIT FREQUENCY POLARITYLEVELCABLE LOSSLEVEL(3 METERS) (MHZ)(H,V)(dBuV)(dB)(dBuV/m)(dBuV/m) Note: No detectable emissions were observed during the 1 meter scan, therefore the EUT was not taken to the open-area-test-site. See attached spectral plots. CLIENT:TAIYO KOGYO FCC ID:AEK971249R MODEL:7.2VTMH JET BOAT TEST DATE:12/01/98 TEST ENGINEER:Michael A. Nicolay

Not applicable , the EUT was not photographed on the OATS because the EUT was not taken to the OATS because no emissions were detected during the 1 meter scan. The EUT does not require conducted measurements because it's battery operated.