Test Report

FCC ID: OYK-TX027145-0407

Test Report

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FCCID_547595

Silverlit Toys Manufactory Ltd. Application For Certification (FCC ID: OYK-TX027145-0407) Transmitter Sample Description : XP Controller Model : Not Applicable We hereby certify that the sample of the above item is considered to comply with the requirements of FCC Part 15, Subpart C for Intentional Radiator, mention 47 CFR [12-8-2003] 0509473 BC/at May 25, 2005 • The test results reported in this report shall refer only to the sample actually tested and shall not refer or be deemed to refer to bulk from which such a sample may be said to have been obtained. • This report shall not be reproduced except in full without prior authorization from Intertek Testing Services Hong Kong Limited. • The evaluation data of the report will be kept for 3 years from the date of issuance. FCC ID : OYK-TX027145-0407

INTERTEK TESTING SERVICES LIST OF EXHIBITS INTRODUCTION EXHIBIT 1: General Description EXHIBIT 2: System Test Configuration EXHIBIT 3: Emission Results EXHIBIT 4: Equipment Photographs EXHIBIT 5: Product Labelling EXHIBIT 6: Technical Specifications EXHIBIT 7: Instruction Manual EXHIBIT 8: Miscellaneous Information FCC ID: OYK-TX027145-0407 i

INTERTEK TESTING SERVICES MEASUREMENT/TECHNICAL REPORT Silverlit Toys Manufactory Ltd. - MODEL: Not Applicable FCC ID: OYK-TX027145-0407 May 25, 2005 This report concerns (check one:) Original Grant X Class II Change Equipment Type: Low Power Transmitter (example: computer, printer, modem, etc.) Deferred grant requested per 47 CFR 0.457(d)(1)(ii)? Yes No X If yes, defer until: date Company Name agrees to notify the Commission by: date of the intended date of announcement of the product so that the grant can be issued on that date. Transition Rules Request per 15.37? Yes No X If no, assumed Part 15, Subpart C for intentional radiator - the new 47 CFR [12-8- 2003 Edition] provision. Report prepared by: Billy Chow Intertek Testing Services 2/F., Garment Center, 576, Castle Peak Road, HONG KONG Phone: 852-2173-8502 Fax: 852-2742-9149 FCC ID: OYK-TX027145-0407 ii

INTERTEK TESTING SERVICES Table of Contents 1.0 General Description ................................................................................................ 2 1.1 Product Description ............................................................................................. 2 1.2 Related Submittal(s) Grants................................................................................. 2 1.3 Test Methodology ................................................................................................ 3 1.4 Test Facility ......................................................................................................... 3 2.0 System Test Configuration ..................................................................................... 5 2.1 Justification.......................................................................................................... 5 2.2 EUT Exercising Software ..................................................................................... 5 2.3 Special Accessories ............................................................................................ 5 2.4 Equipment Modification ....................................................................................... 6 2.5 Support Equipment List and Description .............................................................. 6 3.0 Emission Results .................................................................................................... 8 3.1 Field Strength Calculation.................................................................................... 9 3.1 Field Strength Calculation (cont’d) ..................................................................... 10 3.2 Radiated Emission Configuration Photograph .................................................... 11 3.3 Radiated Emission Data .................................................................................... 12 4.0 Equipment Photographs....................................................................................... 15 5.0 Product Labelling .................................................................................................. 17 6.0 Technical Specifications....................................................................................... 19 7.0 Instruction Manual ................................................................................................ 21 8.0 Miscellaneous Information ................................................................................... 23 8.1 Measured Bandwidth......................................................................................... 24 8.2 Discussion of Pulse Desensitization................................................................... 25 8.3 Calculation of Average Factor............................................................................ 26 8.4 Emission Test Procedures ................................................................................ 27 8.4 Emission Test Procedures (Cont’d).................................................................... 28 FCC ID: OYK-TX027145-0407 iii

INTERTEK TESTING SERVICES List of attached file Exhibit type File Description filename Test Report Test Report report.pdf Operation Description Technical Description descri.pdf Test Setup Photo Radiated Emission radiated photos.doc Test Report Bandwidth Plot bw.pdf External Photo External Photo external photos.doc Internal Photo Internal Photo internal photos.doc Block Diagram Block Diagram block.pdf Schematics Circuit Diagram circuit.pdf ID Label/Location Label Artwork and Location label.pdf User Manual User Manual manual.pdf Test Report Average Factor af.pdf FCC ID: OYK-TX027145-0407 iv

INTERTEK TESTING SERVICES EXHIBIT 1 GENERAL DESCRIPTION FCC ID: OYK-TX027145-0407 1

INTERTEK TESTING SERVICES 1.0 General Description 1.1 Product Description The equipment under test (EUT) is a transmitter for a RC Submarine operating at 27.145 MHz which is controlled by a crystal. The EUT is powered by a 9V battery. The EUT has two switches, two control levers and four buttons. The power switch is used to switch on and off the device. The band selection switch is used to select the communication channel with the RC Submarine. There has three channels available for the user. Each channel provides a particular control coding used to control certain submarine. The left and right control levers are used to control the propellers on the RC Submarine, push both levers up for forward driving, pull both levers down for backward driving and push or pull either one of the lever up or down for turning left and right directions. The button on the top left side is used to control the Submarine to submerge in the water and the button on the top right side is used to control the RC Submarine to emerge on the water. The button under the power switch is used to switch on and off the headlight on the Submarine. The button under the band selection switch is used to stop the Submarine while submerging or emerging. The brief circuit description is saved with filename : descri.pdf 1.2 Related Submittal(s) Grants The receiver for this transmitter is exempted from the Part 15 technical rules per 15.101(b). FCC ID: OYK-TX027145-0407 2

INTERTEK TESTING SERVICES 1.3 Test Methodology The radiated emission measurements were performed according to the procedures in ANSI C63.4 (2001). All measurements were performed in Open Area Test Sites. Preliminary scans were performed in the Open Area Test Sites only to determine worst case modes. All Radiated tests were performed at an antenna to EUT distance of 3 meters, unless stated otherwise in the "Justification Section" of this Application. 1.4 Test Facility The open area test site and conducted measurement facility used to collect the emission data is located at Garment Centre, 576 Castle Peak Road, Kowloon, Hong Kong. This test facility and site measurement data have been fully placed on file with the FCC. FCC ID: OYK-TX027145-0407 3

INTERTEK TESTING SERVICES EXHIBIT 2 SYSTEM TEST CONFIGURATION FCC ID: OYK-TX027145-0407 4

INTERTEK TESTING SERVICES 2.0 System Test Configuration 2.1 Justification The system was configured for testing in a typical fashion (as a customer would normally use it), and in the confines as outlined in ANSI C63.4 (2001). The EUT was powered by a new 9V battery during test. For maximizing emissions, the EUT was rotated through 360°, the antenna height was varied from 1 meter to 4 meters above the ground plane, and the antenna polarization was changed. This step by step procedure for maximizing emissions led to the data reported in Exhibit 3.0. The unit was operated standalone and placed in the center of the turntable. The equipment under test (EUT) was configured for testing in a typical fashion (as a customer would normally use it). The EUT was placed on a turn table, and the Antenna of EUT was fully extended, which enabled the engineer to maximize emissions through its placement in the three orthogonal axes. For simplicity of testing, the unit was wired to transmit continuously. 2.2 EUT Exercising Software There was no special software to exercise the device. 2.3 Special Accessories There are no special accessories necessary for compliance of this product. FCC ID: OYK-TX027145-0407 5

INTERTEK TESTING SERVICES 2.4 Equipment Modification Any modifications installed previous to testing by Silverlit Toys Manufactory Ltd. will be incorporated in each production model sold/leased in the United States. No modifications were installed by Intertek Testing Services. 2.5 Support Equipment List and Description This product was tested in a standalone configuration. All the items listed under section 2.0 of this report are Confirmed by: Billy Chow Senior Supervisor Intertek Testing Services Agent for Silverlit Toys Manufactory Ltd. Signature May 25, 2005 Date FCC ID: OYK-TX027145-0407 6

INTERTEK TESTING SERVICES EXHIBIT 3 EMISSION RESULTS FCC ID: OYK-TX027145-0407 7

INTERTEK TESTING SERVICES 3.0 Emission Results Data is included worst case configuration (the configuration which resulted in the highest emission levels). A sample calculation, configuration photographs and data tables of the emissions are included. FCC ID: OYK-TX027145-0407 8

INTERTEK TESTING SERVICES 3.1 Field Strength Calculation The field strength is calculated by adding the reading on the Spectrum Analyzer to the factors associated with preamplifiers (if any), antennas, cables, pulse desensitization and average factors (when specified limit is in average and measurements are made with peak detectors). A sample calculation is included below. FS = RA + AF + CF - AG + PD + AV where FS = Field Strength in dBµV/m RA = Receiver Amplitude (including preamplifier) in dBµV CF = Cable Attenuation Factor in dB AF = Antenna Factor in dB AG = Amplifier Gain in dB PD = Pulse Desensitization in dB AV = Average Factor in -dB In the radiated emission table which follows, the reading shown on the data table may reflect the preamplifier gain. An example of the calculations, where the reading does not reflect the preamplifier gain, follows: FS = RA + AF + CF - AG + PD + AV FCC ID: OYK-TX027145-0407 9

INTERTEK TESTING SERVICES 3.1 Field Strength Calculation (cont’d) Example Assume a receiver reading of 62.0 dBµV is obtained. The antenna factor of 7.4 dB and cable factor of 1.6 dB is added. The amplifier gain of 29 dB is subtracted. The pulse desensitization factor of the spectrum analyzer was 0 dB, and the resultant average factor was -10 dB. The net field strength for comparison to the appropriate emission limit is 32 dBµV/m. This value in dBµV/m was converted to its corresponding level in µV/m. RA = 62.0 dBµV AF = 7.4 dB CF = 1.6 dB AG = 29.0 dB PD = 0 dB AV = -10 dB FS = 62 + 7.4 + 1.6 - 29 + 0 + (-10) = 32 dBµV/m Level in µV/m = Common Antilogarithm [(32 dBµV/m)/20] = 39.8 µV/m FCC ID: OYK-TX027145-0407 10

INTERTEK TESTING SERVICES 3.2 Radiated Emission Configuration Photograph Worst Case Radiated Emission 54.290 MHz For electronic filing, the worst case radiated emission configuration photograph is saved with filename: radiated photos.doc FCC ID: OYK-TX027145-0407 11

INTERTEK TESTING SERVICES 3.3 Radiated Emission Data The data on the following page lists the significant emission frequencies, the limit and the margin of compliance. Numbers with a minus sign are below the limit. Judgement: Passed by 0.2 dB TEST PERSONNEL: Signature Anthony K. M. Chan, Compliance Engineer Typed/Printed Name May 25, 2005 Date FCC ID: OYK-TX027145-0407 12

INTERTEK TESTING SERVICES Applicant: Silverlit Toys Manufactory Ltd. Date of Test: May 19, 2005 Model: Not Applicable (TX) Mode: TX Sample: 2/2 Table 1 Radiated Emissions Pre- Antenna Average Limit at Frequency Reading Amp factor Factor Net at 3m 3m Margin Polarization (MHz) (dBµV) (dB) (dB) (dB) (dBµV/m) (dBµV/m) (dB) V 27.145 66.4 16 15.4 21.4 44.4 80.0 -35.6 V 54.290 44.8 16 11.0 - 39.8 40.0 -0.2 H 81.435 38.6 16 7.0 - 29.6 40.0 -10.4 H 108.580 31.0 16 14.0 - 29.0 43.5 -14.5 H 135.713 35.6 16 14.0 - 33.6 43.5 -9.9 H 162.858 27.4 16 16.0 - 27.4 43.5 -16.1 H 190.003 27.0 16 16.0 - 27.0 43.5 -16.5 Notes: 1. Peak Detector Data unless otherwise stated. 2. All measurements were made at 3 meter. Harmonic emissions not detected at the 3 meter distance were measured at 0.3 meter and an inverse proportional extrapolation was performed to compare the signal level to the 3 meter limit. No other harmonic emissions than those reported were detected at a test distance of 0.3 meter. 3. Negative value in the margin column shows emission below limit. 4. Horn antenna are used for the emission over 1000MHz. *Emission within the restricted band meets the requirement of part 15.205. The corresponding limit as per 15.209 is based on Quasi peak detector data for frequencies below 1000 MHz and peak detector data with average factor for frequencies over 1000 MHz. Test Engineer: Anthony K. M. Chan FCC ID: OYK-TX027145-0407 13

INTERTEK TESTING SERVICES EXHIBIT 4 EQUIPMENT PHOTOGRAPHS FCC ID: OYK-TX027145-0407 14

INTERTEK TESTING SERVICES 4.0 Equipment Photographs For electronic filing, the photographs are saved with filename: external photos.doc and internal photos.doc FCC ID: OYK-TX027145-0407 15

INTERTEK TESTING SERVICES EXHIBIT 5 PRODUCT LABELLING FCC ID: OYK-TX027145-0407 16

INTERTEK TESTING SERVICES 5.0 Product Labelling For electronic filing, the FCC ID label artwork and the label location are saved with filename: label.pdf FCC ID: OYK-TX027145-0407 17

INTERTEK TESTING SERVICES EXHIBIT 6 TECHNICAL SPECIFICATIONS FCC ID: OYK-TX027145-0407 18

INTERTEK TESTING SERVICES 6.0 Technical Specifications For electronic filing, the block diagram and schematics are saved with filename: block.pdf and circuit.pdf FCC ID: OYK-TX027145-0407 19

INTERTEK TESTING SERVICES EXHIBIT 7 INSTRUCTION MANUAL FCC ID: OYK-TX027145-0407 20

INTERTEK TESTING SERVICES 7.0 Instruction Manual For electronic filing, a preliminary copy of the Instruction Manual is saved with filename: manual.pdf FCC ID: OYK-TX027145-0407 21

INTERTEK TESTING SERVICES EXHIBIT 8 MISCELLANEOUS INFORMATION FCC ID: OYK-TX027145-0407 22

INTERTEK TESTING SERVICES 8.0 Miscellaneous Information This miscellaneous information includes details of the measured bandwidth, the test procedure and calculation of factors such as pulse desensitization and averaging factor. FCC ID: OYK-TX027145-0407 23

INTERTEK TESTING SERVICES 8.1 Measured Bandwidth The plot saved in bw.pdf which shows the fundamental emission is confined in the specified band. And it also shows that the emission is at least 37 dB below the carrier level at the band edge (26.96 and 27.28 MHz). It meets the requirement of Section 15.227(b). Figure 8.1 Bandwidth FCC ID: OYK-TX027145-0407 24

INTERTEK TESTING SERVICES 8.2 Discussion of Pulse Desensitization The determination of pulse desensitivity was made in accordance with Hewlett Packard Application Note 150-2, Spectrum Analysis ... Pulsed RF. The effective period (Teff) was approximately 75 µs for a digital "1" bit, as shown in the plots of Exhibit 8.3. With a resolution bandwidth (3 dB) of 100 kHz, the pulse desensitivity factor was 0 dB. FCC ID: OYK-TX027145-0407 25

INTERTEK TESTING SERVICES 8.3 Calculation of Average Factor (Worst-case : Band Channel C, push left lever up, pull right lever down and press right top button) Averaging factor in dB = 20 log (duty cycle) The specification for output field strengths in accordance with the FCC rules specify measurements with an average detector. During testing, a spectrum analyzer incorporating a peak detector was used. Therefore, a reduction factor can be applied to the resultant peak signal level and compared to the limit for measurement instrumentation incorporating an average detector. The time period over which the duty cycle is measured is 100 milliseconds, or the repetition cycle, whichever is a shorter time frame. The worst case (highest percentage on) duty cycle is used for the calculation. The duty cycle is measured by placing the spectrum analyzer in zero scan (receiver mode) and linear mode at maximum bandwidth (3 MHz at 3 dB down) and viewing the resulting time domain signal output from the analyzer on a Tektronix oscilloscope. The oscilloscope is used because of its superior time base and triggering facilities. A plot of the worst-case duty cycle as detected in this manner are saved with filename: af.pdf The duty cycle is simply the on-time divided by the period: The duration of one cycle = 62.6 ms Effective period of the cycle = 150 µs x 2 + 187 µs + 563 µs x 2 + 262 µs x 5 + 225 µs x 8 + 75 µs x 5 + 112 µs x 2 = 5.322 ms DC = 5.322 ms / 62.6 ms = 0.08502 or 8.502% Therefore, the averaging factor is found by 20 log10 0.08502 = 21.4 dB FCC ID: OYK-TX027145-0407 26

INTERTEK TESTING SERVICES 8.4 Emissions Test Procedures The following is a description of the test procedure used by Intertek Testing Services in the measurements of transmitters operating under Part 15, Subpart C rules. The test set-up and procedures described below are designed to meet the requirements of ANSI C63.4 - 2001. The transmitting equipment under test (EUT) is placed on a wooden turntable which is four feet in diameter and approximately one meter in height above the ground plane. The antenna of EUT was fully extended. During the radiated emissions test, the turntable is rotated and any cables leaving the EUT are manipulated to find the configuration resulting in maximum emissions. The antenna height and polarization are varied during the testing to search for maximum signal levels. Detector function for radiated emissions is in peak mode. Average readings, when required, are taken by measuring the duty cycle of the equipment under test and subtracting the corresponding amount in dB from the measured peak readings. A detailed description for the calculation of the average factor can be found in Exhibit 8.3. The frequency range scanned is from the lowest radio frequency signal generated in the device which is greater than 9 kHz to the tenth harmonic of the highest fundamental frequency or 40 GHz, whichever is lower. For line conducted emissions, the range scanned is 150 kHz to 30 MHz. FCC ID: OYK-TX027145-0407 27

INTERTEK TESTING SERVICES 8.4 Emissions Test Procedures (cont'd) The EUT is warmed up for 15 minutes prior to the test. AC power to the unit is varied from 85% to 115% nominal and variation in the fundamental emission field strength is recorded. If battery powered, a new, fully charged battery is used. Conducted measurements are made as described in ANSI C63.4 - 2001. The IF bandwidth used for measurement of radiated signal strength was 10 kHz for emission below 30 MHz and 120 kHz for emission from 30 MHz to 1000 MHz. Where pulsed transmissions of short enough pulse duration warrant, a greater bandwidth is selected according to the recommendations of Hewlett Packard Application Note 150-2. A discussion of whether pulse desensitivity is applicable to this unit is included in this report (See Exhibit 8.2). Above 1000 MHz, a resolution bandwidth of 1 MHz is used. Transmitter measurements are normally conducted at a measurement distance of three meters. However, to assure low enough noise floor in the restricted bands and above 1 GHz, signals are acquired at a distance of one meter or less. All measurements are extrapolated to three meters using inverse scaling, but those measurements taken at a closer distance are so marked. When determining the test result, the Measurement Uncertainty of the test has been considered. FCC ID: OYK-TX027145-0407 28


Document Created: 2005-05-25 15:20:07
Document Modified: 2005-05-25 15:20:07
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