Test Report

FCC ID: 2AHZK731596

Test Report

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FCCID_4250273

GAINMAX LIMITED TEST REPORT SCOPE OF WORK RF TESTING–731596 REPORT NUMBER SZHH01338129-001 ISSUE DATE Apr 03, 2019 PAGES 14 DOCUMENT CONTROL NUMBER FCC ID_b-227 © 2017 INTERTEK

Test Report Intertek Report No.: SZHH01338129-001 GAINMAX LIMITED Application For Certification FCC ID: 2AHZK731596 Product Name: Cars RC 2PK Model: 731596 Transmitter Report No.: SZHH01338129-001 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 [10-1-17] Prepared and Checked by: Approved by: Digitally signed by Jimmy Wen Location: Intertek Testing Services Sign on file Terry Tang Jimmy Wen Senior Engineer Supervisor Date: Apr 03, 2019 • The test results reported in this test 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 is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in accordance with the agreement, for any loss, expense or damage occasioned by the use of this report. Only the Client is authorized to copy or distribute this report. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service must first be approved in writing by Intertek. The observations and test results referenced from this report are relevant only to the sample tested. This report by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program. • For Terms And Conditions of the services, it can be provided upon request. • The evaluation data of the report will be kept for 3 years from the date of issuance. Intertek Testing Services Shenzhen Ltd. Longhua Branch 101，201，Building B，No. 308 Wuhe Avenue, Zhangkengjing Community GuanHu Subdistrict, LongHua District, Shenzhen, People’s Republic of China Tel: (86 755) 8601 6288 Fax: (86 755) 8601 6751 Version: 01 November 2017 Page: 1 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 GENERAL INFORMATION GAINMAX LIMITED MODEL: 731596 FCC ID: 2AHZK731596 Grantee: GAINMAX LIMITED 5/F.,Yat Chau Buildig,262 Des Voeux Road Central Grantee Address: Hong Kong Contact Person: Wang Royce Tel: 852 30190432 Manufacturer: GAINMAX LIMITED 5/F.,Yat Chau Buildig,262 Des Voeux Road Central Manufacturer Address: Hong Kong Model: 731596 Type of EUT: Transmitter Description of EUT: Cars RC 2PK Serial Number: N/A FCC ID : 2AHZK731596 Date of Sample Submitted: Mar 13, 2019 Date of Test: Apr 01, 2019 Report No.: SZHH01338129-001 Report Date: Apr 03, 2019 Temperature: +10 to 40°C Environmental Conidtions: Humidity: 10 to 90% Version: 01 November 2017 Page: 2 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 SUMMARY OF TEST RESULT GAINMAX LIMITED MODEL: 731596 FCC ID: 2AHZK731596 TEST SPECIFICATION REFERENCE RESULTS Maximum Peak Output Power 15.247(b), (c) / RSS-210 A8.4 N/A Hopping Channel Carrier Frequencies 15.247(e) / RSS-210 A8.1 N/A Separation (for 2.4GHz Digital) 20dB Bandwidth of the Hopping Channel 15.247(a) / RSS-210 A8.1 N/A Number of Hopping Frequencies 15.247(e) / RSS-210 A8.1 N/A Average Time of Occupancy of Hopping 15.247(e) / RSS-210 A8.1 N/A Frequency Anteann Conducted Spurious Emissions 15.247(d) / RSS-210 A8.5 N/A Radiated Spurious Emissions 15.247(d) / RSS-210 A8.5 N/A RF Exposure Compliance 15.247(i) / RSS-Gen 5.5 N/A Transmitter Power Line Conducted 15.207 / RSS-Gen 7.2.2 N/A Emissions Transmitter Field Strength (for 27MHz) 15.227 / RSS-310 3.8 Pass Transmitter Field Strength (for 40MHz) 15.229 / RSS-210 A2.7 N/A Transmitter Field Strength, Bandwidth 15.231(a) / RSS-210 A1.1.1 N/A and Timing Requirement (for Remote Control) Transmitter Field Strength, Bandwidth 15.231(e) / RSS-210 A1.1.5 N/A and Timing Requirement (for 433MHz) Transmitter Field Strength and 15.239 / RSS-210 A2.8 N/A Bandwidth Requirement(for 88-108MHz) Transmitter Field Strength and 15.249 / RSS-210 A2.9 N/A Bandwidth Requirement(for 902- 928MHz or 2.4GHz) Transmitter Field Strength and 15.235 / RSS-310 3.9 N/A Bandwidth Requirement (for 49MHz) Receiver / Digital Device Radiated 15.109 / ICES-003 N/A Eissions Digital Device Conducted Emissions 15.107 / ICES-003 N/A Note: 1. The EUT uses a integral antenna, in accordance to section 15.203, is considered sufficient to comply with the provisions of this section. 2. Pursuant to FCC part 15 Section 15.215(c), the 20 dB bandwidth of the emission was contained within the frequency band designated (mentioned as above) which the EUT operated. The effects, if any, from frequency sweeping, frequency hopping, other modulation techniques and frequency stability over excepted variations in temperature and supply voltage were considered. Version: 01 November 2017 Page: 3 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 Table of Contents 1.0 General Description ............................................................................................. 5 1.1 Product Description............................................................................................. 5 1.2 Related Submittal(s) Grants ................................................................................ 5 1.3 Test Methodology ............................................................................................... 5 1.4 Test Facility......................................................................................................... 5 2.0 System Test Configuration............................................................................... 6 2.1 Justification ......................................................................................................... 6 2.2 EUT Exercising Software .................................................................................... 6 2.3 Special Accessories ............................................................................................ 6 2.4 Equipment Modification ....................................................................................... 6 2.5 Support Equipment List and Description .............................................................. 6 3.0 Emission Results ................................................................................................. 7 3.1 Field Strength Calculation ................................................................................... 7 3.2 Radiated Emission Configuration Photograph ..................................................... 8 3.3 Radiated Emission Data...................................................................................... 8 4.0 Equipment Photographs .................................................................................... 10 5.0 Product Labelling ............................................................................................... 10 6.0 Technical Specifications.................................................................................... 10 7.0 Instruction Manual ............................................................................................. 10 8.0 Miscellaneous Information ................................................................................ 10 8.1 Measured Bandwidth ........................................................................................ 11 8.2 Discussion of Pulse Desensitization .................................................................. 12 8.3 Calculation of Average Factor ........................................................................... 12 8.4 Emissions Test Procedures............................................................................... 13 8.4 Emissions Test Procedures (cont'd) .................................................................. 14 9.0 Test Equipment List ............................................................................................ 14 Version: 01 November 2017 Page: 4 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 1.0 General Description 1.1 Product Description The equipment under test (EUT) is a transmitter for a Cars RC 2PK operating at 27.145 MHz which is controlled by a crystal. The EUT is powered by two 1.5V AA batteries. For more detail information pls. refer to the user manual. Antenna Type: integral antenna Type of modulation: Pulse modulation For electronic filing, 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). This is an application for certification of a transmitter for the Cars RC 2PK and there has a receiver which associated with this EUT has been subjected to the FCC SDOC. 1.3 Test Methodology Radiated emission measurements were performed according to the procedures in ANSI C63.10 (2013). Radiated Emission measurement was performed in a Semi-anechoic chamber. Preliminary scans were performed in the Semi-anechoic chamber 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 Semi-anechoic chamber and shielding room used to collect the radiated data and conducted data are Intertek Testing Services Shenzhen Ltd. Longhua Branch and located at 101，201，Building B，No. 308 Wuhe Avenue, Zhangkengjing Community GuanHu Subdistrict, LongHua District, Shenzhen, People’s Republic of China. This test facility and site measurement data have been fully placed on file with File Number: CN1188. Version: 01 November 2017 Page: 5 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 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 C63.10 (2013). The EUT was powered by two new 1.5V AA batteries during test. For maximizing emissions below 30 MHz, the EUT was rotated through 360°, the centre of the loop antenna was placed 1 meter above the ground, and the antenna polarization was changed. For maximizing emission at and above 30 MHz, 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 report in Exhibit 3.0. The unit was operated standalone and placed in the centre 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 mounted to a plastic stand if necessary and placed on the polystyrene turntable, which enabled the Senior Engineer to maximize emissions through its placement in the three orthogonal axes. 2.2 EUT Exercising Software There was no special software to exercise the device. Once the unit is powered up, it can transmit the RF signal continuously. 2.3 Special Accessories There are no special accessories necessary for compliance of this product. 2.4 Equipment Modification Any modifications installed previous to testing by GAINMAX LIMITED will be incorporated in each production model sold/leased in the United States. No modifications were installed by Intertek Testing Services Shenzhen Ltd. Longhua Branch. 2.5 Measurement Uncertainty When determining of the test conclusion, the Measurement Uncertainty of test has been considered. 2.6 Support Equipment List and Description N/A. Version: 01 November 2017 Page: 6 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 3.0 Emission Results Data is included of the 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. 3.1 Field Strength Calculation The field strength is calculated by adding the Antenna Factor and Cable Factor, and subtracting the Amplifier Gain (if any), Average Factor (optional) from the measured reading. The basic equation with a sample calculation is as follows: FS = RA + AF + CF - AG - 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 AV = Average Factor in dB In the following table(s), the reading shown on the data table reflects the preamplifier gain. An example for the calculations in the following table is as follows: FS = RR + LF where FS = Field Strength in dBµV/m RR = RA - AG - AV in dBµV LF = CF + AF in dB Assume a receiver reading of 52.0 dBµV is obtained. The antenna factor of 7.4 dB and cable factor of 1.6 dB are added. The amplifier gain of 29 dB and average factor of 5 dB are subtracted, giving a field strength of 27 dBµV/m. This value in dBµV/m was converted to its corresponding level in µV/m. RA = 52.0 dBµV/m AF = 7.4 dB RR = 18.0 dBµV CF = 1.6 dB LF = 9.0 dB AG = 29.0 dB AV = 5.0 dB FS = RR + LF FS = 18 + 9 = 27 dBµV/m Level in µV/m = Common Antilogarithm [(27 dBµV/m)/20] = 22.4 µV/m Version: 01 November 2017 Page: 7 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 3.2 Radiated Emission Configuration Photograph Worst Case Radiated Emission at 81.435 MHz For electronic filing, the worst case radiated emission configuration photographs are saved with filename: radiated photos.pdf. 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. Judgment: Passed by 4.5dB TEST PERSONNEL: Sign on file Terry Tang, Senior Engineer Typed/Printed Name Apr 01, 2019 Date Version: 01 November 2017 Page: 8 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 Applicant: GAINMAX LIMITED Date of Test: Apr 01, 2019 Model: 731596 Worst Case Operating Mode: Transmitting Table 1 Radiated Emissions Polarization Frequency Reading Pre- Antenna Average Net Limit Margin (MHz) (dBµV) Amp Factor Factor at 3m at 3m (dB) Gain (dB) (-dB) (dBµV/m) (dBµV/m) (dB) Vertical 27.145 30.5 0.0 18.4 4.6 44.3 80.0 -35.7 Vertical 54.290 46.5 20.0 6.9 - 33.4 40.0 -6.6 Vertical 81.435 49.2 20.0 6.3 - 35.5 40.0 -4.5 Vertical 108.580 42.4 20.0 8.1 - 30.5 43.5 -13.0 Vertical 135.725 34.5 20.0 6.9 - 21.4 43.5 -22.1 Vertical 162.870 37.3 20.0 7.8 - 25.1 43.5 -18.4 Vertical 190.015 29.2 20.0 13.9 - 23.1 43.5 -20.4 NOTES: 1. Peak Detector Data unless otherwise stated. 2. All measurements were made at 3 meters. Harmonic emissions not detected at the 3-meter distances 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 sign in the column shows value below limit. 4. Loop antenna is used for the emissions below 30 MHz. 5. Emission is at least 34.47dB below the carrier level at the band edge (26.96MHz and 27.28 MHz). Version: 01 November 2017 Page: 9 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 4.0 Equipment Photographs For electronic filing, the photographs are saved with filename: external photos.pdf and internal photos.pdf. 5.0 Product Labelling For electronics filing, the FCC ID label artwork and the label location are saved with filename: label.pdf. 6.0 Technical Specifications For electronic filing, the block diagram and schematic of the tested EUT are saved with filename: block.pdf and circuit.pdf respectively. 7.0 Instruction Manual For electronic filing, a preliminary copy of the Instruction Manual is saved with filename: manual.pdf. This manual will be provided to the end-user with each unit sold/leased in the United States. 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. Version: 01 November 2017 Page: 10 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 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 34.47dB below the carrier level at the band edge (26.96MHz and 27.28 MHz). It meets the requirement of Section 15.227(b). Pursuant to FCC part 15 Section 15.215(c), the 20dB bandwidth of the emission was contained within the frequency band designated (mentioned as above) which the EUT operated. The effects, if any, from frequency sweeping, frequency hopping, other modulation techniques and frequency stability over excepted variations in temperature and supply voltage were considered. Version: 01 November 2017 Page: 11 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 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 725µs 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. 8.3 Calculation of Average Factor 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 = 27.971ms Effective period of the cycle =725μs x10 + 2.319ms x4 = 16.526ms DC=16.526ms / 27.971ms =0.5908 or 59.08% Therefore, the averaging factor is found by 20 log10 (0.5908) =-4.6dB Version: 01 November 2017 Page: 12 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 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 C63.10 - 2013. The transmitting equipment under test (EUT) is placed on a polystyrene turntable which is four feet in diameter and approximately 0.8 meter in height above the ground plane. 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 EUT is adjusted through all three orthogonal axes to obtain maximum emission levels. 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. Version: 01 November 2017 Page: 13 of 14 FCC ID_b-227

Test Report Intertek Report No.: SZHH01338129-001 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 C63.10 - 2013. 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). Transmitter measurements are normally conducted at a measurement distance of three meters. However, to assure low enough noise floor in the restricted bands, 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. 9.0 Equipment List Equipment Model Equipment Manufacturer Serial No. Cal. Date Due Date No. No. EMI SZ185-01 R&S ESCI 100547 4-Jan-19 4-Jan-20 Receiver Anechoic RFD-F/A- SZ188-01 ETS 4102 15-Dec-18 15-Dec-20 Chamber 100 SZ062-02 RF Cable RADIALL RG 213U -- 2-Jan-19 2-Jul-19 0.04- SZ062-05 RF Cable RADIALL -- 28-Feb-19 28-Aug-19 26.5GHz Active Loop SZ061-06 Electro-Metrics EM-6876 217 11-May-18 11-May-19 Antenna BiConiLog SZ061-12 ETS 3142E 00166158 14-Sep-18 14-Sep-19 Antenna Version: 01 November 2017 Page: 14 of 14 FCC ID_b-227


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Document Modified: 2019-04-18 14:24:21
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