M8Q3250027Remote Control Toy Transmitter

FCC ID: M8Q3250027 LOCATION FCC ID:M8Q3250027 MADE IN CHINA This device complies with part 15 of FCC Rules. Operation is subject to the following two condition: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

FCC ID: M8Q3250027 PHOTOGRAPH OF THE PRODUCT INNER CIRCUIT TOP VIEW INNER CIRCUIT BOTTOM VIEW

FCC ID: M8Q3250027 Circuit Description The 27.145MHz crystal oscillator drives the base of Q2 the final/buffer amplifier. The modulation provided by IC (NK8000C). The output of Q2 has the matching network consisting of L3 and C7 that limit the harmonic content and effect the proper coupling of the antenna to the output stage. Antenna, Ground and Power Source The antenna consists of a 45 metal antenna. There is no external ground connection. The ground is only that of the printed circuit board. Electric current is supplied by a 9Volt (“6F22” size battery x 1) primary storage cell.

Date: 2000-12-12 TEST REPORT Page 1 of 8 No.: HM103539 Law Man KitSteven TsangPatrick Wong Testing EngineerVerify byPatrick Wong for Managing Director APPLICANT: (CODE: NGK003) NGAI KEUNG METAL & PLASTIC MANUFACTORY LTD. Room 614-7 Tower A, New Mandarin Plaza, 14 Science Museum Road, Tsim Sha Tsui East, Kowloon, Hong Kong. DATE OF SAMPLE(S) RECEIVED: 2000-10-09 SUBMITTED SAMPLE(S): 7 samples per model DATE OF TESTING: 2000-12-12 DESCRIPTION OF SAMPLE(S): A sample of product said to be: Product:RADIO CONTROL BOAT Manufacturer:NGAI KEUNG METAL & PLASTIC MANUFACTORY LTD. Model Number:32500 Brand Name:NGAI KEUNG Rating: 9V d.c. ("6F22" size battery × 1) Origin:CHINA INVESTIGATIONS REQUESTED: Measurement to the relevant clauses of F.C.C. Rules and Regulations Part 15 Subpart C - Intentional Radiator. RESULT/ REMARK:Please see attached sheet(s). CONCLUSION: From the measurement data obtained, the tested sample was considered to have COMPLIED with the clause 15.227 of Federal Communications Commission Rules and Regulations Part 15. TEST EQUIPMENT AUDIT: Please see Appendix A Date: 2000-12-12 TEST REPORT Page 2 of 8 No.: HM103539 T E S T S U M M A R Y *** INTENTIONAL RADIATOR *** (1) Measurement of Emission of RF energy on the carrier frequency..........Satisfactory (2) Measurement of the out-of band emissions including harmonics...........Satisfactory (3) Measurement of Emission Within Band Edges.......................................Satisfactory (4) Measurement of Line-Conducted Voltage onto AC Power Line............Not applicable T E S T D A T A Please refer to the attached result sheets. Date: 2000-12-12 TEST REPORT Page 3 of 8 No.: HM103539 *** INTENTIONAL RADIATOR *** (1) Measurement of Radiated Interference TEST REFERENCE:FCC Rules Part 15 Subpart Section 15.227(26.96-27.28MHz) TEST CONDITION:Normal TEST DATE:2000-12-11 Emission of RF energy on the carrier frequency -- 27.145 MHz (PEAK VALUE) ================================================================== EmissionMeterPolarizationAntennaField Strength FCC Limit FrequencyReadingFactor(at 3m) MHzdB( μV)H-VdBdB(μV/m)μV/mμV/m 27.158.8V+18.577.37328.2100000.0 ================================================================== Emission of RF energy on the carrier frequency -- 27.145 MHz (AVERAGE VALUE) ================================================================== EmissionMeterPolarizationAntennaField Strength FCC Limit FrequencyReadingFactor(at 3m) MHzdB( μV)H-VdBdB(μV/m)μV/mμV/m 27.148.7V+18.567.22290.910000.0 ================================================================== ... to be continued Date: 2000-12-12 TEST REPORT Page 4 of 8 No.: HM103539 *** INTENTIONAL RADIATOR *** (1) Measurement of Radiated Interference . . Continued .. TEST REFERENCE:FCC Rules Part 15 Subpart Section 15.227(26.96-27.28MHz) TEST CONDITION:Normal TEST DATE:2000-12-11 The out-of-band emissions, including harmonics (25-1000 MHz) (CISPR VALUE) ================================================================== EmissionMeterPolarizationAntennaField Strength FCC Limit FrequencyReadingFactor(at 3m) MHzdB( μV)H-VdBdB(μV/m)μV/mμV/m ###54.3<1.0+12.9<13.9<5.0100.0 81.4<1.0+8.9<9.9<3.1100.0 108.6<1.0+12.2<13.2<4.6150.0 135.715.2V+10.826.020.0150.0 162.919.6V+9.529.128.5150.0 190.018.7V+11.129.830.9150.0 217.2<1.0+12.2<13.2<4.6200.0 244.3<1.0+13.5<14.5<5.3200.0 271.5<1.0+16.0<17.0<7.1200.0 298.6<1.0+16.5<17.5<7.5200.0 325.7<1.0+16.6<17.6<7.6200.0 352.9<1.0+16.7<17.7<7.7200.0 380.0<1.0+17.4<18.4<8.3200.0 407.2<1.0+18.2<19.2<9.1200.0 434.3<1.0+19.5<20.5<10.6200.0 461.5<1.0+20.1<21.1<11.4200.0 488.6<1.0+20.3<21.3<11.6200.0 515.8<1.0+20.9<21.9<12.4200.0 542.9<1.0+22.1<23.1<14.3200.0 570.0<1.0+22.8<23.8<15.5200.0 597.2<1.0+23.3<24.3<16.4200.0 624.3<1.0+23.4<24.4<16.6200.0 ... to be continued Date: 2000-12-12 TEST REPORT Page 5 of 8 No.: HM103539 *** INTENTIONAL RADIATOR *** (1) Measurement of Radiated Interference . . Continued .. TEST REFERENCE:FCC Rules Part 15 Subpart Section 15.227(26.96-27.28MHz) TEST CONDITION:Normal TEST DATE:2000-12-11 The out-of-band emissions, including harmonics (25-1000 MHz) (CISPR VALUE) ================================================================== EmissionMeterPolarizationAntennaField Strength FCC Limit FrequencyReadingFactor(at 3m) MHzdB(μV)H-VdBdB(μV/m)μV/mμV/m ###651.5<1.0+23.6<24.6<17.0200.0 678.6<1.0+24.9<25.9<19.7200.0 705.8<1.0+25.1<26.1<20.2200.0 732.9<1.0+25.4<26.4<20.9200.0 760.1<1.0+26.4<27.4<23.4200.0 787.2<1.0+26.8<27.8<24.5200.0 814.4<1.0+26.7<27.7<24.3200.0 841.5<1.0+26.1<27.1<22.6200.0 868.6<1.0+26.8<27.8<24.5200.0 895.8<1.0+27.1<28.1<25.4200.0 922.9<1.0+27.5<28.5<26.6200.0 950.1<1.0+28.1<29.1<28.5200.0 977.2<1.0+28.2<29.2<28.8500.0 ================================================================== ====================SUMMARY=================== All data is within limits ============================================= Broad-band Antennas were used both polarizations of emissions were measured. polarizations at highest reading indicated as: H -- HorizontalV -- Vertical ============================================= Date: 2000-12-12 TEST REPORT Page 6 of 8 No.: HM103539 *** INTENTIONAL RADIATOR *** (2) Measurement of Emissions Within Band Edges. TEST REFERENCE: FCC Rules Part 15 section 15.227(26.96-27.28MHz) TEST CONDITION: Normal TEST DATE : 2000-12-11 RESULTS AND NOTES L: FCC Lower Band Edge ..........................................................................-> 26.960MHz H: FCC Higher Band Edge .........................................................................-> 27.280MHz C: Unmodulated carrier at frequency .........................................................-> 27.145MHz D: No. of dB from unmodulated carrier .....................................................-> 51.00dB SPECTRUM ANALYZER SETTINGS Resolution bandwidth: 19.6KHz Frequency span: 10.0KHz/div No. of dB/div: 10.0dB/div FCC Limit Minimum No. of dB from unmodulated carrier required : 26.0dB ================SUMMARY================ All data is within …

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Chris Harvey From:Alice Wong [[email protected]] Sent:Tuesday, April 10, 2001 6:39 AM To:[email protected] Cc:EED - Choy, Kitty Subject:MET #10739 FCC ID: M8Q3250027 "Ngai Keung Metal & Plastic Manufactory Ltd." Dear Chris, 1) Please see attached file "bandwidth" for spectral plots. 2) Duty cycle correction during 100 msec: Each function key sends a different series of characters, but each packet period (17.125 msec) never exceeds a series of 4 long (1.375 msec) and 10 short (375usec) pulses. Transmit duty cycle would be considered (4 x 1.375 msec)+(10 x 375 usec) per 17.125 msec = 54%. Duty cycle correction = 20 log (0.54) = -5.3dB Figure A to C show the characteristics of the pulse for one of these functions. (See attached file "pulse") Thanks. Best Regards Alice > > Ngai Keung FCC ID: M8Q3250027 MET#10739 > > > > RC Toy Transmitter (DXX) ... 27.145 MHz ... Section 15.227 > > > > 1. Please provide spectral plots wide enough to show both the upper and > > lower bandedges (26.96 MHz and 27.28 MHz) that > > demonstrate bandedge compliance. The FCC prefers spectral plots rather > > than tabular data indicating emission levels at the > > bandedges. > > > > 2. Radiated test data indicates a 10 dB difference between the measured > > peak and average field strength levels. What type of > > modulation is employed? If pulsed, measurements with an average > > detector are not permitted. Instead, the peak level is > > measured, and then the average level is mathematically calculated, based > > on the duty cycle. If this is the case, please provide > > time domain plots so that the duty cycle correction factor may be > > calculated. If the emission is not pulsed, please explain why > > there is such a large peak to average ratio, since the plots indicate > > that the emission is narrower than the measurement bandwidth > > of 100 kHz specified by the test procedure (ANSI C63.4). > >

FCC ID: M8Q3250027 TEST SET UP PHOTOGRAPH OF THE PRODUCT