M8Q8121649Remote Control Toy Transmitter

Marianne Bosley To:Alice Wong Subject:RE: 3 New Application for apply FCC Certificate I have completed the administrative review of the 3 new Ngai Keung applications. The findings are below: 1. FCC ID: M8Q8121627 - a. operational/circuit description not included. b. Manual was not included (to include users info to be included in the manual - 15.21 statement and 15.105 statement if applicable. 2. FCC ID: M8Q8121649 - a. operational/circuit description not included. b. Manual was not included (to include users info to be included in the manual - 15.21 statement and 15.105 statement if applicable. 3. FCC ID: M8Q3250027 - a. operational/circuit description to included. b. Manual was not included (to include users info to be included in the manual - 15.21 and 15.105 if applcable). c. Test setup photos were not included. The technical review will happen next week when Greg and Chris are back. In the meantime, please get the administrative info to me. Also, please review any of the past technical issues with the other submissions to ensure that any of those problems are not present here. Thank you, and I'll be looking for this information. Have a great day. Marianne -----Origina l Message----- From:Alice Wong [SMTP:[email protected]] Sent:Saturday, March 17, 2001 2:43 AM To:[email protected] Cc:EED - Choy, Kitty; mbosle y@metlabs .com; lk nig ht@metlabs .com Subject:3 New Application for apply FCC Certificate Dear Chris, 1) I have 3 new application for apply FCC certificate FCC ID: M8Q8121627, M8Q8121649 and M8Q3250027 (Please see attached file for new application) (but that 3 application is no manual attached, I will remind the client sent it to me ASAP). 2) Would you tell me about application "FCC ID: G6D337A-R01, G6D3377A-R01 and LU9247845" there granted or not? 3) Do you receive application "FCC ID: N8F12706VC" the setup photo and circuit description? 4) About the FCC ID: GYE60570-R1, I had revised the document and re-sent to you. (Please see attached file "cover", "cir-des", label" and "report" for revised document. Thank!!) 5) Would you tell me which application still not grant, and what problem have? Thanks and have a nice day! Best Regards Alice << File: Po.pdf >> << File: M8Q8121627.zip >> << File: M8Q8121649.zip >> << File: M8Q3250027.zip >> << File: cover.pdf >> << File: cir-des.pdf >> << File: report.pdf >> << File: label.PDF >>

FCC ID: M8Q8121649 PHOTOGRAPH OF THE PRODUCT FRONT VIEW OF THE PRODUCT REAR VIEW OF THE PRODUCT

FCC ID:M8Q8121649 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: M8Q8121649 LOCATION FCC ID:M8Q8121649 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: M8Q8121649 PHOTOGRAPH OF THE PRODUCT INNER CIRCUIT TOP VIEW INNER CIRCUIT BOTTOM VIEW

FCC ID: M8Q8121649 Circuit Description The 49.86MHz 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 45cm long 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: 2000-11-05 TEST REPORT Page 1 of 8 No.: HM103419 Law Man KitSteven TsangPatrick Wong Testing EngineerVerify byPatrick Wong for Managing Director APPLICANT: (CODE: NGK003) NGAI KEUNG METAL & PLASTIC MANUFACTORY LTD. Rm. 614-7 Tower A, New Mandarin Plaza, 14 Science Museum Rd., T.S.T East, Kln, H.K. DATE OF SAMPLES RECEIVED:2000-10-09 SUBMITTED SAMPLE(S): 4 samples per model DATE OF TESTING: 2000-11-04 DESCRIPTION OF SAMPLE(S): A sample of product said to be: Product:1:12 R/C Toys Transmitter Manufacturer:Ngai Keung Metal & Plastic Manufactory Ltd. Model Number:81216 Brand Name:Ngai Keung Rating: 9.0Vd.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 15.235 of Federal Communications Commission Rules and Regulations Part 15. TEST EQUIPMENT AUDIT: Please see Appendix A Date: 2000-11-05 TEST REPORT Page 2 of 8 No.: HM103419 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: 2000-11-05 TEST REPORT Page 3 of 8 No.: HM103419 *** INTENTIONAL RADIATOR *** (1) Measurement of Radiated Interference TEST REFERENCE:FCC Rules Part 15 Section 15.235(49.82-49.90 MHz) TEST CONDITION:Normal TEST DATE:2000-11-04 Emission of RF energy on the carrier frequency -- 49.86 MHz (PEAK VALUE) ================================================================== EmissionMeterPolarizationAntennaField Strength FCC Limit FrequencyReadingFactor(at 3m) MHzdB( μV)H-VdBdB(μV/m)μV/mμV/m 49.969.8V+15.084.817378.0100.0100000.0 ================================================================== Emission of RF energy on the carrier frequency -- 49.86 MHz (AVERAGE VALUE) ================================================================== EmissionMeterPolarizationAntennaField Strength FCC Limit FrequencyReadingFactor(at 3m) MHzdB(μV)H-VdBdB(μV/m)μV/mμV/m 49.959.1V+15.074.15069.980.010000.0 ================================================================== ... to be continued Date: 2000-11-05 TEST REPORT Page 4 of 8 No.: HM103419 *** INTENTIONAL RADIATOR *** (1) Measurement of Radiated Interference . . Continued TEST REFERENCE:FCC Rules Part 15 Section 15.235(49.82-49.90 MHz) TEST CONDITION:Normal TEST DATE:2000-11-04 The out-of-band emissions, including harmonics (25-1000 MHz) (CISPR VALUE) ========================================================================= EmissionPolarizationMeterAntennaField Strength (at 3m)FCC FrequencyreadingfactorLimit (at 3m)@ MHzH-VdBdB( μ V) μ V/m μ V/m ##99.7H20.4+12.232.642.744150 149.6H22.6+9.832.441.744150 199.4H29.1+11.540.6107.244150 249.3H18.3+15.934.251.346200 299.2V20.4+17.037.474.146200 349.0<1.0+17.2<18.2<8.146200 398.9<1.0+18.8<19.8<9.846200 448.7<1.0+19.7<20.7<10.846200 498.6<1.0+20.6<21.6<12.046200 548.5<1.0+22.2<23.2<14.546200 598.3<1.0+23.4<24.4<16.646200 648.2<1.0+23.5<24.5<16.846200 698.0<1.0+25.0<26.0<20.046200 747.9<1.0+26.3<27.3<23.246200 797.8<1.0+27.2<28.2<25.746200 847.6<1.0+26.6<27.6<24.046200 897.5<1.0+27.1<28.1<25.446200 947.3<1.0+28.0<29.0<28.246200 997.2<1.0+28.5<29.5<29.954500 ================================================================== =================SUMMARY================ All data is within limits ======================================= Broad-band Antennas were used and both polarizations of emissions were measured. polarizations at highest reading indicated as: H -- HorizontalV -- Vertical ======================================= Date: 2000-11-05 TEST REPORT Page 5 of 8 No.: HM103419 *** INTENTIONAL RADIATOR *** (2) Measurement of Emissions Within Band Edges TEST REFERENCE:FCC Rules Part 15 Section 15.235(49.82-49.90 MHz) TEST CONDITION:Normal TEST DATE:2000-11-04 RESULTS AND NOTES L: FCC Lower Band Edge..............................................................................-> 49.820MHz H: FCC Higher Band Edge.............................................................................-> 49.900MHz C: Unmodulated carrier at frequency..............................................................-> 49.86MHz D: No. of dB from unmodulated carrier..........................................................-> 47.90dB SPECTRUM ANALYZER SETTINGS Resolution bandwidth : 17.7KHz 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 limits =========================================================== Date: 2000-11-05 TEST REPORT Page 6 of 8 No.: HM103419 NOTES FOR THE RADIATION MEASUREMENT (1) Test site facility: Open field test site located at Taipo (Hong Kong) with a metal ground plane on filed with the FCC pursuant to section 2.948 of the FCC rules. (2) Distance between the EUT and measuring antenna: 3 meters. (3) Measuring instrumentations: CISPR Quasi-peak type field strength meter (25 MHz - 1000 MHz). 6 dB bandwidth set at 120KHz. Also, peak level of the fundamental emissions was measured in order to determine compliance with the 20dB peak to average limit specified in Section 15.35(b) of the FCC new Rules. (4) Measuring antenna: Broad band antenna for the frequency range 25-1000 MHz, connected with 10 meters coaxial cable. Cable loss of the coaxial cable included in the Antenna Factor for measurement data. The antenna are capable of measuring both horizontal and vertical polarizations. (5) Frequency range scanned: The frequency…

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Chris Harvey From:Alice Wong [[email protected]] Sent:Wednesday, April 11, 2001 4:09 AM To:[email protected] Cc:EED - Choy, Kitty Subject:MET# 10738 FCC ID: M8Q8121649 "Ngai Keung Metal & Plastic Manufactory Ltd." Dear Chris, MET# 10738 FCC ID: M8Q8121649 Ngai Keung Metal & Plastic Manufactory Ltd. 1) Duty cycle correction during 100 msec: Each function key sends a different series of characters, but each packet period (50.2msec) never exceeds a series of 4 long (1msec) and 40 short (231usec). Transmit duty cycle would be considered (4 x 1msec) + (40 x 231usec) per 50.2msec = 26.4%. Duty cycle correction = 20 log (0.263) = -11.5dB Figure A to C show the characteristics of the pulse train for one of these functions. (Please see attached file "pulse") Thanks. Best Regards Alice > > > > Ngai Keung FCC ID:M8Q8121649 MET#10738 > > > > RC Toy Transmitter (DXX) ... 49.86 MHz ... Section 15.235 > > > > 1. 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). > > pulse.pdf

FCC ID: M8Q8121649 TEST SET UP PHOTOGRAPH OF THE PRODUCT