II670055FM Wireless Microphone

FCC ID: II670055 PHOTOGRAPH OF THE PRODUCT FRONT VIEW OF THE PRODUCT REAR VIEW OF THE PRODUCT

FCC ID: II670055 LABEL LOCATION BOTTOM VIEW OF THE DEVICE WITH FCC ID LABEL

FCC ID: II670055 PHOTOGRAPH OF THE PRODUCT INNER CIRCUIT TOP VIEW INNER CIRCUIT BOTTOM VIEW

FCC ID: II670055 Circuit Description The 100.17MHz crystal oscillator drives the base of Q4 the final/buffer amplifier. The modulation provided by Mic. The output of Q4 has the matching network consisting of L3 and C5 that limit the harmonic content and effect the proper coupling of the antenna to the output stage. Antenna, Ground and Power Source There is no external ground connection. The ground is only that of the printed circuit board. Electric current is supplied by a 6Volt (“C” size battery x 4) primary battery

Date: 2000-06-15 TEST REPORT Page 1 of 18 No.: WM100538 FCC PART 15 SUBPART C CERTIFICATION REPORT FOR LOW POWER TRANSMITTER TEST REPORT No.:HM102299 Equipment Under Test [EUT]:Party DJ Model Number:70055 Applicant:Supersonics Elect. Co. FCC ID :II670055 Date: 2000-06-15 TEST REPORT Page 2 of 18 No.: WM100538 CONTENT: Cover Page 1 of 18 Content Page 2-3 of 18 Conclusion Page 4 of 18 1.0General Details 1.1Test Laboratory Page 5 of 18 1.2Applicant Details Page 5 of 18 Applicant HKSTC Code Number for Applicant Manufacturer 1.3Equipment Under Test [EUT] Page 6 of 18 Description of EUT operation 1.4Date of Order Page 6 of 18 1.5Submitted Sample Page 6 of 18 1.6Test Duration Page 6 of 18 1.7Country of Origin Page 6 of 18 1.8 Additional Information of EUT Page 7 of 18 2.0Technical Details 2.1Investigations Requested Page 8 of 18 2.2Test Standards and Results Summary Page 8 of 18 3.0Test Results 3.1Emission Page 9-13 of 18 3.2Bandwidth Measurement Page 14-15 of 18 Date: 2000-06-15 TEST REPORT Page 3 of 18 No.: WM100538 Appendix A List of Measurement Equipment Page 16 of 18 Appendix B Photographs Page 17-18 of 18 Date: 2000-06-15 TEST REPORT Page 4 of 18 No.: WM100538 CONCLUSION The submitted product was deemed to have COMPLIED with the requirements of Federal Communications Commission [FCC] Rules and Regulations Part 15. The tests were performed in accordance with the standards described above and on Section 2.2 in this Test Report. Testing EngineerVerify byPatrick Wong for Managing Director Date: 2000-06-15 TEST REPORT Page 5 of 18 No.: WM100538 1.0General Details 1.1Test Laboratory The Hong Kong Standards and Testing Centre Ltd. EMC Laboratory 10 Dai Wang Street, Taipo Industrial Estate New Territories, Hong Kong Telephone:852 2666 1888 Fax:852 2664 4353 1.2Applicant Details Applicant Supersonics Elect. Co. Block D, 6 th Floor, Gee Chang Industrial Building, 108, Lok Shan Road, Tokwawan, Kowloon, Hong Kong. Telephone:852 2765 7263 Fax:852 2764 3419 HKSTC Code Number for ApplicantSUE001 Manufacturer Shenzhen Jin Hing Supersonics Electric Co., Ltd. Block 115, Shenbu Sha Tsui Ind. Area, Shenzhen, China Telephone:86 755 337203 Fax:86 755 337204 Date: 2000-06-15 TEST REPORT Page 6 of 18 No.: WM100538 1.3Equipment Under Test [EUT] Description of Sample Product:Party DJ Manufacturer:Shenzhen Jin Hing Supersonics Electric Co., Ltd. Brand Name:N/A Model Number:70055 Input Voltage:6Vd.c (“C” size battery x 4) 1.3.1Description of EUT Operation The Equipment Under Test (EUT) is an Supersonics Elect. Co., 100.17MHz Wireless FM Microphone Transmitter. The EUT continues to transmit while switch on. It is voice transmission, Modulation by Mic. and tape is frequency modulation. 1.4Date of Order 2001-05-15 1.5Submitted Sample(s): 3 Samples per model 1.6Test Duration 2000-06-13 1.7Country of Origin China Date: 2000-06-15 TEST REPORT Page 7 of 18 No.: WM100538 1.8Additional Information of EUT SubmittedNot Available User Manual Part List Circuit Diagram Printed Circuit Board [PCB] Layout Rating Label Block diagram FCC ID Label Date: 2000-06-15 TEST REPORT Page 8 of 18 No.: WM100538 2.0Technical Details 2.1Investigations Requested Perform ElectroMagnetic Interference measurement in accordance with FCC 47CFR [Codes of Federal Regulations] Part 15 and ANSI C63.4:1992 for FCC Certification. 2.2Test Standards and Results Summary Tables EMISSION Results Summary Test ConditionTest RequirementTest MethodClass /Test Result SeverityPassFailedN/A Field Strength of Fundamental Emissions & Spurious Emissions FCC 47CFR 15.239ANSI C63.4:1992N/A Radiated Emissions, 30MHz to 1GHz FCC 47CFR 15.209ANSI C63.4:1992Class B Conducted Emissions on AC, 0.45MHz to 30MHz FCC 47CFR 15.207ANSI C63.4:1992Class B Note: N/A - Not Applicable Date: 2000-06-15 TEST REPORT Page 9 of 18 No.: WM100538 3.0Test Results 3.1Emission 3.1.1Radiated Emissions Test Requirement:FCC 47CFR 15.239 & 15.209 Test Method:ANSI C63.4:1992 Test Date:2000-06-13 Mode of Operation:On mode Test Method: The sample was placed 0.8m above the ground plane on the OATS *. Measurements in both horizontal and vertical polarities were performed. During the test, each emission was maximized by: having the EUT continuously working, investigate all operating modes, rotated about all 3 axis (X, Y & Z) to obtain worst position, manipulating interconnecting cables, rotating turntable, varying antenna height from 1m to 4m in both horizontal and vertical polarizations. The emissions worst-case are shown in Test Results of the following pages. *:OATS [Open Area Test Site] located at HKSTC with a metal ground plane on filed with the FCC pursuant to section 2.948 of the FCC rules, with Registration Number: 90657. Test Setup: EUT distance = 3m Pre -Amplifier Receiver Turn Table Computer Ground plane Date: 2000-06-15 TEST REPORT Page 10 of 18 No.: WM100538 Limits for Field Strength of Fundamental Emissions [FCC 47CFR 15.239]: Frequency Range of Fundamental Peak LimitsAverage Limits [MHz][μV/m][μV/m] 88-1082,500250 Results: Field Strength of Fundamental Emissions Peak Value FrequencyLevel @3mCorrection Factor Field Strength Field Strength Limit ** @3m Antenna Polarity MHzdBμVdB/mdBμV/mμV/mμV/m 100.1728.715.444.1160.32,500.0Horizontal Results: Field Strength of Fundamental Emissions Average Value * FrequencyLevel @3m Correction Factor Field Strength Field Strength Limit ** @3m Antenna Polarity MHzdBμVdB/mdBμV/mμV/mμV/m 100.1728.415.443.8154.8250.0Horizontal Remarks: Correction Factor included Antenna Factor and Cable Attenuation. Calculated measurement uncertainty=30MHz to 300MHz±3.7dB 300MHz to 1GHz+3.0dB / -2.7dB According to FCC 47CFR15.35, the limit on the radio frequency emissions as measured using instrumentation with a peak detector function, corresponding to 20dB above the maximum permitted average limit for the frequency being investigated unless a different peak emission limit is otherwise specified in the rules. For effective averaging, the bandwidth of the video filter must be smaller…

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FCC ID: II670055 Limits for 26 dB Bandwidth of Fundamental Emission: Frequency Range 26dB Bandwidth FCC Limits * [MHz] [KHz] [KHz] 100.17 48.5 200 Results: The following figure is the measured bandwidth of Fundamental Emission. 26dB Bandwidth of Fundamental Emission

Marianne Bosley From:Marianne Bosley Sent:Friday, July 20, 2001 1:41 PM To:'[email protected]' Cc:'[email protected]' Subject:Supersonics FCC ID:II670055 Metrak #11110 Alice, I didn't know if you received my previous email(wrong format). Here it is again. Let me know if you need any assistance in resolving these issues so that we may grant this project. Marianne Hi Alice, Greg Czumak has completed the technical review for this project. The requested items are below: 1. Was a "loud voice" used as the input to generate the bandwidth plot, >such that the output is worst case (i.e., as wide as possible)? Were the >pre-set inputs ("laughing, cheering, and drum sounds", as listed in the >manual) used to measure the output bandwidth? Was the audio tape input, >with vilome set at maximum, tested? If any of these were not, please do >so and submit new data. > >2. It is a de facto FCC requirement for devices authorized under Section >15.239 that they have some form of limiting, or clipping, on the input audio >signal, so that the maximum deviation of the fundamental emission does not >exceed the 200 kHz bandwidth limit listed in Section 15.239(a) if someone >yells into the microphone. Typically, clipping diodes are used. Any >devices that do not have an audio input limiter are sample tested, and >usually fail. Does the EUT have any such limiting? From the schematics, it >does not appear to. If it does, then please describe this limiting in >detail. If you need any assistance, please let me know. Marianne Marianne T. Bosley EMC Admi nistrator 410-354-3300, ext. 412

FCC ID: II670055 TEST SET UP PHOTOGRAPH OF THE PRODUCT MEASUREMENT OF RADIATED EMISSION TEST SET UP