OY268138FM Wireless Microphone

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FCC ID: OY268138 PHOTOGRAPH OF THE PRODUCT FRONT VIEW OF THE PRODUCT REAR VIEW OF THE PRODUCT

OY268138 OY268138

OY268138

FCC ID: OY268138 PHOTOGRAPH OF THE PRODUCT INNER CIRCUIT TOP VIEW INNER CIRCUIT BOTTOM VIEW

FCC ID: OY268138 Circuit Description The 90.489-104.39MHz oscillator drives the base of Q3 the final/buffer amplifier. The modulation provided by Mic. The output of Q3 has the matching network consisting of R6 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 25cm long signal wire. There is no external ground connection. The ground is only that of the printed circuit board. Electric current is supplied by a 3Volt (“AA” size battery x 2) primary battery

Date: 2000-06-18 TEST REPORT Page 1 of 21 No.: HM104846 FCC PART 15 SUBPART C CERTIFICATION REPORT FOR LOW POWER TRANSMITTER TEST REPORT No.: HM104846 Equipment Under Test [EUT]: FM Wireless Microphone Model Number: 68138 Applicant: Superior Focus International (Asia) Ltd. FCC ID : OY268138 Date: 2000-06-18 TEST REPORT Page 2 of 21 No.: HM104846 CONTENT: Cover Page 1 of 21 Content Page 2-3 of 21 Conclusion Page 4 of 21 1.0 General Details 1.1 Test Laboratory Page 5 of 21 1.2 Applicant Details Page 5 of 21 Applicant HKSTC Code Number for Applicant Manufacturer 1.3 Equipment Under Test [EUT] Page 6 of 21 Description of EUT operation 1.4 Date of Order Page 6 of 21 1.5 Submitted Sample Page 6 of 21 1.6 Test Duration Page 6 of 21 1.7 Country of Origin Page 6 of 21 1.8 Additional Information of EUT Page 7 of 21 2.0 Technical Details 2.1 Investigations Requested Page 8 of 21 2.2 Test Standards and Results Summary Page 8 of 21 3.0 Test Results 3.1 Emission Page 9-14 of 21 3.2 Bandwidth Measurement Page 15-17 of 21 Date: 2000-06-18 TEST REPORT Page 3 of 21 No.: HM104846 Appendix A List of Measurement Equipment Page 18 of 21 Appendix B Modification Method Page 19 of 21 Appendix C Photographs Page 20-21 of 21 Date: 2000-06-18 TEST REPORT Page 4 of 21 No.: HM104846 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. Law Man Kit Steven Tsang Patrick Wong Testing Engineer Verify by Patrick Wong for Managing Director Date: 2000-06-18 TEST REPORT Page 5 of 21 No.: HM104846 1.0 General Details 1.1 Test 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 1.2 Applicant Details Applicant Superior Focus International (Asia) Ltd. Unit 1011, Houston Centre, 63 Mody Road, Tsimshatsui East, Kowloon, Hong Kong. Telephone: 852 25628662 Fax: 852 25612118 HKSTC Code Number for Applicant SUF007 Manufacturer Superior Focus International (Asia) Ltd. Unit 1011, Houston Centre, 63 Mody Road, Tsimshatsui East, Kowloon, Hong Kong. Telephone: 852 25628662 Fax: 852 25612118 Date: 2000-06-18 TEST REPORT Page 6 of 21 No.: HM104846 1.3 Equipment Under Test [EUT] Description of Sample Product: FM Wireless Microphone Manufacturer: Superior Focus International (Asia) Ltd. Brand Name: Kidz FOCUS Model Number: 68138 Input Voltage: 3Vd.c (“AA” size battery x 2) 1.3.1 Description of EUT Operation The Equipment Under Test (EUT) is a Superior Focus International (Asia) Ltd., 90.489- 104.39MHz FM Wireless Microphone. The EUT continues to transmit while switch on. It is voice transmission, Modulation by Mic. and tape is frequency modulation. 1.4 Date of Order 2001-05-22 1.5 Submitted Sample(s): 2 Samples per model 1.6 Test Duration 2001-06-13 1.7 Country of Origin China Date: 2000-06-18 TEST REPORT Page 7 of 21 No.: HM104846 1.8 Additional Information of EUT Submitted Not Available User Manual Part List Circuit Diagram Printed Circuit Board [PCB] Layout Rating Label Block diagram FCC ID Label Date: 2000-06-18 TEST REPORT Page 8 of 21 No.: HM104846 2.0 Technical Details 2.1 Investigations Requested Perform ElectroMagnetic Interference measurement in accordance with FCC 47CFR [Codes of Federal Regulations] Part 15 and ANSI C63.4:1992 for FCC Certification. 2.2 Test Standards and Results Summary Tables EMISSION Results Summary Test Condition Test Requirement Test Method Class / Test Result Severity Pass Failed N/A Field Strength of Fundamental Emissions & Spurious Emissions FCC 47CFR 15.239 ANSI C63.4: 1992 N/A Radiated Emissions, 30MHz to 1GHz FCC 47CFR 15.209 ANSI C63.4: 1992 Class B Conducted Emissions on AC, 0.45MHz to 30MHz FCC 47CFR 15.207 ANSI C63.4: 1992 Class B Note: N/A - Not Applicable Date: 2000-06-18 TEST REPORT Page 9 of 21 No.: HM104846 3.0 Test Results 3.1 Emission 3.1.1 Radiated 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: 2000-06-18 TEST REPORT Page 10 of 21 No.: HM104846 Limits for Field Strength of Fundamental Emissions [FCC 47CFR 15.239]: Frequency Range of Fundamental Peak Limits Average Limits [MHz] [μV/m] [μV/m] 88-108 2,500 250 Results: Field Strength of Fundamental Emissions Peak Value Frequency Level @3m Correction Factor Field Strength Field Strength Limit ** @3m Antenna Polarity MHz dBμV dB/m dBμV/m μV/m μV/m 90.489 26.7 13.5 40.2 102.3 2,500.0 Horizontal Field Strength of Fundamental Emissions Peak Value Frequency Level @3m Correction Factor Field Strength Field Strength Limit ** @3m Antenna Polarity MHz dBμV dB/m dBμV/m μV/m μV/m 92.55 32.1 13.6 45.7 192.8 2,500.0 Horizontal Field Strength of Fundamental Emissions Peak Value Frequency Level @3m Correction Factor Field Strength Field Strength Limit ** @3m Antenna Polarity MHz dBμV dB/m dBμV/m μV/m μV/m 104.39 29.8 15.5 45.3 184.1 2,500.0 Horizontal Date: 2000-06-18 TEST REPORT Page 11 of 21 No.: HM104846 Results: Field Strength of…

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Marianne Bosley From:Alice Wong [[email protected]] Sent:Saturday, July 21, 2001 4:44 AM To:Marianne Bosley Cc:EED - Choy, Kitty Subject:Re: Superior Focus FCC ID:OY268138 Metrack #11088 Hi Marianne, Sorry for late reply. Here is the answer for Q1 to Q4, Please see attached file. attached file "Q1 & 2" is Question 1 and 2 answer. attached file "200kHz bandwidth" is Q3 answer for factory. attached file "new manual" is revise manual. Thanks Marianne. Have a nice weekend. Best Regards Alice ----- Original Message ----- From: "Marianne Bosley" <[email protected]> To: <[email protected]> Sent: Friday, July 20, 2001 10:45 PM Subject: FW: Superior Focus FCC ID:OY268138 Metrack #11088 > Again, just recapping what is still outstanding. Marianne > > Marianne T. Bosley > EMC Administrator > 410-354-3300, ext. 412 > > > -----Original Message----- > > From: Marianne Bosley > > Sent: Friday, July 13, 2001 2:34 PM > > To: '[email protected]' > > Subject: Superior Focus FCC ID:OY268138 Metrack #11088 > > > > Hi Alice, > > > > Below are the results of the technical review for this application. > > > > > 1. The bandwidth measurements were made with video averaging. This is > > > not > > > acceptable. Please remeasure and submit a new bandwidth plots without > > > averaging (i.e., the VBW must be greater than or equal to the RBW). > > > > > > 2. Was a "loud voice" used as the input to generate the bandwidth > > > plots, such > > > that the output is worst case (i.e., as wide as possible)? If not, > > > please do > > > so (when remeasuring in response to #1, above). > > > > > > 3. 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? Please describe this limiting in > > > detail. > > > > > > 4. The user's maual specifies a tuning range of 92-106 MHz, while the > > > test > > > report indicates a tuning range of 90.48-104.39 Mhz. Which is correct? > > > > > If you need any assistance, please let me know. > > > > Marianne > Q1 & 2.PDF200kHz bandwidth.PDF new manual.PDF

FCC ID: OY268138 Limits for 26 dB Bandwidth of Fundamental Emission: Frequency Range 26dB Bandwidth FCC Limits * [MHz] [KHz] [KHz] 92.55 (Worst) 44.8 200 Results: The following figure is the measured bandwidth of Fundamental Emission. 26dB Bandwidth of Fundamental Emission

FCC ID: OY268138 TEST SET UP PHOTOGRAPH OF THE PRODUCT MEASUREMENT OF RADIATED EMISSION TEST SET UP