SGDMKA381Wireless Microphone

From: Terry Chan ES-HKG Sent: Wednesday, November 03, 2004 3:18 AM To: Roland Gubisch ES-Box Cc: Danielle Fontaine ES-Box; Alfred Lo ES-HKG; Billy Chow ES-HKG Subject: RE: Zonik Certification Application FCC ID: SGDMKA381 Dear Roland, This is the answer to your questions. Administrative: 1. 5V, 28.3mA. 2. As see attached. 3. This is a one channel microphone, so there are no channel switch and the application cover only one frequency. However, in the user manual and block diagram included the corresponding receiver information. It may make some confusing. Technical: 1. The transmitter was operating properly during testing, and that the measured output power is representative of production units confirmed by applicant. Please let me know if any problems. Terry Chan Assistant Engineer Intertek Hong Kong -----Original Message----- From: Roland Gubisch ES-Box Sent: Wednesday, October 27, 2004 11:18 PM To: Terry Chan ES-HKG Cc: Danielle Fontaine ES-Box Subject: Zonik Certification Application FCC ID: SGDMKA381 Dear Terry, Review of this application is complete. The application meets all technical requirements for certification, but these issues need to be addressed before certification can proceed: ADMINISTRATIVE 1) Information on DC power (voltage, current into final RF stage) per 2.1033(c)(8) cannot be found. Please indicate where it is located, or provide. 2) Information on Tune-up procedure per 2.1033(c)(9) cannot be found. Please indicate where it is located, or provide. 3) The User Manual refers to 2 frequencies of operation, but the transmitter itself has no provision for switching frequencies, and the application covers only one frequency. Please explain. TECHNICAL 1) The measured output power of the transmitter (2 microwatts) is very low compared to the allowed power (50 mW), and is low for the intended application. Please confirm that the transmitter was operating properly during testing, and that the measured output power is representative of production units. Thank you, Roland Gubisch

INTERTEK TESTING SERVICE Report no.: 0415833 Equipment Photographs Model : MKA381 (External) FCC ID: SGDMKA381

FCC ID Label and Location FCC ID: SGDMKA381 Size: 1:1

INTERTEK TESTING SERVICE Report no.: 0415833 Equipment Photographs Model : MKA381 (Internal) FCC ID: SGDMKA381 INTERTEK TESTING SERVICE Report no.: 0415833 Equipment Photographs Model : MKA381 (Internal) FCC ID: SGDMKA381 INTERTEK TESTING SERVICE Report no.: 0415833 Equipment Photographs Model : MKA381 (Internal) FCC ID: SGDMKA381 INTERTEK TESTING SERVICE Report no.: 0415833 Equipment Photographs Model : MKA381 (Internal) FCC ID: SGDMKA381 INTERTEK TESTING SERVICE Report no.: 0415833 FCC ID: SGDMKA381 Equipment Photographs Model : MKA381 (Internal)

光日科技有限公司 SUNNY-TECH Electronic Co., Ltd MKA-381 MICROPHONE PART The wireless microphone is use the frequency modulation. The voice signal is through the microphone and microphone amplifier (Q1) apply to the modulator, the oscillation frequency is vary in accordance with the characteristics of the voice signal. Base the characteristics of this VARACTOR DIODE MODULATOR, the oscillation frequency will be shift 20kHz from the frequency of crystal. The LC B.P.F. (L2, C9) is capturing the 10 order harmonic of the oscillation frequency. This signal is apply to the 1 st , 2 nd RF amplifier and the output stage to transmitting. MKA-381 RECEIVER PART The receiver is use the super heterodyne technology. The receiving frequency and the local oscillation frequency is insert to the mixer, it is generate a large number of new frequency. In this circuit is use the 10.7MHz ceramic filter to select the intermediate frequency (IF). The IF signal is pass to the IF amplifier and the detector to recover to audio signal. The audio signal is amplified by the AF amplifier and output to the Power amplifier. 18/F., Po Shau Centre, 115 How Ming Street, Kwun Tong, Kowloon, Hong Kong. Tel.:27930223 Fax.:23421736 Fax.:23448928

MKA-381 ADJUSTMENT PROCEDURE Step Item Adjustment Procedure 1 TX frequency L1 Adjust L1 to obtain TX frequency 2 TX. L2, L3 Adjust L2, L3 to minimize the unwanted harmonic frequency 3 TX. L4, L6, L8 Adjust L4, L6, L8 to obtain not more than 2 μ W TX power 4 TX. Dev. N.A. 1. Insert an audio frequency (AF) -20dBm 2. Check the TX deviation not more than 2.5kHz 3. Check MIC modulation sensitiv ity, and it should be 2.5~10mV 5 RX L2, L3, L4 Adjust L2, L3, L4 to obtain demanded receiving sensitivity 6 RX L2, L3, L4 Adjust L2, L3, L4 to obtain demanded image frequency

FCC ID: SGDMKA381 Modulation Frequency Response 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 100 600 1100 1600 2100 2600 3100 3600 4100 4600 5100 Modulation Frequency (Hz) Frequency Deviation (kHz) FCC ID: SGDMKA381 Modulation Frequency Response 05 101520253035404550 100 600 1100 1600 2100 2600 3100 3600 4100 4600 5100 Modulation Frequency (Hz) Modulation Index

FCC ID: SGDMKA381 Modulation Limiting 02468 1012 67 77 87 97 107 117 127 Modulation Input (dBSPL) Peak Frequency Deviation (kHz) at 500Hzat 1000Hzat 2500Hzat 5000Hz

Intertek Testing Services Hong Kong Ltd. 2/F., Garment Centre, 576 Castle Peak Road, Kowloon, Hong Kong. Tel: (852) 2173 8888 Fax: (852) 2785 5487 Website: www.hk.intertek-etlsemko.com October 18, 2004 Zonik Industrial Co., Ltd. Rm. 1404, Blk. A, Wah Seng Ind. Bldg., 14-18 Wong Chuk Yeung St., Shatin, N.T., Hong Kong. Dear Mr. Jacob Lai: Enclosed you will find your file copy of a Part 90 report (FCC ID: SGDMKA381). For your reference, TCB will normally take another 15-20 days for reviewing the report. Approval will then be granted when no query is sorted. Please contact me if you have any questions regarding the enclosed material. Sincerely, Billy Chow Senior Supervisor Signed for and on behalf of Intertek Hong Kong ETL SEMKO Enclosure FCC ID: SGDMKA381 • 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 shall not be reproduced except in full without prior authorization from Intertek Testing Services Hong Kong Limited • 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 Hong Kong Ltd. 2/F., Garment Centre, 576 Castle Peak Road, Kowloon, Hong Kong. Tel: (852) 2173 8888 Fax: (852) 2785 5487 Website: www.hk.intertek-etlsemko.com Zonik Industrial Co., Ltd. Application For Certification FCC Part 90.265(b) (FCC ID: SGDMKA381) Wireless Microphone WO# 0415833 TC/el October 18, 2004 FCC ID: SGDMKA381 INTERTEK TESTING SERVICES FCC ID: SGDMKA381 i LIST OF EXHIBITS INTRODUCTION EXHIBIT 1 : General Description EXHIBIT 2: System Test Configuration EXHIBIT 3: RF Power Output EXHIBIT 4: Modulation Characteristics EXHIBIT 5: Occupied Bandwidth EXHIBIT 6: Spurious Emission EXHIBIT 7: Frequency Stability EXHIBIT 8: Equipment Photographs EXHIBIT 9: Product Labelling EXHIBIT 10: Technical Specifications EXHIBIT 11: Instruction Manual INTERTEK TESTING SERVICES FCC ID: SGDMKA381 ii MEASUREMENT/TECHNICAL REPORT Zonik Industrial Co., Ltd. - MODEL: MEMOREX MKA381 FCC ID: SGDMKA381 This report concerns (check one:) Original Grant X Class II Change _____ Equipment Type: Wireless Microphone Deferred grant requested per 47 CFR 0.457(d)(1)(ii)? Yes No X If yes, defer until: date Company Name agrees to notify the Commission by: date of the intended date of announcement of the product so that the grant can be issued on that date. If no, assumed Part 90, Subpart K for Special Frequencies or Frequency Bands - the new 47 CFR [10-01-03 Edition] provision. Report prepared by: Billy Chow Intertek Testing Services 2/F., Garment Centre, 576, Castle Peak Road, Kowloon, Hong Kong Phone: 852-2173-8545 Fax: 852-2371-0914 INTERTEK TESTING SERVICES FCC ID: SGDMKA381 iii Table of Contents 1.0 General Description................................................................................................. 3 1.1 Product Description............................................................................................. 3 1.2 Related Submittal(s) Grants ................................................................................ 3 1.3 Test Methodology................................................................................................ 4 1.4 Test Facility ......................................................................................................... 4 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 ....................................................................................... 7 2.5 Measurement Uncertainly ................................................................................... 7 2.6 Support Equipment List and Description ............................................................. 7 3.0 RF Power Output ...................................................................................................... 9 4.0 Modulation Characteristics ........................................................................................ 12 4.1 Modulation Frequency Response .................................................................... 13 4.2 Modulation Limiting .......................................................................................... 15 5.0 Occupied Bandwidth ............................................................................................. 18 6.0 Spurious Emission ................................................................................................ 20 6.1 Field Strength of Spurious Radiation ............................................................... 21 7.0 Frequency Stability ................................................................................................ 24 7.1 Frequency Stability – Voltage .......................................................................... 25 7.2 Frequency Stability – Temperature .................................................................. 27 8.0 Equipment Photographs ....................................................................................... 30 9.0 Product Labelling................................................................................................... 32 10.0 Technical Specifications....................................................................................... 34 11.0 Instruction Manual ................................................................................................. 36 INTERTEK TESTING SERVICES FCC ID: SGD…

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