QSRKST1UWIRELESS MICROPHONE TRANSMITTER

12 A B 21 B A Title NumberRevisionSize A4 Date:18-Dec-2006Sheet of File:F:\KST-1U\KLT-1U~1.SCHDrawn By: BT1 3.0V +7V +5V(VCO) VR2 +5V(RF) 1 2 3 4 5 6 7 8 9 10 JP1 AUDIO +5V(VCO) +5V(RF) SUPPLY SWITCHER SUPPLY SWITCHER SUPPLY SWITCHER SUPPLY Oscillator 32.768KHz Oscillator O/PCOMPRESSOR (U1B;IC1) O/P MCU (Q3,Q4) (U1C) (U1A) (IC5) (Q6,IC2) (Q11) (Q12) (Q13,Q7) SUPPLY DISPLAY (Q9,Q10,Q2,IC3) 1 2 3 MK2 CON3 AUDIO 12 A B 21 B A Title NumberRevisionSize A4 Date:18-Dec-2006Sheet of File:F:\KST-1U\KST-1U~1.SCHDrawn By: 1 2 3 4 5 6 7 8 9 10 JP1 VCO (Q3,Q4) RF AMP (Q1,Q5) FREQUENCY SYNTHESIZER (IC1)

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QSRKST1U FCCID label Frequency range: 720MHz – 806MHz Enping Karsect Electronics Corp Ltd This device complies with Part 74 of FCC Rules FCC ID: QSRKST1U

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Theory Of Operation 1, Switch on the power, then all the components are on power 2, Audio signals are acquired from the MIC. 3, Carrier Frequency are produced by Crystal Responser(X1). 4, Audio signals are modulated on the Carrier Frequency by the way of F3E. 5, The modulated signal will be amplified. 6. The amplified signal will then be transmitted to the air by the transmitting antenna.

KST-1U-AF Part Used PartType Designators ------------------------------------------------------------------------ 1 20 C1 C3 C19 C20 C21 C22 C27 C34 R1 R2 R3 R8 R9 R24 R26 R31 R32 R42 R43 R53 2 3 0R C26 R52 R63 3 2 1K R12 R47 4 4 1U C51 C2 C7 C57 5 1 2.2K R67 6 1 3K3 R23 7 1 4M Y1 8 1 5.6K R38 9 1 6.8K R39 10 2 8.2UH L1 L3 11 20 10K R11 R14 R17 R18 R19 R27 R33 R34 R37 R40 R41 R46 R50 R54 R55 R62 R65 R66 R68 VR2 12 13 10U C48 C54 C56 C5 C6 C12 C13 C14 C15 C16 C17 C18 C50 13 1 16C505 IC5 14 3 22K R45 R60 R70 15 2 22u C10 C11 16 1 22u/16V C59 17 2 30P C60 C61 18 1 32.768KHz Y2 19 5 33K R35 R36 R48 R56 R57 20 2 33P C23 C43 21 1 33R R49 22 1 39K R59 23 1 47K R20 24 1 47P C44 25 1 47R R22 26 1 68P C30 27 2 68nH L4 L5 28 1 75K R21 29 3 82K R28 R51 R69 30 10 100K R4 R5 R6 R7 R10 R25 R44 R61 VR1 VR3 31 2 100U C52 C55 32 1 100UH L2 33 2 101 C42 C45 34 1 102 C47 35 1 103 C46 36 12 104 C24 C28 C29 C31 C32 C33 C35 C37 C38 C39 C40 C41 37 1 120K R29 38 1 150K R58 39 1 151 Q6 40 1 201 C58 41 3 220K R13 R15 R30 42 1 330R R16 43 5 2907 Q9 Q10 Q11 Q12 Q13 44 1 4148 D9 45 1 6367 IC2 46 6 9013 Q2 Q3 Q4 Q5 Q7 Q8 47 1 9015 Q1 48 1 BATTERY BT1 49 1 BAV70 Q15 50 1 BAV99 Q14 51 1 CON3 MK2 52 1 CON10 JP1 53 2 GREEN D3 D4 54 2 LED D1 D2 55 1 LM339 IC3 56 1 NE571 IC1 57 1 RED D5 58 1 SIP5 JP2 59 3 SS14 D6 D7 D8 60 1 SW SW1 61 1 TL084 U1 62 1 IR IC6 KST-1U-RF Part Used PartType Designators ------------------------------------------------------------------------ 1 8 C20 C59 L19 R10 R12 TP1 TP2 TP3 2 1 0.75P C52 3 1 1-3P VC1 4 1 1.8K R7 5 1 1.8P C19 6 4 1K R14 R22 R23 R28 7 4 1P C12 C30 C37 C47 8 1 1SV329 VD2 9 2 1uH L3 L4 10 1 2.2P C40 11 8 2P C21 C29 C31 C35 C43 C44 C46 C51 12 1 3.3K R21 13 1 3P C36 14 1 4.7nH L11 15 1 4P C33 16 1 5-30P VC2 17 1 5.1K R1 18 1 6P C45 19 1 8.2nH L12 20 1 8.2uH L15 21 4 10K R4 R16 R17 R24 22 1 10M X1 23 1 10nH L2 24 4 10uF/16V C18 C58 C60 C61 25 1 15nH L14 26 1 18P C49 27 1 18nH L13 28 2 20P C17 C32 29 4 22P C11 C22 C24 C38 30 3 22R R6 R11 R13 31 1 22nH L8 32 1 22uF/16V C39 33 1 27P C25 34 1 30P C50 35 2 33K R9 R26 36 1 33P C42 37 2 47K R8 R15 38 2 68P C23 C26 39 3 68nH L5 L6 L7 40 3 100K R19 R25 R27 41 2 100R R5 R29 42 1 100uF C16 43 7 101 C8 C13 C14 C28 C34 C41 C54 44 8 102 C2 C3 C4 C5 C6 C9 C10 C27 45 2 104 C7 C15 46 2 220R R2 R3 47 1 330R R20 48 1 471 C48 49 1 560R R18 50 2 4226 Q3 Q4 51 1 BB143 VD1 52 1 CON5*2 JP1 53 1 MB15E03SL IC1 54 1 R37 Q5 55 1 R44 Q1

Page 1 of 1 FCCID: QSRKST1U Dec. 19, 2006. Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 I would like to confirm this device (FCCID: QSRKST1U) does not have tune up information because the tune up is fixed by the manufacturer. Therefore, the user cannot tune up the device. Sincerely, Enping Karsect Electronics Corp Ltd ------------------ Fangxiang He(Mr.) Director

1234 A B C D 4321 D C B A Title NumberRevisionSize A4 Date:27-Dec-2006Sheet of File:E:\PCB\志\NADY-UH-1K\MyDesign.ddbDrawn By: C52 0.75P R24 10K R20 330R R18 560R R21 3.3K R5 100R C40 2.2P R7 1.8K R2 220R C39 22uF/16V C13 101 C15 104 R19100K C28 101 C7 104 R25 100K VC1 1-3P AF IN R16 10K C41 101 VD1 BB143 C19 1.8P C44 2P R17 10K R8 47K C38 22P C14 101 C11 22P +3V-3 C59 C4 102 R10 Q5 R37 R3 220R C33 4P R11 22R R6 22R C23 68P C34 101 R13 22R R9 33K C5 102 C30 1P C51 2P C29 2P C32 20P R12 +3V C46 2P C27 102 C17 20P C37 1P C35 2P C21 2P C20 VD2 1SV329 R29 100R R27 100K L19 L7 68nH L13 18nH L2 10nH L5 68nH L12 8.2nH L14 15nH L8 22nH L6 68nH X1 10M R4 10K C50 30P VC2 5-30P C6 102 OSCin 1 OSCout 2 Vp 3 Vcc 4 DO 5 GND 6 xfin 7 fin 8 CLK 9 DA 10 LE 11 PS 12 ZC 13 LD/fout 14 P 15 R 16 IC1 MB15E03SL C3 102 R23 1K R14 1K R22 1K C2 102 +3V-3 1 2 3 4 5 6 7 8 9 10 JP1 CON5*2 +3V C18 10uF/16V C45 6P C47 1P C43 2P Q1 R44 C54 101 R15 47K C48 471 +3V-3 R26 33K C42 33P C36 3P C24 22P C25 27P C31 2P C22 22P AF IN L4 1uH C26 68P C9 102 L3 1uH C10 102 C8 101 Q4 4226 Q3 4226 C60 10uF/16V C16 100uF L15 8.2uH C58 10uF/16V C61 10uF/16V L11 4.7nH R28 1K R1 5.1K C12 1P C49 18P TP1 ANTENNA

Report Number: HST0612MIC0201F Page 1 of 40 ELECTROMAGNETIC EMISSIONS COMPLIANCE REPORT INTENTIONAL RADIATOR CERTIFICATION TO FCC PART 74 SUBPART H REQUIREMENT OF Wireless Microphone Transmitter MODEL NO.: KST-1U BRAND NAME: N/A FCC ID: QSRKST1U REPORT NO: HST0612MIC0201F ISSUE DATE: December 21, 2006 Prepared for Enping Karsect Electronics Corp Ltd No.32 Xinping Road EnpingGuangDongChina. Prepared by GUANGZHOU HUESENT TESTING SERVICE CO., LTD. d.b.a. GUANGZHOU HUESENT TESTING SERVICE CO., LTD. NO. 91, DONGGUANZHUANG RD., TIANHE DISTRICT,GUANGDONG,P.R. CHINA TEL: 86-020-87221905 FAX: 86-020-87223892 Report Number: HST0612MIC0201F Page 2 of 40 VERIFICATION OF COMPLIANCE Applicant: Enping Karsect Electronics Corp Ltd No.32 Xinping Road，Enping，GuangDong，China. Product Description: Wireless Microphone Transmitter Brand Name: N/A Model Number: KST-1U Serial Number: N/A File Number: HST0612MIC0201F Date of Test: December 17,2006 ~ December 21, 2006 We hereby certify that: The report for the equipment was prepared by GUANGZHOU HUESENT TESTING SERVICE CO., LTD.The test data, data evaluation, test procedures, and equipment configurations shown in this report were made in accordance with the procedures given in TIA/EIA 603; ANSI C 63.4:2003 and the sample tested as described in this report is in compliance with the FCC Rules Part 74 Subpart H. The test results of this report relate only to the tested sample identified in this report. Approved By Henly / Q.A. Manager GUANGZHOU HUESENT TESTING SERVICE CO., LTD. Report Number: HST0612MIC0201F Page 3 of 40 Table of Contents 1. GENERAL INFORMATION .............................................4 2. SYSTEM TEST CONFIGURATION .............................................7 3. SUMMARY OF TEST RESULTS ............................................10 4. DESCRIPTION OF TEST MODES .............................................10 5. MAXIMUM TRANSMITTER POWRE ..........................................11 6. MODULATION CHARACTERISTICS ..........................................14 7. FREQUENCY TOLERANCE .........................................22 8. EMISSION BANDWIDTH ...........................................26 9. UNWANTED RADIATION .............................................29 APPENDIX 1 PHOTOGRAPHS OF SETUP ..............................................35 Report Number: HST0612MIC0201F Page 6 of 40 2. System Test Configuration 2.1 EUT Configuration The EUT configuration for testing is installed on RF field strength measurement to meet the Commission’s requirement and operating in a manner which intends to maximize its emission characteristics in a continuous normal application. 2.2 EUT Exercise The Transmitter was operated in the normal operating mode. the TX frequency was fixed which was for the purpose of the measurements. 2.3 GENERAL TECHNICAL REQUIREMENTS a). Section 74.861 (e) - 1: Maximum transmitter power less than 250mW b). Section 74.861 (e) - 3: Peak Frequency Deviation less than ±75 KHz c). Section 74.861 (e) - 4: Frequency Tolerance less than 0.005% d). Section 74.861 (e) - 5: Emission Bandwidth shall less than 200KHz e). Section 74.861 (e) - 6: Unwanted radiation According to Section 74.861 (e) – 6, the mean power of emission shall be attenuated below the mean output power of the transmitter in accordance with the following schedule: 1). At least 25 dB on any frequency removed from the center of the authorized bandwidth by more than 50% up to and including 100% of the authorized bandwidth. 2). At least 35 dB on any frequency removed from the center of the authorized bandwidth by more than 100% up to and including 250% of the authorized bandwidth. 4). At least 43 + 10 log 10 (T) dB on any frequency removed from the center of the authorized bandwidth by more than 250%. Report Number: HST0612MIC0201F Page 7 of 40 2.4 Configuration of Tested System Fig. 2-1 Configuration of Tested System EUT Report Number: HST0612MIC0201F Page 8 of 40 Table 2-1 Equipment Used in Tested System Item Equipment Mfr/Brand Model/Type No. FCC ID Series No. Note E-1 Wireless Microphone Transmitter N/A KST-1U QSRKST1U N/A EUT Report Number: HST0612MIC0201F Page 9 of 40 3. SUMMARY OF TEST RESULTS FCC Rules Description Of Test Result §74.861 (e)-1 Carrier Power Compliant §74.861 (e)-3 Frequency Deviation Compliant §74.861 (e)-4 Frequency Tolerance Compliant §74.861 (e)-5 Operating Bandwidth Compliant §74.861 (e)-6 Unwanted Radiation Compliant 4. DESCRIPTION OF TEST MODES The EUT (Wireless Microphone Transmitter) has been tested under normal operating condition. Three channels ( the top one-806.00 MHz, the middle one-763.00 MHz and the bottom one-720.00 MHz) have been chosen for testing. On each channel three axes have been evaluated for radiated emission. Report Number: HST0612MIC0201F Page 10 of 40 5. MAXIMUMN TRANSMITTER POWER 5.1 PROVISIONS APPLICABLE According to FCC Part 74 Section 74.861(e) – 1: The power of the measured unmodulated carrier power at the output of the transmitter power amplifier may not exceed 250mW 5.2 MEASUREMENT PROCEDURE 1). On a test site, the EUT shall be placed on a turntable, and in the position closest to the normal use as declared by the user. 2). The test antenna shall be oriented initially for vertical polarization located 3m from the EUT to correspond to the transmitter. 3). The output of the antenna shall be connected to the measuring receiver and either a peak or quasi-peak detector was used for the measurement as indicated on the report. The detector selection is based on how close the emission level was approaching the limit. 4). The transmitter shall be switched on; if possible, without the modulation and the measurement receiver shall be tuned to the frequency of the transmitter under test. 5). The test antenna shall be raised and lowered through the specified range of height until the measuring receiver detects a maximum signal level. 6). The transmitter shall than be rotated through 360°in the horizontal plane, until the maximum signal level…

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Test setup Photograph