RFP-DH902Wireless Microphone

Applicant: Dexun Electronic Technology Co., Ltd. FCC ID: RFP-DH902 Users Manual

Applicant: Dexun Electronic Technology Co., Ltd. FCC ID: RFP-DH902

Applicant: Dexun Electronic Technology Co., Ltd. FCC ID: RFP-DH902 (1) EUT view

Applicant: Dexun Electronic Technology Co., Ltd. FCC ID: RFP-DH902 Proposed Label Location on EUT EUT Bottom View/Proposed FCC ID Location FCC ID: RFP-DH902

Applicant: Dexun Electronic Technology Co., Ltd. FCC ID: RFP-DH902 (2) EUT inside whole view (3) Main board component side (4) Main board solder side

Applicant: Dexun Electronic Technology Co., Ltd. FCC ID: RFP-DH902 Operational Description 1、Audio 1）MICAMP（IC1） This amplifiers the voice signal of 50Hz~15KHz by about 20dB and makes pre-emphasis features of 50us. 2）Compressor（IC2） This does limit the amplitude and compresses the voice signal not to make the pre-emphasis over modulated in RF Modulator. 3）Regulator（IC3） This makes standard voltage for MIC AMP and RF part being supplied power from 9V Battery. 4）Adjust the Distortion Adjusting the Distortion with semi-volume can minimize the noise of pre-emphasis compressor and MIC AMP. 2、RF 1）Oscillator（Q1） This is a transmitting carrier oscillator that modulates the voice signal supplied for Audio to frequency and then oscillates third-time overtone and becomes standard oscillation for RF Carrier. 2）MULTI（Q2） This multiplies the frequency oscillated from Q1.(FREQ: multiplied frequency) 3）MULTI（Q3） This also multiplies the frequency multiplied in Q2. (FREQ: multiplied frequency) 4）Buffer This doesn’t make the antenna affect the internal circuit when connecting the antenna and final carrier multiplied from Q3.

Applicant: Dexun Electronic Technology Co., Ltd. FCC ID: RFP-DH902 MODE：DR902 SN：30714100 Part No. Value No. on bord Quantity DR902S-PCB 1 47R R3,4,8,15,16,23,24,28,35,36, 71, 44,90,132,137 15 100R R7,9,25,27,29,47,77,81,83A,95, 121,125 12 330R R10,12,14,20,31,32,34,40,41, 87 10 1K R6,42,46,136,26,88,92,134,54, 97,111,66,69,113,126,86,75,76, 85,85A,119 21 1.5K R57,103,58 3 2.2K R11,49,30,94,129,80,82,83,130, 131 10 3.3K R13,18,33,38,127 5 4.7K R63,109 2 5.6K R70,115 2 10K R43,56,89,102,50,53,51,64,96, 98,99,108,67,114,72,73,78,74, 116,117,122,118 22 15K R80A,124 2 22K R61,62,106,107,68,112,79,84, 83B,120,123 11 33K R59,65,104,110 4 47K R41,105 2 56K R17,19,55,37,39,101 6 100K R1,2,21,22,48,93 6 150K R45,135,91,135’ 4 1M R52,110 2 10K WR1,WR2,WR3,WR4 4 VR 10K P1,P2 2 VR 1uF C77,116 2 4.7uF C34,30,74,76,108,64,110,68, 81,83,84,82,79,112,118,119, 114,117,88,90,91,94,93,99,95, 100,98,102,133,123,124,125, 128,127,134,135,129 37 10uF C73,109 2 47uF C89 1 100uF C137,42,142A 3 1000uF C141 1 3300uF C138 1 MODE：DR902 SN：30714101 Part No. Value No. on bord Quantity 0.5pF C5,39 2 2pF C9,43 2 5pF C3,37 2 10pF C4,16,50,38 4 50pF C45,113 2 470pF C69,70,71,104,105,104’, 105’,105” 8 100pF C92,126,97,132,101,96,142B, 130,131 9 102 C1,35,7,8,13,14,15,22,17,18,19, 21,23,20,41,42,48,49,51,55, 52,53,54,58,59,18,85,122 34 103 C10,44,25,26,27,28,32,33,29,31, 57,60,61,62,66,67,63,65,86,121 20 104 C72,75,78,87,107,111,115,120, 104”,106 10 * C2,6,11,12,36,40,45,46 8 A1186N IC1,3 2 SL1018 IC2,4 2 RC4558P IC7,8,10,11 4 LM339 IC5 1 UTC571N IC6 1 LM7809 IC9 1 BF998 Q1,3 2 T33 Q2,4 2 9014 15 9015 3 1N4001 D1 1 1N4148 D2,3,4,5,6,7,8,9,10,11,12 11 10.7JA FL1,2,3,4 4 7500 6 9685 2 1716 2 1718 2 11 T1,2 2 X1,2 2 7mm J1-28 28

Applicant: Dexun Electronic Technology Co., Ltd. FCC ID: RFP-DH902 Tune-UP Procedure 1、Input power to this device and check the voltage and the current consumption： 9V+ 1V，25~30mA. 2、After connecting the Antenna terminal to spectrum Analyzer, adjust L5 and VC1 for maximum power of the fundamental frequency and minimum power of the spurious frequency. 3、Adjust T3 and T2 for minimum power of spurious frequency。 4、Turn the core of T1 counterclockwise to adjust the level of RF output power from low to high. 5、Connect the Antenna terminal to Frequency Counter and then adjust T4 for the proper frequency. 6、Apply 100mV of audio at 1KHz to the terminal of this device with Audio signal Generator and adjust VR1 to modulate to 15KHz.

The test report consists 30 pages in total. It may be duplicated completely for legal use with the allowance of the applicant. It shall not be reproduced except in full, without the written approval of Ke Mei Ou Laboratory Corporation. The test result in the report only applied to the tested sample. FCC TEST REPORT Under FCC Part 74 Subpart H, Prepared For: Dexun Electronic Technology Co., Ltd. North Banlieue Aote Industry Building Enping Guangdong, China. September 26, 2003 FCC ID: RFP-DH902 EUT: Wireless Microphone Model: DH-902 Report Type: Original Report Test Engineer: Peter Lin Test Date: September 6, 2003 Review By: Apollo Liu / Manager FEDERAL COMMUNICATIONS COMMISSION Registration Number: 125782 Ke Mei Ou Laboratory Co., Ltd. 7A, Jiaxiangge, Jiahuixincheng, No.3027, Shennan Rd., Futian, Shenzhen, Guangdong, P.R.China. Zip Code: 518033 Tel: + 86 755 83642690 Fax: + 86 755 83297077 www.kmolab.com Dexun Electronic Technology Co., Ltd. FCC ID: RFP-DH902 FCC ID Report Report #: KSZ2003070202J Page 2 of 2 TABLE OF CONTENTS 1. General Information...........................................................................................................................................................3 1. 1 Notes...............................................................................................................................................................................3 1. 2 Testing Laboratory..........................................................................................................................................................3 1. 3 Details of Applicant........................................................................................................................................................3 1. 4 Application Details.........................................................................................................................................................3 1. 5 Test Item.........................................................................................................................................................................3 1. 6 Test Standards.................................................................................................................................................................4 2. Technical Test.......................................................................................................................................................................5 2. 1 Summary of Test Results................................................................................................................................................5 3. EUT Modifications..............................................................................................................................................................6 4. Conducted Power Line Test................................................................................................................................................7 4. 1 Test Equipment...............................................................................................................................................................7 4. 2 Test Procedure................................................................................................................................................................7 4. 3 Test Setup.......................................................................................................................................................................7 4. 4 Configuration of The EUT..............................................................................................................................................8 4. 5 EUT Operating Condition...............................................................................................................................................9 4. 6 Conducted Power Line Emission Limits........................................................................................................................9 4. 7 Conducted Power Line Test Result...............................................................................................................................10 5. Output Power Measurement..............................................................................................................................................11 5. 1 Test Equipment.............................................................................................................................................................11 5. 2 Test Procedure..............................................................................................................................................................11 5. 3 Test Setup.....................................................................................................................................................................11 5. 4 Configuration of The EUT............................................................................................................................................12 5. 5 EUT Operating Condition.............................................................................................................................................12 5. 6 Rules and Specification Limits.....................................................................................................................................12 5. 7 Output Power Test Result.............................................................................................................................................12 5. 8 Result Calculation.........................................................................................................................................................13 6. Modulation Characteristics..............................................................................................................................................1…

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Applicant: Dexun Electronic Technology Co., Ltd. FCC ID: RFP-DH902 Radiated emission test view