ZTJ-VAM90WIRELESS MICROPHONE SYSTEM

PV1 VHF 174-216 174-216MHz. Note This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -- Reorient or relocate the receiving antenna -- Increase the separation between the equipment and receiver. -- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -- Consult the dealer or an experienced radio/TV technician for help. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment. Such modifications could void the user's authority to operate the equipment. The antenna used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operated in conjunction with any other antenna or transmitter

Shenzhen Uniwisdom Technologies Co., Ltd. FCC ID: ZTJ-VAM90 POWER OF ATTORNEY August 18, 2011 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To Whom It May Concern: We, the undersigned, hereby authorize Waltek Services (ShenZhen) Co., Ltd. (Philo Zhong) on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Waltek Services (ShenZhen) Co., Ltd. (Philo Zhong) on our behalf shall have the same effect as acts of our own. This authorization expires on August 17, 2012. This is to advise that we are in full compliance with the Anti-Drug Abuse Act. We, Shenzhen Uniwisdom Technologies Co., Ltd., are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section. Sincerely,

2.1 Product View 2.2 EUT – Front View 2.3 EUT – Back View

Page:25 of 25 Shenzhen Uniwisdom Technologies Co., Ltd. FCC ID: ZTJ-VAM90 WALTEK SERVICES Reference No.: WT11073744-E-E-F 8 FCC Label This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:(1)this device may not cause harmful interference,and (2) this device must accept any interference received, including interference that may cause undesired operation The Label must not be a stick-on paper. The Label on these products must be permanently affixed to the product and readily visible at the time of purchase and must last the expected lifetime of the equipment not be readily detachable. FCC ID:ZTJ-VAM90 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

FCC ID Label Sample for Model: VAM-90; PV-1 V1 HH(RECEIVER); PV-1 V1 BL(RECEIVER); PV-1V1 BHS(RECEIVER); PV-1 V1 BG(RECEIVER) FCC ID:ZTJ-VAM90 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

2.1 EUT – Open View 2.2 PCB – Front View 2.3 PCB – Back View

Circuit Description RF part: The signal received by ANT A or ANT B is selected by the frequency-selection circuit which is comprised of D4, IC13, IC11 and U10, after that the selected signal is amplified by Q5, then the MIX, the crystal of which is from 55.817MHz ~ 67.933MHz, pick out 10.7MHz IF signal. The IF signal is amplified by Q3 and demodulated by U4. AF part: The demodulated audio signal is amplified by U1 and U7, after volume controlled or amplified, the signal is outputted.

旧 VHM-90 RX.sch-1 - Mon Apr 02 09:32:45 2007 旧 VHM-90 RX.sch-2 - Mon Apr 02 09:32:53 2007

Page: 1 of 25 FCC TEST REPORT WALTEK SERVICES Reference No.: WT11073744-E-E-F FCC ID : ZTJ-VAM90 Applicant : Shenzhen Uniwisdom Technologies Co., Ltd. Address : Bldg.91-94 3rd Industrial Zone, Lisonglang, Gongming Town, Bao'an District, Shenzhen, P.R.China Equipment Under Test (EUT) : Product Name : Wireless Microphone System Model No. : VAM-90; PV-1 V1 HH(RECEIVER); PV-1 V1 BL(RECEIVER); PV-1V1 BHS(RECEIVER); PV-1 V1 BG(RECEIVER) Standards : FCC CFR47 Part 15 Section 15.109:2009 Date of Test : August 15 ~ August 17, 2011 Date of Issue : August 18, 2011 Test Engineer : Hunk yan Reviewed By : Philo zhong Test Result : PASS Prepared By: Waltek Services (Shenzhen) Co., Ltd. 1/F, Fukangtai Building, West Baima Rd., Songgang Street, Baoan District, Shenzhen 518105, China Tel :+86-755-27553488 Fax:+86-755-27553868 — The sample detailed above has been tested to the requirements of Council Directives ANSI C63.4:2003. The test results have been reviewed against the Directives above and found to meet their essential requirements. Page:2 of 25 Shenzhen Uniwisdom Technologies Co., Ltd. FCC ID: ZTJ-VAM90 WALTEK SERVICES Reference No.: WT11073744-E-E-F 2 Test Summary FCC Part 15 Subpart B Requirements Test Items Test Requirement Test Method Result Radiated Emission (30MHz to 2GHz) Part 15 Section 15.109 ANSI C63.4: 2003 PASS Conducted Emission (150KHz to 30MHz) Part 15 Section 15.107 ANSI C63.4: 2003 PASS Page:3 of 25 Shenzhen Uniwisdom Technologies Co., Ltd. FCC ID: ZTJ-VAM90 WALTEK SERVICES Reference No.: WT11073744-E-E-F 3 Contents 1 COVER PAGE....................................................................................................................1 2 TEST SUMMARY .................................................................................................................................................. 2 3 CONTENTS............................................................................................................................................................. 3 4 GENERAL INFORMATION ................................................................................................................................ 4 4.1 CLIENT INFORMATION........................................................................................................................................... 4 4.2 GENERAL DESCRIPTION OF E.U.T. ........................................................................................................................ 4 4.3 DETAILS OF E.U.T................................................................................................................................................. 4 4.4 DESCRIPTION OF SUPPORT UNITS.......................................................................................................................... 4 4.5 STANDARDS APPLICABLE FOR TESTING................................................................................................................ 4 4.6 TEST FACILITY...................................................................................................................................................... 5 4.7 TEST LOCATION.................................................................................................................................................... 5 5 EQUIPMENT USED DURING TEST .................................................................................................................. 6 6 FCC PART 15 SUBPART B REQUIREMENTS ................................................................................................ 8 6.1 CONDUCTED EMISSION DATA...............................................................................................................................8 6.1.1 E.U.T. Operation ........................................................................................................................................ 8 6.1.2 EUT Setup ................................................................................................................................................... 9 6.1.3 Conducted Emission Test Result................................................................................................................. 9 6.1.4 Photograph – Conducted Emission Test Setup......................................................................................... 12 6.2 RADIATION EMISSION DATA...............................................................................................................................13 6.2.1 Measurement Uncertainty......................................................................................................................... 13 6.2.2 EUT Setup ................................................................................................................................................. 14 6.2.3 Spectrum Analyzer Setup .......................................................................................................................... 15 6.2.4 Test Procedure.......................................................................................................................................... 16 6.2.5 Corrected Amplitude & Margin Calculation ............................................................................................ 16 6.2.6 Summary of Test Results ........................................................................................................................... 16 6.2.7 Photograph – Radiation Emission Test Setup .......................................................................................... 21 7 PHOTOGRAPHS - CONSTRUCTIONAL DETAILS...................................................................................... 22 7.1 PRODUCT VIEW................................................................................................................................................... 22 7.2 EUT – FRONT VIEW..........................................................................................…

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2.1 Photograph – Conducted Emission Test Setup 2.2 Photograph – Radiation Emission Test Setup Below 1GHz Above 1GHz