AAO3201257TWireless Microphone

ADDENDUM “IMPORTANT NOTE: To comply with the FCC RF exposure compliance requirements, no change to the antenna or the device is permitted. Any change to the antenna or the de vice could result in the system exceeding the RF FCC NOTICE For RF exposure exposure requirements.” Warning: Modifying, tampering with, or adjusting this unit, or replacing any transmitter component (crystal, semiconductor, etc.) may result in a violation of the FCC rules. This wireless microphone system complies with Part 90 of the FCC Rules. There are three frequencies available for the system. You must obtain a license for each frequency you plan to use before operating your system. One license can include both frequencies. Visit http://wireless.fcc.gov/uls/, or call your local FCC office to apply for your license. Your ability to obtain a license will depend on how you plan to use the system. Wireless lapel microphone system 32-1257 IMPORTANT AE0019AAA1 Printed in China To maintain compliance with the FCC’s RF exposure guidelines, hold the transmitter and antenna at least 1 inch (2.5 centimetres) from your face and speak in a normal voice, with the antenna pointed up and away from the face. Ensure that the antenna is at least 1 inch (2.5 centimetres) from your body when you are using your wireless microphone. Use only the supplied antenna. Unauthorized antennas, modifications, or attachments could damage the transmitter and may violate FCC regulations. Your wireless microphone contains a low power transmitter. When the EUT is powered on, it sends out radio frequency (RF) signals. In August 1996, the Federal Communications Commissions (FCC) adopted RF exposure guidelines with safety levels for wireless devices. For devices less than 200mW ERP SAFETY INFORMATION

Pre-amp Compressor GI6552D Sens. Adj Varactor Osc. Circuit Freq:169.505/ 170.245/ 171.905MHz Buffer SAW Filter 170/172MHz Matching Circuit PA-Driver P.A. LPF MIC Dry Cell AA x 2 OFF/ STANDBY/ TALK switch 1.8V Regulator Low Battery Detect Circuit Low Battery Indicator 32-1257 Transmitter Block DiagramNov24, 2004 Mic Wire Mute Switch OFF/ STANDBY/ TALK switch

Tandy Electronics ( China ) Limited - ShenZhen R&D Centre 唐德电子（中国）有限公司深圳办事处 6/F&7/F, M.C.Packaging Building,9 th Sub-District, Lian Tang Industrial Estate, ShenZhen GuangDong,P.R.China 中国广东深圳莲塘工业区第九分区美特大厦六/七层 Tel : (0755)25701244 Fax: (0755)25703775 Postcode:518004 Dear Sir/Madam, I, an officer of Tandy Electronics (China) Limited, do hereby authorize Intertek Testing Services to act on our behalf in front of the Federal Communications Commission with respect to all matters relating to certification of equipment under Part 15 and Part 90 of the FCC Rules until further notice. I further certify that no party (as defined in §1.2002(b) of CFR 47, 1992) to this application, including myself, is subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C., 853(a). Dated this 3 rd day of May 2005. By: __________________ __ Alex Lui__ Sigurature Printed Title: Project Manager

INTERTEK TESTING SERVICE Report no.: 0505526 Equipment Photographs Model : 32-1257 (External) FCC ID: AAO3201257T INTERTEK TESTING SERVICE Report no.: 0505526 FCC ID: AAO3201257T Equipment Photographs Model : 32-1257 (External)

INTERTEK TESTING SERVICE Report no.: 0505526 Equipment Photographs Model : 32-1257 (Internal) FCC ID: AAO3201257T INTERTEK TESTING SERVICE Report no.: 0505526 Equipment Photographs Model : 32-1257 (Internal) FCC ID: AAO3201257T INTERTEK TESTING SERVICE Report no.: 0505526 Equipment Photographs Model : 32-1257 (Internal) FCC ID: AAO3201257T INTERTEK TESTING SERVICE Report no.: 0505526 FCC ID: AAO3201257T Equipment Photographs Model : 32-1257 (Internal)

Circuit Description Theory of Operations Circuit Description Transmitter: 1. Audio Amplifier and Compressor Audio signal from condenser MIC is amplified by Q9. Compressor IC U1(GL6552D) will increase the dynamic range of the input audio signal . Adjust VR2 to control the Modulation Deviation. 2. Power Indicator VR1 Q6 Q7 Q8 and D3 for control the Power LED, the LED will OFF if the battery voltage is low. 3. Switch Control SW2 is used to select the status such as: OFF/STANDBY/TALK, SW1 for the momentarily MUTE. 4. RF Oscillator and Amplifier RF oscillator is composed of Q1 X1 L2 D1 and D2 etc. It generates the LO of the transmitter and it can be modulated by the audio signal. Q2 is buffer amplifier. The filter further reduce those unwanted harmonic signal. Q3 Q4 is the RF power amplifier for the transmitter. FCC ID: AAO3201257T

Tuning Procedure for 32-1257 TX Section 1.1 Frequency Accuracy Adjustment 1.1.1 Solder the opened end of the BNC cable to “Mic- “ and ground of the board by using the soldering iron. Then connect the BNC terminal to the Spectrum analyzer 1.1.2 Turn on the DC power and set the SW2 (Off/Standby/Talk) to Standby mode 1.1.3 Set the Spectrum Analyzer to: Desired Frequency :F0 (169.505MHz, 170.245MHz or 171.905MHz) Span : 50KHz BW: 1KHz 1.1.4 Adjust L2 until the carrier Frequency is within our desired. 1.2 Mike Sensitivity Tuning 1.2.1 Solder the opened end of the BNC cable to “Mic- “ and ground of the board by using the soldering iron. Then connect the BNC terminal to the Tester HP8920 1.2.2 Turn on the DC power and set the SW2 (Off/Standby/Talk) to Talk mode 1.2.3 Set the AF level to 2mV 1.2.4 Set the Tester HP8920 to following settings: TX mode Filter: 300Hz—3000Hz Emphasis: On 1.2.5 Adjust the VR2 until 7KHz deviation is read . FCC ID: AAO3201257T 1

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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 May 06, 2005 Tandy Electronics (China) Ltd. 6/F. & 7/F., M. C. Plaza, 9th Sub-District, Lian Tang Ind. Estate, Shenzhen, Guangdong, China. Dear Mr. Alex Lui, Enclosed you will find your file copy of a Part 90 report (FCC ID: AAO3201257T). 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 Enclosure • 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 Tandy Electronics (China) Ltd. Application For Certification (FCC ID: AAO3201257T) Wireless Microphone 0505526 TC/el May 06, 2005 INTERTEK TESTING SERVICES FCC ID: AAO3201257T 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: Technical Specifications EXHIBIT 9: Equipment Photographs EXHIBIT 10: Product Labelling EXHIBIT 11: Instruction Manual EXHIBIT 12: Tune Up Procedure EXHIBIT 13: Input Current INTERTEK TESTING SERVICES FCC ID: AAO3201257T ii MEASUREMENT/TECHNICAL REPORT Application : Tandy Electronics (China) Ltd. Trade Name/Model No. : 32-1257 Date : May 06, 2005 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: 852-2173-8491 Fax: 852-2371-0914 INTERTEK TESTING SERVICES FCC ID: AAO3201257T iii TABLE OF CONTENTS 1.0 General Description ................................................................................................ 2 1.1 Product Description ............................................................................................ 2 1.2 Related Submittal(s) Grants............................................................................... 3 1.3 Test Methodology............................................................................................... 3 1.4 Test Facility ........................................................................................................ 3 2.0 System Test Configuration .................................................................................... 5 2.1 Justification......................................................................................................... 5 2.2 EUT Exercising Software ................................................................................... 6 2.3 Special Accessories ........................................................................................... 6 2.4 Measurement Uncertainly .................................................................................. 6 2.5 Equipment Modification ...................................................................................... 6 3.0 RF Power Output ..................................................................................................... 8 4.0 Modulation Characteristics .................................................................................. 13 4.1 Modulation Frequency Response .................................................................... 14 4.2 Modulation Limiting Characteristics ................................................................. 17 5.0 Occupied Bandwidth ............................................................................................ 21 6.0 Spurious Emission ................................................................................................ 25 6.1 Field Strength of Spurious Radiation ............................................................... 26 7.0 Frequency Stability ............................................................................................... 30 7.1 Frequency Stability – Voltage .......................................................................... 31 7.2 Frequency Stability – Temperature .................................................................. 34 8.0 Technical Specifications ...................................................................................... 38 9.0 Equipment Photographs ...................................................................................... 40 10.0 Product Labelling .................................................................................................. 42 11.0 Instruction Manual ................................................................................................ 44 12.0 Tune Up Procedure............................................................................................... 46 13.0 Input Current..............................................................…

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“mfr” file FCC ID: AAO3201257T Modulation Frequency Response (169.505MHz) 0.00 20.0040.0060.0080.00 100.00120.00 100 600 1100 1600 2100 2600 3100 3600 4100 4600 5100 Modulation Frequency (Hz) Modulation Index FCC ID: AAO3201257T Modulation Frequency Response (171.905MHz) 0.00 20.0040.0060.0080.00 100.00120.00 100 600 1100 1600 2100 2600 3100 3600 4100 4600 5100 Modulation Frequency (Hz) Modulation Index “mlc” file FCC ID: AAO3201257T Modulation Limiting (169.505MHz) 0.01.02.03.04.05.06.07.08.09.0 67 77 87 97 107 117 Modulation Input (dBSPL) Peak Frequency Deviation (kHz) at 500Hzat 1000Hzat 2500Hzat 5000Hz FCC ID: AAO3201257T Modulation Limiting (171.905MHz) 0.01.02.03.04.05.06.07.08.09.0 67 77 87 97 107 117 Modulation Input (dBSPL) Peak Frequency Deviation (kHz) at 500Hzat 1000Hzat 2500Hzat 5000Hz “bw” file

INTERTEK TESTING SERVICE Report No:0505526 Configuration Photographs Worst-Case Radiated Emissions (Front View) Model : 32-1257 Fig.1 FCC ID: AAO3201257T INTERTEK TESTING SERVICE Report No:0505526 FCC ID: AAO3201257T Configuration Photographs Worst-Case Radiated Emissions (Back View) Model : 32-1257 Fig.2