AAO3201257RReceiver for Wireless 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

Matching circuit LNA SAW FIL (169.5- 172MHz) Matching circuit IF FIL (10.7 MHz) IF Amplifier IF FIL (10.7 MHz) IF DEMOD TA31161 10.7MHz Quadcoil SQ Detect AF_amp LED Indicator Expander GL6552 Pre_Amp Volume Control Mute1 Matching circuit Lo Circuit Freq: 158.805/159.545/ 161.205MH z 9V adapter Polarity Protection 5V Regulator Power Indicator 5V AF RSSI Mute2

INTERTEK TESTING SERVICE Report no.: 0505527 Equipment Photographs Model : 32-1257 (External) FCC ID: AAO3201257R INTERTEK TESTING SERVICE Report no.: 0505527 Equipment Photographs Model : 32-1257 (External) FCC ID: AAO3201257R INTERTEK TESTING SERVICE Report no.: 0505527 FCC ID: AAO3201257R Equipment Photographs Model : 32-1257 (External)

INTERTEK TESTING SERVICE Report no.: 0505527 Equipment Photographs Model : 32-1257 (Internal) FCC ID: AAO3201257R INTERTEK TESTING SERVICE Report no.: 0505527 Equipment Photographs Model : 32-1257 (Internal) FCC ID: AAO3201257R INTERTEK TESTING SERVICE Report no.: 0505527 Equipment Photographs Model : 32-1257 (Internal) FCC ID: AAO3201257R INTERTEK TESTING SERVICE Report no.: 0505527 Equipment Photographs Model : 32-1257 (Internal) FCC ID: AAO3201257R INTERTEK TESTING SERVICE Report no.: 0505527 Equipment Photographs Model : 32-1257 (Internal) FCC ID: AAO3201257R INTERTEK TESTING SERVICE Report no.: 0505527 FCC ID: AAO3201257R Equipment Photographs Model : 32-1257 (Internal)

Circuit Description Theory of Operations Circuit Description Receiver: 1. RF Module Low Noise Amplifier (LNA) consist of the Q1 and Q2, FIL1 for suppression the image frequency. Crystal X1 (using three difference frequency crystal 52.935MHz/53.1817MHz/53.735MHz for three difference channels) and Q5 act as an oscillator and the Lo signal (triple up to the desired LO frequency 158.805MHz/159.545MHz/161.205MHz for three difference channels) will be selected by L9 C40 L8 C36. RF signal from LNA and Lo signal is mixed by Q3, FIL2 Q4 FIL3 act the IF amplifier and filter the unwanted signal .U1(TA31161) is RF demodulation IC, AF and RSSI signal will be output . 2. Power control regulator S1 is Power ON/OFF control switch, Q9 Q7 Q8 and C44 reduce the “POP” noise, Q13 C69 and U3 provide a +5v DC for all circuit, the POWER LED will light when the S1 sets to ON. 3. Mute and Squelch The Mute circuit are controlled by U2-B VR2 and Q15, if the RF signal is weak then the Q5 will short the AF signal to ground. The noise section from the RF MODULE will be selected by U2-A U2-B and amplified by Q12 and rectifying the DC voltage which is filtered by C56 and R47 compare with the voltage of the IC’s Pin 9 from SQUELCH control VR1, if the RF signal is weak then the AF signal will be shorted by Q6 to ground and the indicator SQ-LED will OFF. 4. AF Amplifier and Expander Q14 and Q10 for the AF amplifier, U4 acts the expander to improve the SIGNAL-NOISE-RATIO FCC ID: AAO3201257R

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 15 report (FCC ID: AAO3201257R). 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 FCC ID: AAO3201257R • 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: AAO3201257R) Superheterodyne Receiver WO# 0505527 TC/el May 06, 2005 FCC ID: AAO3201257R INTERTEK TESTING SERVICES FCC ID: AAO3201257R i LIST OF EXHIBITS INTRODUCTION EXHIBIT 1 : General Description EXHIBIT 2: System Test Configuration EXHIBIT 3: Emission Results EXHIBIT 4: Equipment Photographs EXHIBIT 5: Product Labelling EXHIBIT 6: Technical Specifications EXHIBIT 7: Instruction Manual EXHIBIT 8: Miscellaneous Information INTERTEK TESTING SERVICES FCC ID: AAO3201257R ii MEASUREMENT/TECHNICAL REPORT Tandy Electronics (China) Ltd. - MODEL: 32-1257 FCC ID: AAO3201257R This report concerns (check one:) Original Grant X Class II Change _____ Equipment Type: Superheterodyne Receiver (example: computer, printer, modem, etc.) 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. Transition Rules Request per 15.37? Yes No X If no, assumed Part 15, Subpart B for unintentional radiator - the new 47 CFR [12- 08-03 Edition] provision. Report prepared by: Billy Chow Intertek Testing Services Hong Kong Ltd. 2/F., Garment Centre, 576, Castle Peak Road, Kowloon, Hong Kong Phone: 852-2173-8545 Fax: 852-2371-0914 INTERTEK TESTING SERVICES FCC ID: AAO3201257R iii Table of Contents 1.0 General Description.................................................................................................. 2 1.1 Product Description .............................................................................................. 2 1.2 Related Submittal(s) Grants ................................................................................. 2 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...................................................................................... 5 2.3 Special Accessories ............................................................................................. 5 2.4 Equipment Modification ........................................................................................ 6 2.5 Measurement Uncertainty .................................................................................... 6 2.6 Support Equipment List and Description............................................................... 6 3.0 Emission Results ...................................................................................................... 8 3.1 Field Strength Calculation..................................................................................... 9 3.1 Field Strength Calculation (cont’d) ...................................................................... 10 3.2 Radiated Emission Configuration Photograph .................................................... 11 3.3 Radiated Emission Data .................................................................................... 12 3.4 Conducted Emission Configuration Photograph ............................................... 15 3.5 Conducted Emission Data ................................................................................. 17 4.0 Equipment Photographs.............................................................................................. 19 5.0 Product Labelling .......................................................................................................... 21 6.0 Technical Specifications ............................................................................................. 23 7.0 Instruction Manual ........................................................................................................ 25 8.0 Miscellaneous Information .......................................................................................... 27 8.1 Discussion of Pulse Desensitization ....................................................................... 28 8.2 Calculation of Average Factor................................................................................. 29 8.3 Emissions Test Procedures ..........................................…

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Report No.:0505527 Receiving mode 169.505MHz Ctrl No.:NA PAGE 1 Tested By:Hong, Report No.:0505527 Scan Settings (1 Range) |--------- Frequencies -----------||----------- Receiver Settings ------------| Start Stop Step IF BW Detector M-Time Atten Preamp OpRge 150k 30M 5k 10k PK+AV 10ms AUTO LN OFF 60dB Final Measurement: x QP / + AV Meas Time: 1 s Subranges: 16 Acc Margin: 20dB Transducer No. Start Stop Name 21 9k 30M EW0698 0 10 20 30 40 50 60 70 80 90 dBuV 100 0.15 MHz 30 110 F15Q F15A Report No.:0505527 Receiving mode 169.505MHz Ctrl No.:NA Tested By:Hong, Report No.:0505527 Scan Settings (1 Range) |--------- Frequencies -----------||----------- Receiver Settings ------------| Start Stop Step IF BW Detector M-Time Atten Preamp OpRge 150k 30M 5k 10k PK+AV 10ms AUTO LN OFF 60dB Final Measurement Results: no Results Report No.:0505527 Receiving mode 171.905MHz Ctrl No.:NA PAGE 1 Tested By:Hong, Report No.:0505527 Scan Settings (1 Range) |--------- Frequencies -----------||----------- Receiver Settings ------------| Start Stop Step IF BW Detector M-Time Atten Preamp OpRge 150k 30M 5k 10k PK+AV 10ms AUTO LN OFF 60dB Final Measurement: x QP / + AV Meas Time: 1 s Subranges: 16 Acc Margin: 20dB Transducer No. Start Stop Name 21 9k 30M EW0698 0 10 20 30 40 50 60 70 80 90 dBuV 100 0.15 MHz 30 110 F15Q F15A Report No.:0505527 Receiving mode 171.905MHz Ctrl No.:NA Tested By:Hong, Report No.:0505527 Scan Settings (1 Range) |--------- Frequencies -----------||----------- Receiver Settings ------------| Start Stop Step IF BW Detector M-Time Atten Preamp OpRge 150k 30M 5k 10k PK+AV 10ms AUTO LN OFF 60dB Final Measurement Results: no Results

INTERTEK TESTING SERVICE Report No:0505527 Configuration Photographs Worst-Case Radiated Emissions (Front View) Model : 32-1257 Fig.1 FCC ID: AAO3201257R INTERTEK TESTING SERVICE Report No:0505527 FCC ID: AAO3201257R Configuration Photographs Worst-Case Radiated Emissions (Back View) Model : 32-1257 Fig.2

INTERTEK TESTING SERVICE Report No:0505527 Configuration Photographs Worst-Case Line-Conducted Emissions (Front View) Model : 32-1257 FCC ID: AAO3201257R i INTERTEK TESTING SERVICE Report No:0505527 Configuration Photographs Worst-Case Line-Conducted Emissions (Back View) Model : 32-1257 FCC ID: AAO3201257R ii INTERTEK TESTING SERVICE Report No:0505527 Configuration Photographs Worst-Case Line-Conducted Emissions (Side View) Model : 32-1257 FCC ID: AAO3201257R iii