PEQ724690303433MHz Receiver

Block Diagram of 7246/7346 ( Rx ) Power Control Frequency System Frequency System Frequency System Frequency 433.92MHz (i) L.O. : 432.12 (ii) 32.768kHz (iii) 32.768kHz (iii) Raw Data (i) The Frequency is the frequency that the antenna received (ii) The LO is 432.12MHz (iii) The frequency is the clock of the MCU for normal operation. RF Circuit IC: RX3310A MCU IC: TM8712 LCD MCU IC: S1C60L01 Key Matrix Key Matrix Back light Page 1January 2003 RX3310A UHF ASK Receiver HiMARK Technology, Inc. reserves the right to change the product described in this datasheet. All information contained in this datasheet is subject to change without prior notice. HiMARK Technology, Inc. assumes no responsibility for the use of any circuits shown in this datasheet. Description The RX3310A is a fully integrated, amplitude-shift-keying (ASK) modulation, single chip receiver. It is designed to operate in a variety of low power radio applications. All popular radio frequencies from 250 MHz to 450 MHz may be supported by simply choosing the appropriate external components. Particular emphasis has been placed on low current con- sumption. Features ‹Wide frequency range: 250 MHz to 450 MHz ‹High sensitivity ‹Low power consumption ‹Automotive temperature range ‹High integration level requiring few and inexpensive external components ‹SOP 18L package or SSOP 20L (150 mil) package Applications ‹Remote control systems ‹Car alarm and other security systems ‹Baby finder, wireless doorbell, wireless toys Block Diagram RF AMP MIXER OSC IF FILTER COMPARATOR IF AMP BUFFER LIMITER BANDGAP REFERENCE FO OSC1OSC2 CPA CPBCPO VSSDATADISABLE VCCVEEVIRF VCCLINCPC LFB VORF MIXIN

Test Setup Model: 7246 FCC ID : PEQ724690303 External Photo - front External Photo - rear Test Setup Model: 7346 FCC ID : PEQ724690303 External Photo - front External Photo - rear

Test Setup FCC ID : PEQ724690303 Internal Photo - 1 Internal Photo - 2 Test Setup FCC ID : PEQ724690303 Internal Photo - 3 Internal Photo - 4 Test Setup FCC ID : PEQ724690303 Internal Photo - 5 Internal Photo - 6 Test Setup FCC ID : PEQ724690303 Internal Photo - 7 Internal Photo - 8

Technical Description of the Circuit: The product can divide into two part, RF and Baseband, the RF circuit is a single conversion, super-heterodyne architecture receiver IC. The incoming RF signal received by the antenna is fed to the RF input terminal of the IC RX3310A, then the RF signal is then amplified by the LNA in the IC RX3310A. The amplified signal will fed to the mixer input, the LO for the mixer is generated by the external LC tank circuit, in the above circuit, the LO is 432.12MHz, the IF ( F RF -F LO ) is then demodulated by the demodulator in the IC RX3310A and the IC RX 3310A provide the raw data. The data is then fed to the baseband MCU TM8712 for decoding and the MCU TM8712 will display the decoded temperature at the LCD. But the TM8712 does not incorporate the clock function, so we add a clock function only MCU - S1C60L01 into the unit, there is not interconnection between the two MCU and they just work individually. Technical Description (Continued) Part No. Function Q1, Q2, Q4 Power Control Q5 Control Buzzer Q6 Control LED D6 Q1 on RF circuit Data flow

E • 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) 2371 0521 Electronics Tomorrow Ltd. Application For Certification (FCC ID: PEQ724690303) Superheterodyne Receiver 0303623 DL/Sandy July 9, 2003 INTERTEK TESTING SERVICES FCC ID: PEQ724690303 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: PEQ724690303 ii MEASUREMENT/TECHNICAL REPORT Electronics Tomorrow Ltd. - MODEL: 7246 7346 FCC ID: PEQ724690303 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 [08-20-02 Edition] provision. Report prepared by: Derek Leung Intertek Testing Services Hong Kong Ltd. 2/F., Garment Centre, 576, Castle Peak Road, Kowloon, Hong Kong. Phone: 852-2173-8504 Fax: 852-2371-0521 INTERTEK TESTING SERVICES FCC ID: PEQ724690303 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 3.2 Radiated Emission Configuration Photograph................................................................10 3.3 Radiated Emission Data.................................................................................................11 4.0 Equipment Photographs ..............................................................................................14 5.0 Product Labelling........................................................................................................16 6.0 Technical Specifications ..............................................................................................18 7.0 Instruction Manual......................................................................................................20 8.0 Miscellaneous Information..........................................................................................22 8.1 Discussion of Pulse Desensitization...............................................................................23 8.2 Calculation of Average Factor.......................................................................................24 8.3 Emissions Test Procedures.............................................................................................25 INTERTEK TESTING SERVICES FCC ID: PEQ724690303 iv List of attached file Exhibit type File Description filename Test Report Test Report report.pdf Operation Description Technical Description descri.pdf Test Setup Photo Radiated Emission radiated photos.doc External Photo External Photo external photos.doc Internal Photo Internal Photo internal photos.doc Block Diagram Block Diagram block.pdf Schematics Circuit Diagram circuit.pdf ID Label/Location Label Artwork and Location label.pdf User Manual User Manual manual.pdf INTERTEK TESTING SERVICES FCC ID: PEQ724690303 1 EXHIBIT 1 GENERAL DESCRIPTION INTERTEK TESTING SERVICES FCC ID: PEQ724690303 2 1.0 General Description 1.1 Product Description The Equipment Under Test (EUT) is a Receiver operating at 433.92MHz. The EUT is powered by 3.0V d.c. (2 x 1.5V “AA” size batteries). Once batteries are placed in the EUT, it can receive the temperature sign…

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Test Setup FCC ID : PEQ724690303 Radiated -front Radiated - rear