operational description

FCC ID: TQ4YWGIT-R5678900

Operational Description

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FCCID_601289

System Description 1.System Structure Diagram Diagram1: System Structure diagram The system consists of radio frequency module, Baseband module, power module, data interface and LED display interface. Under the control of Baseband module， radio frequency module transmits the modulated carrier signal with varying frequency and power. The antenna transmits the signal to a certain area within which the tags receive the signal and then feedback its signal. After going into radio frequency module the feedback signal will be demodulated to form Baseband signal. . Baseband module performs decoding the tag signal and communicating with PC, and power module provides all the direct voltage . 2、Radio Frequency Structure Diagram

End Front Comparator Detector Amplifier Amplifier Antenna Base_band Module Phase Six ports Front End Lock coupling Amplifier Amplifier Looper Network ASK Signal Power Power Control Diagram2 radio frequency module diagram The radio frequency module consists of transmitting and receiving parts controlled by Baseband circuit. The Phase Lock Looper generates carrier with frequency range from 902MHz~928MHz, which could be amplified by the Front Amplifier and End Amplifier and then emitted by the antenna that returns tag’s signal via six ports coupling network to the detector, where the signal are detected and amplified to output to the Baseband circuit. 3、Baseband Structure Diagram Radio FPGA MCU Frequency APA075 MCF5272 Module Data LED interface PC or Power Interface +I/O Switcher interface Diagram 3 Baseband module diagram 4、Radio Frequency Module The radio frequency module consists of transmitting and receiving part. 2

Transmitting Part The transmitting part is as below according to the RF signal flow. Temperature-compensated oscillator(12.8MHz) →PLL915A phase lock looper → RF2302 power front-amplifier → end-amplifier(power adjustable) → microwave switcher。(Maximum output power: 30dBm). Receiving part The receiving part is as below according to the returned(feedback) signal flow. six-ports coupling network→ front difference amplifier → end amplifier → comparator output. (Output double-channel digital signal). 5、Baseband Module The Baseband module consists of coding/decoding and control parts, which respectively are FPGA(APA075) and IP2022 MCU. The coding/decoding part employs built-in-FLASH FPGA modeled APA075 produced by Actal Company. The device performs coding/decoding for tag and controlling the transmitting circuit. The control part employs IP2022 produced by Ubicom Company. With 19200bps serial interface and 10Mbps Ethernet network interface, IP2022 performs order analyzing, data uploading, and data storage, etc. 3


Document Created: 2005-10-19 10:52:15
Document Modified: 2005-10-19 10:52:15
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