Toshiba IR Test Apparatus Project Ahmad Nazri Fadzal Zamir Izam Nurfazlina Kamaruddin Wan Othman.

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Presentation transcript:

Toshiba IR Test Apparatus Project Ahmad Nazri Fadzal Zamir Izam Nurfazlina Kamaruddin Wan Othman

Signal Flow from TV to Devices

Signal Flow (Cont.)  Modulation Electric signal is modulated with a carrier signal Carrier signal has frequency of kHz  LED Emit IR signal  Photodiode Act as a sensor Detect any infrared signal Convert IR signal back to electric signal

Signal Flow (Cont.)  Filter Reject interference signals Bandpass filter with center frequency of 38 kHz ± 2 kHz  Demodulation Reject carrier signal

Test Model

Schedule

Specification  National Instruments Data Acquisition Device Model: NI PCI-6533 (DIO-32HS) High Speed Pattern I/O and Handshaking  20 MHz maximum transfer rate  32 digital input output lines  8, 16 or 32 bits transfers  Start and Stop triggering, pattern and change detection  32 MB onboard memory per data path  NI-DAQ driver included This device will convert analog signal to digital patterns signal.

Specification (Cont.)  Computer Operating System: Windows 2000/NT/XP RAM: 128 MB RAM 4x CD-ROM drive 1 GB free hard disk space 500 MHz Intel Pentium III  Software Receive signals as inputs, and analysis of the signals as output C++ language based software to analyze and test the output signals The software has user-friendly interface.

Specification (Cont.)  Creating Database The output signals from the television will be analyzed and their characteristics will be stored in a reasonably compact manner.  Sample at least 4 different brand of DVD and VCR signals Operator will designate a 'name' for each particular signal. A database of known signal will be created.  Search capability to access signal database

Specification (Cont.)  Testing Mode Program will instruct user to drive the TV using remote control The program will analyze the signals and compare them with signals from database. The program then will log pass/fail result to user interface and text file. The program will also display the statistics of the test signal comparing with the known signal in the database.  Signal length  Position where errors occur  Type of error  Display statistic in table Graphical display of expected versus failed infrared signal pulse train.

What We are Going to Do  Familiarized with the TV  Research on C++ program codes  Design software layout