Toshiba IR Test Apparatus Project

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Toshiba IR Test Apparatus Project

• Ahmad Nazri Fadzal
• Zamir Izam
• Nurfazlina Kamaruddin
• Wan Othman

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Signal Flow from TV to Devices
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Signal Flow (Cont.)

• Modulation
• Electric signal is modulated with a carrier
  signal
• Carrier signal has frequency of 36-40 kHz
• LED
• Emit IR signal
• Photodiode
• Act as a sensor
• Detect any infrared signal
• Convert IR signal back to electric signal

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Signal Flow (Cont.)

• Filter
• Reject interference signals
• Bandpass filter with center frequency of 38 kHz
  2 kHz
• Demodulation
• Reject carrier signal

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Test Model
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Schedule
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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.

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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.

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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

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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.

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What We are Going to Do

• Familiarized with the TV
• Research on C program codes
• Design software layout