Data Translation DT3155, Руководство пользователя

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Chapter 1
2
Features
The DT3155 is a high-accuracy, programmable, monochrome frame
grabber board for the PCI bus. It is suitable for both image analysis
and machine vision applications.
The DT3155 accepts video signals in many different monochrome
formats and digitizes the image. The board either stores the digitized
data to the host computer’s system memory or transfers the digitized
data to the computer’s display controller to display images in real
time. The board transfers image data to the host computer using PCI
burst transfers.
Key features of the DT3155 board are summarized as follows:
• Operates on the PCI local bus interface;
• Digitizes 8-bit monochrome video from any one of four 60 Hz or
50 Hz video input channels;
• Synchronizes to any of the video inputs;
• Provides digital video synchronization for reduced pixel jitter
and good VCR/VTR acquisition;
• Accepts an external trigger with selectable polarity;
• Provides a software-selectable chrominance notch filter for 50 Hz
and 60 Hz AC-coupled signals;
• Provides programmable black and white levels;
• Provides a 256 x 8-bit input look-up table (ILUT);
• Provides a 256 x 8-bit passthru look-up table;
• Provides passthru scaling to 1/4 of the frame size; and
• Provides eight TTL-level digital output signals for
general-purpose use.