Data Translation DT3153, Руководство пользователя

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Chapter 2
22
removed from the passthru window client area, Windows
automatically restores the correct underlying image data.
A bitmap passthru operation continues until you stop it. You can stop
an asynchronous bitmap passthru operation using software. To stop a
synchronous bitmap passthru operation, click the mouse or press a
key.
Note: No image data is saved to nonvolatile system memory when
a passthru operation is stopped. To save an image, you must
perform an acquisition (see
page 24 ).
Source Origin
The source origin of an image is the upper left corner of the image.
Using software, you can change the source origin of an image to pan
and scroll the image during a passthru operation.
The new source origin is a pixel position somewhere in the image.
Values for the horizontal direction, range from 0 (the default) to 636
for 60 Hz or 764 for 50 Hz. Values for the vertical direction, range
from 0 (the default) to 479 for 60 Hz or 575 for 50 Hz.
When set, the pixel position becomes the upper left corner of the
window. The passthru image shifts to the new position.