Avision AV1860 (DL-1101S/DL-1103S) - Manual (Page 84)

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Cache
Mode: None, Page Number, Memory
Size.
This option allows you to assign a specified
memory size from the available RAM to
process the image data. By specifying a
smaller memory size, you can free more
memory for other applications you are
running. By specifying a larger memory
size, you can have more memory to
process the image data especially when you
have a large amount of documents needed
to be scanned.
You can also specify your memory size by
the page number. For your information, an
A4 color document scanning at 300 dpi
consumes approximates 24MB.
Image Count
When the selected cache mode is “none”,
the image count option allows you to assign
number of pages you need to scan. For
example, if you wish to scan the first two
pages, simply move the page slider to 2,
and the scan action will be stopped when
the scanning of the first two pages have
been completed.