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Duplex scanning -- one-pass or two?

With respect to duplex scanning, what is the difference between one-pass and two-pass?

Example of context:
"This indicates whether the scanner supports duplex. If so, it further indicates whether one-pass or two-pass duplex is supported."


Thank you
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InteractiveMind
Asked:
InteractiveMind
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1 Solution
 
CallandorCommented:
One-pass duplex scanning scans both sides of an original in a single pass, resulting in less wear to the original and perhaps being faster.  Two-pass scanners may be cheaper, since they only have one scanning head.
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InteractiveMindAuthor Commented:
Thank you, Callandor :)

I suppose the names seem somewhat self-explanatory now lol
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Smacky311Commented:
First off, duplex scanning means it can scan both sides of a two sided document.

One-pass duplex scanning means two imaging units are built into the scanner (one above other below) so you can scan a 2 page document with only 1 pass of the scanner.
Two-pass duplex means your scanner will scan the front of the document...then it has to run another seperate scan for the other side of the document.

So one-pass is theoretically twice as fast as two-pass duplex scanning.
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InteractiveMindAuthor Commented:
Thanks all the same, Smacky311 :)
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