A document with its long side vertical and its short side horizontal.
See also "Landscape orientation".
Postcard sizeA standard paper size. (100 × 148mm / approximately 3.94 × 5.83inches)
Portrait orientation is used for this scanner.
ResolutionA measure of the fineness of details or grain of images. The customary metric of resolution is dpi (dots per inch). For any given image, the higher the resolution, the more dots or pixels that can be used, and the greater the resulting fineness of detail that can be expressed.
Simplex scan modeA scan mode where only one side of each document sheet is scanned. See also "Duplex scan mode".
Ultrasonic sensorA type of sensor that uses ultrasonic sound waves, in this case to detect document multifeeds by recognizing differences in how the sound penetrates single versus multiple sheets.
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