Introduction
Glossary
Appendix
Glossary
Index
Contents
TOP
161
How to Load
Documents
Scanner
Overview
How to Use the
Operator Panel
Various Ways to
Scan
Daily Care
Troubleshooting
Replacing the
Consumables
Operational
Settings
Threshold
The value which is used to determine whether a certain color is black or white. Threshold value must be configured in order to
scan images with grayscale gradation. Each pixel is converted into black or white according to the specified value.
TWAIN
TWAIN (Technology Without Any Interesting Name) is an API (Application Program Interface) standard for imaging devices
(e.g. scanners, digital cameras) developed by TWAIN Working Group. In order to use devices that comply with this standard,
it is necessary to install a driver software that supports TWAIN standard.
U
Ultrasonic sensor
A sensor that detects multifeed errors by ultrasonic soundwave. It detects multifeeds by monitoring the difference in the
amount of ultrasonic waves transmitted through the documents.
USB
USB (Universal Serial Bus) is a standard for interfaces used to connect devices such as keyboards and scanners. Up to 127
devices can be connected by this interface. It can be connected and disconnected without powering off the devices.
For USB 2.0, the data transfer rate is 1.5 Mbps in Low-Speed, 12 Mbps in Full-Speed, and a maximum of 480 Mbps in Hi-
Speed mode.
For USB 1.1, the data transfer rate is 1.5 Mbps in Low-Speed and 12 Mbps in Full Speed mode.
W
White reference sheet
The white part located inside the ADF that the scanner defines as white, in order to adjust the brightness of all other areas
accordingly.
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