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Appendix
50
Aspect ratio
Width and height ratio of an image. The normal aspect ratio of a computer and video image is 4 : 3. There are also wide images with an
aspect ratio of 16 : 9 and 21 : 9.
ANSI lumen
Brightness unit established by the American National Standards Institute.
Auto sync
Optimises projected computer images by automatically adjusting certain characteristics.
Background
Initial setting image projected when no signal is being input.
Clock
Clock adjustment is used to adjust vertical noise when clock level is incorrect.
Compatibility
Ability to use with various image signal modes.
Composite sync
Signal combining horizontal and vertical sync pulses.
Digital keystone correction
Function to digitally correct a distorted image when the projector is set up at an angle.
Dot by dot mode
Mode that projects images in their native resolution.
Enlarge
Digitally zooms in on a portion of an image.
Fit to screen
Function to adjust an image without keeping a native aspect ratio other than 4 : 3, and project it in a 4 : 3 ratio.
Freeze
Function to freeze a moving image.
GUI
Graphical User Interface. User interface with graphics that allow easier operation.
I/P conversion
Function to convert an image between “Interlaced” and “Progressive” scan displays.
Intelligent compression
High quality resizing of lower and higher resolution images to fit the projector’s native resolution.
IrCOM
Function to transmit still images from a computer, hand-held PC or digital still camera via infrared communication for “Wireless
Presentations”.
IrDA
Standard protocol for wireless communication.
IrTran-P
Standard format (protocol) for transmission of images.
PDF
Portable Document Format. Documentation format used to transfer text and images from the CD-ROM.
Phase
Phase shift is a timing shift between isomorphic signals with the same resolution. When phase level is incorrect, the projected image
typically displays horizontal flicker.
Presentation tools
Helpful tools used to emphasise keypoints throughout a presentation.
RS-232C
Function to control the projector from the computer by using the RS-232C ports on the projector and computer.
Startup image
The image displayed when the projector is turned on.
Status function
Displays the settings of each adjustment item.
Sync
Synchronises the resolution and phase shift of two signals. When receiving an image with a resolution different from that of the computer,
the projected image may be distorted.
Sync on green
Video signal mode of a computer which overlaps horizontal and vertical sync signal to green colour signal pin.
Wireless mouse control
Function to operate the mouse control of the computer with the supplied remote control.
XGA resolution
The resolution with 1,024 ן 768 pixels that uses the signal of an IBM/AT compatible (DOS/V) computer.
Glossary