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GLOSSARY
Throw Distance
Tint
Variable Scan
Vertical Frequency The frequency at which images are generated. Vertical frequencies vary amongst sources.
Vertical Offset
Video
Video Decoder
Video Standard
Viewing Angle
White Balance
White Field
YCbCr
YPbPr
YUV
Zoom
The distance between the front feet of the projector and the screen. Also called "Projector-
to-Screen Distance". Always use the correct throw distance formula to calculate the prop-
er throw distance (±5%) required for your lens.
Balance of red-to-green necessary for realistic representation of NTSC signals.
The ability of a projector to synchronize to inputs with frequencies within a specified
range.
Also called vertical scan rate.
The difference between the center of the projected image and the center of the projector
lens. For this projector, this value is expressed as the maximum percentage of the image
that can be projected above or below the lens center without degrading the image quality.
Vertical offset ranges depend on the type of lens in use, and whether or not the image is
offset horizontally at the same time.
The signal that is used by display devices (such as projectors) to generate an image. This
term also refers to the output of video tape/disk players and computers.
An optional device that converts NTSC 3.58, NTSC 4.4, PAL, PAL-N, PAL-M or SECAM
to RGB video.
A specific type of video signal, such as NTSC, PAL, SECAM. This projector can auto-
matically recognize and interpret the incoming standard and display accordingly.
Screens do not reflect equally in all directions. Most light is reflected in a conical volume
centered around the "line of best viewing". Maximum brightness is perceived if you are
within the viewing cone defined by the horizontal and vertical viewing angles.
The color temperature of white used by the projector.
The area of an image that is white only. For example, a full white field is an image that is
white everywhere. A 10% white field is a white area (usually rectangular) that occupies
10% of the image; the remaining 90% is black.
A high-end digital component video signal.
A high-end analog component video signal. Sometimes called YUV, Component, or Y, R-
Y, B-Y, the YPbPr signal by-passes the video decoder in this projector.
See YPbPr.
The adjustment of image size by means of a zoom lens.
A-6
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