| Appendix A: Glossary |
Vertical Frequency | f The frequency at which images are generated. Vertical frequencies vary amongst |
| sources. Also called vertical scan rate. |
Vertical Offset | f The difference between the center of the projected image and the center of the |
| projector lens. For clarity, offset is often expressed as the maximum amount 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. |
Video | f 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. |
Video Decoder | f An optional device that converts NTSC 3.58, NTSC 4.4, PAL, |
| SECAM to RGB video. |
Video Standard | f A specific type of video signal, such as NTSC, PAL, SECAM. This projector can |
| automatically recognize and interpret the incoming standard and display accordingly. |
Viewing Angle | f 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. |
White Balance | f The color temperature of white used by the projector. |
White Boost | f White Boost is an option that enables the recapture of some of the lost light from the |
| transition between each segment in the color wheel. |
White Field | f 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. |
YCbCr | f A |
YPbPr | f A |
| Y, |
YUV | f See YPbPr. |
Zoom f The adjustment of image size by means of a zoom lens.
Christie DS+60/DW30/Matrix 3000 User’s Manual
