
Glossary
| An image signal that has the luminance (Y) |
| information separated from chrominance (C) |
| information. |
Saturated Color | 1) A color as far from white, black or gray as it |
| can be (i.e., vermilion rather than pink). 2) A |
| display misadjustment that results in unnaturally |
| bright colors. |
Scan | To scan, is to move across the image frame, one |
| line at a time, either to detect the image, as in an |
| analog or digital camera, or to refresh a CRT- |
| based display. |
Scan Line | One horizontal line in a graphics frame. |
Scan Rate | The frequency or times per second one line is |
| scanned across an image display device such as a |
| CRT. |
Synchronization | Also called “sync” for short. Pulses that time the |
| display of image information to the horizontal and |
| vertical CRT deflection. Signals included with the |
| source input that control the monitor's scan |
| circuits to properly time the lines and frames of a |
| picture. |
Source input | The source of image and sync signals being input |
| into the projector. Typical source inputs are: |
| Computers, VCRs, Image generators, Satellite |
| feed. |
Technician Remote | Remote control used during Model 250 setup and |
| adjustment. Alternative to Standard Remote. |
| Provides access to many of the setup functions by |
| direct keys instead of by menu maneuvering. |
Throw Distance | Distance from the projector to the screen. |
Underscan | Decrease raster size horizontally and vertically so |
| that all four edges of the picture are visible on the |
| display. |
Vertical Height Pots | Potentiometers located on the Horizontal/Vertical |
| Deflection PCB. Used to adjust vertical height. |
Vertical Resolution | The amount of detail that can be perceived in the |
| vertical direction. The maximum number of |
Model 250 Service Manual |