Glossary
Glossary Of Terms
Amorphous | Without definite form; not crystallized. |
Arc Lamp | The xenon arc lamp in the Model 200 projector. It |
| operates at high temperatures (160° to 200°) and |
| produces dangerously intensive light with |
| hazardous levels of ultraviolet and infrared |
| radiation. |
Aspect Ratio | The ratio of the picture width to picture height. |
| The standard U.S. television aspect ratio is four |
| units wide to three units high (4:3). High Definition |
| Television (HDTV) is 16:9. |
Bandwidth | The transmission or reception capacity of a |
| computer or communications channel measured |
| in bits per second in digital and in Hertz in |
| communications. Bandwidth is the difference |
| between the lowest and highest frequencies |
| transmitted or received. Wider bandwidth |
| provides more information or picture detail |
| capability. |
Chrominance | Abbreviated as "C." Color information signal or |
| signals. |
Cold Mirror | Mirror that absorbs infrared light so that its |
| reflection contains only "cold' light that does not |
| transmit appreciable heat. As a result of this |
| absorption of infrared heat radiation, "cold" |
| mirrors get quite hot. |
CRT (Cathode Ray Tube) | The vacuum tube used as a display screen in |
| video terminals or television sets. Commonly |
| called the picture tube. |
Dichroic Mirrors | The white light of the xenon arc lamp is separated |
| into red, green and blue by means of dichroic |
| mirrors which reflect only one color and pass all |
| others. |
Field | One half of a complete video frame. Odd lines in |
| one field and even lines in another make up one |
| frame. |
Frame | One complete TV picture or screen of |
| information. It is composed of two fields and has |
Model 200 Service Manual |
