Projector Christie Roadster S+20k User Manual

GLOSSARY 
 
Roadster/Mirage S+ User’s Manual A-5 
A video output format of some video tape and disk players. There are two types of 
NTSC (National Television Standards Committee) video: NTSC 3.58 and NTSC 
4.43. NTSC 3.58 is used primarily in North America and Japan. NTSC 4.43 is less 
commonly used. 
A type of rear-projection screen which re-directs light through the screen to increase 
image brightness in front of the screen. Screen gain is usually greater than 1 but 
audience viewing angles are...

GLOSSARY 
A-6 
Roadster/Mirage S+ User’s Manual 
The time required by the video amplifier of the projector to increase its output from 
10% to 90% of the maximum value. 
The video output (analog or digital) of most computers. Analog RGB video can have 
3, 4, or 5 wires — one each for red, green, and blue, and either none, one or two for 
sync. For three-wire RGB, the green wire usually provides sync. (See TTL Video). 
A common asynchronous data transmission standard recommended by the 
Electronics...

GLOSSARY 
 
Roadster/Mirage S+ User’s Manual A-7 
A wire connecting a single video source to a display device, such as a projector, must 
be terminated by a resistance (usually 75Σ for video). 
The distance between the front feet of the projector and the screen. Also called 
“Projector-to-Screen Distance”. Always use the correct Christie throw distance 
formula to calculate the proper throw distance (±5%) required for your lens. 
Throw ratio = throw distance / screen width. Typically used to...

Appendix B 
Keypad Reference 
 
 Roadster/Mirage S+ User’s Manual B-1 
 
 
Figure B-1. Remote Keypad  

KEYPAD REFERENCE 
B-2 
Roadster/Mirage S+ User’s Manual 
 
Figure B-2. “Brick” Rental Staging Remote (Roadster) 
.  

Appendix C 
Serial Communication Cables 
 
 Roadster/Mirage S+ User’s Manual C-1 
A serial link of RS232 or RS422 enables ASCII communication with the projector so 
that it can be controlled remotely from a PC or other controller. From a PC, connect a 
standard 9-wire RS232 serial cable to the 
RS232 IN port located on the side of the 
projection head. Or, for long-distance (>100 ft.) links with an RS422-compatible PC 
or controller, connect RS422 cable to the 
RS422 port.  
   

SERIAL COMMUNICATION CABLES 
C-2 
Roadster/Mirage S+ User’s Manual 
 
 
 
  

Appendix D 
Throw Distance 
 
 Roadster/Mirage S+ User’s Manual D-1 
Always consult this Appendix when planning a projector installation. See also 2.3, Projector Position and Mounting. 
Calculating Throw Distance 
 
Figure D-1. Calculating Throw Distance 
Correct throw distance depends on the screen size and lens present—the larger the image 
needed, the greater the distance you must allow between the lens and screen. Once you 
know the screen size and lens type present, you can calculate the precise...

THROW DISTANCE 
D-2 
Roadster/Mirage S+ User’s Manual 
Figure D-1 provides the recommended throw distance formulas for each of the 
“Compact” Thunder Lenses. Pre-calculated throw distances for the complete range of 
lens types and screen sizes appear in the charts and graphs on the following pages. 
Refer to these examples to quickly determine the proper throw distance (±5%) for 
your installation and lens. 
Table D-1. Throw Distance Formulas 
Diagonal Screen Size