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 reduced.  
PAL (Phase Alternating Line) video is a 50 Hz standard with 768 x 576 resolution. It 
is found on some video tape and disk players (used primarily in Europe, China and 
some South American and African countries). 
The smallest discernible element of data from a computer-generated image. 
The phase of the pixel sampling clock relative to incoming data. 
The frequency of the pixel sampling clock, indicated by the number of pixels per 
line. 
The projector is at presentation level when an image from a source is displayed 
without the presence of a slidebar, menu, pull-down list, or error message.  
The distance between the projector’s front feet centers and the screen. Also called 
“Throw Distance”. 
The type of code format called “A” or “B” utilized by the remote keypad(s). The 
default protocol set at manufacture is Protocol “A”. By using two different keypad 
protocols, adjacent projectors can be controlled independently with their remote IR 
keypads. 
A selectable menu item that unfolds into a list of options pertaining to it. 
A manufacturer of a digital video recorder/player/server, QuBit, frequently used for 
providing digital cinema data. QuVis image compression uses a proprietary 
technology called Quality Priority Encoding, based on wavelets, in which the user 
selects a quality level based on signal-to-noise ratio. The data rate varies to 
efficiently maintain that quality level. Frames are coded individually. 
A translucent panel for screen projection. Incident light travels through the incident 
surface of a rear screen and forms an image on the other surface. 
The ability to manipulate through software commands the physical size, placement 
and/or aspect ratio of an image. 
The maximum number of alternate white and black horizontal lines that can be 
distinguished on a screen when a photographic target is placed between the lens and a 
light source and illuminated by that source. 
The maximum number of pixels that the projector can display horizontally and 
vertically across an image, such as 1024 x 768 (called XGA). 
The minimum time required for a CRT projector to move the position of the scanning 
spot from the right edge to the left edge.   NTSC Video '
 Optical Screen '
 PAL Video '
 Pixel '
 Pixel Phase '
 Pixel Tracking '
 Presentation Level '
 Projector-to-Screen '
 Distance 
 Protocol 
'
 Pull-down List '
 QuVis '
 Rear Screen '
 Resizing '
 Resolution (lens) '
 Resolution (projector) '
 Retrace Time '
 (Horizontal)  
						

							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 Industries Association (EIA). Also called serial communication. 
A less common asynchronous data transmission standard in which balanced 
differential voltage is specified. RS422 is especially suited to long distances. 
The output from certain video tape players and video equipment. S-Video separates 
sync and luminance from color information, typically producing a higher quality 
display than composite video. 
The horizontal or vertical frequency at which images are generated. Also known as 
scan rate or refresh rate. 
One horizontal line on the display. 
The horizontal or vertical frequency at which images are generated. 
A video output format of some video tape and disk players (used primarily in 
France). SECAM (Sequential Couleur á Mémoire) signals are similar in resolution 
and frequency to PAL signals. The primary difference between the two standards is 
in the way color information is encoded. 
A slidebar is a graphical display of an adjustable setting. The numerical setting often 
represents a percentage but can be a specific unit such as degrees Kelvin. 
The device, such as a computer or VCR, connected to the projector for display. A 
source may have numerous corresponding channels defined and recognized by the 
projector. See Input. 
See Channel. 
A signal selector that can be connected to a projector for the purpose of adding more 
sources. 
This term refers to the part of the video signal that is used to stabilize the picture. 
Sync can occur in three forms: 
1) “Composite sync”:  the horizontal and vertical components are together on one cable. 
2) “Sync-on-green”:  the sync is part of the green video. 
3) “Separate sync” or “H.SYNC and V.SYNC”:  the horizontal and vertical components 
of the sync are on two separate cables. 
The duration of each sync pulse generated by a computer. The sync width is part of 
the blanking time. 
A type of RGB video with digital characteristics.   Rise Time 
'
 RGB Video '
 RS232 '
 RS422 '
 S-Video '
 Scan Frequency '
 Scan Line '
 Scan Rate '
 SECAM '
 Slidebar '
 Source '
 Source Setup '
 Switcher '
 Sync '
 Sync Width '
 TTL Video ' 
						

							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 differentiate lenses. 
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. 
The frequency at which images are generated. Vertical frequencies vary amongst 
sources. 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 
automatically 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. 
 
   Terminated '
 Throw Distance '
 Throw Ratio '
 Tint '
 Variable Scan '
 Vertical Frequency '
 Vertical Offset '
 Video '
 Video Decoder '
 Video Standard '
 Viewing Angle '
 White Balance '
 White Field '
 YCbCr '
 YPbPr '
 YUV '
 Zoom ' 
						

							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 you 
require by using the appropriate formula as found in this appendix. 
Throw distance is the distance between the projector front feet and the screen (Figure D-1). 
This measurement is not necessarily parallel to the floor—i.e., the projector and screen may 
both be inclined. 
NOTE: If your projector is tilted up or down in relation to the screen, typical in 
large venues or elevated installations, throw distance still represents the smallest 
measurement between the screen and front feet center axes.  
						

							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