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Christie Dlv1920 Dx User Manual

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    							Appendix A: Glossary  
    A-4 020-100001-01 Rev. 01 (04/07) 
    A physical connection route for a source signal, described by a two-digit number 
    representing 1) its switcher/projector location and 2) its slot in the switcher/projector. 
    Signal sent from a source device to the projector. 
    A device, such as the Serial Digital Input Module, that accepts an input signal for 
    display by the projector. 
    A method used by video tape players and some computers to double the vertical 
    resolution without increasing the horizontal line rate. If the resulting frame/field rate is 
    too low, the image may flicker depending on the image content. 
    A small push-button device for controlling most projector settings and operation. For 
    more information, refer to 3.3, Using the Keypad. 
    A distortion of the image that occurs when the top and bottom borders of the image 
    are unequal in length. Side borders both slant in or out, producing a “keyhole” shaped 
    image. It is caused when the screen and lens surface are not parallel, or (in “X” 
    models) by poor Keystone adjustment. 
    As the lamp ages, the shape of two anodes may changes from two points to a flattened 
    state. When this occurs, the arc jumps across the gap from varying points. This is seen 
    as image flicker. Turning the Lamp Conditioning feature ON will pulse the lamp and 
    gradually “condition” the two anodes back to two points. Lamp Conditioning may 
    take seconds, minutes or hours to reach full effectiveness. NOTE: Lamp flicker can 
    occur at any time in the lamps life.  The length of time, over which flicker may occur 
    varies considerably and unpredictably. This behavior is inherent in UHP lamps. 
    The reproduction of the horizontal and vertical size of characters and/or shapes over 
    the entire screen. 
    When light from a projector is incident on a screen, the light reflects from the screen 
    such that the angle of reflection equals the angle of incidence. The Line of Best 
    Viewing is along the line of reflection. 
    A Christie software feature where samples of output light from a projector trigger 
    automatic adjustments in the lamp ballast power in order to maintain a constant light 
    output over time. Also known as brightness tracking. 
    The method of feeding a series of high impedance inputs from a single video source 
    with a coaxial transmission line in such a manner that the line is terminated with its 
    characteristic impedance at the last input on the line. 
    The unit of measure for the amount of visible light emitted by a light source. 
    The signal representing the measurable intensity (comparable to brightness) of an 
    electronic image when the image is represented as separate chrominance and 
    luminance. Luminance also expresses the light intensity of a diffuse source as a 
    function of its area; measured in lumens or candles per square foot (one lumen per 
    square foot = one footlambert). SMPTE RP 98 calls for a luminance of 12 to 22 
    footlamberts for theatre screens. See: Footlambert. 
    The amount of visible light per square meter incident on a surface. 
    one lux = one lumen/square meter = 0.093 foot-candles   Input f 
     In
    put Signal f 
     Interface f 
     Interlace f 
     Ke
    ypad f 
     Ke
    ystone f 
     Lam
    p Flicker f 
     Linearit
    y f 
      Line of Best Viewin
    g f 
     LiteLOC
    ™   f 
     Loopthrough f 
     (Loo
    pthru) 
     Lumen f 
     Luminance f 
     Lux f  
    						
    							 Appendix A: Glossary 
    020-100001-01 Rev. 01 (04/07) A-5 
    A list of selectable options displayed on the screen. 
    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 slide bar, 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).   Menu f 
     NTSC Video f 
     O
    ptical Screen f 
     PAL Video f 
     Pixel f 
     Pixel Phase f 
     Pixel Trackin
    g f 
     Presentation Level f 
     Pro
    jector-to-Screen f 
     Protocol f 
     Pull-down List f 
     QuVis f 
     Rear Screen f 
     Resizin
    g f 
     Resolution (lens) f 
     Resolution (
    projector) f  
    						
    							Appendix A: Glossary  
    A-6 020-100001-01 Rev. 01 (04/07) 
    The minimum time required for a CRT projector to move the position of the scanning 
    spot from the right edge to the left edge. 
    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 
    three, four, or five 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. RS-422 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 slide bar 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.   Retrace Time f 
     (Horizontal) 
     Rise Time f 
     RGB Video f 
     RS-232 f 
     RS-422 f 
     S-Video f 
     Scan Fre
    quency f 
     Scan Line f 
     Scan Rate f 
     SECAM f 
     Slide ba
    r f 
     Source f 
     Source Setu
    p f 
     Switche
    r f 
     S
    ync f  
    						
    							 Appendix A: Glossary 
    020-100001-01 Rev. 01 (04/07) A-7 
    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. 
    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 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. 
    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.   Sync Width f 
     TTL Video f 
     Terminated f 
     Throw Distance f 
     Throw Ratio f 
     Tint f 
     Variable Scan f 
     Vertical Fre
    quency f 
     Vertical Offset f 
     Video f 
     Video Decode
    r f 
     Video Standard f 
     Viewin
    g Angle f 
     White Balance f 
     White Field f 
     YcbC
    r f 
     YPbP
    r f 
     YU
    V f 
     Zoom f  
    						
    							Appendix B 
    Keypad Reference 
     
    020-100001-01 Rev. 01 (04/07)  B-1 
    NOTE: The IR remote is a standard component provided with the projector. Use the 
    extension cable also provided to convert the IR remote to a wired remote, if desired.  
    Refer to Section 3 for a specific description of each key and how to use them 
    correctly. 
     
    * Toggle keys, which require you to either, press and hold, or press twice or press and 
    use the up/down arrow key.  
    						
    							Appendix C 
    Serial Communication 
    Cables 
     
    020-100001-01 Rev. 01 (04/07) 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 nine-wire RS232 serial cable to the 
    RS232 IN port. Or, for long-distance 
    (>100 ft.) links with an RS422-compatible PC or controller, connect RS422 cable to 
    the 
    RS422 port. 
     
     
     
      
    						
    							Appendix D 
    Throw Distance 
     
    020-100001-01 Rev. 01 (04/07) D-1 
    Calculating Throw Distance 
    It is important throw distance be 
    precisely calculated for your 
    installation using the appropriate 
    formula from the chart below. To 
    calculate throw distance you must 
    know the screen size and the lens 
    type installed in the projector. In 
    general, the larger you want the 
    image to be the greater the distance 
    you must allow between the lens and 
    the screen. 
    NOTES: 1) Throw distance is measured from the screen to the center of the 
    projector’s front feet. 2) This measurement is not necessarily parallel to the floor as 
    the projector and screen may be inclined. 3) Due to lens manufacturing, throw 
    distance calculations have a tolerance of 
    ± 5%. 
    Table A-1 Throw Distance Formulas 
    Screen Diagonal Inches (cm) Screen Width Inches (cm) Lens Throw Ratio Throw Distance Formula Inches (cm) 
    Min. Max. Min. Max. 0.73 SX+ 
    0.762 x screen width + 2.65 (6.73) 73.75 (187.3)  215 (543.1)  59.1 (150)  172 (437) 
    1.2:1 (short throw) SX+ 
    1.2865 x screen width + 3.94 (10.01) 59 (149.86)  147.5 (374.65)  47.2 (120)  118 (300) 
    1.2:1 (long throw) SX+ 
    1.2521 x screen width + 4.259 (10.818) 147.5 (374.65)  737.5 (1873.25)  118 (300)  590 (1499) 
    1.45-1.8 SX+ 
    Min. 1.4789 x screen width – 1.42 (3.607) 
    Max.  1.8655 x screen width – 3.23 (8.204) 78.75 (199.39) 
    62.5 (158.75) 542.5 (1377.95) 
    437.5 (1111.25) 63 (160) 
    50 (127) 434 (1103) 
    350 (889) 
    1.8-2.5 SX+ 
    Min. 2.0424 x screen width – 29.19 (74.143) 
    Max. 2.6076 x screen width – 6.55 (16.637) 78.75 (200.02) 
    57.5 (146.05) 546.25 (1387.5) 
    393.75 (1000.1) 63(161) 
    46 (116) 437 (1111) 
    315 (800) 
    2.5-4.5 SX+ 
    Min. 2.6347 x screen width – 4.50 (11.43) 
    Max. 4.783 x screen width – 11.65 (29.591) 120 (304.8) 
    67.5 (171.45) 550 (1397) 
    546.25 (1387.5) 96 (244) 
    54 (136) 440 (1120) 
    437 (1111) 
    4.5-7.3 SX+ 
    Min. 4.5126 x screen width – 2.58 (6.553) 
    Max. 7.423 x screen width – 9.92 (25.197) 131.25 (333.38) 
    81.25 (206.38) 546.25 (1387.5) 
    538.75 (1368.4) 105 (267) 
    65 (164) 437 (1111) 
    431 (1096) 
    0.67 HD 
    0.7058 x screen width + 2.23 (5.664) 73.75 (187.3)  215 (543.1)  59 (150)  172 (438) 
    1.1:1 FP HD 
    1.194 x screen width + 2.67 (6.782) 59 (149.86)  147.5 (374.65)  47.2 (120)  118 (300) 
    1.1:1 RP HD 
    1.1447 x screen width + 3.76 (9.550) 147.5 (374.65)  737.5 (1873.25)  118 (300)  590 (1500) 
    1.38 – 1.84 HD 
    Min. 1.3834 x screen width + 1.79 (4.547) 
    Max. 1.8835 x screen width + 1.44 (3.658) 78.75 (199.39) 
    62.5 (158.75) 542.5 (1377.95) 
    437.5 (1111.25) 63 (159) 
    50 (127) 434 (1103) 
    350 (889) 
    1.84 – 2.58 HD 
    Min. 1.8971 x screen width – 3.95 (10.033) 
    Max. 2.5974 x screen width – 3.64 (9.246) 78.75 (200.02) 
    57.5 (146.05) 546.25 (1387.5) 
    393.75 (1000.1) 63 (161) 
    46 (116) 437 (1111) 
    315 (800) 
    2.58 – 4.15 HD 
    Min. 2.4591 x screen width +11.33 (28.778) 
    Max. 4.112 x screen width + 9.0389 (22.962) 120 (304.8) 
    67.5 (171.45) 550 (1397) 
    546.25 (1387.5) 96 (244) 
    54 (136) 440 (1120) 
    437 (1111) 
    4.15 – 6.74 HD 
    Min. 4.0813 x screen width + 10.664 (27.0256) 
    Max. 6.8869 x screen width + 10.695 (27.178) 131.25 (333.38) 
    81.25 (206.38) 546.25 (1387.5) 
    538.75 (1368.4) 105 (267) 
    65 (164) 437 (1111) 
    431 (1096) 
    NOTES: Calculations are not shown for 1.2:1 lenses. TD = projector distance from the screen to the center of the projector’s front feet W = 
    screen (image) width. 
     
      
    						
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