Christie Digital Systems Ds+5k, Kc-8k, Dw3k-6k, Kc, Hd5k, Kc-8k, Kc, Mirage S+2-4-8k, Dlv1400-dx, 1920-dx, Matrix S+2k, 4000, Hd4k Users Manual

							  Section 2: Installation and Setup 
013-100199-04  2-3. 
 
Proper installation of your projector will ensure the quality of your display. Whether 
you are installing a projector temporarily or permanently you should take the 
following into account to ensure your projector performs optimally. 
Choose the installation type that best suits your needs: front or rear screen, floor 
mount or inverted mount. 
Front Screen, Floor Mount Installation 
ADVANTAGES CONSIDERATIONS 
• Easy to set up 
• Can be moved or changed quickly 
• Easy to access • Shares floor space with audience 
Front Screen, Inverted Mount (ceiling) Installation 
ADVANTAGES CONSIDERATIONS 
• Does not take up audience space 
• Projector is unobtrusive 
• Projector cannot be accidentally moved • Installation is more permanent 
• It is more difficult to access the projector 
Rear Screen, Floor Mount Installation 
ADVANTAGES CONSIDERATIONS 
• Projector is completely hidden 
• Projector is easily accessed 
• Usually good ambient light rejection • Requires separate room 
• Installation cost is usually higher 
Rear Screen, Inverted Mount (ceiling) Installation 
ADVANTAGES CONSIDERATIONS 
• Projector is completely hidden 
• Usually good ambient light rejection • Requires separate room 
• Installation cost is usually higher 
Rear Screen, Floor Mount with Mirror 
ADVANTAGES CONSIDERATIONS 
• Projector is completely hidden 
• Usually good ambient light rejection 
• Requires less space behind screen than other 
rear screen installations • Requires separate room 
• Installation cost is usually higher 
 
Front Screen Installations 
In front screen installations the projector and audience are positioned in front of the 
screen, which can be flat or curved. 
Flat screens are most recommended with this projector. They offer a gain of about one 
with a viewing angle just less than 180°. This type of screen reflects incident light 
equally in all directions so the audience can see the display from various angles.  
Curved screens have a gain greater than one with a viewing angle much less than 
180°. This type of screen does not reflect incident light equally in all directions 
instead it is concentrated in a viewing cone. The audience sitting within the viewing 
cone area will see a brighter image than those sitting just outside this area.  
2.2   Installation 
Considerations 
 Installation type f 
 Screen T
ype  f  
						

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Rear screen installations 
There are two basic types of rear screens: diffused and optical.  
A diffused screen has a surface, which spreads the light striking it. Purely diffused 
screens have a gain of less than one. The main advantage of the diffused screen is its 
wide viewing angle, similar to that of a flat screen for front screen projection. This 
type of screen is suitable when a wide viewing angle is required but there is low 
ambient room lighting. 
Optical screens take light from the projector and redirect it to increase the light 
intensity at the front of the screen. This reduces it in other areas. A viewing cone, 
similar to that of a curved front screen installation is created. This type of screen is 
better suited for brightly lit rooms where the audience is situated within the viewing 
cone.  
Screen size 
Choose a screen size, which is appropriate for your lens and application. Keep in mind 
that if the projector will be used to display text information, the image size must allow 
the audience to recognize all text clearly. The eye usually sees a letter clearly if eye-
to-text distance is less than 150 times the height of the letter. Small text located too far 
from the eye will likely be illegible at a distance no matter how sharply and clearly it 
is displayed. 
To fill a screen with an image, the aspect ratio of the screen should be equal to the 
aspect ratio of the image (expressed as the ratio of its width to its height). Standard 
video from a VCR has a 4:3 or 1.33:1 aspect ratio. For example, to display a VCR  
						

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output with a 4:3 aspect ratio onto a 10-foot (3m) high screen, the width of the screen 
must be at least 13.3feet (4m). 
The high brightness of this projector is well suited for locations where ambient 
lighting might be considered less than ideal for projection. A typical room with ceiling 
lights and windows rarely requires special attention. Contrast ratio in your images will 
be noticeably reduced only if light directly strikes the screen, such as when a shaft of 
light from a window or floodlight falls on the image. Images may then appear washed 
out and less vibrant.  
In general, avoid or eliminate light sources directed at the screen. 
Other considerations and tips that can help improve your installation: 
• Keep the ambient temperature constant and below 35°C (95°F). Keep the 
projector away from heating and/or air conditioning vents. Changes in 
temperature may cause drifts in the projector circuitry, which may affect 
performance.  
• Keep the projector away from devices, which radiate electromagnetic energy such 
as motors and transformers. Common sources of these include slide projectors, 
speakers, power amplifiers, elevators, etc.  
Choose the best screen size for the application. Since more magnification reduces 
brightness, use a screen size appropriate for the venue but not larger than required. 
Installing a large screen in a small room is similar to watching television at a close 
range; too large a screen can overpower a room and interfere with the overall effect. 
A good rule of thumb is to be no closer than 1.5 times the width of the screen. 
 
Throw distance 
Throw distance is the distance measured from your projector’s front feet to the screen. 
This is an important calculation in any projector installation as it determines whether 
or not you have enough room to install your projector with a desired screen size and if 
your image will be of the right size for your screen.  
You can quickly estimate the throw distance by taking the horizontal width of the 
screen and multiplying it by the lens throw ratio. The result of this calculation tells 
you roughly how far back the projector should be positioned from the screen in order 
to project a focused image large enough to fill the screen.  For example, using a 0.73:1 
lens, throw distance would roughly be 0.73 x screen width. 
IMPORTANT: Once you determine the type of lens and screen size you’re going to 
use, calculate the precise throw distance using the formula or graphs located in 
Appendix D. Due to lens manufacturing tolerances for lens focal length, actual 
throw distance can vary 
±5% between lenses described as having the same throw 
ratio.   Ambient Li
ghting f 
 Other Considerations f 
 
Projector Position and     f 
Mountin
g               
						

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Vertical and horizontal position  
The correct vertical and horizontal position of the projector in relation to the screen 
depends on the lens type and the screen size. Ideally, the projector should be 
positioned perpendicular to the screen. This way, the image will appear rectangular 
instead of keystoned (trapezoidal).  
The vertical position of the image can be offset – that is moved above or below the 
optical axis (lens center) by adjusting the fully motorized lens mount with the keypad. 
The amount of vertical offset available depends directly on the lens installed in the 
projector and can be slightly limited if horizontal offset has been applied. Vertical 
offset can also be expressed as the percent of half the image height OR the number of 
pixels of shift from lens center. Refer to Figure 2.1 for some illustrated examples of 
vertical offset.  
Table 2.1 along with Figure 2.2 show the maximum vertical offset of a lens or 
alternatively, how much of your projected image will appear above or below lens 
center if the maximum vertical offset is applied using that lens.  
Table 2.1. Lens Offsets   
Lens Type Offset Movement 
(All motorized lenses) 
						

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Figure 2.1. Vertical Offset Examples  
						

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Figure 2.2. Lens Vertical Offsets  
						

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The horizontal position of the image can be offset – that is moved to the left or right 
of lens center, by adjusting the fully motorized lens mount through software. The 
amount of horizontal offset available depends on the lens installed and if the image 
has already been vertically offset. Horizontal offset can also be expressed as the 
percent of half the image width – the number of pixels of shift to one side of lens 
center. Refer to Figure 2.3 for some illustrated examples of horizontal offset. 
See also Table 2.1 along with Figure 2.4 which shows the maximum horizontal offset 
of a lens or alternatively, how much of your projected image will appear to one side of 
lens center if the maximum horizontal offset is applied using that lens.  
 
Figure 2.3. Horizontal Offset Examples  
						

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Figure 2.4. Lens Horizontal Offsets 
  
						

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Mounting  
There are several methods for mounting the projector. Depending on your chosen 
installation, one method may be more suitable than another. In typical front and rear 
screen installations the projector can be mounted to a secure and level surface, such as 
a table or cart. Carts are useful when the projector has to be moved during a 
presentation or from site to site. It is recommended you lock the wheels on a cart, 
when it’s in position, to prevent someone from accidentally moving it during a 
presentation. 
CEILING MOUNT - The projector can also be inverted and suspended from the ceiling 
using a specially designed ceiling mount fixture. This type of mounting is 
recommended for fixed installations and for those that want the projector out of plain 
view or have a limited amount of space for projector and audience. For more 
information, contact your dealer. 
 Use only the CHRISTIE approved ceiling mount kit designed for your 
projector. Refer to the installation instructions and safety guidelines 
provided in the kit.
 
SPECIAL MOUNTING – The projector can be rotated (front-to-back) up to 360 degrees 
and mounted without it affecting performance. However, the side-to-side tilt limit of 
the projector must not exceed ±15 degrees. This tilt limit is required to ensure optimal 
performance of the projector.  
 
STACKING – An optional stacking frame is available for all models which allows 
stacking up to a maximum of three projectors in an upright or inverted orientation. 
Refer to the instructions provided in the Stacking Frame kit (104-117101-01) for 
details regarding the assembly. 
 
Adjusting projector height  
You can modify the height of the projector to remedy a slightly uneven mounting 
surface by adjusting the two feet threaded into the bottom chassis. Turn each foot 
clock-wise or counter-clockwise until the project is level on all sides.  
 
Folded Optics 
In rear screen applications where space behind the projector is limited, a mirror may 
be used to fold the optical path. See Figure 2.5. The position of the projector and 
mirror must be accurately set – if considering this type of installation call your dealer 
for assistance. 
 
Figure 2.5. Folded Optical Path 
   
						

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Sources connect to the Input Panel located at the back of the projector. See Figure 2.6. 
The upper right corner (
INPUT 1) typically accepts an RGB signal from an external 
analog RGB source, or it can also be used for YPbPr signals or additional video 
sources. Just beside these BNCs, the DVI-I connector (
INPUT 2) accepts digital or 
analog display signals from a computer. Connect analog composite video at 
INPUT 3 
or S-video at 
INPUT 4 from devices such as VCRs, laser disc players or DVD players.  
There are also several optional interfaces available for connecting other sources—
these interfaces slide into the remaining unused option slot, and can be done while the 
projector is running.  
 
Figure 2.6. Input Panel 
NOTES: 1) See Section 6 – Specifications for details regarding compatible inputs. 2) 
Use high quality shielded cables only for all connections.  
INPUT 1 consists of five BNCs (connectors) for linking to a variety of sources. The 
typical connection would be to an RGB source such as a PC, Mac, DEC, Sun, SGI and 
others. This projector supports multiple sync types with RGB signals: sync-on-green, 
composite sync, and separate H & V syncs. 
NOTE: Depending on your source, you may need a custom adapter cable with BNC 
connectors at the projector end and a different type of connector at the other (such as 
a 15-pin D connector for some computer sources). Contact your dealer for details. 
Connect the 
SYNC BNC input(s) first. Then connect the red, green and blue source 
outputs to the 
RED, GREEN, and BLUE BNCs on the INPUT 1 panel. If the source uses 
sync-on-green, only the red, green, and blue connections are required. If the source 
provides a composite sync output, connect it to the 
SYNC input labeled HOR/COMP. If 
the source provides separate horizontal and vertical sync outputs, connect horizontal 
sync to the 
SYNC input labeled HOR/COMP and connect vertical sync to SYNC input 
labeled 
VERT. See Figure 2.7. 
2.3   Connecting 
Sources 
 RGB Signals  
 f