Christie CP2000-X Setup Guide download pdf (Page 17)

Section 2: Installation & Setup

CP2000-X SETUP GUIDE 2-9

020-100059-01 Rev 1. (03/08)

Both depend on the screen size and lens type you are using. Make sure that the

room can accommodate the required location of the projector for the chosen

screen size.

With the projection head secured on a suitable cart, position the unit so that the

front bezel is less than 2 feet from the theatre’s port window wall, or 3 feet if the

Motorized Auxiliary Lens Mount will be added. Center the projector with the

theatre screen (ÅÆ) if possible (see Figure 2.10 A). If forced to be off-center

(such as when a film projector is already present), try to optimize aim as shown

in Figure 2.10 B. This will slightly increase side keystoning, but will minimize

horizontal lens offset required.

NOTE: Unlike film projectors, it is best to keep the projector lens surface as

parallel to the screen as possible, even if it is significantly above the screen

center.

Figure 2.10 Centering ÅÆ(AERIAL VIEWS)

Note that when a particularly short throw distance combines with a very wide

screen, you may have to forfeit some aim and stay more parallel to the screen. In

such cases, some lens offset can reduce the keystone distortion.

Later, when your projector is up-and-running, adjust precise image geometry and

placement as described in 2.7, Basic Image Alignment.

Throw distance is the distance between the projector and the screen (Figure

2.11). For any installation, placing the projector at an accurate throw distance is

necessary in order for the image size to closely match your screen – the farther

the projector is from the screen, the larger the image. With zoom lenses, you’ll

want to know the approximate minimum and maximum image sizes possible

from a given throw distance so that the most appropriate lens is installed at the

site (throw distance / screen width = throw ratio of lens).

Calculating Throw Distance

Once you know the screen size and lens type, calculate the required throw

distance by using the appropriate formula provided in Table 2.3. NOTES: 1) If

your projector is tilted up or down in relation to the screen (typical in large

venues and/or elevated installation), throw distance still represents the smallest

measurement between the screen and front bezel. 2) Remember that throw

Positioning at a

Port Window

Throw Distance

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Christie CP2000-X Setup Guide Page 17