Christie Entero RPMWU Setup Guide download pdf (Page 15)

Section 2: Installation and Setup

Entero RPMWU/RPMSP-LED01 Setup Guide 2-3

020-100445-01 Rev. 1 (12-2009)

3. Gently wipe the surface using a figure-8 motion. Repeat this motion until the blemish is removed.

2.5 Calculating Throw Distance, Position and Mount Projector

Throw distance is the distance measured from your projector to the screen. This calculation determines if there

is enough room to install your projector with a desired screen size and if the image will be of the right size for

your screen. To estimate the throw distance, take the horizontal width of the screen and multiply it by the lens

throw ratio. The result determines approximately the distance the projector should be positioned from the

screen to project a focused image large enough to fill the screen. For example, using the standard 0.69:1 lens,

throw ratio would be roughly 0.69 x screen width.

IMPORTANT! Use the lens and screen size to calculate the precise throw distance. Due to lens manufacturing

tolerances for lens focal length, actual throw distance can vary

±2% between lenses with the same nominal

throw ratio.

Table 2.1 Entero Lens and Screen Diagonal

NOTE: Throw distance is measured from the front of the lens to the screen position. Throw ratio is defined as:

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).

Mounting the Projector

There are several methods for mounting the projector. In typical front and rear screen installations the projector

can be mounted to a secure and level surface. For details installation instructions, refer to the CC50-2301/

CC67-3001 Installation Manual (P/N: 020-100248-xx).

Special Mounting

The projector can also be rotated (front-to-back) up to 360

° and fixed in a rotated position without affecting

performance.

CHRISTIE Lens Screen Diagonal

Inches Meters

Min Max Min Max

0.69:1 50 100 1.3 2.5

Throw Ratio

throw distance

screen width

-----------------------------------2%=

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 57 58

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Christie Entero RPMWU Setup Guide Page 15