Projector Christie Roadie X10 User Manual

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							Appendix D
Serial Communication Cables
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When connecting a projector to a computer, another projector, or a Marquee Signal Switcher, use the appropriate
serial communication cabling as illustrated. For all connections, make sure to use high quality shielded cabling. 
						

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							Appendix E
Throw Distance
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Calculating Throw Distance
The larger the image needed, the greater the distance required between the lens and screen.
Correct throw distance depends on the screen width and lens throw ratio—once you know
what is present, you can use the appropriate formula provided in this appendix to calculate
the precise throw distance for
your application.
Throw distance is measured
between the projector front feet
and the screen. This
measurement is not necessarily
parallel to the floor—i.e., the
projector and screen may be
inclined.
NOTE: If your projector is
tilted in relation to the
screen, as is sometimes the
case for large venues or
elevated installations, throw distance still represents the smallest measurement
between the screen and front feet.
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% or more) for your installation, lens
and projector model.
Table E-1. Throw Distance Formulas (ft.)
Lens Throw RatioThrow Distance Formula (ft.), ±5% or moreDiagonal Screen Size ➹ (ft.)
0.8:1 (X10)
0.6:1 (X12)
.79 x screen width (↔ ft.) + 0.60
.62 x screen width (↔ ft.) +0 .585-25
1.5 - 2.5:1 (X10)
1.2 - 1.9:1 (X12)
TD range = [1.49 x screen width (↔ ft.)] + 0 .53  to [2.48 x screen width (↔ ft.)] + 0.47
TD range = [1.2 x screen width (↔ ft.)] + 0 .36  to [1.93 x screen width (↔ ft.)] + 0.396-40
2.5 - 4:1 (X10)
2.0 - 3.2:1 (X12)
TD range = [2.51 x screen width (↔ ft.)] + 0.07 to [3.95 x screen width (↔ ft.)] + 0.07
TD range = [1.98 x screen width (↔ ft.)] + 0.35 to [3.18 x screen width (↔ ft.)] + 0.276-40
4 - 7:1 (X10)
3.1 - 5.6:1 (X12)
TD range = [4.1 x screen width (↔ ft.)] + 0.27 to [6.39 x screen width (↔ ft.)] + 0.14
TD range = [3.05 x screen width (↔ ft.)] + 1.02 to [5.57 x screen width (↔ ft.)] – 0.0710-40
7 - 15:1 (X10)
5.6 - 12:1 (X12)
TD range = [6.86 x screen width (↔ ft.)] + 1.79 to [14.92 x screen width (↔ ft.)] + 0.62
TD range = [5.79 x screen width (↔ ft.)] – .78 to [11.93 x screen width (↔ ft.)] + 0.5910-50
NOTE: Make sure to use HORIZONTAL screen width (↔) in all formulas. 
						

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