Installation Considerations - Christie roadie 25k User Manual

STEP 8
STEP 9
2.2 Installation
Considerations
Screen Types
'
Adjust the Lens
Turn the focus knob to sharpen the image. Adjust the zoom ring on the lens to
increase or decrease image size (not available when using the 1:1 fixed lens). If
desired, use the horizontal and/or vertical offset knobs to shift the image location.
'
Set Cable Length
In the Lamp menu, set the "Cable Length (m)" slidebar to match the length of the
high-voltage DC cables connected between your lamp ballast and projection head.
This regulates the voltage drop that occurs over distance, and ensures that adequate
voltage reaches the lamp. Particularly in projectors rented for temporary installations,
this setting may have to be changed from its last use. Adjustment range is 2-30m
(6½-100 ft.).
Press Aut o and/or
Menu
Setup
Using Inputs and Channels.
Although the Roadie 25K is carefully engineered to deliver an exceptional quality
high brightness, high resolution output, your final display results could still be
compromised if the projector is improperly installed. This subsection discusses issues
to consider before proceeding with a final installation. Even for temporary
installations, this information will help you to better understand what may be done to
ensure optimized images.
'
Front Screen Installations
This projector is intended for use with flat or slightly curved screens, front or rear,
ranging from about 5 meters (16 ft.) to 25 meters (82 ft.) wide. Although flat screens
generally offer a low gain similar to a matte white wall paint—approximately 1 with
a viewing angle just under 180°—and are considered most effective when ambient
light is low, this difference in gain may be negligible given the very high light output
from this projector. In addition, incident light reflects equally in all directions so the
audience can see the display from more acute viewing angles. See Figure 2.4.
Figure 2.4. Audience Coverage with a Flat Screen
NOTE: Roadie 25K lenses are designed primarily for use with flat screens, but the
projector's depth-of-field range allows the lens to be focused on mildly curved
screens as well. While focus remains sharp in the corners, there may be significant
pincushion distortion, primarily at the top of the screen.
to refine other display parameters as necessary. See also 3.6,
INSTALLATION AND SETUP
Roadie 25K User's Manual
2-5