Ambient Lighting; Other Considerations - Christie Roadie HD+35K User Manual

2.2.4 Ambient Lighting

The extraordinary brilliance of this projector is certainly well suited for locations where ambient lighting might
be considered less than ideal for projection. Even a typical room or large auditorium fully lit 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.

2.2.5 Other Considerations

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 that may affect
performance.
• Keep the projector away from devices that 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 over-
all effect. A good rule of thumb is to be no closer than 1.5 times the width of the screen.
Roadie HD+35K User Manual
020-100340-02 Rev. 1 (01-2010)
Screen Type "All the Pixels All the Time"
SIDE-MASKING SCREEN
Masking
(2.39 screens)
TOP-MASKING SCREEN
(1.85 screens)
Masking
NOTE: Example shows vertical offset
EXTRA SHORT THROW
and
FIXED SIDE MASKING
(1700 across,
approx.)
Top and/or bottom masks present
Figure 2-12 Switching between Flat and Scope Displays
Quickest Scope --> Flat
Flat
(1700 across)
Scope
(2048 across)
Flat
Scope
Re-size electronically with TPC
source & screen settings
1280 -->1700 (approx.)
M
O
O
Z
out
1280 --> 2048
(Masking)
Z
O
O
M
in
Section 2: Installation and Setup
Flat
Masking
Scope
Flat
Scope
Flat
Scope
2-11