Madrigal Imaging MP-8 User Manual download pdf (Page 13)

Figure 2-4. Good Screen Placement

Other ➤

Considerations

Here are some other considerations and tips which can help you improve

the design of your projection system.

❑ Proper ventilation is important. The ambient temperature should be kept

constant and below 35° C (95° F). Keep the projector away from heating

and/or air conditioning vents. Changes in temperature can cause drifts in

the projector circuitry which may affect performance.

❑ Keep the projector away from devices which radiate electromagnetic

energy such as motors and transformers. Common sources of these

are slide projectors, speakers, power amplifiers, elevators, etc. Keep 35

mm slide projectors at least 2 feet away from the projector. Even if both

are not used at the same time, the magnetic fields created by the slide

projector can cause permanent magnetization of the projector.

❑ For rear screen applications, less space is required if a mirror is used to

fold the optical path.

❑ Choose the right screen size for your application:

• As screen size increases, magnification increases which reduces bright-

ness. This reduces the contrast ratio which affects legibility. Sharp

defined edges become soft and fuzzy. Consider whether screen size is

more important than these other vital picture characteristics.

• Installing a large screen in a small room is similar to watching televi-

sion close up; too large a screen can overpower a room. A good rule

of thumb is to be no closer than two times the height of the screen.

• Larger screens require greater attention to lighting conditions.

❑ When laying out your projection room, consider positioning the projector

and screen in a manner which will achieve maximum audience coverage

and space efficiency. For example, placing the screen along the larger wall

in a rectangular room will reduce audience coverage. Figure 2-5 shows two

examples of how audience coverage is maximized.

window

doordoor

Prime Audience

Area

INSTALLATION & SETUP

2.7

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Madrigal Imaging MP-8 User Manual Page 13