INSTALLATION & SETUP
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Prime Audience |
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Figure 2-4. Good Screen Placement
Other | ➤ | Here are some other considerations and tips which can help you improve |
Considerations |
| 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
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