Appendix: Glossary

ANSI Lumens — A standard for measuring the brightness. It is calculated by dividing a square meter image into nine equal rectangles, measuring the lux (or brightness) reading at the center of each rectangle, and averaging these nine points.

Aspect Ratio — The most popular aspect ratio is 4:3 (4 by 3). Early television and computer video formats are in a 4:3 aspect ratio, which means that the width of the image is 4/3 times the height.

Brightness — The amount of light emitted from a display or projection display or projection device. The brightness of projector is measured by ANSI lumens.

Color Temperature — The color appearance of white light. Low color temperature implies warmer (more yellow/red) light while high color temperature implies a colder (more blue) light. The standard unit for color temperature is Kelvin (K).

Component Video — A method of delivering quality video in a format that consists of the luminance signal and two separate chrominance signals and are defined as Y'Pb'Pr' for analog component and Y'Cb'Cr' for digital component. Component video is available on DVD players.

Composite Video — A video signal that combines the luma (brightness), chroma (color), burst (color reference), and sync (horizontal and vertical synchronizing signals) into a signal waveform carried on a single wire pair. There are three kinds of formats, namely, NTSC, PAL, and SECAM.

Compressed Resolution — If the input images are of higher resolution than the native resolution of the projector, the resulting image will be scaled to fit the native resolution of the projector. The nature of compression in a digital device means that some image content is lost.

Contrast Ratio — Range of light and dark values in a picture, or the ratio between their maximum and minimum values. There are two methods used by the projection industry to measure the ratio:

1 Full On/Off — measures the ratio of the light output of an all white image (full on) and the light output of an all black (full off) image.

2 ANSI — measures a pattern of 16 alternating black and white rectangles. The average light output from the white rectangles is divided by the average light output of the black rectangles to determine the ANSI contrast ratio.

Full On/Off contrast is always a larger number than ANSI contrast for the same projector.

Glossary

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Dell S500WI manual Appendix Glossary, Glossary 127

S500WI, S500 specifications

The Dell S500 and S500Wi represent the company's commitment to delivering high-performance projectors tailored for diverse environments, including corporate, educational, and home use. Both models boast a variety of features that enhance their usability and versatility.

The Dell S500 is designed to provide crisp and vivid images, leveraging its advanced DLP (Digital Light Processing) technology. With a brightness level of up to 3500 ANSI lumens, it ensures that presentations remain clear even in well-lit rooms. This feature is particularly beneficial for businesses that require effective visual communication in various lighting conditions.

One of the standout characteristics of the S500 is its high resolution of 1024 x 768 pixels. This allows for detailed image reproduction, making it suitable for displaying intricate visuals, graphs, and text with sharp clarity. The contrast ratio of 2000:1 further enhances image quality, delivering deeper blacks and more vibrant colors, which is crucial for producing engaging presentations.

In terms of connectivity, the Dell S500 incorporates multiple input options, including HDMI, VGA, and USB, ensuring compatibility with a wide range of devices. This flexibility allows users to connect their laptops, tablets, and even smartphones effortlessly. Additionally, the projector supports wireless connectivity through optional adapters, enabling a clutter-free presentation setup.

The Dell S500Wi takes interactivity to the next level with its touch-enabled capabilities. It features interactive wireless projection, allowing users to engage with presentations directly on the screen. This is particularly advantageous in educational settings, where teachers can draw, annotate, and highlight information in real-time. The S500Wi’s interactive capabilities are powered by an intuitive interface that enhances collaboration during group sessions.

Both models incorporate energy-efficient technologies to reduce power consumption, contributing to lower operational costs. Their long lamp life of up to 4000 hours in eco-mode ensures that users spend less time and money on maintenance.

Robust and portable, the Dell S500 and S500Wi are built to withstand frequent transportation, making them ideal for users who require performance on the go. The projectors are lightweight and compact, allowing easy setup and adjustment in various environments.

In summary, the Dell S500 and S500Wi projectors offer an impressive combination of brightness, resolution, interactivity, and connectivity options, making them suitable for a wide range of applications, from boardrooms to classrooms. With these projectors, Dell continues to advocate for innovation in visual technology, ensuring users have access to tools that enhance communication and collaboration.