dB— decibel—A unit used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten times the common logarithm of the ratio of the two levels.

Diagonal Screen— A method of measuring the size of a screen or a projected image. It measures from one corner to the opposite corner. A 9FT high, 12FT wide, screen has a diagonal of 15FT. This document assumes that the diagonal dimensions are for the traditional 4:3 ratio of a computer image as per the example above.

DLP®— Digital Light Processing™—Reflective display technology developed by Texas Instruments, using small manipulated mirrors. Light passes through a color filter is sent to the DLP mirrors which arrange the RGB colors into a picture projected onto screen, also known as DMD.

DMD— digital Micro- Mirror Device— Each DMD consists of thousands of tilting, microscopic aluminum alloy mirrors mounted on a hidden yoke.

DVI-D—Digital Visual Interface-Digital connector.

Focal Length— The distance from the surface of a lens to its focal point.

Frequency— It is the rate of repetition in cycles per seconds of electrical signals. Measured in Hz (Hertz).

Hz (Hertz)— Unit of frequency.

Keystone Correction— Device that will correct an image of the distortion (usually a wide-top narrow-bottom effect) of a projected image caused by improper projector to screen angle.

Maximum Distance— The distance from a screen the projector can be to cast an image that is usable (bright enough) in a fully darkened room.

Maximum Image Size— The largest image a projector can throw in a darkened room. This is usually limited by focal range of the optics.

Minimum Distance— The closest position that a projector can focus an image onto a screen.

NTSC— National Television Standards Committee. North American standard for video and broadcasting, with a video format of 525 lines at 30 frames per second.

PAL— Phase Alternating Line. A European broadcast standard for video and broadcasting, with a video format of 625 lines at 25 frames per second.

Reverse Image— Feature that allows you to flip the image horizontally. When used in a normal forward projection environment text, graphics, etc, are backwards. Reverse image is used for rear projection.

RGB— Red, Green, Blue— typically used to describe a monitor that requires separate signals for each of the three colors.

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Glossary

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Dell 1209S manual Glossary
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1209S specifications

The Dell 1209S is a compact and versatile projector designed to meet the needs of both business professionals and educational institutions. Known for its portability and high-quality projection capabilities, the Dell 1209S stands out as an excellent choice for presentations and classrooms alike.

One of the main features of the Dell 1209S is its impressive brightness capability, delivering up to 2700 ANSI lumens. This ensures that images and presentations remain clear and visible even in well-lit environments. Coupled with a high contrast ratio of 4000:1, the projector provides sharp and vibrant colors, enhancing the viewing experience and making it easier for audiences to engage with the content.

The Dell 1209S utilizes DLP (Digital Light Processing) technology, which is known for its reliability and longevity. DLP projectors are less prone to image degradation over time compared to other types. This technology features a spinning color wheel and micro mirrors that help produce crisp images with smooth motion handling, making it suitable for displaying everything from slideshows to videos.

Portability is a key characteristic of the 1209S. Weighing only about 5.5 pounds and featuring a compact design, it's easy to transport from one location to another. This makes it an ideal companion for business trips, outdoor presentations, or any situation where space and weight are considerations.

Connectivity options abound in the Dell 1209S, including HDMI, VGA, and composite video ports. This versatility means users can easily connect a wide variety of devices, such as laptops, DVD players, and document cameras. Additionally, the projector supports multiple aspect ratios, including 4:3 and 16:9, which allows users to adapt their presentations to different formats with ease.

Another noteworthy feature is the long lamp life, which can extend up to 10,000 hours in eco mode. This not only reduces maintenance costs but also significantly decreases downtime, allowing users to focus on delivering content rather than worrying about replacing bulbs frequently.

In summary, the Dell 1209S is packed with features that make it an excellent choice for anyone seeking a reliable, high-quality projector. Its powerful brightness, DLP technology, portability, diverse connectivity options, and long-lasting lamp life combine to create a versatile tool that delivers impressive performance in various settings. Whether for business or education, the 1209S meets the demands of modern presentation needs efficiently.
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