Glossary of Specifications

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The caliber/quality of the lens designed for the camera’s capabilities. Unlike conventional cameras, digital camera lenses are designed to work with a specific sensor size.

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Because of the sensor size, the lenses used in digital compact cameras have to be of much higher optical quality than glass, which would be acceptable on a 35mm camera. This is less of an issue with digital SLRs because their sensors are much larger.

Some digital cameras have internal memory, while others rely on memory cards to save the captured images. The size of the memory determines the number of images that can be saved at one time.

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For example: HP Photosmart R707 stores its images in 32MB of internal memory (of which 27MB is available for storage), or alternatively on optional Secure Digital (SD) memory cards.

Digital images are made up of millions of dots called pixels, and the greater amount of pixels the camera has, the more detail the camera can capture.

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For example: a camera that captures 1600 x 1200 pixels produces an image with a resolution of 1.92 million pixels and would be referred to as a 2.0 megapixel camera. You get to 1.92 million pixels by multiplying the vertical and horizontal dimensions.

Shutter speed determines the length of time the camera's sensor is exposed to light. In other words, a digital camera’s shutter switches on the light-sensitive photodiodes of the sensor for the length of time determined by the shutter speed.

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To get more light into the camera you decrease the shutter speed, or keep the shutter open for a longer period of time.

The ability to record a snippet of sound to accompany a picture captured on a digital camera. The sound snippet is stored with the image so you can refer back to it later.

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If you are using your camera to capture product images or other shots for marketing materials, you can make an audio note to yourself of when and where you took the picture, as well as any ideas you have for using it in your business.

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A printer's connectivity interface affects the kind of computers and networks with which the printer can connect. HP printers connect to PCs using one or more of the following interfaces:

• Parallel: Printers that have a parallel interface can simultaneously transfer several different bits of information. Because they communicate in two directions, these printers can tell you when an error occurs during printing.
• Serial: Printers with a serial interface can only transfer one bit of information at a time. These printers can only transmit information in one direction but are capable of sending data over great distances.
• USB (Universal Serial Bus): Printers with a USB interface support a data transfer speed of 12 megabits per second. USB is available in both 1.0 and 2.0, and is gradually replacing serial and parallel ports as the standard interface for connectivity to PCs, making printers with USB support a good investment for future extensibility.
• Infrared: Printers that have an infrared interface allow communication to the computer without using cords or wires. Infrared connections require infrared readers on both the printer and a PC to have an unblocked view of one another to transmit data.

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Many of HP's inkjet and LaserJet printers and MFPs (multifunction products) are equipped with HP Jetdirect internal print servers that allow you to connect the printer directly to your company's Local Area Network (LAN) with a standard Ethernet cable. Once you attach the printer to your network, all of the users on your network can share it.

It may be less expensive to purchase a single workgroup printer to share over the network instead of several personal printers that won't be shared. Workgroup printers can typically provide your employees with more features than personal printers and you can use Web Jetadmin -- HP's free print network management tool -- to conveniently and easily manage all of your networked printers from a single location.

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Networked printers print at network speeds and give you the flexibility to place printers anywhere you'd like in your office. And you can either use the built-in Web server to view and manage your printer from any Internet-connected computer or use HP's Web Jetadmin software to manage multiple printers. Learn more about the benefits of connecting your printers to the network.

See Printing Technologies

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ImageREt 2400 provides the best color print-quality without changes to driver settings or trading print quality for better performance or less memory. ImageREt 2400 uses multi-layer technologies to modulate dot size and position as well as multi-level technologies to precisely control color by combining up to four colors within a single dot and by varying the amount of toner in a given area.

HP ImageREt 2400 utilizes these five technologies to offer high-quality printing:

• High resolution laser imaging system
• Robust print mechanism
• Image enhancements
• Closed loop color calibration
• Smart supplies with chemically-grown spherical toner

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ImageREt 3600 provides the best color print-quality without changes to driver settings or trading print quality for better performance or less memory. ImageREt 3600 uses multi-layer technologies to modulate dot size and position as well as multi-level technologies to precisely control color by combining up to four colors within a single dot and by varying the amount of toner in a given area.

HP ImageREt 3600 utilizes these seven print technologies to deliver professional print quality:

• High resolution laser imaging system
• Accurate print mechanism
• Superior image enhancements
• Intelligent color control
• Adaptive gloss finish
• System-optimized for HP high gloss paper
• Smart printing supplies with chemically-grown spherical toner

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ImageREt 480000 provides the best color print-quality without changes to driver settings or trading print quality for better performance or less memory. ImageREt 4800 uses multi-layer technologies to modulate dot size and position as well as multi-level technologies to precisely control color by combining up to four colors within a single dot and by varying the amount of toner in a given area.

HP ImageREt 4800 combines these seven technologies to deliver a print quality that has never been seen until now:

• High resolution laser imaging system
• Accurate print mechanism
• Superior image enhancements
• Intelligent color control
• Adaptive gloss finish
• System-optimized for HP high gloss paper
• Smart printing supplies with chemically-grown spherical toner

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Printers equipped with HP PhotoREt technology uses color layering technology to produce photo-quality color images. With advancements in its multidrop color layering process, HP PhotoREt controls the placement of those six inks more precisely than before. Each dot is capable of receiving up to 32 minuscule drops of color, each one precisely positioned to achieve smoother gradations in tone and to virtually eliminate any grain in the printed image.

Full dye-load inks in cyan, magenta, and yellow, produce vibrant color. Light dye-load inks of light cyan and light magenta, as well as a specially formulated dye-based black ink, dramatically increase the range of available colors, while the black is richer, deeper, and glossier than the usual black that is produced by a composite of colored inks. This means you'll get finer details and a wider range of colors.

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Inkjet and laser technologies in HP printers are both designed for outstanding, efficient, reliable results for a variety of needs.

• Support for specialty papers, wide format, and unique media types
• Photorealistic image capabilities
• No fuser or drum replacement costs

• High-volumes and fast output of lengthy documents
• High-yield consumables
• Multiple high-volume paper trays and finishing options

Learn more about ink and laser technology

What is it?
Laser Quality Speed (LQS) is an HP-developed specification to enable a speed comparison of HP Officejet Pro printers to laser printers, thereby assisting customer purchase considerations.
The print speed experienced by customers from an Inkjet printer is highly dependent on many variables, including the coverage and content of the printed document. In contrast, laser print speed is much less dependent on document content and coverage. The Laser Quality Speed specification helps customers make a performance comparison between the print speeds of an inkjet printer and a laser printer. 

How does it work?
To measure Laser Quality Speed for an inkjet printing device, HP prints a representative suite of documents in the printer’s default quality setting (normal mode for HP Officejet Pro K550 Color Printer). The suite includes several monochrome & color documents, including pages of various text coverage, and full page graphics and image files. The speed reporting methodology averages the print engine’s black and color speeds, in pages per minute, by calculating an average text print speed, and then averages that speed with the print speed of a more complex, full page document. The resulting average pages per minute (ppm) speed determine the “Laser Quality Speed” specification.

HP’s Laser Quality Speed measurement process is based on three important factors:

• Speed measurements use comparable print qualities. For the HP Officejet Pro K550 series printer, the default plain paper normal mode is used to generate the Laser Quality Speed specification of up to12 ppm black and up to 10 ppm color. This is up to twice as fast as comparably priced color lasers for color speeds.
• Speed measurements are done over a range of document types and content.
• The measurement process is designed to avoid the influence of the host PC performance, and to represent the printer hardware, or print engine, performance.

This approach allows a more direct comparison with published laser printer ppm speed specifications. Laser Quality Speed is based on HP internal testing and methodology and is not an industry standard.

Where is it used?

Laser Quality Speed is used in product data sheets, customer education manuals, brochures, collaterals, and other customer communications meant to help customers make purchase choices between inkjet and laser printers.

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HP color technologies use layers of color to deliver higher quality printing without the disadvantages of higher DPI. They control the size, color, and shade of ink dots, with a higher percentage of dots at the outline of an image, and blend the dots within the image for better overall image quality.

On inkjet printers, media also has a significant affect on the final quality and resolution of an image. To obtain the highest photo quality DPI, you should use a combination of HP PhotoREt ink technology and premium photo papers or high-resolution inkjet papers.

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Print speed specifications define what the printer is capable off, but several factors affect the time it takes for each page in your document to print:

• The complexity of the page you are printing. Images take longer to print than text, and image-intensive pages can take longer to print than those with a single page.
• The connection between your printer and the computer sending the files to be printed. A slow network connection can impede the transmission of files from a computer to the printer.
• The amount of memory installed on the printer. The more memory available to the printer, the faster its output.

Print speed is a key consideration if you are purchasing a printer that will be used regularly by several employees. If your staff is waiting for the print outs they need to do their jobs, they will be less productive than if they can immediately pick up the documents they send to the printer.

The numbers of pixels (in millions) that are supported by a projector’s default display resolution. HP projectors are available in two native resolutions: SVGA (800 x 600) and XGA (1024 x 768). Since digital images are made up of millions of pixels, the greater number of pixels that can be displayed by a device provides the most detail.

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Although a projector has a default (or native) display resolution, most all projectors will display resolutions other than their default. For example, an SVGA projector can accept an XGA 1024 x 768 signal and compress it into its 800 x 600 resolution. Equally, most XGA projectors can take an 800 x 600 signal and scale it up to its default 1024 x 768 resolution.

A general rule of thumb is that no projector compresses or scales a non-default signal cleanly. The result is a soft-focus look when you project spreadsheets and text documents. When selecting a projector for purchase, resolution scaling or compression should not be a factor for selecting a projector. When planning your presentations, match the resolution of your computer to the display resolution of the projector.

Designed for permanent placement in conference rooms and auditoriums with 15 or more participants and little or no ambient lighting. A permanent installation typically includes audio connections to built-in or permanently affixed high-end sound systems.

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HP digital projectors such as the xp8010 and xp8020 series ensure that your messages are conveyed with crisp, bright, easy-to-read images and text. Not to mention -- with the integration of HP color innovations, these digital projectors will do the work for you, allowing you to focus your attention where it needs to be the most: on your audience.