Glossary

multimedia computers arrive on the market every day. With USB, up to 127 devices can run simultaneously on a computer.

●USB permits "hot plug-in." There's no need to shut down, plug in, reboot and run set-up to install peripherals. And no need to go through the reverse process to unplug a device.

In short, USB transforms today's "Plug-and-Pray" into true Plug-and-Play!

Hub

A Universal Serial Bus device that provides additional connections to the Universal Serial Bus.

Hubs are a key element in the plug-and-play architecture of USB. The Figure shows a typical hub. Hubs serve to simplify USB connectivity from the user's perspective providing low cost and complexity.

Hubs are wiring concentrators and enable the multiple attachment characteristics of USB. Attachment points are referred to as ports. Each hub converts a single attachment point into multiple attachment points. The architecture supports concatenation of multiple hubs.

The upstream port of a hub connects the hub towards the host. Each of the other downstream ports of a hub allows connection to another hub or function. Hubs can detect, attach and detach at each downstream port and enable the distribution of power to downstream devices. Each downstream port can be individually enabled and configured at either full or low speed. The hub isolates low speed ports from full speed signaling.

A hub consists of two portions: the Hub Controller and Hub Repeater. The repeater is a protocol- controlled switch between the upstream port and downstream ports. It also has hardware support for reset and suspend/resume signaling. The controller provides the interface registers to allow communication to/from the host. Hub specific status and control commands permit the host to configure a hub and to monitor and control its ports.

Device

A logical or physical entity that performs a function. The actual entity described depends on the context of the reference. At the lowest level, device may refer to a single hardware component, as in a memory device. At a higher level, it may refer to a collection of hardware components that perform a particular function, such as a Universal Serial Bus interface device. At an even higher level, device may refer to the function performed by an entity attached to the Universal Serial Bus; for example, a data/FAX modem device. Devices may be physical, electrical, addressable, and logical.

file:///D/My%20documents/dfu/150B5/english/150b5/glossary/glossary.htm (3 of 5)9/13/2004 3:37:07 PM

Page 21 Page 23
Page 22
Image 22
Philips 150b5 user manual Hub
Page 21 Page 23

150b5 specifications

The Philips 150B5 is a versatile monitor designed to meet the demands of modern office environments while providing exceptional performance and user comfort. Known for its sleek design and advanced technology, this 15-inch display is an ideal choice for professionals seeking efficiency and quality in their workstations.

One of the most notable features of the Philips 150B5 is its excellent display quality. With a resolution of 1024 x 768 pixels and an aspect ratio of 4:3, the monitor delivers sharp, clear images and vibrant colors, making it perfect for a range of applications from spreadsheets to graphic design. The use of LCD technology ensures that the monitor is energy-efficient while also offering quick response times, reducing blur in moving images.

The Philips 150B5 is equipped with a number of innovative features aimed at enhancing the user experience. Adjustable settings for brightness, contrast, and color performance allow users to customize their viewing experience based on personal preference and ambient lighting conditions. Furthermore, the monitor boasts a wide viewing angle, ensuring that colors remain consistent even when viewed from different perspectives.

Connectivity is another strong point of the Philips 150B5. The monitor comes with multiple input options, including VGA and DVI ports, providing compatibility with a wide range of computers and devices. This flexibility makes it an excellent choice for users who need to switch between different workstations or setups frequently.

An essential aspect of the Philips 150B5 is its ergonomic design. The monitor features an adjustable stand, allowing users to change the height, tilt, and swivel settings for maximum comfort. This ensures that prolonged use does not lead to discomfort or strain, promoting better posture and a healthier work environment.

In summary, the Philips 150B5 combines exceptional display quality, flexible connectivity options, and ergonomic features to create a monitor that is well-suited for the rigors of day-to-day professional use. Its compact size makes it an excellent choice for smaller office spaces or for those who require a secondary display. With its blend of performance and comfort, the Philips 150B5 remains a popular choice among users looking for a reliable and efficient monitor solution.
Top Page Image Contents