tailieunhanh - Fiber Optics Illustrated Dictionary - Part 23

The Fiber Optics Illustrated Dictionary - Part 23 fills a gap in the literature by providing instructors, hobbyists, and top-level engineers with an accessible, current reference. From the author of the best-selling Telecommunications Illustrated Dictionary, this comprehensive reference includes fundamental physics, basic technical information for fiber splicing, installation, maintenance, and repair, and follow-up information for communications and other professionals using fiber optic components. Well-balanced, well-researched, and extensively cross-referenced, it also includes hundreds of photographs, charts, and diagrams that clarify the more complex ideas and put simpler ideas into their applications context | Fiber Optics Illustrated Dictionary continuous wave A wave that is constant or unvarying in its major characteristics such as amplitude. continuous wave transmissions Any transmissions technology that employs continuous signals rather than pulses. Since most communications media rely on pulses or modulation to send meaningful information continuous wave transmission is more specialized and generally used in signaling situations such as security systems in which an interruption of the continuous wave serves as an alert or system startup signal. control field In many types of data communications that employ fields as information units a control field is assigned to contain information about how to process related data. control panel A console used to control operations of a system vehicle aircraft or network. The control panel may consist of physical switches or dials or may be a text or graphical interface on a computer screen often simulating switches and dials . Control Panel In Apple computer operating systems a collection of utilities accessible through the Apple Menu that provides access to many basic operating parameters including sound memory monitor settings network configuration settings etc. control segment In the Global Positioning System GPS the control segment is a global network of control and monitoring stations that ensure the accuracy of satellite positions and their clocks. This coordination is an important part of GPS as the data is derived in part from the relationship of the satellites to one another and their signals. See atomic clock. control terminal A workstation or personal computer configured to provide control of a network from any routing node. It acts as a command input and display console. Through remote access commands it is possible to control a network from a node other than the one that is physically connected to the terminal virtual terminal . controlled access unit CAU. In the generic sense a device in a link that selectively .