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  Glossary
U
Unbalanced audio - An unbalanced (single ended) interface uses only two conductors to carry the signal from one device to another, one conductor carries the signal and the other is the grounded return. In consumer audio systems this usually consists of a cable with a center conductor and a shield terminated in an RCA Phono plug. @teqgear
UPS - Uninterruptible Power Supply. A power supply that continues to provide voltage for a limited time after the main power is fails. @teqgear
URL - Uniform Resource Locator. An Internet address usually consisting of the access protocol (http) , the domain name (www.teqgear.com), and optionally the path to a file or resource residing on that server. @teqgear
USB - Universal Serial Bus. A “plug-and-play” interface, it allows a device to be added without an adapter card and without rebooting the computer. The number of devices being designed for USB continues to grow, from keyboards, mice, and printers to scanners, digital cameras, and ZIP drives. @teqgear
UXGA - Ultra Extended Graphic Array. Ultra XGA) A screen resolution of 1600x1200 pixels. total display resolution of 1,920,000 individual pixels that are used to compose the image delivered by a projector. Has an aspect ratio of 4:3. @teqgear
V
VCR - Video Cassette Recorder: An electronic device for recording and playing video images and sound on a videocassette. @teqgear
VGA - Video Graphics Array. The display standard for the PC. The video outputs to a 15-pin HD connector. VGA sigal is actually digital, but with lower resolution. It has a pixel by line resolution of 640 x 480 with a color palette of 16 bits and 256,000 colors at an aspect ratio of 4:3. @teqgear
VHF - Very High Frequency. The range of electromagnetic frequencies from 30MHz to 300MHz. Television broadcast range between 30 and 300 MHz, on channels 2 through 13. The FM radio band is between 88 to 108 MHz, on channels 6 and 7 . @teqgear
Video - The visual portion of a televised broadcast. The term is also widely used to refer to the display system of a computer. @teqgear
Video amplifier - The function of a video amplifier is to amplify a signal containing high-frequency components without introducing distortion. It is a low-pass amplifier having a bandwidth in the range from 2 to 100 MHz. @teqgear
Video connector - The connector on the video card or computer's graphics output that is connected to the video input on the local monitor. @teqgear
Video distribution amplifier - An amplifier for strengthening the video signal so that it can be supplied to a number of video monitors at the same time and at the orignal quality. @teqgear
Video gain - The amplitude of a video signal. @teqgear
Video standards - "NTSC", "PAL", and "SECAM." @teqgear
W
WAN - Wide Area Network. A wide area network or WAN is a computer network covering a wide geographical area, involving a vast array of computers. @teqgear
Watt - A unit of electrical power used to indicate the rate of energy produced or consumed by an electrical device. @teqgear
WLAN - Wireless Local Area Network. A form of local area network that uses radio waves to transmit data between nodes rather than through cable. Mobile devices, such as laptop computers and personal digital assistants, have helped spawn the "plugless" connection to WLANs. The IEEE 802.11 standard specifies the technologies for wireless LANs. @teqgear
WSXGA - Wide Super XGA. A wide screen resolution of 1680 x 1050 pixels at an aspect ratio of 16:10. @teqgear
WXGA - Wide XGA. Wide screen resolutions of 1366x768, 1280x800, 1280x768 pixels at the aspect ratio of 16:9, 16:10, 5:3 respectively. @teqgear
X
XGA - EXtended Graphics Array. A screen resolution of 1024x768 pixels at an aspect ratio of 4:3. @teqgear