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- Number of terms: 20560
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Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
A strategy where cache data is always written into main memory when data is written by the CPU. The write-through is done through the cache system.
Industry:Software
A term sometimes used to describe a number of scanning lines per frame, interlace ratio, and frame rate; also sometimes used to describe what appears when scanning lines are visible.
Industry:Software
Line rate and field rate sweep signals can be used to measure the frequency response of a system. In a sweep signal, the frequency of the waveform is continuously increased over the length of the line or field. A sweep signal allows you to examine the frequency response continuously over the interval of interest rather then at only discrete frequency intervals as tested by the multiburst or multiphase signals. The Sweep signal however cannot be used for VITS, thus is limited to out-ofservice testing. See the Frequency Response discussion.
Industry:Software
a) That part of the video signal where the voltage level is at 0 IRE and the electron beam sweeps back from the bottom to the top of the screen. b) A period during which the electron beam in a display is blanked out while it travels from the bottom of the screen to the top. It is the black bar that becomes visible when the vertical hold on a television set is not correctly adjusted. The VBI is usually measured in scanning lines. When the VBI is subtracted from the total number of scanning lines, the result is the number of active scanning lines. In NTSC, the VBI has a duration of 20.5 or 21 lines (depending on the field), of which nine lines are devoted to the vertical synchronizing signal that lets television sets know when a field has been completed. The remaining lines have long been used to carry auxiliary information, such as test and reference signals, time code, and encoded text, such as captions for the hearing impaired. Some ATV schemes propose expanding the VBI to accommodate widescreen images by the letterbox technique; some propose using it as a sub-channel for additional picture information. See also Blanking.
Industry:Software
A boost which is greater at the center frequency than either above or below it.
Industry:Software
Equipment for making a record of a video waveform so that the mapped images may be stored and subsequently retrieved as the video waveform.
Industry:Software
a) A selector on the display that changes state or initiates an action when you touch it on screen. You use soft keys to select test signals or a sub-window of functions or to enter a file name. b) A soft key’s function changes to match the block above it, in the bottom line of the screen.
c) The softening of a key edge by reducing the gain of the keyer.
Industry:Software
The minimum force per unit cross-sectional area at which the tape or base film deforms without further increase in the load.
Units are pounds per square inch (psi) or pounds per tape sample of given width and base film thickness.
Industry:Software
a) One compressed picture or block of audio.
b) Decoded AAU or a decoded picture.
Industry:Software
