Tektronix DS1001, Руководство пользователя

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DS1000 Series User Manual
Glossary–1
Glossary
Bandwidth
The range of frequencies over which signal amplitude remains
constant (within some limit) as it is passed through a system.
Baseband
The composite video signal before it modulates the picture carrier.
Composite video that is distributed throughout a studio and is used
for recording is at baseband.
Broad Pulses
The vertical synchronizing pulses in the center of the vertical
interval. These pulses are long enough to be distinguished from all
others and are the part of the signal actually detected by vertical
sync separators.
Burst
A small reference packet of the subcarrier sine wave sent on every
line of video. Since the carrier is suppressed, this phase and
frequency reference is required for synchronous demodulation of
the color difference signals in the receiver.
B-Y
One of the color difference signals used in the NTSC and PAL
systems. It is obtained by subtracting luminance (Y) from the blue
camera signal (B).
Chrominance
The color information in a television picture.
Chrominance Signal
The high-frequency portion of the video signal, that is obtained by
quadrature amplitude modulation of a 4.43 MHz (PAL) or
3.58 MHz (NTSC) subcarrier with R-Y and B-Y information.
Composite Video
A single video signal containing all of the necessary information to
reproduce a color picture.