Sony Tektronix WFM 1125, Руководство пользователя

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WFM 1125 Option 0A/0B/0C/0D User Manual
Glossary-1
Glossary
Accuracy
The closeness of the indicated value to the true value.
Bandwidth
The range of frequencies over which signal amplitude remains constant
(within some limit) as it is passed through a system.
Black Burst
Analog timing reference signal containing composite sync and color-burst
with a black luminance level. See SMPTE RP-154-1994 for specifications.
Blanking Level
Refers to the 0 IRE level for NTSC systems (0.3 volt level, with respect to
sync tip, for PAL systems) which exists before and after horizontal sync and
during the vertical interval.
Burst (NTSC)
A small reference packet of the subcarrier sine wave, typically 8 or 9 cycles,
which is sent on every line of video. Since the carrier is suppressed, this
phase and frequency reference is required for synchronous demodulation of
the color information in the receiver.
Burst (PAL)
A small reference packet of the subcarrier sine wave sent during the
horizontal blanking interval 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.
Color Black
See Black Burst.
Color Difference Signals
Signals used by color television systems to convey color information in such
a way that the signals go to zero when there is no color in the picture. R–Y,
B–Y, I, and Q are all color difference signals for the NTSC system; U and V
are color difference signals for the PAL system. The component system color
difference signal are Y, P
B
, P
R
as specified by SMPTE and CCIR standards.
Color Gamut
The area between minimum and maximum reproducible limits for elements
of the color difference or RGB signals.
Component Video
Video which exists in the form of three separate signals, all of which are
required in order to completely specify the color picture. For example, R, G,
and B; or Y, R–Y, and B–Y.