Tektronix WFM 601i, Руководство пользователя

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WFM 601i Serial Component Monitor
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.
Baseband Refers to the composite video signal as it exists before modulating
the picture carrier. Composite video distributed throughout a studio and used for
recording is at baseband.
Baseband
Refers to the composite video signal as it exists before modulating
the picture carrier. Composite video distributed throughout a studio and used for
recording is at baseband.
Bowtie Bowtie display. A display used to assess relative timing and gain
through a three-channel component system.
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. Component
system color difference signal is 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.
Composite Video
A single video signal containing all of the necessary
information to reproduce a color picture. Created by adding quadrature amplitude
modulated R–Y and B–Y to the luminance signal for NTSC systems or U and V
to the luminance signal for PAL systems.
dB (Decibel) A decibel is a logarithmic unit used to describe signal ratios. For
voltages, dB = 20 Log
10
(V
1
/V
2
).