1710J-Series Waveform Monitors
Glossary–1
Glossary
Accuracy
The closeness of the indicated value to the true value.
Black Level
The level of the picture signal that corresponds to the maximum black peaks.
Blanking Level
The level of the picture signal that separates the picture information from the
synchronizing information. Also see Setup.
Chrominance
The property of light that produces a sensation of color in the human eye
apart from any variation in luminance that may be present.
Chrominance Filter
A specially designed filter that passes the chrominance portion of the color
signal while reducing the amplitude of other frequencies.
Clamp
A circuit that adds a fixed bias level to a particular portion of the television
waveform. Also see DC Restorer.
Color Bar Signal
A test signal typically containing eight basic colors (white, yellow, cyan,
green, magenta, red, blue, and black) that is used to check chrominance
functions of the color television system.
Color Burst
A sample of chrominance subcarrier frequency that establishes a reference
for demodulating the chrominance signal.
Composite Video
A signal containing vertical (field), horizontal (line) synchronizing signals,
color synchronizing (burst) signal, and the picture luminance and chromi-
nance information.
DC Restorer
A circuit used in waveform monitors and picture monitors to clamp one
point of the waveform to a fixed DC level.
Differential Gain
The difference in output amplitude, expressed in percent of dB, of a small
high frequency sine wave signal at two stated levels of a low frequency
signal on which it is superimposed.
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