Glossary
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VTM-2400 Installation and Operation Handbook
CAV
Component Analog Video
CES
Consecutive Errored Samples
Composite Video
A single video signal that includes all color video and timing information.
A composite signal includes luminance, chrominance, blanking pulses, sync pulses and color
burst information.
Chrominance
The color portion of a video signal that represents the saturation and hue.
Black, gray and white have no chrominance; color signals have both chrominance and
luminance.
CH
Chroma
Chrominance/Luminance Delay (C/L Delay)
A measurement that indicates the amount
to which chrominance and luminance are aligned with respect to each other. A low C/L delay
figure can minimize the effects of ghosts or color offset on the received picture.
Clipping
The electronic process of shearing off the peaks of either the white or black
excursions of a video signal for limiting purposes. Clipping is often performed prior to
modulation to limit the signal.
CMRR
Common Mode Rejection Ratio
Color Burst
The portion of a color video signal which contains a short sample of the color
subcarrier. It is used as a color synchronization signal to establish a reference for the color
information following it and is used by a color monitor to decode the color portion of a video
signal. The color burst acts as both amplitude and phase reference for color hue and intensity.
The color oscillator of a color television receiver is phase locked to the color burst.
Composite Sync
A signal consisting of horizontal sync pulses, vertical sync pulses and
equalizing pulses only.
CRC
Cyclical Redundancy Check
Crosspoint
An electronic switch, usually controlled by a button on the panel. Control logic
will allow for only one crosspoint, for each bus, to be switched "ON" on at a time.
D/A
Conversion of digital to analog signals.
DA
Distribution Amplifier
Data Element
An item of data as represented before encoding and after decoding.
Decoded Stream
The decoded reconstruction of a compressed bit stream.
Decibel (dB)
A logarithmic measure of the ratio between two powers, voltages, currents,
sound intensities, etc. Signal-to-noise ratios are expressed in decibels.
Default
A factory preset value or condition.
Demodulator
A receiver, such as for television broadcast, cable, and closed circuit
applications. A TV demodulator receives and processes off-air or cable RF signals and provides
baseband video and audio outputs.
DHCP
Dynamic Host Configuration Protocol
