Appendix D
♦
Glossary
CMN-41 Series Installation and Operation Handbook
135
Copyright © 2009, Harris Corporation
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, and so forth. 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
Differential Gain
A measurement that specifies how much the chrominance gain is
affected by the luminance level. Expressed as a percentage showing the largest
amplitude change between any two levels, it indicates how much color saturation
variance occurs when the luminance level changes.
Differential Phase
A peak-to-peak measurement that specifies the extent to which
the chrominance phase is affected by the luminance level. Expressed in degrees of
subcarrier phase, it indicates how much hue shift occurs with luminance level changes.
Digital Video Broadcasting (DVB)
A specific project office of the European
Broadcast Union. This group has produced a set of digital broadcasting standards.
DSK
Down Stream Key, a keyer which is electronically located after (or down stream
from) all other functions of a switcher. The key resulting will appear to be on top of all
other pictures from the switcher.
D-VITC
Digital Vertical Interval Time Code. Timecode information stored on specific
lines in the vertical blanking interval of a television signal.
Display
In the CMN-41, the output at the Front LCD or XGA/DVI connector.
EAV
End of Active Video in component digital systems.
EBU
European Broadcasting Union
