CMN-91
Appendix C
Installation and Operation Manual
Glossary
© 2016 Imagine Communications Corp. Proprietary and Confidential.
Revision D | Page 181
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.
CSD Master Clock Driver
D/A Conversion of digital to analog signals.
DA Distribution Amplifier
dBTP Decibels relative to nominal 100%, true-peak
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
Dialnorm An AC-3 metadata parameter, numerically equal to the absolute value of the Dialog Level,
carried in the AC-3 bit stream.
Dialog Level The loudness, in LKFS units, of the Anchor Element.
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.
Display On VTM Series units, the output that appears on the DVI/XGA monitor. On TVM series units, the
output at the front LCD or XGA/DVI connector.
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.
DST Daylight Savings Time
Duration Duration is used to determine how long an error must persist before it is reported. Setting the
duration to 0 causes an error to be displayed as soon as the CES value is met.