Glossary
© 2013 Harmonic Inc.
372
Ellipse 3000 r.3.0, Rev. B
CA Descriptor
A descriptor which may be added to the
and identifies the
system and other
information related to that system.
CAM
Acronym for CA Module and is a standardized card which is used to unscramble services.
card
See
carrier frequency range
For a receiver, the range of valid input signals.
CAS
Conditional Access System. Scrambles the programming material and allows conditional
access to the descrambled information on the basis of subscriber authorization. In consumer
applications, CAS allows access to certain programs on the basis of a monetary exchange. In
commercial applications, CAS allows controlled access to proprietary programs.
CAT
Conditional Access Table. The CAT informs the receiver of conditional access system (
CAS
)
information, such as the
stream for provisioning the receiver.
CBR
Constant Bit Rate.
CC
Closed Captions or Continuity Counter. Readers are cautioned to avoid use of this
abbreviation unless it is clearly stated in context.
CEA
Consumer Electronics Association.
CEA-608
Line 21 Data Services.
CEA-708
Digital Television (DTV) Closed Captioning.
channel
For NMX, a collection of circuits (video, audio, data, EMM, and ECM Generator) that are
related to each other in the Program Association Table.
chroma
The color difference component of the video signal. Sometimes termed “chrominance.”
See
also
