Cisco Cisco Prisma II EDR Receiver Installation Guide
78-748705-01 Rev C
Glossary-3
Glossary
, Continued
Compression
The non-linear change of gain at one level of a signal with
respect to the change of gain at another level for the same
signal. Also, the elimination of redundant information from
an audio, data, or video signal to reduce transmission
requirements.
CSO
Composite Second Order
CTB
Composite Triple Beat
C/T
Carrier-to-noise temperature ratio
CW
Continuous Wave
dB
Decibel
dBc
Decibels relative to a reference carrier
DBDS
Digital Broadband Delivery System
dBm
Decibels relative to 1 milliwatt
dBi
Decibels of gain relative to an isotropic radiator
dBuV
Decibels relative to 1 microvolt
dBW
Decibels relative to 1 watt
dBmV
Decibels relative to 1 millivolt
DC
Direct current
DC
Directional coupler
DES
Data Encryption Standard
Deviation
The peak difference between the instantaneous frequency
of the modulated wave and the carrier frequency, in an FM
system.
DFB
Distributed feed back laser
Differential gain
The difference in amplification of a signal (superimposed
on a carrier) between two different levels of carrier.
Diplex filter
A filter which divides the frequency spectrum into a high
frequency segment and a low frequency segment so that
two different signals can be sent down the same
transmission path.