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Glossary
g–2
BW
Backward Alarm or Bandwidth
BWR
Bandwidth Ratio
C
Celsius
CE
Customer Equipment
C/N
Carrier-to-Noise Ratio
C/No
Carrier-to-Noise Density Ratio
CCITT
International Telephone and Telegraph Consultative Committee
CDMA
Code Division Multiple Access
CH
Channel
CHNL
Channel
CIC
Common Interface Circuit
CL
Carrier Loss
CLK
Clock
CLNA
C-band LNA
CLR
Clear
CMOS
Complementary Metal Oxide Semiconductor
Coax
Coaxial
Codec
Coder/Decoder
COM
Common
CPFSK
Continuous-Phase Frequency Shift Keying
CPSK
Coherent Phase Shift Keying
CPU
Central Processing Unit
cr
Carriage Return
CRC
Cyclic Redundancy Check
CRT
Cathode Ray Tube
CS
Clear to Send
CSC
Comstream Compatible
CSMA
Carrier Sense Multiple Access
CTS
Clear to Send
CU
Channel Unit
CW
Continuous Wave
D&I
Drop and Insert
D/A
Digital-to-Analog
D/C
Down Converter
DAC
Digital-to-Analog Converter
DAMA
Demand Assignment Multiple Access
dB
Decibels
dB/Hz
Decibels/Hertz (unit of carrier-to-noise density ratio)
dBc
Decibels referred to carrier
dBm
Decibels referred to 1.0 milliwatt
dBm0
The signal magnitude in dBm referenced to the nominal level at that
point
DBS
Direct Broadcast Satellite
dBW
Decibels referred to 1.0 watt
DC
Direct Current
DCE
Data Circuit Terminating Equipment
DCPSK
Differentially Coherent Phase Shift Keying
DDO
Drop Data Output
DDS
Direct Digital Synthesis
Demod
Demodulator
DEMUX
Demultiplexer
DET
Detector
DOD
Department of Defense
DM
Data Mode
DPCM
Differential Pulse Code Modulation
DPSK
Differential Phase Shift Keying
DSP
Digital Signal Processing
DSR
Data Signal Rate
SDM-9000 Satellite Modem
Rev. 4
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