Comtech EF Data SLM-5650A Vipersat Parameter Editor - Manual (Page 66)

A-2 SLM-5650A Parameter Editor User Guide
BPSK Binary Phase Shift Keying – A digital modulation technique in which the
carrier is phase shifted +/-180 degrees (two phases). The most robust of all
PSKs, but unsuitable for high data-rate applications when bandwidth is limited
due to encoding just one bit per symbol.
BUC Block Up Converter – An upconverter so called because it converts a whole
band or “block” of frequencies to a higher band. The IF is converted to final
transmit frequency for satellite communications. The BUC is part of the satellite
ODU/transceiver.
C
C-Band A frequency band commonly used for satellite communications (and sometimes
terrestrial microwave). For terrestrial earth stations, the receive frequency band
is 3.7–4.2 GHz and the transmit band is 5.925–6.425 GHz. See also Ku-band.
CDD Comtech Data Demodulator
CDM Comtech Data Modem
CIR Committed Information Rate – The guaranteed minimum bandwidth assigned
to a remote terminal.
CLI Command Line Interface – A mechanism for interacting with a computer oper-
ating system or software by typing commands to perform specific tasks.
Codecast A network coding based ad hoc multicast protocol well-suited for multimedia
applications with low-loss, low-latency constraints. Because data is streamed
with no verification, high delivery ratios are obtained with very low overhead.
CRC Cyclic Redundancy Check – A method of applying a checksum to a block of
data to determine if any errors occurred during transmission over communica-
tions links.
CXR Carrier – A radio frequency transmission linking points and over which infor-
mation may be carried.
D
DAMA Demand Assigned Multiple Access – A process whereby communications links
are only activated when there is an actual demand.
dBm Decibel referenced to 1 milliwatt.