ComStream CM601, Installation And Operation Manual

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Glossary 3
DTE data terminal equipment – any piece of equipment at which a communications
path begins or ends
DVB
digital video broadcast
E
b
/N
0
energy-per-bit with respect to noise—also known as signal-to-noise level; when
displayed on the remote terminal, E
b
/N
0
is displayed as “Eb/No”
ECU external control unit
ER error – typically followed by a number to signify a specific error message
Eutelsat intergovernmental organization that provides and operates a space segment for
European telecommunications services
FEC
forward error correction
FIFO
first-in-first-out
Framing Unit
ComStream option card that provides all international overhead functions
FRU
field replaceable unit – a modular circuit card containing a microcontroller that
communicates with another on the M&C card; also referred to as an option card or
option module
Gaussian noise
White noise uniform across the entire range of frequencies that is introduced into
a transmission channel from the environment; may interfere with a carrier signal.
Also referred to as background electrical noise. May be abbreviated as WGN
(white Gaussian noise).
GHz gigahertz (10
1
)
GND ground
HDLC high-level data link control
hot-swap process of installing or swapping certain option cards while the CM601 is
powered up; only option cards containing the label Hot Plug/Pull on their filler
plate can be swapped in this manner
HPA high-power amplifier
Hz hertz
I&Q channels in-phase and quadrature-phase channels