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Glossary
g–4
LNA
Low Noise Amplifier
LO
Local Oscillator
LSB
Least Significant Bit
LSI
Large Scale Integration (semiconductors)
m
-3
mille (10
)
M&C
Monitor and Control
mA
Milliamperes
Max
Maximum
Mbit/s
Megabits per second
MC
Monitor and Control
MFS
Multiframe Sync
MHz
Megahertz (10
Min
Minimum or Minute
Mod
Modulator
MOP
Modulated Output Power
MPC
Microprocessor Controller
ms
Millisecond (10
Ms/s
Megasymbols per second
MSB
Most Significant Bit
MUX
Multiplexer
-9
n
nano (10
)
N/A
Not Applicable
NACK
Negative Acknowledgment
NC
No Connection or Normally Closed
NO
Normally Open
NRZ
Non-Return to Zero (code)
ns
Nanosecond (10
OQPSK
Offset Quadrature Phase Shift Keying
OSC
Oscillator
p
-12
pico (10
)
P-P
Peak-to-Peak
P/AR
Peak to Average Ratio
PAL
Programmable Array Logic
PC
Printed Circuit
PCB
Printed Circuit Board
PCM
Pulse Code Modulation
PECL
Positive Emitter Coupled Logic
pF
PicoFarads (10
PK
Peak
PLL
Phase-Locked Loop
PN
Pseudo-Noise
PPM
Parts Per Million
PS
Power Supply
PSK
Phase Shift Keying
PWB
Printed Wiring Board
PWR
Power
QAM
Quadrature Amplitude Modulation
QPSK
Quadrature Phase Shift Keying
RAM
Random Access Memory
RD
Receive Data
REF
Reference
RF
Radio Frequency
RLSD
Receive Line Signal Detect
RMA
Return Material Authorization
ROM
Read-Only Memory
RR
Receiver Ready
RS
Ready to Send
6
Hertz)
-3
second)
-9
second)
-12
Farads)
SDM-9000 Satellite Modem
Rev. 4
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