Comtech EF Data DD2401 - Manual (Page 96)

DD2401 Satellite Demodulator Glossary
MN-DD2401 - Rev. G G- 4
N
NC Normally Closed
NO Normally Open
ns Nanoseconds
NVRAM Non-Volatile Random Access Memory
N/C No Connection or Not Connected
O
OQPSK Offset Quadrature Phase Shift Keying
P
PC Personal Computer
PLL Phase Locked Loop
ppm Parts per Million
P/N Part Number
Q
QAM Quadrature Amplitude Modulation
QPSK Quadrature Phase Shift Keying
R
RAM Random Access Memory
RF Radio Frequency
ROM Read Only Memory
rms Root Mean Square
RU Rack Unit. 1 RU = 1.75”
Rx Receive (Receiver)
RxD Receive Data
R-S Reed-Solomon Coding. Reed-Solomon codes are block-based error correcting
codes with a wide range of applications in digital communications and storage.
S
SEQ Sequential
SYNC Synchronize