Forward Error Correction (FEC)
A system of error control for data transmission.
PID(Packet Identifier)
A set of numbers that identifies transport stream packets containing data
from a single data stream.
Polarization
Polarizations allows several programmers to be fit into the same frequency
band. The signals from a satellite are transmitted either with linear (vertical or
horizontal) polarizations or circular (right or left) polarizations.
QPSK(Quaternary Phase Shift Keying)
Phase-shift keying in which four different phase angles are used.
Transponder
An automatic device that receives, amplifies and retransmits a signal on a
different frequency.
Symbol rate
Speed of the digital transmission
RGB
Red, Green, Blue. Color signals are routed in separate cables in order to provide a
high quality TV picture.
Scrambled TV programmer
Some TV programmers are transmitted in scrambled form.
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