SMART enigma X5 User Manual page 35

PID(Packet Identifier)
A set of numbers that identifies transport stream packets containing data
from a single data stream.
Polarization
Polarization allows several programs to be fit into the same frequency band.
The signals from a satellite are transmitted either with linear (vertical or
horizontal) polarization or circular (right or left) polarization.
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
RF
Radio frequency (known as HF in some countries).
Scrambled TV programs
Some TV programs are transmitted in scrambled form.
SERIAL RS 232
A serial communication standard data port.
RCA
Coaxial connector used to connect the receiver to an external amplifier.
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