ab CryptoBox 652HD Combo, User Manual

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! MHz
The prefix mega means million, and Hertz means cycles per second.
! MPEG
Moving Picture Experts Group. Established by the International Standards
Organization to provide the basis for a picture coding and compression
system.
!
Forward Error Correction(FEC)
A system of error control for data transmission.
! Polarization
Polarization 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) 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.
! Scrambled TV programmer
Some TV programmer are transmitted in scrambled form.