C-2 Glossary Glossary of Terms
C-8 PN: 10580-00252 Rev. K Site Master User Guide
DVB-S : Digital Video Broadcasting-Satellite (DVB-S) is the original Digital
Video Broadcasting (DVB) forward error coding and modulation
standard for satellite television and dates from 1995. It is used via
satellites serving every continent of the world. DVB-S is used in both
MCPC and SCPC modes for broadcast network feeds, as well as for
direct broadcast satellite services like Sky TV (UK) via Astra in Europe,
Dish Network in the U.S., and Bell ExpressVu in Canada. The
transport stream delivered by DVB-S is mandated as MPEG-2.
DVB-T : Digital Video Broadcasting - Terrestrial (DVB-T) is the DVB European
consortium standard for the broadcast transmission of digital
terrestrial television. This system transmits a compressed digital
audio/video stream, using OFDMmodulation with concatenated channel
coding (COFDM). The adopted source coding methods are MPEG-2 and,
more recently, H.264.
FFT : Fast Fourier Transform (FFT) is an efficient algorithm to compute the
Discrete Fourier transform (DFT) and its inverse. FFTs are of great
importance to a wide variety of applications, from digital signal
processing to solving partial differential equations to algorithms for
quickly multiplying large integers.
Flash Memory : Flash memory is a non-volatile solid state storage device that is
packaged as a chip. It can be electrically erased and reprogrammed. It is
primarily used in memory cards, USB flash drives, MP3 players, and
solid-state drives for general storage and transfer of data between
computers and other digital products. It is a specific type of EEPROM
(electrically erasable programmable read-only memory) that is erased
and programmed in large blocks.
FM : Frequency Modulation (FM) is a form of angle modulation in which the
instantaneous frequency of a sine-wave carrier is caused to depart from
the carrier frequency by an amount proportional to the instantaneous
value of the modulating wave. In FM, signals of different frequencies
represent different data values.
FM Modulation
Index : In FM modulated systems, the FM Modulation Index is the ratio of the
peak frequency deviation to the maximum modulating frequency. The
higher the index, the greater the received quality. M Modulation Index
= (peak frequency deviation / maximum modulation frequency)
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