User’s Guide 6-2
DiSEqC Digital Equipment Satellite Control device that connects the receiver and other equip-
ment in a satellite receiving system, using coaxial cable to transmit signals to each com-
ponent.
Dish The satellite antenna. It is a parabolic surface which reflects the received signal towards
the converter. The larger the dish, the better the signal quality.
Downlink Signal path from satellite transponder to Earth.
Dual band Converter which is able to receive two different frequency bands.
Dual pole “Marconi” converter which receives both polarities (horizontal and vertical). Users
select polarities by means of a voltage change (13/18 Volt).
DVB (Digital Video
Broadcasting)
The digital broadcasting standard for Europe, based on MPEG-2. Developed by an inter-
national consortium, it is available for three modes of signal transmission: DVB-S for
satellite, DVB-C for cable TV and DVB-T for terrestrial broadcasting.
DVB MPEG transport stream Formatted signal that reaches your antenna from the transmitter. The signal is made up
of 188-byte packets containing MPEG information for network and TV broadcasts.
Encryption Scheme for scrambling subscriber television or radio.
EPG (Electronic
Program Guide)
An on-screen listing that lets digital television watchers see information such as time,
channel, and content for current and upcoming programs.
FEC (Forward Error
Correction)
Bits added to transmitted data to check transmission errors and allow their correction at
the receiver side. It is written as a fraction: the lower the value (e.g. 2/3 instead of 5/6),
the higher the percentage of extra transmitted bits.
Feed Antenna dish component which aims the signal reflected by the dish towards the LNB.
Footprint Geographical area covered by the satellite or transponder signal.
GEO Geo-stationary Earth Orbit, 36,000 km above the equator. Satellites at this altitude have
the same angular rotation velocity as the Earth, meaning their signal can be received
continuously at fixed points on the ground.
Geo-stationary orbit See GEO.
Hardware acceleration The use of a device on a graphics card called a graphics accelerator. With hardware
acceleration enabled, the graphics card's driver software sends all tasks to the PC's CPU.
The CPU then directs the graphics accelerator to perform graphics-intensive tasks such
as shading, texturing et cetera. If disabled, the PC's CPU does these tasks alone.
Intermediate frequency Frequency band originated from LNB that the receiver can tune. The typical band is
950-2,150 MHz.
ISP Internet Service Provider.
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