GB 33
AC-3
Multichannel digital audio encoding system.
Access control
A feature that allows parents to ”lock” programmes that
they consider unsuitable for children. A ”locked” chan-
nel or programme can only be ”unlocked” with the spe-
cial access code.
Access code
A four-digit code stored in the Mediamaster. Used to
lock/unlock the Mediamaster.
AGC
Automatic Gain Control.
AUX
Auxiliary.
BER
Bit Error Rate. Signal quality measure.
C/N
Carrier to Noise. Signal quality measure.
DiSEqC
DiSEqC™ (Digital Satellite Equipment Control) system,
which is a communication bus between satellite receiv-
ers and peripheral equipment using only the existing co-
axial cable.
DVB
The Digital Video Broadcast group was created to estab-
lish a technical framework for the introduction of digital
video broadcasting systems.
FEC
Forward Error Correction. Correction of faulty bits in the
received signal.
GHz
The prefix giga means milliard, and Hertz means cycles
per second. Signals in the GHz range are often called mi-
crowaves.
LNB (low-noise block converter) or LNBF
An electronic unit mounted on the satellite dish. It re-
ceives the signals reflected by the dish and converts
them to signals that can be used by the Mediamaster.
MHz
The prefix mega means million, and Hertz means cycles
per second.
MPEG
Moving Picture Experts Group. Established by the Inter-
national Standards Organisation to provide the basis for
a picture coding and compression system.
Network
A number of digital channels transmitted from one
source. Grouped under separate headings in the chan-
nel list.
GLOSSARY OF TERMS
PCM
Pulse Code Modulation. Non-compressed digital audio
format.
PCR
Program Clock Reference.
PID
Packet Identifier.
Polarisation
Polarisation allows several programmes to be fit into the
same frequency band. The signals from a satellite are
transmitted either with linear (vertical or horizontal) po-
larisation or circular (right or left) polarisation.
RCA
Coaxial connector used to connect the Mediamaster to
an external amplifier.
RF
Radio frequency (known as HF in some countries).
RGB
Red, Green, Blue. Colour signals are routed in separate
cables in order to provide a high quality TV picture.
SatScan
SatScan is a one-cable positioning system, allowing re-
ception of 29 preprogrammed different satellite positions
within a range of +/- 60 degrees.
SERIAL RS 232
A serial communication standard data port.
SCART
A 21-pin connector used for connection of the
Mediamaster,VCR and TV. Also named Euroconnector
or Peritel connector.
Scrambled TV programme
Some TV programmes are transmitted in scrambled
form.
SNR
Signal to Noice Ratio. Signal quality measure.
S/PDIF
Sony/Philips Digital Interface Format. Digital audio output.
Symbol rate
Speed of the digital transmission.
SW
Software. Programme code.
TS
Transport stream.
VCR
Video Cassette Recorder.
