GB 27
AC-3
Multichannel digital audio encoding system.
Access control
A feature that allows parents to ”lock” programmes that they con-
sider unsuitable for children. A ”locked” channel or programme can
only be ”unlocked” with the special 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 receivers and peripheral
equipment using only the existing coaxial cable.
DVB
The Digital Video Broadcast group was created to establish a tech-
nical framework for the introduction of digital video broadcasting
systems.
GHz
The prefix giga means milliard, and Hertz means cycles per second.
Signals in the GHz range are often called microwaves.
LNB (low-noise block converter) or LNBF
An electronic unit mounted on the satellite dish. It receives 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 sec-
ond.
MPEG
Moving Picture Experts Group. Established by the International
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 channel 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 fre-
quency band. The signals from a satellite are transmitted either
with linear (vertical or horizontal) polarisation or circular (right or left)
polarisation.
RCA
Coaxial connector used to connect the Mediamaster to an exter-
nal amplifier.
RF
Radio frequency (known as HF in some countries).
RGB
Red, Green, Blue. Colour signals are routed in separate cables and
provides a high quality TV picture.
SatScan
SatScan is a one-cable positioning system, allowing reception 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.
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.
