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GLOSSARY OF TERMS
AC-3
Multichannel digital audio encoding system.
Access
Authorisation to use the coding system to purchase / or-
der TV programmes.
Access code
A four-digit code stored in the Mediamaster. Used to
lock/unlock the Mediamaster.
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.
AGC
Automatic Gain Control.
BER
Bit Error Rate. Signal quality measure.
C/N
Carrier to Noise. Signal quality measure
DVB
The Digital Video Broadcast group was created to estab-
lish a technical 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 mi-
crowaves.
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.
PCM
Pulse Code Modulation. Non-compressed digital audio
format.
GB 32
PCR
Program Clock Reference.
PID
Packet Identifier.
PIN code
Personal Identification Number. A four-digit code stored
in the smart card. For PPV (Pay Per View) or other serv-
ices together with the subscription.
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.
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.
Service provider
Is a company that collects a number of programmes/serv-
ices and distributes them to customers.
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.

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