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be decrypted only by using the appropriate
Smartcard. As a rule these services are
subscription-only.
PID
The PID (Packet IDenti
fi
cation) number is an
identi
fi
cation number for video signals and audio
signals in the digital data stream of DVB-MPEG-2
signals. The receiver uses the PID number to
create a unique assignment for the video and
audio data transmission. The PCR PID is the
identi
fi
cation number for the synchronisation
signal. The PID-PCR is normally identical to
the video PID. For programmes broadcast
in multiple languages, the audio PID can be
entered manually to assign a different language
to the TV programme. After the PID is entered,
the digital receiver automatically selects the
audio data identi
fi
ed by the PID number from
the data stream and assigns it to the video signal.
PIN
Personal Identi
fi
cation Number. For this unit
the PIN is a four-digit numeric code which must
be entered to unlock the unit to allow access to
certain functions and channels.
Polarisation
The individual transponders on satellites transmit
on two different (polarisation) planes (horizontal
and vertical). As a result the capacity of the
transponder is increased.
QPSK – Quadrature Phase Shift Keying
Digital modulation process that is used for satellite
transmission (8PSK is also used in connection
with HDTV).
Receivers
Receiver
RGB
Video signal made up of three individual colour
signals (red, green, blue)
SAT IF signal
Receiver input signal, satellite intermediate
frequency.
Scart cable
21-pin connecting cable (e.g. receiver/TV).
SCR single cable system - Satellite Channel
Router
The single-cable system is used to distribute
digital Sat IF signals (including HDTV) and
terrestrial signals over one cable to up to eight
receivers. There is no limit on the variety of
channels, i.e. the complete range of channels
from one or two satellites is transmitted.
Switching and the transponder selection are
undertaken in the feed system or in the matrix
and are controlled by the receiver using a special
DiSEqC™ command to EN 50494. Each receiver
is allocated a
fi
xed subscriber frequency via
which it receives its channels. A twin receiver
requires two such subscriber frequencies.
The transponder selection and conversion
to the subscriber frequencies is undertaken
using special tuner modules, so-called SCR
(Satellite Channel Router), that are installed
in the feed system or in the matrix.
The Kathrein single-cable system satis
fi
es
the single-cable standard in accordance with
EN 50494, i.e. all the components of a single-
cable system that satisfy this standard can be
installed in a satellite system.
Smart card
Card from Pay TV provider to decrypt its channels
Stand-by
Standby mode
Standard gateway
Is used as an interface between two networks or
computers that are linked via a router. As a result
it is possible to transmit data.
Streaming
Transmission of data (recordings) in real time
Subnet Mask
De
fi
nes an IP address range in a subnet (small
independent network).
Symbol Rate
The symbol rate describes the quantity of data
that is transmitted per second. The symbol rate
is measured in MSymbols/s and is equal to the
number of symbols received per second.
Timeshift function
Time shifted playback
Brief technical glossary
