Bedienungsanleitung Kathrein UFS 940sw (Seite 126 von 132) (Englisch)

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Short Technical Guide

AC 3

Output for Dolby Digital signal

ASTRA

SES (Société Européene des Satellites) satellite

system. Analogue and digital transponders in the

frequency range 10.7-12.75 GHz.

AV programme pos.

Preferred programme slot on TV set for external

connections (such as HDMI)

CAM – Conditional Access Module

Decryption decoder, which uses a smart card

to decrypt the encrypted radio and TV signals.

Channel package

The channel package for a digital transponder

normally includes several TV and radio

channels. Each channel package has a ﬁ xed

assignment for the transponder transmission

frequency, for polarisation (horizontal or vertical),

for the symbol rate and for the Viterbi rate

or error rate.

CI - Common Interface

Internationally standardised interface for CA

modules

Conditional Access (CA) system

Controls user access to services and

programmes which are encrypted for reasons of

Data rate

Data bits transmitted per second. Is expressed

in kbit/s or Mbit/s. The higher the data rate the

better the quality of the transmitted signal.

Data reduction

Compression of video and audio signals.

Redundant information is discarded.

DiSEqC™

DiSEqC™ (Digital Satellite Equipment Control)

is a communication system between a satellite

receiver (master) and the peripheral satellite

components (slaves), such as LNBs, multi-

switches, rotating antenna systems.

It is a single master/multi-slave system, i.e. there

is only ever one master in the satellite system.

All activities start from the master.

DiSEqC™ components

If DiSEqC™ switching matrices are cascaded,

the master receiver must transmit the DiSEqC™

signal several times, so that all DiSEqC™ multi-

switches in the cascade receive their commands.

These days, DiSEqC™ components (slaves)

must be downward compatible, i.e. respond to

the analogue switching criteria from receivers that

are only equipped with H/V and 22 kHz control

signals.

A DiSEqC™ switching matrix will work with

analogue switching criteria until the DiSEqC™

command from the master is received.

All analogue switching criteria are then ignored.

Dolby Digital 5.1

Dolby Digital is a sound transmission that allows

digital surround sound to be output on a home

cinema system.

DVB - Digital Video Broadcasting

DVB-S refers to the transmission method

(S = satellite, C = cable, T = terrestrial).

DVB-S2

An enhanced DVB-S signal for HDTV with better

quality.

Eb/No ratio

The Eb/No ratio is a measure of the signal to noise

ratio of a digital signal. The value is not identical

to the C/N value familiar from analogue reception

technology. At Eb/No values below 5 dB no

reception is normally possible.

EUTELSAT

European Satellite operator, based in Paris.

Many orbit positions and European customers.

Transponders in the frequency range

10.7-12.75 GHz.

FEC

FEC is the abbreviation for Forward Error

Correction. A technique for reducing the error

rate of data transmission. Additional bits are

inserted into the data stream, so that error-

correction algorithms can be used on reception.

The FEC error rate corresponds to the

Viterbi rate.

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