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Brief technical glossary
8PSK (8 Phase Shift Keying)
Digital modulation process used for HDTV
satellite transmission.
AC 3
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 channel slot
A preferred channel slot on the TV set for
external connections such as Scart and
HDMI
CAM – Conditional Access Module
Decryption decoder, which uses a smartcard
to decrypt the encrypted radio and
TV signals.
CEC
Consumer Electronics Control. In this way
the receiver can handle functions of the
TV set and vice versa.
With Kathrein receivers the TV set can be
switched on and off by the receiver.
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
CI modules
CI+ - Common Interface
Further development of CI for CI+ modules
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.
DHCP
Dynamic Host Confi guration Protocol.
This features permits automatic integration
into a network.
Automatic assignment of the IP address,
subnet mask, standard gateway and
DNS Server. As a result these parameters
do not need to be entered in a network in
conjunction with a router.
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.