10 technical terms – TechniSat MultyFocus User Manual
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10 Technical terms
Actuator
Motor with gears and push bars to drive medium to large-sized
paraboloidal reflectors
Antenna cable
Cable connection between modulator and satellite receiver and
antenna input of the television set, may be used alternatively when
there is no SCART connector attached.
Audio bandwidth:
Option that separates two subcarriers; it is determined by the
broadcasting parameters of each satellite. An excessive audio
bandwidth results in an interference between the desired subcarrier
and an adjacent subcarrier; a very small bandwidth may lead to
distortions.
Outdoor unit:
Term used to describe the entire system which is mounted outdoors.
It consists of a paraboloidal reflector and one or more LNBs which
are used to receive the broadcasts from one or more satellites.
AV
See SCART
Combysat LNB
LNB used to receive the entire frequency range between 10.7 and
12.75 GHz. The supply voltage is used to switch from the 11 GHz
range (14V) to the DBS/12 GHz range (18V). The polarizer toggles
between the polarisation levels.
DBS:
Direct Broadcasting Satellite; refers to satellites with a very high
broadcasting power in the DBS frequency range, e.g. TDF.
Decoder:
Individual device or electronic circuit incorporated in the satellite
receiver which is used to decode encoded channels (e.g.
Premiere).
Deemphasis:
Adaptation of the audio frequency waveform to the broadcast
signalling; determined by the satellite’s broadcasting parameters.
Single LNB:
LNB used to receive on one polarisation level.
Frequency:
a) Satellite or LNB:
11 GHz range
10.7
to
11.7 GHz
DBS range
11.7
to
12.5 GHz
12.5 GHz range
12.5
to
12.75 GHz
b) Receiver: Intermediate frequency or 1st I F 950 to 2050 MHz
H/H mount
Motor with gears and integrated support mechanism to drive small
to medium-sized paraboloidal reflectors.
Hz:
Frequency unit of measurement
1 Hz
(Hertz)
= 1
vibrations per second
1 kHz
(Kilohertz)
= 1,000
vibrations per second
1 MHz (Megahertz)
= 1,000,000
vibrations per second
1 GHz (Gigahertz)
= 1,000,000,000
vibrations per second
Horizontal polarisation:
See polarisation level
*M-Focus 2.6.95 14.12.1999 10:39 Uhr Seite 43