Technical Terms - TechniSat DigitMod S1 Operating Manual

Example:
A B A
Position Position
Output Output
A B
Option
Output

10 Technical terms

Antenna cable:
Connecting cable between the modulator of the satellite receiver and
the antenna input of the television set, used as an alternative if no
SCART socket is available.
AV: see SCART
Coaxial cable:
Connection cable between LNC and satellite receiver,used to trans-
mit the signals received, and to supply current to the LNC.
Data compression/MPEG1/MPEG2:
The volume of data involved in transmitting the current television
standard (625 lines, and a picture frequency of 50 Hz results in a
figure of 216 MBit/s of digital data.
This would require bandwidths that can currently not provided, whet-
her by satellites nor by terrestrial systems. For this reason, the total
volume of data transmitted is reduced by means of a compression
algorithm. For Europe, MPEG-2 has been accepted as the internatio-
nal standard for data compression. MPEG-2 is an expanded version
of MPEG-1.
B
DiSEqC:
Digital Satellite Equipment Control: A digital switching signal used to
control DiSEqC-compatible components of the external installation
via the antenna cable. An example of an installation consisting of
DiSEqC components can be seen in (Fig. 10-1).
DVB:
Digital Video Broadcasting: A universal digital transmission
technology used for pictures, graphics, sound and text, i.e.
for data in any shape or form, and in any possible, always
appropriate quality.
External unit (installation):
Description applied to the entire system located outdoors,
consisting of the parabolic/offset dish as well as one or more
LNCs, used to receive signals from one or more satellites.
Frequency:
Physical measurement, indicates the number of cycles or
oscillations per second, the unit of measurement is the Hertz
(Hz).
Frequency range:
a) Satellite, respectively LNC:
11 GHz range from 10,70 GHz - 11,70 GHz, 12 GHz range
from 11,70 GHz - 12,75 GHz
b) Receiver: Intermediate frequency or 1.IF 950 to 2150 MHz
Unit
1 Hz
1 kHz
1 MHz
1 GHz
Description Cycles per second
1 Hertz 1
1 Kilohertz 1.000
1 Megahertz 1.000.000
1 Gigahertz 1.000.000.000
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