TechniSat DigiCorder S2 - Manual (Page 99)

11 Technical terms
Antenna cable:
Cable connection between the modulator of the satellite
receiver and the antenna input of the television set. Used as
an alternative where no SCART socket is available
External unit or installation:
Description used for the entire system of components located
outdoors, consisting of the parabolic/offset dish as well as
one or more LNBs used to receive signals from one or seve-
ral satellites
AV: see SCART
Data compression/MPEG1/MPEG2:
To transmit the current television standard (625 lines and 50
Hz image refreshing frequency), one arrives at a digital data
volume of 216 MBit/s.
This would require bandwidth that is not available for either
terrestrial or satellite transmission. Therefore, the data is
reduced to decrease the volume of data. For Europe, MPEG-
2 has been determined as the international standard for data
compression. MPEG2 is an expansion of MPEG1
DiSEqC:
Digital Satellite Equipment Control: a digital controlling/swit-
ching signal for controlling DiSEqC-compatible components
of the external installation via the antenna cable. An example
of how an installation consisting of DiSEqC components
could be constructed is shown in (Fig. 11-1).
DVB:
Digital Video Broadcasting: a universal digital broadcasting
technology suitable for pictures, graphics, sound and text,
thus for data in any shape or form, and in all possible levels
of quality, always appropriate for the content.
Frequency:
Physical measurement, indicates the number of oscillations
per second. The unit of measurement is the Hertz (Hz)
Unit
Description Oscillations per second
1 Hz 1 Hertz 1
1 kHz 1 Kilohertz 1.000
1 MHz 1 Megahertz 1.000.000
1 GHz 1 Gigahertz 1.000.000.000
Frequency range:
a) Satellite resp. LNB:
11 GHz range from 10,70 GHz - 11,70 GHz, 12 GHz range
fromn 11,70 GHz - 12,75 GHz
b) Receiver: Intermediate frequency, or 1. IF 950 to 2150
MHz
Co-axial cable:
Connection cable between LNB and satellite receiver, to
transmit the signals received, and to provide electrical current
to the LNBs.
99
(Fig. 11-1)
A B
Position
output
A B
Position
output
A B
Option
output
Example:
BED_ANL_DIGICORDER_S2_28/03.QXD 30.03.2006 11:38 Uhr Seite 99