bed_anl_DIGITY 1_englisch_4.qxd 21.06.02 13:41 Seite 31
7.6 System configuration
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8 Technical Terms
Antenna cable:
Connecting cable between the modulator of the satellite receiver and the antenna input socket of the TV set; used as an alternative if no SCART socket is available
AV: see SCART
Coaxial cable:
Cable connecting the LNB to the satellite receiver, used to carry the signals received as well as to provide power to the LNB.
Data compression/MPEG1/MPEG2:
In order to transmit the current TV standard (625 lines and an image repeating frequency of 50 Hz), one arrives at a digital data volume of 216 MBit/s. This would require enormous bandwidths not available either with terrestrial nor with satellite broadcast technology. A data compression system is thus employed to reduce the amount of data transmitted. In Europe,
External unit:
Term used for the complete system installed out of doors, consisting of the parabolic/offest dish antenna as well as one or more LNBs, used to receive signals from one or more satelli- tes.
Deemphasis:
Adjustment of the audio frequency band to the broadcast signal, this is determined by the broadcast parameters of the satellite
DiSEqC:
Digital Satellite Equipment Control: a digital switching signal used to control
DVB:
Digital Video Broadcasting: a universal digital broadcast standard used for images, graphics, sound and text, i.e. for data in any form, and in any quality, appropriate to the type of data.
Frequency:
Physical dimension, indicates the waves or oscillations per second, the unit of measurement is Hertz (Hz)
Frequency range: a) Satellite resp. LNB:
11 GHz range from 10,70 GHz to 11,70 GHz, 12 GHz range from 11,70 GHz to 12,75 GHz
b) Receiver: Intermediate frequency or 1.IF 950 to 2150 MHz |
| |||
Unit of frequency | Term | Oscillations p. 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 |
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