TECHNICAL TERMS
Aerial cable:
Connecting cable between the modula- tor of the satellite receiver and the aerial input of the tv, as an alternative if there is no
AV: see SCART
Coaxial cable:
Connecting cable between LNB and satellite receiver, for the transmission of signals received and power supply of the LNB.
Data compression/MPEG1/MPEG2 For the transmission of the present tv- standard (625 lines and 50 Hz image replication frequency) there is a digital data quantity of 216 Mbit/s. This would require band widths which are not avail- able, neither terrestrially nor for satel- lites. Therefore a reduction of the data quantity is made through data reduc- tion. In Europe
Deemphasis:
Adaptation of the audio frequencies to the transmitter signal, determined by the transmission parameters of the sat- ellite.
DiSEqC
Digital Satellite Equipment Control: A digitalt control signal for the control of the
DVB
Digital Video Broadcastning: a digital, universal transmission technique for picture, graphics, sound and text. Also for all kinds of data and in any possible and suitable quality.
Frequency:
Physical quantity, states number of os- cillations per second, measured in Hertz (Hz).
Frequency range:
a)Satellite and LNB, respectively: 11 GHz range from 10,70 GHz to 11,70 GHz
12 GHz range from 11,70 to 12,75 GHz
b)Receiver: IF or 1.MF 950 to 2150
MHz
Frequency unit / Description / Oscilla- tions per second
1 Hz | 1 | Hertz | 1 | |
1 kHz | 1 | Kilohertz | 1.000 Hz | |
1 | MHz | 1 | Megahertz 1.000.000 Hz | |
1 | GHz | 1 | Gigahertz | 1.000.000.000 Hz |
Intermediate Frequency (IF):
The frequency range radiated from the satellite cannot be transmitted through a cable and is therefore converted by the LNB in the IF range from 950 to 2150 MHz. In this way transmission and processing in the receiver is made pos- sible.
1. IF = Intermediate frequency.
LNB/LNC (Low Noise Blockconverter): Receiver unit in the focal point of the dish, converts the frequency range of the satellite to the IF of the receiver.
LOF:
Local oscillator frequency, statement in MHz or GHz, depending on LNB and frequency range received.
Reception frequency of the receiver = the transmitter frenquency of the satel- lite - LOF.
Modulation with 22 KHz
For universal LNB to switch to high fre- quency range.
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