LNB/LNC (Low Noise Block converter)
Receiving unit at the focal point of the parabolic dish antenna, converts the signal from the
frequency range of the satellite to the intermediate frequency of the receiver.
LOF:
Local oscillator frequency, measured in MHz or GHz, varies according to the LNB and the
frequency range received.
Receiving frequency of the receiver = transmitting frequency of the satellite - LOF.
Mode:
Determines whether a mono or stereo programme will be received.
Modulation at 22 KHz:
Apart from the 14/28 Volt switching mode, this also serves to switch between 2 LNBs. In uni-
versal LNBs it is used to switch into the High range.
Modulator:
Switch in a satellite receiver or a video recorder that is used to connect the TV set by means
of an antenna cable.
Multyfeed
External unit consisting of a parabolic dish antenna as well as several LNBs, suitable for
receiving signals from several satellites.
Operational voltage:
The LNBs are supplied with power by means of the coaxial cable. In order to provide this,
the receiver must supply power at 14 or 18 volt.
Parabolic dish (antenna):
A reflector of metal or coated plastic, shaped in a parabolic form, used to focus the electro-
magentic waves broadcast by a satellite in a focal point.
Polarisation plane:
In order to better utilise the available frequency range, satellites will transmit neighbouring
programmes with opposite polarisation (horizontal and vertical, or dextro-rotatory and laevo-
rotatory). In order to receive both polarisation planes, either two single LNBs or one V/H LNB
are required.
Receiver: see Satellite receiver
Satellite:
Description of a satellite usually includes its name as well as its orbital position.
ASTRA
19° East
EUTELSAT
13° East
Satellite Receiver:
The signals received and modulated by the LNB cannot be processed by the TV set. The
receiver alters the frequency of these signals so that usable audio and video signals (AV) are
generated at its outputs, which are transmitted to the TV set.
SCART:
Type of connector used in conjunction with TV sets, video players, satellite receivers and
other electronic equipment in order to transmit audio and video signals (AV).
Software update:
Digital television is a new medium, which offers improved sound and image quality as well as
the facility to utilise interactive services. These new services are constantly being developed
and improved by providers. In order to use these services optimally, it may be necessary to
update the software of your receiver occasionally.
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