TechniSat MultyFocus operating instructions Lof, Osd

*M-Focus 2.6.95 14.12.1999 10:39 Uhr Seite 44

Coax cable:

Cable connection between the LNB and satellite receiver which is used to transfer the received signals and for the power supply of the LNB.

LNB (Low Noise Block Converter):

Receiving unit centred in the focus of the paraboloidal reflector. It converts the frequency range of the satellite into the intermediate frequency of the receiver.

LOF:
Local Oscillator Frequency; specified in MHz or GHz, depending on the LNB and the received frequency range.
Receive frequency of the receiver = Broadcast frequency of satellite - LOF
Correlation between frequency range and LOF:
11 GHz range	LOF 9.75 or 10 GHz
DBS range	LOF 10.75 GHz
12.5 GHz range	LOF 10.75 or 11.475 GHz

Modulation at 22 kHz:

Additional control signal, e.g. for an external switching device used to toggle between two LNBs.

Modulator

Electronic circuit in the satellite receiver or video recorder which is used to connect to a television via antenna cable.

Mode:

determines if a channel is received in mono or stereo quality.

Multyfeed:

Outdoor unit consisting of a paraboloidal reflector and multiple LNBs for the reception of multiple satellites.

OSD:

„On-Screen Display“; alphanumeric representation of information on the TV scree Offset reflector

Special type of paraboloidal reflector which is primarily used for small to medium-sized reflectors.

Paraboloidal reflector:

Reflector of paraboloidal shape made of metal or plastic-coated which is used to focus the electromagnetic waves which are broadcast by a satellite.

Polarisation level:

For an efficient use of the available frequency range satellites broadcast adjacent channels with opposite polarities (alternately horizontal and vertical, or left-moving and right-moving). The reception of both polarisation levels requires two single LNBs or a V/H LNB.

Polarizer

An equipment which is used to switch the polarisation levels by means of an actuator motor drive (mechanical) or through a direct current (ferrite or magnetic). This allows the reception of both polarisation levels over a single LNB.

Radio channels:

Apart from the television channels, satellites also broadcast radio channels which are transported on subcarriers. In addition to the subcarrier’s frequency further parameters have to be set:

Audio bandwidth, Deemphasis, and Mode.

Receiver:

See satellite receiver.

Satellite:

Name and position of the satellite relative to the orbit, e.g.:

Name: Eutelsat	Position: 13° East	or	-13°
Telecom 2B	5° West	or	+5°

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