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TechniSat: UNYSAT Quatro-Switch-LNB - Downloads and Information - Service | EN

Downloads and Information
Downloads and Information

UNYSAT Quatro-Switch-LNB

( 0000/8980 )

Signal converter for use with multiple participants The Quattro Switch LNB is a universal LNB for use by multiple participants, and is capable of receiving all digital and analogue TV, radio and multi-media signals broadcast via satellite. The integrated multi-switch facilitates direct connection of up to four reception units (e.g. four digital receivers). However this LNB is not designed for expansion to a larger number of receivers by means of additional external multi-switches. The TechniSat UNYSAT Quattro Switch LNB is a cost-effective option for realising a reception installation for a maximum of four participants. Function of the LNB The LNB (Low Noise Block Converter resp. signal converter) is the electronic component that receives the signal, and is attached to the AZ/EL mount, or feed arm, on the satellite dish. Its function is to amplify the high-frequency signals received by the antenna, and to convert these into lower frequencies. The process involves combining the input frequency range of the LNB with a Local Oscillator Frequency (LOF), and bringing it down to the so-called satellite intermediate frequency or satellite IF. The satellite intermediate frequency is identical to the output frequency range of the LNB, and can be calculated as the difference between the input frequency and the LOF. It is this transformation that makes it possible to pass on the information transmitted and received via the co-axial cable to the receiver with a minimum of loss. Signal processing (frequency band, polarisation, satellite block) The frequency range between 10.70 and 12.75 GHz is utilised for the reception of programmes via satellite. However, this frequency range cannot be converted to the satellite IF in a single step, therefore the frequency range is divided into an upper and a lower frequency band, known as low band and high band. In order to be able to handle a maximum number of channels within these two frequency bands, signals are transmitted in both a horizontal and a vertical polarised plane. This means that each frequency can be used for two separate channels. The combination of frequency band and polarisation plane is referred to as a satellite block. Generally speaking, four satellite blocks will be broadcast from the satellite: horizontal low band, vertical low band, horizontal high band and vertical high band. Universal LNBs cover the entire frequency range involved in satellite reception. They are able to convert all four satellite blocks, and to process both analogue and digital signals. Switching criteria Both the conversion of the two frequency bands and the conversion of the polarisation planes are effected separately. Switching between polarisation planes takes place by means of a variation in the voltage of the current supplied to the LNB (14 Volts for the vertical resp. 18 Volts for the horizontal plane). On the other hand, the upper frequency band is controlled via a 22 KHz signal that is superimposed on the LNB power supply current. Weatherproofing The TechniSat UNYSAT Quattro Switch LNB is a powerful reception unit that is reliably protected from the influences of weather by a robust weatherproof housing. The housing is simply slipped onto the AZ/EL mount, and fixed in position with a single screw. No additional bracket is required for this. Attaching the co-axial cable is also child?s play. All you need to do is to remove the lower section of the weatherproof housing, this will expose the connections provided on the LNB. Installation example for reception by four participants In this example, the TV and radio signals of a single satellite position are to be provided to four receivers. The basic requirements are an external installation (consisting of a satellite dish antenna with an AZ/EL mount and a Universal Quattro Switch LNB - preferably one with a weatherproof housing) as well as four satellite receivers, four antenna sockets, as well as the appropriate lengths of cable and corresponding F-connectors.

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