Technisat UNYSAT-Universal-Twin-LNB

Signal converter for two-party operation
This signal converter is equipped with two independent connections and can be used in two-party mode to receive all analog and digital TV, radio and multimedia ranges broadcast via satellite. Since the entire frequency spectrum of satellite reception is available at each of the two outputs either two receivers (e.g. receiver or TV PC card) or a twin receiver can be connected directly to the output sockets.

This twin LNB only allows pure two-party reception. An extension of the receiving unit with multi-switches is not planned. In order to integrate more than two participants, the use of a Quatro or Quatro Switch LNB is recommended.


Function of the LNB
The LNB (Low Noise Block Converter or low-noise signal converter) is the receiving electronics that are attached to the AZ / EL bracket (the feed arm) of the satellite dish. Its job is to amplify the high-frequency signals picked up by the satellite dish and convert them to lower frequencies. During this process, the input frequency range of the LNB is mixed with a local oscillator frequency (LOF) and reduced to the so-called Sat intermediate frequency (Sat-IF). The satellite intermediate frequency is synonymous with the output frequency range of the LNB and corresponds to the difference between the input frequency and the LOF. Only through this transformation can the information sent be transmitted to the receiver via the coaxial cable with little loss.

Signal processing (frequency band, polarization, satellite block)
The frequency range between 10.70 and 12.75 GHz is used for program reception via satellite. However, since this frequency spectrum cannot be converted into the Sat IF in one step, the frequency range is divided into a lower and an upper frequency band (low band and high band). In order to accommodate as many transmitters as possible within these two frequency bands, the signals are emitted in a horizontally or vertically polarized plane. This means that frequencies can be used twice.
The combination of frequency band and polarization plane is called a satellite block. Usually four satellite blocks are broadcast by a satellite (horizontal low band, vertical low band, horizontal high band and vertical high band).

Universal LNBs now cover the entire frequency range of satellite reception. You are able to implement the four satellite blocks and process the analog as well as the digital signal.

Switching criteria
The conversion of the two frequency bands as well as the conversion of the polarization planes is carried out separately. Switching between the polarization levels takes place via the different levels of the LNB supply voltage (14 volts for the vertical or 18 volts for the horizontal level). The upper frequency band, on the other hand, is controlled via a 22 KHz signal that is superimposed on the LNB supply voltage.

Weather protection
The powerful UNYSAT universal twin LNB is reliably protected from the effects of the weather by a robust weatherproof housing. The housing is simply plugged onto the AZ / EL bracket and fixed with a screw. A retaining clip is not required for fastening.
The connection of the coaxial cables can also be carried out effortlessly. All you have to do is remove the lower part of the housing so that the connection area of the LNB is exposed.


Installation example: two-party reception

Two receivers are to be supplied with the TV and radio signals from a satellite position.

The following materials are essentially required for this: An outdoor system (consisting of a satellite dish with AZ / EL bracket and a universal twin LNB - preferably with a weatherproof housing), two satellite receivers, two antenna sockets and the corresponding cable sections with the associated F-connectors.