The installer will need to physically align it with a geosynchronous satellite so that it can receive the signal. They come in lots of different sizes. As there are lots of different sizes of stationary satellite dishes available, you can choose one that picks up the right amount of signal for you. The larger the dish, the greater number of signals it can pick up, so speak to an installer to find out what size dish you need. Stationary dishes can only pick up satellites that are close together without being manually adjusted, so you will need to check with your installer to see if this will be a problem.
Motorised dishes, like the name suggests, have a motor inside that allows them to move and pick up different satellite signals. Most receivers can use motorised dishes, so they are a potential option for most homes.
Since the dish can rotate to pick up different signals, you can access thousands of channels. About one thousand of those channels are free from Freesat! A satellite dish is just a special kind of antenna designed to focus on a specific broadcast source. The standard dish consists of a parabolic bowl-shaped surface and a central feed horn. To transmit a signal, a controller sends it through the horn, and the dish focuses the signal into a relatively narrow beam.
The dish on the receiving end can't transmit information; it can only receive it. The receiving dish works in the exact opposite way of the transmitter. When a beam hits the curved dish, the parabola shape reflects the radio signal inward onto a particular point, just like a concave mirror focuses light onto a particular point.
In this case, the point is the dish's feed horn, which passes the signal on to the receiving equipment. In an ideal setup, there aren't any major obstacles between the satellite and the dish, so the dish receives a clear signal.
In some systems, the dish needs to pick up signals from two or more satellites at the same time. The satellites may be close enough together that a regular dish with a single horn can pick up signals from both. These are really not that common, as it makes as much sense if upgrading an LNB from a single to provide extra satellite connections or installing a satellite dish for the first time to just install a Quad LNB instead as this will future proof the installation further and allow for an additional two connections.
Instead a new approach must be adopted. See our previous blog on how many TV's can be fed off one dish. This is perfect for when people wish to cancel their Sky subscriptions as they can continue to receive Freesat through the same satellite dish. Adapter holders can be purchased to accept a 40mm collar but it is just one more thing to order in or keep in stock, so I advise ordering the correct LNB to begin with. One cable is connected to a vertical output and the other a horizontal output.
There is not switching of the LNB between horizontal and polarised signals as both the cables are carrying different services. This means when using a Sky Q wideband LNB that the Sky Q box must be connected with two cables must be connected to receive all the services and channels.
There are ways of connecting a Sky Q box with a single cable as I mention later on the blog. For the sharpest among you may be wondering how come all the same services can be fitted onto the two cables without the need for a high and low band oscillator?
This however does present big problems with diplexed TV and satellite systems and communal IRS systems as the Sky Q and TV aerial signals can no longer be combined onto the same cable. The latter meaning that if you need to make sure that the cables that feed each satellite receiver corroborate with the connections on the LNB otherwise it will not work.
There is not switching on the LNB again, it instead looks for the frequency of the transponder for the channel that the satellite receiver has requested and oscillates it to the lowest available frequency. For this reason, a new approach must be adopted, and this is done via a Quattro LNB and multi-switch amplifiers. It must be connected to a multi-switch amplifier with separate VL, VH, HL and HH inputs where the switching instead takes place and the cables must not be mixed from the LNB and the input of the amplifier.
By using this concept only four cables need to be installed between the satellite dish and multi-switch amplifier concept can be extended to serve hundreds of satellite TV points.
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