LNBs (or Low-Noise Down-Converters) work with a satellite dish. Together, they receive signals that a parabolic antenna sends. Together, they deliver television programmes to paying subscribers.
While many are familiar with a satellite dish, the same number of people has no idea what LNBs in satellite broadcasting services are. They know those things exist. What do they do exactly, though?
Location & Basic Uses
Do you know where you can find LNBs? First, look around the satellite dish. The device in the front portion is an LNB.
An LNB is positioned in front of a satellite dish because it lets a dish work better — much better. A satellite dish is the one that receives microwave signals and an LNB amplifies these signals. Without an LNB, signals would be difficult for an indoor receiver to process.
Low Noise Temperature = Better Quality
An LNB controls the quality of the signals received during the first stages. Particularly, it helps with the measurement of Noise Temperature. You can also refer to Noise Temperature as Noise Factor or Noise Figure. The Noise Temperature should be controlled for noise quality to improve. When the Noise Temperature is low, the quality of the signals is much better. This means 200K Noise Temperature is twice as good as 400K Noise Temperature.
The Role of a Block
The word “block” in an LNB is about the conversion to microwave frequencies. Particularly, the word refers to block conversion, as the satellite is down-converted. As satellites mainly broadcast along the range 4-12-21 GHz, you need to down-convert a satellite to microwave frequencies that fit the usual range.
You would notice that modern LNBs are digi-ready. This means that the design of an LNB is made strategically to facilitate in the reception of signals. This also means that because digital TV carriers are becoming popular, an LNB is now created mostly to support these carriers.
By knowing more about LNBs and satellite broadcasting services, you have a better knowledge of how technology works in terms of sending information.