Smaller, newer satellite dishes generally use the more compact LNBF’s. Larger, older satellite dishes generally use the older LNB’s that are separate from the feedhorn. This voltage shift causes it to switch back and forth between two different antenna probes (horizontal and vertical) within the LNBF itself. With an LNBF, the polarity changes when the receiver changes the voltage going into it. For this reason, an LNBF can be smaller than an LNB with comparable capabilities.Īs you switch channels, the LNB switches polarity through the use of an exterior motor. An LNBF is a more highly developed piece of technology, being a part of the feedhorn itself. This is the first step in taking the microwave signal coming from space and turning it into images and sounds for televisions and computers.Ī simple LNB attaches to the feedhorn of a satellite dish. As with other signal amplifiers, they take the very faint signal they receive and magnify it so that it is powerful enough to use. LNB’s and LNBF’s are both amplifiers used in satellite dishes. LNBF = Low Noise Block down-converter plus FeedhornĪ Feedhorn is basically a metal funnel that guides the incoming signal to the actual antenna stub inside the throat of the LNB. Multicom stocks Single, Twin, Quad and Octo LNBFs What’s the Difference Between an LNB and a LNBF?įirst of all, let’s explain the terminology: There are other functions, too, but they’re not as important as receiving the signal.
The LNB amplifies that signal and sends it down the cable. The big, round, “dish” part of your dish acts as a lens, focusing as much signal as possible onto the LNB.
Satellite signals are very weak by the time they travel over 22,000 miles to your dish.
Both functions are important in order to deliver a satellite signal through a regular cable. It’s also a block downconverter, meaning it takes the signals on the super-high satellite frequencies and converts them to lower frequencies. (Depending on your satellite TV system, it can also perform other tasks, too.)Īn LNB has two important functions: it’s a low-noise amplifier, meaning that it takes the extremely weak satellite signal and amplifies it. It’s generally referred to as an LNB or sometimes LNBF, which stands for Low-Noise Block downconverter. The only part that contains any electronic components at all is in the front of the metal arm. Most of a satellite dish is just plain metal. Ever wonder what the difference is between an LNB and a LNBF? See below…
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