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I expect you are referring to the device associated with a satellite antenna. A more complete name for these is low-noise block downconverter.
- The signals that these antennae receive are weak. An initial stage of the unit provides low-noise amplification that avoids contaminating the signal (with noise).
- The signals are in a band of frequencies that (a) are not processed by conventional television receivers, and (b) must be conducted using waveguides which would make using these frequencies impractical in homes for this purpose. Therefore, these units include an oscillator and a mixer to convert the satellite band to the television band using the heterodyne principle. These frequencies can be transmitted over more ordinary co-axial cable.
- The television band signal will usually be further amplified within the block.
More information is available from the wikipedia article.
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∙ 10y ago
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What is LNB related to telecom?
Low noise block-downconverter.A low noise block-downconverter (or LNB) is the receiving device of a parabolic satellite dish antenna of the type commonly used for satellite TV reception. The device is sometimes called an LNA (for low noise amplifier), LNC (for low noise converter) or even LND (for low noise downconverter) but as block-downconversion is the principal function of the device, LNB is the preferred term, although this acronym is often incorrectly expanded to the incomplete descriptions, low noise block or low noise block converter.
What is the meaning of lbn connected to satellite disc?
low noise block
What does noise cancelling mean for a headset?
Noise cancelling headsets block out ordinary noises in the background that can be disruptive to conversations. Noise cancelling headsets are useful for home office workers to block out household noises when telecommuting to work.
What does it mean when your engine has a knocking noise?
When your engine has a knocking noise, it could mean that a rod has been thrown. It could also mean you are low on oil.
What is LNB dish satellite?
Low Noise Block-down converter (so called because it converts a whole band or "block" of frequencies to a lower band). Thanks.
What are three types of noise that can block communication?
what are the three types of noise that block communication
What does it mean if your car engine is making a high pitched noise?
If it was overheating at the time, you cracked the block.
What does loud mean?
loudness means how high or low a noise is. Edited by Barrowc
What is a satellite LMB?
Have you ever wondered what is an LNB and what is an LNB LO frequency ? Here is some information about LNBs that I hope will help explain matters.The abbreviation LNB stands for Low Noise Block. It is the device on the front of a satellite dish that receives the very low level microwave signal from the satellite, amplifies it, changes the signals to a lower frequency band and sends them down the cable to the indoor receiver.The expression low noise refers the the quality of the first stage input amplifier transistor. The quality is measured in units called Noise Temperature, Noise Figure or Noise Factor. Both Noise Figure and Noise Factor may be converted into Noise Temperature. The lower the Noise Temperature the better. So an LNB with Noise Temperature = 100K is twice as good as one with 200K.The expression Block refers to the conversion of a block of microwave frequencies as received from the satellite being down-converted to a lower (block) range of frequencies in the cable to the receiver. Satellites broadcast mainly in the range 4 to 12 to 21 GHz.
What does it mean when the transmission light comes on and the engine makes a knocking noise?
Your transmission fluid might be low.
What does it mean when your steering wheels makes noise when turning?
the car may be low on power steering fluid
What is the function of an LNB for satellite television?
LNB stands for Low Noise Block. This device amplifies the weak incoming signal from the satellite and converts it to a signal that is usable by the television.
