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| DTH Services » Glossary |
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Glossary |
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KU-Band - The range of frequencies between 11 and 14 gigahertz (billions of cycles per second), used increasingly by communication satellites. Requires smaller ground antennas usually four feet in diameter.
KVH TracvisionAn accessory that helps satellite dishes work better on boats. KVH TracVision is a stabilizer that keeps a small satellite antenna precisely pointed at satellites. As a boat moves, TracVision moves the satellite dish in exactly the opposite direction, assuring uninterrupted satellite TV reception on a boat.
Jack PanelThe panel on the back of the DIRECTV Receiver where all connections for the system are located.
L-Band - An L-Band is the frequency range from 0.5 to 1.5 GHz. All satellite TV systems use this frequency (950 to 1450 MHz) to carry the satellite signal from the dish to the receiver.
Latitude - The distance, expressed in degrees, from the earth's equator that points north and south. The equator is assigned the value of 0 degrees, the North Pole is 90 degrees and the South Pole is -90 degrees.
LNA - Low Noise Amplifier: The low noise amplifier used in older satellite antenna systems. The LNA amplifies the entire bandwidth of signals coming down from a satellite and presents them as a wide band signal to the downconverter
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LNB - Low Noise Block Downconverter: In newer satellite antenna systems the Low Noise Amplifier and Downconverter have been incorporated into a single unit. The downconverter used is a block downconverter (see: LNA; downconverter)
LNBFAn LNBF (usually called an LNB) is a Low Noise Block Converter with Integrated Feed. It amplifies received signals and converts them from microwaves to lower L-band frequency signals which are then sent along a cable to the satellite receiver.
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