How to Adjust Linear LNB Skew
A multiple LNB satellite television dish must be aligned in three directions in order to correctly receive a satellite signal. Each eye on the dish's LNB receives a signal from a single satellite. Therefore each eye must be perfectly aimed at the satellite. The dish's azimuth refers to the compass direction. The elevation describes how high the eyes look above the horizon. The skew describes how much the dish is tilted, or rotated left or right to align the LNB eyes with multiple satellites in space.
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Things You'll Need
- Manufacturer's instruction manual
- 7/16-inch open-end wrench
- 1/2-inch open-end wrench
Instructions
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1
Consult the manufacturer's installation manual, which is included in each dish box. The azimuth, elevation and skew settings are different for every location in the country. Find your location on the map included in the instructions, and then locate the proper setting on the printed tables.
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2
Look at the back of the dish, where the dish-mounting bracket pivots around the dish's pole bracket. They are held together by three bolts, and on the back of the dish mounting bracket is a set of angle measurements. These numbers look like a protractor you used in high school geometry class.
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3
Loosen the three bolts which connect the pivoting parts with either a seven-sixteenths or half-inch wrench. Rotate the dish clockwise or counterclockwise, depending on the setting obtained from the printed instructions, and set the arrow at the recommended skew angle. Retighten the three bolts to hold the dish in the proper alignment.
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Tips & Warnings
When anchoring the dish's mounting pole to a building, set the pole so that it is vertical, perfectly plumb, not tilted left or right, up or down. As long as the pole is vertical, and the skew is properly set, the dish can be properly aligned to receive signal from all the required satellites.
References
Resources
- Photo Credit Comstock Images/Comstock/Getty Images
