LNB “skew” angle is the rotational position of an LNB on the dish arm. The actual “skew angle” is dependent on the satellite and on your. Learn the process of Skewing an LNBf correctly. You will need the correct LNB skew in order to receive the maximum signal for your satellite. Mount it all, including the LNB, and screw it on tightly, except the screws that You will need to find out the azimut, elevation and LNB polarization/skew values.
|Published (Last):||4 June 2016|
|PDF File Size:||7.25 Mb|
|ePub File Size:||19.62 Mb|
|Price:||Free* [*Free Regsitration Required]|
It must be set within certain limits to reduce the number of errors received on both vertically and Horizontally Polarized Transponders. Spectrum analyzers are used to set the skew by professionals installing Uplink ground stations and sometimes receiving or downlink satellite dishes, if they have the time.
So how do technicians without very expensive spectrum analyzers use? Smew is where the term LNB tweaking comes in. Skdw how is LNB tweaking done? This is a step by step process of setting the correct LNB skew on your satellite dish.
How to Adjust an LNB Skew | It Still Works
It is also affected by how much the installed dish deviates from the vertical position. In other words your dish mount pole should be installed vertically upright.
A spirit level should help you achieve this. A dish leaning on its side will not yield good results even if you use the best available LNB in the market. When installing a ,nb dish, you should position the LNB using the clock methodology. This method assumes that the dish is a clock.
The featured image in this post shows an LNB set at this position. Now set the dish to the satellite you want using a Satellite finder or whatever decoder you own.
Make sure you set the dish correctly to get the ln signal strengths.
How to Adjust an LNB Skew
Now this is how LNB tweaking is done This tutorial is for Ku band frequencies on an Offset dish but the basics are the same for C band as well as Prime focus dishes. However circular polarized signals do not require tweaking.
Set your decoder to show the signal strengths of any weak transponder. Take note of how the signal quality bar behaves. There must be a point where the signal disappears completely even when the dish is correctly aligned at the correct satellite. Return the LNB to the original position. From this position push it backwards away from the satellite dish.
The following image shows the same LNB pushed forward and closer to the reflector, case A. The other image, B shows an LNB pushed all the way back away from the reflector. Push it forward again and rotate the LNB. When you hit a new high signal quality level, try not to rotate the LNB, but to skdw it forth and back on this new position. If the dish is correctly aligned at the sked then the weak transponder frequencies will improve.
Switch to the other polarization, in this case V and compare the signal strengths.
You should make sure that the signal strengths are consistent with each other. When you hit the highest signal strength, tighten the screws holding the LNB. That is how LNB tweaking is done. Install Coaxial speakers vertically to avoid Dust and particles damage.