Sky TV in Valencia. UK TV in Valencia. Satellite TV News and Information
All content used on this site are protected by copyright and should not be used without expressed permission. (C)2003 - 2011 J Worby
Costa Blanca Free Adverts and Business Directory
Sky TV in Valencia. UK TV in Valencia. Satellite TV News and Information
All content used on this site are protected by copyright and should not be used without expressed permission. (C)2003 - 2011 J Worby
Costa Blanca Free Adverts and Business Directory
Low Noise Blocks LNBs Skew Alignment
The LNB on the end of the satellite dish picks up either a horizontal or a vertical signal. Your satellite receiver sends an 18volt current to the LNB when it requires a horizontal signal and a 13volt current for a vertical signal.
For satellite reception, the 'skew' angle of the LNB is also important. The 'skew' angle represents the horizontal/vertical plane of the LNB. When a satellite dish is facing towards a satellite at due South, the plane of the LNB will be vertical (straight down). As the dish is moved around either East or West to receive other Satellites the LNB will need to be tilted (rotated), clockwise for West and counter clockwise for East.
As you travel around Europe, the correct skew position of the LNB changes very slightly.
The LNB skew angle needs to be set correctly for the LNB to differentiate between horizontally and vertically polarized signals. If the LNB skew is wrong then you may not be able to obtain some channels.
The main effect of the LNB being out of Skew is a reduction in the “Signal Quality”. The easiest way to make adjustments with out a spectrum analyser is to slightly adjust the LNB and then check the satellite signal quality reading on your Sky or Freesat box.
On the Costa Blanca an incorrectly skewed LNB can result in the loss of the weaker North beam frequency transponders on Astra 2A and Astra 2B. A well done installation will ensure that the LNB skew is correct so that the North beam channels are not loss or loss is kept to a minimum.
An incorrect skew angle on the LNB can also result in the Sky Signal test screen showing no or little Signal Strength or Signal Quality - as this screen on the Sky digibox is measuring the 11778 North beam satellite frequency frequency - and being a north beam satellite frequency the LNB skew is critical.
An example of an LNB at the wrong skew angle. I was called to this dish, installed by another satellite installation company, as the clients were not receiving the same channels as their neighbours whose dish I had installed.
Ideally the LNB skew for the Costa Blanca for the UK TV channels on the Astra 2a, Astra 2B, Astra 3D and Eurobird 1 satellites should have the bottom of the LNB, where the cables area, at an angle of about 7oclock.