Pedro0102 said:
I think we still don't have an accurate view about the situation around the Lisbon area. We lack of data with large dishes. Opposed to the Canary islands, over here there aren't enough > 2m systems. The few existing may not be fined tuned for the 28.2E reception because so far this was not needed. The 2D could be easily received and with such antenna sizes the 2A/2B would also come without any trouble. In my case the lnb skew is fined tuned for 2A north beam reception. I remember that it was quite difficult to get the optimal position. But because the antenna it is in the roof of the building I cannot go there and try to optimise it now... I guess that we will need some time for people to try and fine tune their systems. Likely these will be the expats after loosing BBC when it will move later on (to the 2E?)
The skew on all the Astra 2 satellites should be the same so if you're set for the North Beam
you should be OK.
With Astra 1N this year it's been very easy to set the skew with a spectrum analyser.Go to the Channel 4 Astra 1N transponder,select the opposite polarisation and null it out...All Astra 2 skew should then be set.
The problem is that with older/some LNB's the skew isn't exactly the same position for H and V(you optimise it on one polarity and it's not quite right on the other)though it doesn't really happen with modern LNB's.
It's only a fractional difference,but in a fringe area you need everything to be right.
On prime focus dishes,if the feedhorn is a bit dirty/corroded the same thing can happen,getting the last little bit out of the skew is almost impossible...Answer is to clean it up or change the feedhorn for a new one and try and set the skew again
Looking at your signal image "Maybe" a good 3 to 3.7 metre dish very well adjusted "Might" give pictures in the Lisbon area.
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