LNB angle
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That is for linear polarized signals, when you have to skew LNB in the holder to get maximum possible reception. In case of circularity polarized reception, skew is not necessary.
You have to skew your LNBF to match the satellite according to your location.
www.dishpointer.com is a good site to use for this. Put in your exact address and then select which satellite you are interested in.
It will tell you the Az and El as well as the skew angle +/-.
It will tell you the Az and El as well as the skew angle +/-.
SATBEAMS program
I like this program more. We find, for example, Chicago and the necessary satellite. For example, 97W, Ku band. And everything is on the left, everything is for customization.
Satbeams - World Of Satellites at your fingertips
I like this program more. We find, for example, Chicago and the necessary satellite. For example, 97W, Ku band. And everything is on the left, everything is for customization.
Satbeams - World Of Satellites at your fingertips
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I like Satbeams a lot for its ease of navigation.
However I would add that I would take the "recommended dish size" as just that, a recommendation. It is usually overly optimistic for C-Band, as well as for marginal Ku-Band signals, and I think it's only based on EIRP, and does not take into accounts other important factors such as modulation (8PSK requires a stronger, cleaner signal than QPSK), FEC (the higher the FEC, the least robust the correction is, thus requiring a larger dish for a cleaner signal), the actual transmitting power of the uplink, the beamwidth of a smaller dish (interference from adjacent satellites) and the elevation (only a problem at low elevation).
Example, 103W, where the transponder with NHK is easy even on a 50cm dish, but some of the NBC transponders can be quite challenging even on a 120cm. Or BVN on 113W where for my location, an 80cm dish is the recommendation. Well, with 80cm you barely get it and there's little to no margin for any degradation due to weather etc.
However I would add that I would take the "recommended dish size" as just that, a recommendation. It is usually overly optimistic for C-Band, as well as for marginal Ku-Band signals, and I think it's only based on EIRP, and does not take into accounts other important factors such as modulation (8PSK requires a stronger, cleaner signal than QPSK), FEC (the higher the FEC, the least robust the correction is, thus requiring a larger dish for a cleaner signal), the actual transmitting power of the uplink, the beamwidth of a smaller dish (interference from adjacent satellites) and the elevation (only a problem at low elevation).
Example, 103W, where the transponder with NHK is easy even on a 50cm dish, but some of the NBC transponders can be quite challenging even on a 120cm. Or BVN on 113W where for my location, an 80cm dish is the recommendation. Well, with 80cm you barely get it and there's little to no margin for any degradation due to weather etc.
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