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Originally Posted by brentb636
"Have you tried adjusting your dish elevation at the bracket ? Mine was off by about 8 degrees.
The fact that you are getting all these circular birds, but at LOW quality levels makes me think that your azimuth setting is pretty close.
Linear birds have much weaker signals than circular echostar birds. Since the circular signals are low, the linear ones are probably nonexistent. I wouldn't suspect a problem with the lnb so far.
Go back to Nimiq 2, and adjust dish elevation at bracket ( definetly NOT at the motor), and see if you can improve the quality. I get 85-100% on the big circular birds, with a 31" dish, so you should get better quality than that."
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I did adjust the dish elevation angle, from 23.6 calculated for my dish/motor/location to almost 30 degrees, before my previous post to get higher quality signal but it did not reach 80-95 until I pulled the LNB straight out from its arm 3.5 to 4.5 inches. As I stated previously I believe that LNB is not in the focal point of the dish as the arm it is shorter by 3.6 inches. Fortec Star 120 cm dish suppose to have 720 mm focal distance and not 645 mm I measured. The 645 mm coresponds closer to a Fortec Star 100 cm dish with 600 mm focal distance. The F/D ratio is the same, 0.6 for both dishes. 720 mm / 0.6 = 1200 mm dish and 600 mm / 0.6 = 1000 mm dish; 645 mm / 0.6 = 1075 mm dish. Therefore no matter how hard I try I will not get linear birds in until I get the LNB properly in the focal point. See this excellent article on offset dishes here
http://www.satsig.net/22-deg-offset-dish.htm.I emailed Sadoun asking for the proper gear for 120 cm dish. At this point I am tracking 4 circular birds OK and have no linear birds in as the quality signal is very low. I believe this focus problem forced me to properly align to True South, corect the elevation angle, and generaly align the dish to the point where all I need now is to get the LNB into the focal point to start calling it done. Any of you have a 120 cm Fortec Star Dish? Maybe you could take a measurement of the LNB arm length and post it here please. Thank you.