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Installation questions -focal length, skew, horn inclination

Discussion of large prime focus satellite dishes used for C-Band signal reception.
beekeeper
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Joined: Fri Oct 24, 2014 12:52 am

Re: Installation questions -focal length, skew, horn inclina

Post by beekeeper » Mon Dec 01, 2014 11:35 pm

blah blah
Last edited by beekeeper on Wed Dec 17, 2014 8:28 am, edited 1 time in total.

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fatso
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Re: Installation questions -focal length, skew, horn inclina

Post by fatso » Tue Dec 02, 2014 4:21 am

beekeeper wrote:One question: Once you track one half of the arc, the other should track as well, right?
Not necessarily...in order to track both sides of the arc, you need to be pointed exactly due south. If you are off by a few degrees, you may only see one side of the arc. But this is easy to fix. If you see 87W - 107W as in your case, but don't see anything between say 43W-58W, then move the dish mount slightly towards the 43W-58W side of the arc. You would do the opposite if you the scenario was reversed.

Remember, the due south setting determines symmetry of the arc. In other words, if you are off, you won't be able to track the arc symmetrically on both sides.

Don't mess with the elevation angle too much. Once you set it, it pretty much stays the same. The only other parameter you will have to play with is declination angle to peak the satellites low in the arc.

After you install one C band dish that tracks the arc, it becomes second nature after that... :fencing
12ft Mesh Dish
C-Band Enthusiast since 1983

beekeeper
Posts: 24
Joined: Fri Oct 24, 2014 12:52 am

Re: Installation questions -focal length, skew, horn inclina

Post by beekeeper » Tue Dec 02, 2014 7:30 am

blah blah
Last edited by beekeeper on Wed Dec 17, 2014 8:13 am, edited 1 time in total.

jess76
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Location: Ceres, California

Re: Installation questions -focal length, skew, horn inclina

Post by jess76 » Tue Dec 02, 2014 3:51 pm

Fatso gave you good advise. Locate "true south" with your dish at the high piont of the swing. Set your elevation for your location, and find a sat. Check both ends of the arc. Use the dec. adjustment to change the "shape' of your dish travel to match the arc. I your travel is to "flat", you need to raise the dec. and lower the elev. If yourtravel is "egg"shape, then you need to lower the dec. and raise the ele. Hope this helps. Jess out in California
9' mesh with c/ku feed horn,lnb's w/polorotor. Recievers hooked up: AZ prem hd., Pansat9500,and Manhattan. I have a few others in my colection including an old Satcruiser and a Captiveworks3000.

beekeeper
Posts: 24
Joined: Fri Oct 24, 2014 12:52 am

Re: Installation questions -focal length, skew, horn inclina

Post by beekeeper » Wed Dec 03, 2014 1:33 am

blah blah

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