a33
Specialised Contributor
- Joined
- Sep 24, 2009
- Messages
- 1,252
- Reaction score
- 720
- Points
- 113
- Age
- 63
- My Satellite Setup
-
XSAT410
Rebox RE-9000
- My Location
- The Netherlands
@PrvtN00b :
Well, I assume there ARE dishes out there with accurate position for the LNB holder and proper LNB-aiming.
But as this is (just) an assumption, measuring and checking is very usefull, when you want to get the most out of your dish!
For a paraboloid dish (parabolic both vertically and horizontally) with a flat face, the best way to measure it is finding three measures: hight and width of (the working area of) the dish, and exact depth at the middle; and then let a calculator do the work.
Parabola6 by Strannik is a good calculator, and so is my calculation spreadsheet (results for CM180 shown in an above post).
Don't use Parabola Calculator 2.0 though, or the Satsig calculator. They use the deepest point measurement for calculation, which in theory is OK (see also my calculator), but these two calculators alas give wrong outcomes!
Knowing the exact offset angle of your dish also gives you the opportunity to set the dish elevation by measuring the angle of the dish face. That is very usefull when setting declination towards due south/north, with no satellite at exactly that direction.
Greetz,
A33
Well, I assume there ARE dishes out there with accurate position for the LNB holder and proper LNB-aiming.
But as this is (just) an assumption, measuring and checking is very usefull, when you want to get the most out of your dish!
For a paraboloid dish (parabolic both vertically and horizontally) with a flat face, the best way to measure it is finding three measures: hight and width of (the working area of) the dish, and exact depth at the middle; and then let a calculator do the work.
Parabola6 by Strannik is a good calculator, and so is my calculation spreadsheet (results for CM180 shown in an above post).
Don't use Parabola Calculator 2.0 though, or the Satsig calculator. They use the deepest point measurement for calculation, which in theory is OK (see also my calculator), but these two calculators alas give wrong outcomes!
Knowing the exact offset angle of your dish also gives you the opportunity to set the dish elevation by measuring the angle of the dish face. That is very usefull when setting declination towards due south/north, with no satellite at exactly that direction.
Greetz,
A33
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