Yes, if you install the dish face exactly plumb/vertical, the elevation scale reading should be the offset angle (assuming the scale is precise; it usually is not very precise, however...)

Otherwise for the offset calculation, you'd need hight and width of

**flat** effective reflective dish area. The 'water-method' could help there. But this only applies when the dish is purely paraboloid (parabolic in three dimensions).

When the dish is meant for multifeed (parabolic vertically, and circular (spherical) horizontally), you'd need the

**deepest point** measures. To find the exact spot of deepest point I find very hard, however. Might be somewhere in the middle between the mount bolts; but even with a marble (or tracker ball of computer mouse) I did not get very precise measurements for that.

I've been thinking of a way to measure and calculate multifeed dishes, but that is still in the concept phase.....

Does the dish have a non-flat face? Or why is it round (rim of defferent hights?), when it is supposedly an offset dish?

Don't use Parabola calculator 2.0 for offset focal point calculations; it gives incorrect results.

Parabola6 is good, however uses only 'depth at the middle'-measurements.

My own calculator uses triangle top of dish -- middle of dish -- bottom of dish measurements as inputs in method D (with offset angle already known), I find that easier and more accurate than method E (the Parabola6-method).

See attached picture to get an impression of the 7 methods (with different inputs needed) for parabolic satellite dish calculations, that I use in my calculator. (Method D is my favorite. Method F is very good for quick and dirty, when the feedhorn position is already known.)

View attachment 136832
Greetz,

A33