No, it's not round, it's 76 x 81.2:
http://www.sadoun.com/Sat/Products/F...sh-antenna.htm
Also, what is interesting,
Sadoun sells a separate
Pole Mount Bracket, fitting both 90cm and 80cm dishes, and they have different offset angles! I cannot confirm that scale on my bracket is calculated for offset angle, sorry about that.
Maybe someone else on this forum has a clue? Manufacturer, dealer? How do you suppose to set an angle for just one satellite, with no motor, if there is no scale?