X70 Shutter Angle Problem
 

Hi, just got a PXW-X70. I want to set shutter angle to 180. But, if I set it, say with a 30p setting, and then I change to 60p, the shutter angle changes on its own to 360.

I really just want shutter angle to remain at 180 degrees no matter what I'm recording. Is there a way to set it to stay at 180 degrees?

Thanks.