Normal
Also I think (someone correct me if I'm wrong) NTSC+ATSC = 29.97, 30, 59.94, 60fps. So rule should beNTSC - 29.97, 59.4 - 59NTSC - 30 , 60 - 60 or NTSC 1/NTSC 2... although it maybe that most of ATSC broadcast is 30/60fps (I'm not american)
Also I think (someone correct me if I'm wrong) NTSC+ATSC = 29.97, 30, 59.94, 60fps.
So rule should be
NTSC - 29.97, 59.4 - 59
NTSC - 30 , 60 - 60
or NTSC 1/NTSC 2... although it maybe that most of ATSC broadcast is 30/60fps (I'm not american)