i'm making progress.. i have an input signal at 1080p 50hz.. (i had to edit the kramer settings using a dedicated monitor and match the hdmi output settings to the catalyst/blackmagic input settings, running 32 bit)
i'm still wondering about the blackmagic input settings and whether they affect the input pre-catalyst. i am guessing they do, although i'm not sure they'd ever be needed.
i'll post an answer if i ever figure it out...
thanks