hi,
try this and see what you get.
go to the "output selection" and choose "downconvert" on the first choice "sdi&hdmi".
then go to "downconvet mode" at the same menu tab and choose what you want (letterbox,squeeze,crop..squeeze for a widescreen monitor).
i think this will work if you want to use bnc cables and not rca directly from the video out as alan said.
i 'll check the manual too to be sure