If you’ll have digibeta you definitely want a blackburst generator.
NTSC/PAL REF IN is where the black burst goes in.
Also composite video goes in as well.
I have my black burst normaled to the REF IN and when I used a cable
on the patch bay from a composite deck it shuts off the black burst
connection and puts the compoiste video in. works great.
I’d email black magic support directly for your other problems.