AFAIK, standard black burst will work for 29.97 and, I guess, 59.94. Tri-level sync comes into play for 23.976 material. The AJA Gen10 can produce both black burst and tri-level aync at an excellent price. Many people suggest looping the ref video to the composite video in of a BVW1800. I’ve not heard if it helps with other Beta decks. If you search for Bob Zelin and Gen10, you’ll find more specific info from someone who really knows tech.
John
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